CN103755023A - Novel immobilized microorganism biochemical precipitation integrated reactor - Google Patents

Abstract

The invention discloses a novel immobilized microorganism biochemical precipitation integrated reactor. The novel immobilized microorganism biochemical precipitation integrated reactor comprises a stirrer, a suspended filler, an immobilized filler, baffling plates, aerobic zone baffle plates, precipitation zone baffle plates, effluent weirs, effluent troughs, an effluent well, an effluent pipe, a mud scraper, a nitrifying liquid reflux device, a mud storage zone, a sludge reflux device, a water inlet pipe, an anaerobic biochemical reaction zone, an anoxic biochemical reaction zone, an aerobic biochemical reaction zone, a radial flow precipitation zone, and an aeration system. According to the novel immobilized microorganism biochemical precipitation integrated reactor, a concentric circle typed pond structure is adopted; design is reasonable; the structure is compact; anaerobic treatment, anoxic treatment, and aerobic treatment are combined, and immobilized microorganism technology is also adopted, so that degradation and removing of characteristic pollutants are improved, biochemical treatment efficiency is increased, treatment efficiency is high, precipitation effect is excellent, investment and operation cost is low, occupied land area is reduced, and economic benefits are increased. The novel immobilized microorganism biochemical precipitation integrated reactor is suitable for treatment of domestic sewage and industrial wastewater, and especially suitable for treatment of industrial wastewater containing pollutants which are difficult to degrade.

Description

A new integrated biochemical precipitation reactor for immobilized microorganisms

technical field

The invention belongs to the field of sewage treatment, and relates to a sewage treatment reactor, in particular to a novel integrated biochemical precipitation reactor for immobilized microorganisms.

Background technique

In recent years, technicians have gradually realized that the integration and equipment of the biochemical treatment unit and the physical and chemical treatment unit can greatly reduce the investment in infrastructure and pipeline equipment, which is an economical, efficient, and land-occupying process requirement. The development of sedimentation and clarification integrated treatment reactor has become an inevitable trend in the development of sewage treatment reactors.

Since the use of immobilized cell technology to treat cyanide-containing wastewater in the mid-1970s, scholars at home and abroad have done a lot of research on the treatment of various types of wastewater with immobilized microorganisms. Immobilized microbial technology refers to a method that restricts or locates biocatalysts such as enzymes, microbial cells, animal and plant cells, and organelles in a specific space by physical or chemical methods, retains part of their catalytic activity, and can be used repeatedly and continuously. . The development and application of immobilized microorganism technology has also created space for the improvement of biochemical efficiency of sewage treatment reactors.

At present, the existing biochemical treatment and precipitation clarification integrated treatment reactors on the market adopt various types, among which the concentric circle type is relatively novel. The concentric circle type breaks the conventional rectangular reactor type and has some unique characteristics of its own. Chinese patent CN201020631729.6 is an integrated sewage treatment sedimentation combined reactor, the anaerobic zone, the anoxic zone, and the aerobic zone are not relatively independent, and the microorganisms in it have no relative phase separation. The inclined plate sedimentation is adopted, and the sedimentation effect Not very good; Chinese patent ZL200510057464.7 integrated multi-stage biofilm sewage treatment equipment, the pool body of this invention is composed of four concentric circles, in which the outer ring is divided into different reaction zones by partitions, aerobic and anaerobic Alternate operation, the anaerobic zone, the anoxic zone, and the aerobic zone do not exclusively occupy a concentric ring, and the function of the concentric circle type and the characteristics of the hydraulic load of the outer ring becoming smaller and the water distribution uniform are not realized. The sedimentation zone is placed in the The inner ring does not meet the requirement of maximum required volume. The above patents also do not strengthen the immobilization of microorganisms, so the efficiency of biochemical treatment is not high.

In order to solve the above problems, scientific research units and enterprise scientific and technical personnel are constantly researching, exploring, and improving the existing biochemical treatment and precipitation clarification integrated treatment reactor, hoping to design an integrated reaction with high biochemical efficiency and good precipitation effect device.

