CN115140908A - Biological contact oxidation and microfiltration membrane filtration combined sewage treatment method and system - Google Patents
Biological contact oxidation and microfiltration membrane filtration combined sewage treatment method and system Download PDFInfo
- Publication number
- CN115140908A CN115140908A CN202210966899.7A CN202210966899A CN115140908A CN 115140908 A CN115140908 A CN 115140908A CN 202210966899 A CN202210966899 A CN 202210966899A CN 115140908 A CN115140908 A CN 115140908A
- Authority
- CN
- China
- Prior art keywords
- filtration
- sewage
- tank
- water
- microfiltration membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001471 micro-filtration Methods 0.000 title claims abstract description 98
- 239000010865 sewage Substances 0.000 title claims abstract description 91
- 238000011282 treatment Methods 0.000 title claims abstract description 52
- 230000003647 oxidation Effects 0.000 title claims abstract description 49
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005374 membrane filtration Methods 0.000 title claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 146
- 239000012528 membrane Substances 0.000 claims abstract description 118
- 238000001914 filtration Methods 0.000 claims abstract description 49
- 238000004140 cleaning Methods 0.000 claims abstract description 40
- 238000000926 separation method Methods 0.000 claims abstract description 32
- 239000010802 sludge Substances 0.000 claims abstract description 27
- 238000000746 purification Methods 0.000 claims abstract description 19
- 238000005086 pumping Methods 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 9
- 238000011221 initial treatment Methods 0.000 claims abstract description 7
- 239000002351 wastewater Substances 0.000 claims abstract description 5
- 238000006243 chemical reaction Methods 0.000 claims description 54
- 239000000945 filler Substances 0.000 claims description 32
- 239000007788 liquid Substances 0.000 claims description 13
- 238000005273 aeration Methods 0.000 claims description 11
- 239000004744 fabric Substances 0.000 claims description 7
- 238000005842 biochemical reaction Methods 0.000 claims description 6
- 230000003750 conditioning effect Effects 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 3
- 230000001954 sterilising effect Effects 0.000 claims description 2
- 238000004065 wastewater treatment Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000004134 energy conservation Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 230000008569 process Effects 0.000 description 13
- 239000000306 component Substances 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000008358 core component Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000014759 maintenance of location Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 description 2
- 239000012510 hollow fiber Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 239000004155 Chlorine dioxide Substances 0.000 description 1
- 241000588724 Escherichia coli Species 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 239000005708 Sodium hypochlorite Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- -1 ceramsite Substances 0.000 description 1
- 235000019398 chlorine dioxide Nutrition 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000645 desinfectant Substances 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- CEJLBZWIKQJOAT-UHFFFAOYSA-N dichloroisocyanuric acid Chemical compound ClN1C(=O)NC(=O)N(Cl)C1=O CEJLBZWIKQJOAT-UHFFFAOYSA-N 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000006213 oxygenation reaction Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000011272 standard treatment Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/42—Liquid level
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/104—Granular carriers
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/106—Carbonaceous materials
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/107—Inorganic materials, e.g. sand, silicates
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The method comprises the steps of firstly carrying out primary treatment on sewage by using a biological contact oxidation device to remove partial sludge and harmful substances in the sewage; then, a microfiltration membrane separation and filtration device is used for secondary treatment, so that residual sludge and harmful substances in the wastewater are further removed, and primary clear water is obtained; the primary clean water is disinfected to reach the standard; and pumping part of clear water reaching the standard back to the biological contact oxidation cleaning device and the micro-filtration membrane separation and filtration device respectively. The invention can reasonably, efficiently and stably treat the sewage and then discharge the sewage after reaching the standard, has large sewage treatment capacity, good purification treatment effect, low system operation cost, easy maintenance, energy conservation and environmental protection.
Description
Technical Field
The invention belongs to the technical field of sewage treatment methods and treatment systems.
Background
The membrane-bioreactor process, i.e., the MBR process, is a technology combining membrane separation technology with biochemical treatment of sewage, and is also called as a membrane separation activated sludge process. Most of filter media in the membrane bioreactor applied industrially at present are hollow fiber membranes or flat membranes, the pore diameter of the filter media is 0.1-0.4 mu m, active sludge and macromolecular organic matters in a biochemical reaction tank can be retained, the concentration of the active sludge is greatly improved, the Hydraulic Retention Time (HRT) and the Sludge Retention Time (SRT) can be respectively controlled, a secondary sedimentation tank is omitted, the active sludge in the reactor can carry out biodegradation on the organic matters in sewage, the substances which are difficult to degrade can be continuously reacted and degraded in the reaction tank, and the degraded water is filtered by a membrane device to enable the water to reach the standard for recycling or discharging. Therefore, the membrane-bioreactor process greatly strengthens the function of the bioreactor through a membrane separation technology, can regularly obtain clear and up-to-standard treated water during operation, and further has the following advantages:
(1) Due to the interception function of the membrane, the high-concentration microbial biomass is maintained in the reactor, and the biochemical efficiency is improved;
(2) The membrane separation can make microorganisms completely retained in the bioreactor, realize the complete separation of Hydraulic Retention Time (HRT) and Sludge Retention Time (SRT) of the bioreactor, and simultaneously realize short HRT and long SRT (or long sludge discharge period), so the device has the functions of high volume load and strong load impact resistance.