Contents of the invention

The object of the present invention is to overcome the above disadvantages and provide an integrated biochemical precipitation reactor for immobilized microorganisms. The reactor adopts concentric circle pool type, reasonable design, compact structure, combined application of anaerobic, anoxic, and aerobic treatment, adopts immobilized microbial technology in anaerobic, anoxic, and aerobic areas, and strengthens biochemical treatment. It has the characteristics of high biochemical treatment efficiency, good sedimentation effect, low energy consumption, and low investment and operation costs, which saves the occupied area and improves economic benefits.

The technical solution adopted by the present invention to solve the technical problem is: a novel biochemical sedimentation integrated reactor for immobilized microorganisms, which contains agitator, fixed filler, suspended filler, baffle plate, aerobic zone baffle, sedimentation zone baffle Plate, outlet weir, outlet tank, outlet well, outlet pipe, mud scraper, nitrifying liquid return device, sludge storage area, sludge return device, water inlet pipe, anaerobic biochemical reaction area, anoxic biochemical reaction area, aerobic biochemical reaction area Reaction area, radial flow sedimentation area, and aeration system, characterized by: the anaerobic biochemical reaction area, anoxic biochemical reaction area, aerobic biochemical reaction area, and radial flow sedimentation area of the reactor face outward in sequence, and the overall shape is concentric There is a water outlet weir around the radial flow sedimentation area, an outlet tank is arranged outside the outlet weir, an outlet well is arranged on one side of the outlet tank, and an outlet pipe is arranged on the lower right of the outlet well; an agitator is arranged in the anaerobic biochemical reaction area And suspended packing, fixed on the packing to degrade the dominant anaerobic microorganisms of characteristic pollutants, the anoxic biochemical reaction zone is equipped with baffles and suspended packing, fixed on the packing to degrade the dominant facultative microorganisms of characteristic pollutants, aerobic biochemical The reaction area is equipped with an aerobic area baffle, fixed packing and suspended packing, and the dominant aerobic microorganisms that degrade the characteristic pollutants are fixed on the packing. The lower part of the aerobic biochemical reaction area is equipped with an aeration system. There is a nitrification liquid reflux device between the anoxic biochemical reaction area and the aerobic biochemical reaction area; a mud storage area is provided at the bottom of the reactor, a mud scraper is provided in the mud storage area, and a water inlet pipe is provided below the water inlet pipe. There is a sludge reflux device next to it, forming a new type of biochemical precipitation integrated reactor for immobilized microorganisms.

Preferably, the suspension filler is characterized in that it uses sodium alginate, chitosan, activated carbon, etc. as materials to prepare microcapsules, and the dominant microbial flora is embedded in the microcapsules for fixation. Suspend the microcapsules.

Preferably, the fixed filler is characterized by a film-hanging filler, which fixes the dominant microbial flora on the fixed and suspended fiber mass.

The characteristic pollutants mentioned in the technical proposal refer to organic pollutants that are difficult to biodegrade in sewage, such as organic chlorides commonly found in industrial wastewater.

The technical principle adopted in the present invention is: the reactor adopts the concentric circle type, the pool type is uniform, the occupied area is saved, and the investment and operation cost is low. The inner circle is the anaerobic biochemical reaction zone, the inner middle circle is the anoxic biochemical reaction zone, the outer middle circle is the aerobic biochemical reaction zone, and the outer circle is the radial flow sedimentation zone. In the anaerobic biochemical reaction area, there are stirring reactors and suspended fillers. Wastewater enters the anaerobic biochemical reaction area and is mixed with anaerobic sludge. The stirring reactor preferably uses a stirring speed of 100 rpm to strengthen the mixing of wastewater and sludge. The dominant anaerobic microorganisms that degrade the characteristic pollutants are fixed on the suspended filler, and the refractory organic matter is anaerobically hydrolyzed and acidified to facilitate the removal of phosphorus from the reflux sedimentation sludge. The hydraulic retention time in the anaerobic biochemical reaction zone is 4 to 12 hours. The anoxic biochemical reaction area is equipped with an underwater propeller, and the impeller speed is preferably 120 rpm, so that the mud and water are mixed to form a mixed flow that combines deflection inlet water and side circumferential push flow, and fixes and degrades characteristic pollutants on the suspended filler. Dominant facultative microorganisms further degrade refractory organic matter. A nitrifying liquid reflux device is provided between the anoxic biochemical reaction area and the aerobic biochemical reaction area, and the nitrifying liquid is returned to the anoxic biochemical reaction area to facilitate denitrification. The aerobic biochemical reaction area is equipped with an aeration system, and the effluent from the anoxic biochemical reaction area is diverted into the aerobic biochemical reaction area. The aerobic biochemical reaction area is equipped with fixed packing and suspended packing, and the advantage of fixing and degrading characteristic pollutants on the packing is good. Aerobic microorganisms and aerobic sludge are completely mixed with influent water for aerobic treatment to remove most of the COD and ammonia nitrogen in the sewage, and fully adsorb phosphorus, which is removed through the discharge of the remaining sludge in the sedimentation zone.