However, the existing membrane-bioreactor process still has some defects, mainly represented by:
(1) In the operation process, the membrane is easy to be polluted, and the reduction rate of the membrane flux is fast. This is because the pore size of the membrane is 0.1 to 0.4 μm, so that particles are deposited on the surface of the membrane, bacteria and macromolecules on the surface of the membrane are adsorbed or enter the membrane material, or the pores of the membrane are blocked. If the water is not cleaned and maintained in time, the water yield is reduced, the effluent quality is unstable and reaches the standard, the service life of the membrane material is accelerated, and further, the operation and maintenance management are inconvenient, so that the operation cost is high;
(2) Most of membrane separation materials in the membrane bioreactor applied in the industrialized industry at present are hollow fiber membranes or flat membranes, the membrane aperture of the membrane is 0.1-0.4 μm, taking the flat membranes as an example, the operation flux of membrane reaction element pieces is 10L/square meter, h-50L/square meter, h, obviously, because the water yield of the membrane reaction element pieces is low, the required membrane area quantity is matched in a way that the quantity of the membrane elements is accumulated in direct proportion when the engineering design and the sewage treatment are carried out, namely, the smaller the membrane aperture is, the more the quantity of the membrane elements are increased, the quantity of the membrane elements accumulated into the required membrane area quantity can meet the engineering design and the required water yield (membrane water quantity), so the manufacturing cost and the engineering cost of the membrane separation materials are higher, and the MBR membrane reactor has poor cost performance and prevents the wide application thereof;
(3) The membrane bioreactor applied in industrialization at present is easy to be polluted in the operation process, the reduction speed of the membrane flux is fast, when the membrane flux of a small number of membrane reaction element pieces is invalid (the operation flux is less than 10L/square meter. H), the invalid membrane reaction element pieces can not be correspondingly replaced into qualified membrane reaction element pieces at all, because the membrane reaction element pieces have no interchangeability, if the membrane reaction element pieces are correspondingly replaced into the qualified membrane reaction element pieces, the whole MBR membrane reaction element is correspondingly replaced into the qualified MBR membrane reaction element, the water yield (membrane water yield) required by engineering design can be met, and the maintenance and operation cost and the engineering cost of the membrane separation material are high, so the cost performance of the MBR membrane reactor is poor, and the wide application and use value of the MBR membrane reactor is hindered.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a sewage treatment method and a sewage treatment system combining biological contact oxidation and microfiltration membrane filtration, which have low manufacturing cost and low operating cost, so as to reasonably, efficiently and stably treat sewage and wastewater with medium and small scale sewage treatment capacity to reach the standard.
The sewage treatment method combining biological contact oxidation and microfiltration membrane filtration comprises the following steps:
s1, treating sewage by using a biological contact oxidation device, and performing primary treatment on the sewage through aerobic biochemical reaction, adsorption and filtration to remove partial sludge and harmful substances in the wastewater;
s2, performing secondary treatment on the sewage subjected to the primary treatment by adopting a microfiltration membrane separation and filtration device, and further removing residual sludge and harmful substances in the sewage to obtain primary clear water;
s3, disinfecting the primary clear water to obtain dischargeable clear water reaching the standard;
and S4, pumping part of clear water reaching the standard back to the biological contact oxidation device and the micro-filtration membrane separation and filtration device respectively, cleaning the biological contact oxidation device and the micro-filtration membrane separation and filtration device, and discharging the cleaned sludge and sewage out of the biological contact oxidation device and the micro-filtration membrane separation and filtration device.
The sewage treatment system for realizing the sewage treatment method comprises a sewage regulating tank, a biological contact oxidation and microfiltration membrane filtration integrated combination device, a clean water tank, a water inlet pipeline, a lifting water pump, a water outlet pipeline and a cleaning water pipe, wherein the sewage regulating tank, the biological contact oxidation and microfiltration membrane filtration integrated combination device and the clean water tank are sequentially arranged;
the integrated biological contact oxidation and microfiltration membrane filtration combined device comprises a filtration purification tank, a mounting frame and a first liquid level controller which are arranged in the filtration purification tank, a biological reaction device arranged in the middle of the mounting frame, microfiltration membrane filtration tanks symmetrically arranged on the front side and the back side of the biological reaction device, and an aeration device arranged at the bottom of the filtration purification tank, wherein the water outlet end of a water inlet pipeline is inserted into the filtration purification tank;
the biological reaction device comprises a group of replaceable filler carrier reaction components arranged on the mounting rack and a coaming plate encircled on the periphery of the filler carrier reaction components; the filler carrier reaction assembly comprises two vertical pipes with opposite notches, two layers of screen plates and filler, wherein the vertical pipes are symmetrically arranged, the two layers of screen plates are inserted into the notches at the two ends, the filler is filled in an inner cavity between the two layers of screen plates, and gaps are reserved between the two ends of the outer surface of each screen plate and the notches of the vertical pipes;
the microfiltration membrane filter tank is internally provided with a replaceable microfiltration membrane core assembly, the inner side tank wall of the microfiltration membrane filter tank is a front enclosing plate and a rear enclosing plate of the filler carrier reaction assembly, water passing holes are distributed on the front enclosing plate and the rear enclosing plate, water pumping pipelines are inserted at two sides of the microfiltration membrane filter tank, and the water pumping pipelines are connected with the water outlet pipelines; the micro-filtration membrane core assembly comprises a support framework and industrial filter cloth wound on the support framework;
the cleaning water pipes for connecting the clean water tank and the integrated biological contact oxidation and microfiltration membrane filtration device comprise a first group of cleaning water pipes which are led out from the clean water tank and are respectively extended and inserted into the vertical pipes at two sides of the filler carrier reaction assembly, and a second group of cleaning water pipes which are led out from the clean water tank and are extended and inserted into the supporting framework of the microfiltration membrane core assembly, wherein cleaning water pumps are arranged on the cleaning water pipes;
the bottoms of the sewage filtering and purifying tank and the micro-filtration membrane filtering tank are respectively provided with a water outlet and a sludge discharge port;
a pressure gauge and a flow meter are arranged on the water outlet pipeline behind the self-priming water pump;
the aeration device is connected with a Roots blower through an air supply pipeline, and an electromagnetic valve is arranged on the air supply pipeline;
the lifting water pump, the self-priming water pump, the cleaning water pump, the pressure gauge, the flow meter, the Roots blower, the electromagnetic valve and the first liquid level controller are all connected with the PLC control system.
Furthermore, a second liquid level controller is arranged in the sewage adjusting tank, and the second liquid level controller (3) is connected with a PLC control system.
Furthermore, the aperture of a membrane formed by winding industrial filter cloth on a supporting framework in the microfiltration membrane core assembly in the microfiltration membrane filtration tank is 0.1-25 μm.
The invention has at least the following advantages:
1. the method integrates a biological contact oxidation process and a microfiltration membrane filtration process, and carries out continuous and progressive orderly treatment on the sewage by sequentially adopting a biological contact oxidation device and a microfiltration membrane separation and filtration device, and the clear water obtained by the treatment becomes the standard water which can be directly discharged after being disinfected, so that the sewage purification treatment efficiency is high; meanwhile, the water reaching the standard obtained by self treatment is returned to the biological contact oxidation device and the micro-filtration membrane separation and filtration device for online cleaning, and the cleaning water can be treated by the biological contact oxidation device and the micro-filtration membrane separation and filtration device, so that a virtuous cycle of sewage treatment and cleaning of treatment equipment is formed, and the device is energy-saving and environment-friendly.
2. The sewage treatment system disclosed by the invention is compact in equipment layout and small in occupied area, and particularly, the biological contact oxidation and microfiltration membrane separation and filtration integrated combined device is characterized in that the biological contact oxidation device and the microfiltration membrane separation and filtration device are arranged in the same filtration and purification tank, can be made into an integral device and sold as a single device, so that the modular and standardized construction of the sewage treatment system is easy to realize, the manufacturing cost is reduced, and the device is also easy to expand and reconstruct the original sewage treatment plant.
3. By adopting the sewage treatment system, sewage is treated and filtered by the biological contact oxidation device and the micro-filtration membrane separation and filtration device in sequence, and the aeration device is arranged, so that the mass transfer process and the action effect are enhanced in a compact layout space, the oxygenation capacity of the sewage can be improved, and the sewage purification capacity and purification effect are greatly improved.
4. The filler carrier reaction component of the biological contact oxidation device and the microfiltration membrane core component of the microfiltration membrane separation and filtration device can be replaced, and the biological contact oxidation device is simple to mount and dismount, is convenient to overhaul and maintain, and can improve the operation efficiency of a sewage treatment system.