The suspension filler is a microcapsule made of sodium alginate, chitosan, activated carbon, etc., and the dominant microbial flora is embedded in it for fixation, and the microcapsule is suspended by agitator and hydraulic flow. Fixed packing, that is, hanging film packing, fixes the dominant microbial flora on the fixed and suspended fiber mass. Combined application of anaerobic, anoxic, and aerobic treatment. Immobilized microbial technology is used in anaerobic, anoxic, and aerobic areas to strengthen biochemical treatment and improve biochemical treatment efficiency.

The hydraulic retention time ratio of the anaerobic biochemical reaction zone, the anoxic biochemical reaction zone and the aerobic biochemical reaction zone is 1:1:2-4. If the reactor is used to treat domestic sewage, the ratio of hydraulic retention time in the three reaction zones is 1:1:3-4; if the reactor is used to treat industrial wastewater, the ratio of hydraulic retention time in the three reaction zones is 1:1:2. The effluent from the biochemical reaction enters the radial flow sedimentation area for mud-water separation, and the water is effluent through the effluent system. The baffled water inlet and outlet are used between each biochemical area to isolate the anaerobic, anoxic and aerobic microorganisms. The water inflow of each biochemical area is radiated outward along a circle, and the water is evenly distributed. The beginning of the next area is treated The load is relatively small compared to the corridor type; each biochemical area is mixed in different ways to form the overall push flow of the biochemical reaction and the mixed flow in each reaction area, and the combined application of anaerobic, anoxic, and aerobic treatments has high treatment efficiency High, low energy consumption, low investment and operation costs. According to the ratio of the hydraulic retention time of the anaerobic zone, the anoxic zone and the aerobic zone, the anaerobic zone, the anoxic zone, and the aerobic zone are surrounded from the inside to the outside according to the size of the required volume, and the radial flow with the largest required volume The sedimentation tank is placed on the outermost circle, and the way of surrounding water inflow and outflow is adopted, so that it has a good sedimentation effect and improves the sedimentation efficiency and effluent water quality.

The beneficial effects of the present invention are:

(1) The reactor adopts concentric circle pool type, reasonable design, compact structure, simple and practical, combined application of anaerobic, anoxic and aerobic treatment, with high treatment efficiency, good sedimentation effect, low energy consumption, low investment and operation The characteristics of low cost save the floor area and improve the economic benefits;

(2) The anaerobic biochemical reaction zone, the anoxic biochemical reaction zone and the aerobic biochemical reaction zone of the present invention all have microencapsulated suspension fillers, and the dominant microorganisms of processing characteristic pollutants that are screened and cultivated are fixed, thereby strengthening characteristic pollution The aerobic biochemical reaction area is also equipped with film-hanging fillers to strengthen the biological treatment effect and improve the efficiency of biochemical treatment.

The reactor provided by the invention is suitable for the treatment of domestic sewage and industrial wastewater, especially the treatment of industrial wastewater containing characteristic pollutants.

Description of drawings

Below is further description of the present invention in conjunction with accompanying drawing and embodiment:

Fig. 1 is a sectional view of a novel immobilized microbial biochemical precipitation integrated reactor,

Fig. 2 is a plan view of a novel biochemical precipitation integrated reactor for immobilized microorganisms.