5. The filler carrier reaction component and the microfiltration membrane core component have scientific and reasonable structural design, and can be efficiently cleaned by being matched with a reasonable and efficient cleaning system, so that the operation time of the filler carrier reaction component and the microfiltration membrane core component is prolonged, the machine halt maintenance is reduced, and the operation cost is reduced.
6. The invention effectively solves the problems and difficulties that the sludge treatment component of the existing sewage treatment system is easy to be polluted and difficult to maintain, the manufacturing cost of the micro-filtration membrane core component is high, the running cost of the system is overhigh, and the like, so that the treated water quality is better, the sewage treatment capacity is stronger, the system is kept to always stably reach the standard and output water, the operation and the maintenance are more convenient, and the automatic control of the whole treatment process is realized. Is particularly suitable for large-scale sewage treatment plants with larger sewage treatment capacity.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic diagram of the hydroelectric control of the system of the present invention;
FIG. 3 is a schematic plan view of the system of the present invention;
FIG. 4 isbase:Sub>A schematic elevation view of the integrated composite filtration unit of FIG. 3 taken along A-A of the system of the present invention;
FIG. 5 is a schematic view of an integrated biological contact oxidation and microfiltration membrane filtration device;
FIG. 6 is a cross-sectional view of a microfiltration membrane core assembly;
FIG. 7 is a schematic diagram of a shroud between the microfiltration membrane filtration tank and the packing carrier reaction module;
FIG. 8 is a schematic view of a bioreactor and a microfiltration membrane filtration tank;
FIG. 9 is a schematic view of a purge line arrangement.
Detailed Description
The invention is further explained by combining the drawings in the specification.
The sewage treatment method combining biological contact oxidation and microfiltration membrane filtration is a new technology combining membrane separation technology and sewage biochemical treatment, also called membrane separation biological contact oxidation method. As shown in fig. 1, the method comprises the following steps:
s1, treating sewage by using a biological contact oxidation device, and performing primary treatment on the sewage through aerobic biochemical reaction, adsorption and filtration to remove partial sludge and harmful substances in the sewage;
s2, performing secondary treatment on the sewage subjected to primary treatment by adopting a micro-filtration membrane separation and filtration device, and further removing residual sludge and harmful substances in the sewage to obtain primary clear water;
s3, sterilizing the primary clear water to obtain dischargeable clear water reaching the standard;
s4, as shown in figure 2, pumping part of clear water reaching the standard back to the biological contact oxidation device 6 and the micro-filtration membrane separation and filtration device 13 respectively, cleaning the biological contact oxidation device and the micro-filtration membrane separation and filtration device, discharging the cleaned sludge and sewage out of the biological contact oxidation device and the micro-filtration membrane separation and filtration device, and returning the discharged cleaned sewage to the sewage regulating tank 1.
As shown in fig. 3 and 4, the sewage treatment system for implementing the sewage treatment method of the present invention includes a sewage conditioning tank 1, a biological contact oxidation and microfiltration membrane filtration integrated combination device, a clean water tank 17, a water inlet pipeline 9 connecting the sewage conditioning tank and the biological contact oxidation and microfiltration membrane filtration integrated combination device, a lift water pump 2 disposed on the water inlet pipeline and located in the sewage conditioning tank 1, a water outlet pipeline 11 connecting the biological contact oxidation and microfiltration membrane filtration integrated combination device and the clean water tank and equipped with a self-priming water pump 14, and a cleaning water pipe connecting the clean water tank and the biological contact oxidation and microfiltration membrane filtration integrated combination device.
The integrated biological contact oxidation and microfiltration membrane filtration combined device is shown in fig. 3, fig. 4, fig. 5 and fig. 8, and comprises a filtration and purification tank 4, an installation frame 5 and a first liquid level controller 7 which are arranged in the filtration and purification tank, a biological reaction device 6 arranged in the middle of the installation frame, a microfiltration membrane filtration tank 13 symmetrically arranged at the front and the back of the biological reaction device, and an aeration device 8 arranged at the bottom of the filtration and purification tank, wherein the water outlet end of a water inlet pipeline 9 is inserted into the filtration and purification tank 4. The aeration device is a device in the prior art, and an air supply pipe of the aeration device is connected with a Roots blower.
The biological reaction device 6 comprises a group of replaceable filler carrier reaction components arranged on the mounting rack 5 and a coaming 6.3 enclosing the periphery of the filler carrier reaction components; the filler carrier reaction assembly comprises two vertical pipes 6.1 which are symmetrically arranged and have opposite notches, two layers of screen plates 6.2 of which the two ends are inserted in the notches, and filler filled in an inner cavity between the two layers of screen plates, wherein gaps are reserved between the two ends of the outer surface of each screen plate and the notches of the vertical pipes. When the filler carrier reaction assembly needs to be cleaned, the cleaning system is started through the PLC control system, cleaning water is injected into the vertical pipes on the two sides of the screen plate through the cleaning pipeline, water is sprayed out of the gap, the screen plate and the filler are washed from the two sides, and the function of cleaning the filler carrier reaction assembly periodically and off-line is achieved. The filler filled in the inner cavity between the two layers of the net plates can adopt biological reaction fillers with adsorption and filtration functions, such as activated carbon, ceramsite, stainless steel tennis balls, carbon fibers and the like. The whole filler carrier reaction element is a plate-shaped element and is inserted on the mounting frame at equal intervals. As shown in fig. 5, vertical square pipes and bottom fixed support square pipes may be welded in pairs on the mounting frame, and a slot into which the packing carrier reaction element is inserted is formed between the two vertical square pipes.
As shown in fig. 3, 4 and 5, a replaceable microfiltration membrane core assembly 13.1 is arranged in the microfiltration membrane filtration tank 13, the inner side tank wall of the microfiltration membrane filtration tank is the front and rear enclosing plates of the filler carrier reaction assembly, as shown in fig. 7, water passing holes 6.3.1 are distributed on the front and rear enclosing plates, water pumping pipelines 13.2 are inserted at two sides of the microfiltration membrane filtration tank, and the water pumping pipelines are connected with the water outlet pipeline 11. As shown in FIG. 6, the microfiltration membrane core assembly 13.1 comprises a support framework 13.1.1 and industrial filter cloth wound on the support framework, wherein the pore diameter of a membrane formed by winding the industrial filter cloth on the support framework is 0.1-25 μm. The supporting framework is a cuboid hollow frame, so that water passing and cleaning are facilitated. Because the residual sludge and impurities in the water entering the microfiltration membrane filter tank are less, the microfiltration membrane core assembly is formed by the hollow support framework and the industrial filter cloth wound on the support framework, so that the residual waste and impurities in the water can be deeply filtered, smooth water passing can be ensured, and the water treatment efficiency is improved. The cleaning water pipe is directly inserted into the hollow supporting framework, and the micro-filtration membrane core assembly can be directly washed. The microfiltration membrane core assembly can be directly and vertically placed in a microfiltration membrane filter tank, and can be directly taken out when needing to be replaced and maintained.
As shown in fig. 2 and fig. 9, the cleaning water pipes connecting the clean water tank and the integrated biological contact oxidation and microfiltration membrane filtration device include a first group of cleaning water pipes which are led out from the clean water tank and are extended into the vertical pipes 6.1 at both sides of the filler carrier reaction assembly in two ways, and a second group of cleaning water pipes which are led out from the clean water tank and are extended into the support framework 13.1.1 of the microfiltration membrane core assembly 13.1, and a cleaning water pump 12 is arranged on the cleaning water pipes. In order not to affect the expression of the integrated combined device of biological contact oxidation and microfiltration membrane filtration, the cleaning water pipe is not shown in fig. 3 and 4.
The biological reaction device 6 and the microfiltration membrane filter tank 13 are both arranged on the mounting frame 5, the mounting frame supports the biological reaction device 6 and the microfiltration membrane filter tank 13 in a hanging way, and a channel for sewage to flow through is formed between the bottoms of the biological reaction device and the microfiltration membrane filter tank and the bottom of the filtration and purification tank.
The bottom of the sewage filtering and purifying tank 4 and the bottom of the micro-filtration membrane filtering tank 13 are respectively provided with a water outlet and a sludge outlet. The cleaning water is discharged from the water outlet and then returned to the sewage adjusting tank 1 to enter the biological contact oxidation and microfiltration membrane filtration integrated combined device again for treatment, so that the sewage is circularly treated and utilized. The sludge discharge port is used for discharging sludge deposited at the bottom of the tank to a sludge tank and cleaning the sludge periodically.
A pressure gauge 15 and a flow meter 16 are arranged on the water outlet pipeline 11 behind the self-priming water pump 14.
The aeration device 8 is connected with a Roots blower 10 through an air supply pipeline, and electromagnetic valves 18 are respectively arranged on the air supply pipeline. The lifting water pump 2, the self-priming water pump 14, the cleaning water pump 12, the pressure gauge 15, the flow meter 16, the Roots blower 10, the electromagnetic valve 18 and the first liquid level controller 7 are all connected with a PLC control system 19. A second liquid level controller 3 can be arranged in the sewage adjusting tank, and the second liquid level controller 3 is also connected with a PLC control system 19.