In Figures 1 and 2: agitator 1, suspended packing 2, baffle plate 3, aerobic zone baffle 4, sedimentation zone baffle 5, outlet weir 6, outlet tank 7, outlet well 8, outlet pipe 9, Sludge scraper 10, nitrifying liquid reflux device 11, sludge storage area 12, sludge reflux device 13, water inlet pipe 14, anaerobic biochemical reaction area 15, anoxic biochemical reaction area 16, aerobic biochemical reaction area 17, radial flow sedimentation Zone 18, aeration system 19, fixed packing 20.

Detailed ways

In Figures 1 and 2: the anaerobic biochemical reaction zone 15, the anoxic biochemical reaction zone 16, the aerobic biochemical reaction zone 17, and the radial flow sedimentation zone 18 of the reactor are outward in sequence, and the whole is concentric; the radial flow sedimentation Area 18 is provided with water outlet weir 6 around, and the outside of water outlet weir 6 is provided with water outlet tank 7, and one side of water outlet tank 7 is provided with water outlet well 8, and the bottom right of water outlet well 8 is provided with outlet pipe 9; Anaerobic biochemical reaction zone 15 There are agitator 1, suspended packing 2, anoxic biochemical reaction zone 16 is equipped with baffle plate 2, suspended packing 2, aerobic biochemical reaction zone 17 is equipped with aerobic zone baffle 4, suspended packing 2, aeration system 19. Fixed packing 20, radial flow sedimentation area 18 is provided with sedimentation area baffle 5, nitrifying liquid reflux device 11 is provided between anoxic biochemical reaction area 16 and aerobic biochemical reaction area 17; the bottom of the reactor is provided with mud deposit Area 12, mud storage area 12 is equipped with a mud scraper 10, a water inlet pipe 14 is arranged below, and a sludge reflux device 13 is arranged next to the water inlet pipe 14, forming a new integrated biochemical sedimentation reactor for immobilized microorganisms.

The reactor adopts the concentric circle type, the pool type is unified, the floor area is saved, and the investment and operation cost is low. The inner circle is an anaerobic biochemical reaction zone 15, the inner middle circle is an anoxic biochemical reaction zone 16, the outer middle circle is an aerobic biochemical reaction zone 17, and the outer circle is a radial flow sedimentation zone 18. An agitator 1 and a suspension filler 2 are arranged in the anaerobic biochemical reaction zone 15, and the waste water enters the anaerobic biochemical reaction zone 15 to be mixed with anaerobic sludge. Strengthen the mixing, fix the dominant anaerobic microorganisms that degrade the characteristic pollutants on the suspended filler, and perform anaerobic hydrolysis and acidification on the refractory organic matter, so as to facilitate the removal of phosphorus from the reflux sedimentation sludge. The hydraulic retention time of the anaerobic biochemical reaction zone 15 is 4-12 hours. The anoxic biochemical reaction zone 16 is equipped with an underwater propeller, and the impeller speed is preferably 120 rpm, so that the muddy water mixes to form a mixed flow combining baffled water intake and side circumferential push flow. The dominant facultative microorganisms that degrade characteristic pollutants are immobilized on the suspended filler, and the refractory organic matter is further degraded. A nitrifying liquid reflux device 11 is provided between the anoxic biochemical reaction zone 16 and the aerobic biochemical reaction zone 17, and the nitrifying liquid is returned to the anoxic biochemical reaction zone to facilitate denitrification. Aerobic biochemical reaction zone 17 is provided with aerobic zone baffle 4, suspended packing 2, aeration system 19, fixed packing 20, anoxic biochemical reaction zone 16 effluent flow into aerobic biochemical reaction zone 17, aerobic sludge and The influent water is completely mixed, and the dominant aerobic microorganisms that degrade the characteristic pollutants are fixed on the filler for aerobic treatment. The suspension filler is a microcapsule made of sodium alginate, chitosan, activated carbon, etc., and the dominant microbial flora is embedded in it for fixation, and the microcapsule is suspended by agitator and hydraulic flow. The fixed filler adopts the hanging film filler, and the dominant microbial flora is fixed on the fixed and suspended fiber mass.