As shown in fig. 3, 4 and 5, the second liquid level controller 3 instructs the lift pump 2 to start and stop through the PLC control system 19, the sewage in the sewage adjusting tank 1 is pumped into the filtering and purifying tank 4 through the lift pump, slowly permeates upward from the bottom of the biological reaction device 6, and is subjected to aerobic biochemical reaction and adsorption filtration treatment in the process of fully contacting with the filler carrier reaction component, so that the concentration of organic matters can be effectively degraded, and nitrogen and phosphorus removal treatment can be performed. Meanwhile, the PLC control system controls the starting and stopping of the Roots blower, the aeration device 8 is started to carry out normal aeration, sewage is oxygenated in advance and then aerated through the filler carrier reaction component, and the speed and the effect of aerobic biochemical reaction are enhanced. The concentration of pollutants in the sewage treated by the biological reaction device for one time is greatly reduced, and the sewage is converted into secondary sewage which has good biodegradability and can reduce the pollution to the micro-filtration membrane core assembly, so that the oxygen transmission efficiency of the micro-filtration membrane core assembly is improved, the oxygen supply power consumption is reduced, and the power consumption of the sewage in a treatment unit is reduced. After the secondary sewage enters a microfiltration membrane core filter tank, pollutants with the particle size of more than 0.1-25 mu m are intercepted through membrane separation.
Sewage treated by the biological reaction device enters the micro-filtration membrane filter tank 13 through the water holes 6.3.1 of the enclosing plate, pollutants in the water are deeply treated and filtered through the micro-filtration membrane core assembly to obtain primary clean water, and the primary clean water is pumped into the clean water tank 17 through the self-priming water pump 14 and the water pumping pipeline 13.2, so that ordered continuous and plug-flow progressive advanced treatment on the sewage is realized. Chlorine dioxide, sodium hypochlorite, sodium dichloroisocyanurate and other disinfectants are put into the clean water tank, bacteria such as escherichia coli and the like in the water are killed, and the standard clean water which can be discharged is obtained.
The PLC control system 19 of the invention can monitor the working condition of the system in real time and carry out automatic control. When the filler carrier reaction assembly and the micro-filtration membrane core assembly 13.1 are seriously blocked, the pressure gauge 15 and the flow meter 16 on the water outlet pipeline can transmit pressure and flow information to the PLC control system, the PLC control system controls the start and stop of the cleaning water pump 12, the water pumping from the micro-filtration membrane filter tank is stopped, the water in the clean water tank is pumped to the cleaning water pipe, and the filler carrier reaction assembly and the micro-filtration membrane core assembly 13.1 are cleaned. PLC control system 19 promotes water pump 2 through the information control of second liquid level controller 3 transmission and opens and close to the water level of control sewage equalizing basin, the information control self priming water pump 14 through the transmission of first liquid level controller 7 opens and close, thereby the water level of control sewage filtration purification pond 4.
The system is particularly suitable for small and medium-sized sewage treatment plants with small sewage treatment capacity, and can efficiently and stably carry out standard treatment on sewage and wastewater with medium and small-sized sewage treatment capacity.
Claims (4)
1. The sewage treatment method combining biological contact oxidation and microfiltration membrane filtration is characterized by comprising the following steps:
s1, treating sewage by using a biological contact oxidation device, and performing primary treatment on the sewage through aerobic biochemical reaction, adsorption and filtration to remove partial sludge and harmful substances in the wastewater;
s2, performing secondary treatment on the sewage subjected to the primary treatment by adopting a microfiltration membrane separation and filtration device, and further removing residual sludge and harmful substances in the sewage to obtain primary clear water;
s3, sterilizing the primary clear water to obtain dischargeable clear water reaching the standard;
and S4, pumping part of clear water reaching the standard back to the biological contact oxidation device and the micro-filtration membrane separation and filtration device respectively, cleaning the biological contact oxidation device and the micro-filtration membrane separation and filtration device, and discharging the cleaned sludge and sewage out of the biological contact oxidation device and the micro-filtration membrane separation and filtration device.
2. The sewage treatment system for realizing the sewage treatment method of claim 1, comprising a sewage conditioning tank (1), a biological contact oxidation and microfiltration membrane filtration integrated combination device, a clean water tank (17), a water inlet pipeline (9) connecting the sewage conditioning tank and the biological contact oxidation and microfiltration membrane filtration integrated combination device, a lift water pump (2) arranged on the water inlet pipeline and positioned in the sewage conditioning tank (1), a water outlet pipeline (11) connecting the biological contact oxidation and microfiltration membrane filtration integrated combination device and the clean water tank and provided with a self-priming water pump (14), and a cleaning water pipe connecting the clean water tank and the biological contact oxidation and microfiltration membrane filtration integrated combination device, which are arranged in sequence;
the integrated biological contact oxidation and microfiltration membrane filtration combined device comprises a filtration and purification tank (4), a mounting frame (5) and a first liquid level controller (7) which are arranged in the filtration and purification tank, a biological reaction device (6) which is arranged in the middle of the mounting frame, microfiltration membrane filtration tanks (13) which are symmetrically arranged on the front surface and the back surface of the biological reaction device, and an aeration device (8) which is arranged at the bottom of the filtration and purification tank, wherein the water outlet end of a water inlet pipeline (9) is inserted into the filtration and purification tank (4);
the biological reaction device (6) is a group of replaceable filler carrier reaction components arranged on the mounting rack (5), and enclosing plates (6.3) enclosing the periphery of the filler carrier reaction components; the filler carrier reaction assembly comprises two vertical pipes (6.1) which are symmetrically arranged and have opposite notches, two layers of screen plates (6.2) of which two ends are inserted into the notches, and filler filled in an inner cavity between the two layers of screen plates, wherein gaps are reserved between the two ends of the outer surface of each screen plate and the notches of the vertical pipes;
a replaceable microfiltration membrane core assembly (13.1) is arranged in the microfiltration membrane filter tank (13), the inner side tank wall of the microfiltration membrane filter tank is a front enclosing plate and a rear enclosing plate of the filler carrier reaction assembly, water passing holes (6.3.1) are distributed on the front enclosing plate and the rear enclosing plate, water pumping pipelines (13.2) are inserted at two sides of the microfiltration membrane filter tank, and the water pumping pipelines are connected with the water outlet pipeline (11); the microfiltration membrane core assembly (13.1) comprises a support framework (13.1.1) and industrial filter cloth wound on the support framework;
the cleaning water pipe for connecting the clean water tank and the integrated combination device of biological contact oxidation and microfiltration membrane filtration comprises a first group of cleaning water pipes which are led out from the clean water tank and extend into vertical pipes (6.1) at two sides of the filler carrier reaction assembly in two ways, and a second group of cleaning water pipes which are led out from the clean water tank and extend into a supporting framework (13.1.1) of the microfiltration membrane core assembly (13.1), wherein a cleaning water pump (12) is arranged on the cleaning water pipes;
the bottoms of the sewage filtering and purifying tank (4) and the micro-filtration membrane filtering tank (13) are respectively provided with a water outlet and a sludge discharge port;
a pressure gauge (15) and a flow meter (16) are arranged on the water outlet pipeline (11) behind the self-priming water pump (14);
the aeration device (8) is connected with the Roots blower (10) through an air supply pipeline, and an electromagnetic valve (18) is arranged on the air supply pipeline;
the lifting water pump (2), the self-priming water pump (14), the cleaning water pump (12), the pressure gauge (15), the flow meter (16), the Roots blower (10), the electromagnetic valve (18) and the first liquid level controller (7) are all connected with the PLC control system (19).
3. Sewage treatment system according to claim 2, characterised in that a second level controller (3) is arranged in the regulating reservoir (1), the second level controller (3) being connected to a PLC control system (19).
4. The wastewater treatment system according to claim 2, wherein the micro-filtration membrane core assembly (13.1) in the micro-filtration membrane filtration tank is formed by winding industrial filter cloth on a support framework, and the pore diameter of the membrane is 0.1-25 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210966899.7A CN115140908A (en) | 2022-08-11 | 2022-08-11 | Biological contact oxidation and microfiltration membrane filtration combined sewage treatment method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210966899.7A CN115140908A (en) | 2022-08-11 | 2022-08-11 | Biological contact oxidation and microfiltration membrane filtration combined sewage treatment method and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115140908A true CN115140908A (en) | 2022-10-04 |
Family