The hydraulic retention time ratio of the anaerobic biochemical reaction zone 15, the anoxic biochemical reaction zone 16 and the aerobic biochemical reaction zone 17 is 1:1:2-4. If the reactor is used to treat domestic sewage, the ratio of hydraulic retention time in the three reaction zones is 1:1:3-4; if the reactor is used to treat industrial wastewater, the ratio of hydraulic retention time in the three reaction zones is 1:1:2. The effluent from the biochemical reaction enters the radial flow sedimentation zone 18 for separation of mud and water, and is effluent through the effluent system. The baffled water inlet and outlet are used between each biochemical area to isolate the anaerobic, anoxic and aerobic microorganisms. The water inflow of each biochemical area is radiated outward along a circle, and the water is evenly distributed. The beginning of the next area is treated The load is relatively small compared to the corridor type; each biochemical area is mixed in different ways to form the overall push flow of the biochemical reaction and the mixed flow in each reaction area, and the combined application of anaerobic, anoxic, and aerobic treatments has high treatment efficiency High, low energy consumption, low investment and operation costs. According to the ratio of the hydraulic retention time of the anaerobic zone, the anoxic zone and the aerobic zone, the anaerobic zone, the anoxic zone, and the aerobic zone are surrounded from the inside to the outside according to the size of the required volume, and the radial flow with the largest required volume The sedimentation tank is placed on the outermost circle, and the way of surrounding water inflow and outflow is adopted, so that it has a good sedimentation effect and improves the sedimentation efficiency and effluent water quality.

Claims (4)

1. A new integrated reactor for immobilized microbial biochemical precipitation, including agitator, fixed packing, suspended packing, baffle plate, aerobic zone baffle, sedimentation zone baffle, outlet weir, outlet tank, outlet well, Outlet pipe, mud scraper, nitrifying liquid reflux device, sludge storage area, sludge reflux device, water inlet pipe, anaerobic biochemical reaction area, anoxic biochemical reaction area, aerobic biochemical reaction area, radial flow sedimentation area, aeration system , which is characterized in that: the anaerobic biochemical reaction zone, anoxic biochemical reaction zone, aerobic biochemical reaction zone, and radial flow sedimentation area of the reactor face outward in sequence, and the overall shape is concentric; there are outlet weirs around the radial flow sedimentation area , the outside of the outlet weir is provided with an outlet tank, one side of the outlet tank is provided with an outlet well, and the lower right of the outlet well is provided with an outlet pipe; the anaerobic biochemical reaction area is equipped with agitator and suspended packing, and the degradation characteristic pollution is fixed on the filler The anoxic biochemical reaction area is equipped with baffles and suspended fillers, and the dominant facultative microorganisms that degrade characteristic pollutants are fixed on the fillers. The aerobic biochemical reaction area is equipped with aerobic zone baffles, fixed Packing and suspended packing, the dominant aerobic microorganisms that degrade the characteristic pollutants are fixed on the packing, the aeration system is set in the lower part of the aerobic biochemical reaction area, the sedimentation area baffle is set in the radial flow sedimentation area, the anoxic biochemical reaction area and the aerobic biochemical reaction area There is a nitrifying liquid reflux device between the reaction zones; a sludge storage area is provided at the bottom of the reactor, a sludge scraper is provided in the sludge storage area, a water inlet pipe is provided below, and a sludge reflux device is provided next to the water inlet pipe, forming a A novel biochemical precipitation integrated reactor for immobilized microorganisms. 2. The reactor according to claim 1, characterized in that: the suspended filler is a microcapsule prepared by using sodium alginate, chitosan, activated carbon, etc., and the dominant microbial flora is embedded in the microcapsule. The microcapsules are fixed in the capsule, and the microcapsules are in a suspended state by means of a stirrer and hydraulic flow. 3. The reactor according to claim 1, characterized in that: said fixed packing is characterized in that film-hanging packing is used to fix the dominant microbial flora on the fixed and suspended fiber mass. 4. The reactor according to claim 1, characterized in that: said characteristic pollutants are organic pollutants that are difficult to biodegrade in sewage, such as organic chlorides commonly found in industrial wastewater.

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