ID=83416211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210966899.7A Pending CN115140908A (en) | 2022-08-11 | 2022-08-11 | Biological contact oxidation and microfiltration membrane filtration combined sewage treatment method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115140908A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10216795A (en) * | 1997-02-06 | 1998-08-18 | Sanko Seisakusho:Kk | Waste water treatment system for cleaning plant |
| JP2002136985A (en) * | 2000-11-01 | 2002-05-14 | Hitachi Zosen Corp | Water purification equipment |
| CN1611453A (en) * | 2003-10-30 | 2005-05-04 | 中国科学院生态环境研究中心 | Biological contact oxidation film bioreactor |
| CN202208660U (en) * | 2011-09-23 | 2012-05-02 | 汪义恩 | Membrane biological reaction medium and sewage treatment equipment |
| CN103172172A (en) * | 2013-04-15 | 2013-06-26 | 重庆大学 | Up-flow solid carbon source biofilm carrier denitrification bioreactor |
| CN203402993U (en) * | 2013-08-06 | 2014-01-22 | 常州友达环保科技有限公司 | External two-stage membrane bioreactor |
| CN204981497U (en) * | 2015-07-22 | 2016-01-20 | 南宁市桂润环境工程有限公司 | Handle two membrane inner loop bioreaction system of low concentration organic waste water |
| CN208802964U (en) * | 2018-07-06 | 2019-04-30 | 云南世诚环境技术有限公司 | A kind of Hybrid Biofilm Reactor and bioreactor sewage and wastewater treatment system |
| CN209267525U (en) * | 2018-12-14 | 2019-08-16 | 青海水利水电集团共和光伏发电有限公司 | A kind of photovoltaic home system automatically cleaning module frame |
-
2022
- 2022-08-11 CN CN202210966899.7A patent/CN115140908A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10216795A (en) * | 1997-02-06 | 1998-08-18 | Sanko Seisakusho:Kk | Waste water treatment system for cleaning plant |
| JP2002136985A (en) * | 2000-11-01 | 2002-05-14 | Hitachi Zosen Corp | Water purification equipment |
| CN1611453A (en) * | 2003-10-30 | 2005-05-04 | 中国科学院生态环境研究中心 | Biological contact oxidation film bioreactor |
| CN202208660U (en) * | 2011-09-23 | 2012-05-02 | 汪义恩 | Membrane biological reaction medium and sewage treatment equipment |
| CN103172172A (en) * | 2013-04-15 | 2013-06-26 | 重庆大学 | Up-flow solid carbon source biofilm carrier denitrification bioreactor |
| CN203402993U (en) * | 2013-08-06 | 2014-01-22 | 常州友达环保科技有限公司 | External two-stage membrane bioreactor |
| CN204981497U (en) * | 2015-07-22 | 2016-01-20 | 南宁市桂润环境工程有限公司 | Handle two membrane inner loop bioreaction system of low concentration organic waste water |
| CN208802964U (en) * | 2018-07-06 | 2019-04-30 | 云南世诚环境技术有限公司 | A kind of Hybrid Biofilm Reactor and bioreactor sewage and wastewater treatment system |
| CN209267525U (en) * | 2018-12-14 | 2019-08-16 | 青海水利水电集团共和光伏发电有限公司 | A kind of photovoltaic home system automatically cleaning module frame |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102580544B (en) | High-flux contamination-resisting type flat membrane bioreactor and flat MBR (Membrane Bioreactor) device | |
| CN101481174B (en) | V shaped groove type microgrid component capable of continuously on-line updating dynamic membrane and use method thereof | |
| CN103496784B (en) | A kind of self-forming dynamic membrane bioreactor using aerobic particle mud | |
| CN101434444B (en) | Membrane bioreactor and use thereof in wastewater treatment | |
| CN103466876A (en) | External double-stage membrane bioreactor | |
| CN112759078A (en) | Integrated sewage treatment device and method | |
| CN203402993U (en) | External two-stage membrane bioreactor | |
| CN101417187A (en) | Automatic back-flush, regeneration filter | |
| CN105129974A (en) | Reciprocating rotary type membrane bioreactor | |
| CN208802964U (en) | A kind of Hybrid Biofilm Reactor and bioreactor sewage and wastewater treatment system | |
| CN102963972B (en) | Continuous circulating pipe membrane bioreactor | |
| CN213493001U (en) | Full-automatic external-pressure internal-suction type membrane filtration system | |
| CN220165962U (en) | Sewage treatment system with external MBR membrane module of gas stripping circulation | |
| CN115140908A (en) | Biological contact oxidation and microfiltration membrane filtration combined sewage treatment method and system | |
| CN207775020U (en) | A kind of submerged hollow fibre membrane module in bioreactor and petrochemical wastewater processing system | |
| CN202465450U (en) | Treatment device of electroplating pretreatment waste water | |
| CN201390676Y (en) | Micro-mesh dynamic membrane bioreactor with continuous renewal of dynamic membrane | |
| CN115140907A (en) | Sewage treatment method and system combining biological contact oxidation and MBR (membrane bioreactor) and microfiltration membrane filtration | |
| CN115180778A (en) | Biological contact oxidation and MBR (membrane bioreactor) filtration combined sewage treatment method and system | |
| CN112090281B (en) | Fully automatic external pressure internal suction membrane filtration system and its filtration process | |
| CN214457104U (en) | Modular membrane bioreactor unit bundle device | |
| CN108773985B (en) | Sewage and wastewater treatment method by composite biofilm method and bioreactor | |
| CN108773986B (en) | Sewage and wastewater treatment method of cloth bioreactor and microfiltration membrane filter | |
| CN114436472A (en) | Movable advanced sewage treatment system based on embedded microorganism construction method | |
| CN218665573U (en) | External sewage treatment device without aeration jitter for MBR (membrane bioreactor) membrane group device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |