CN111847780A - Sewage treatment process - Google Patents
Sewage treatment process Download PDFInfo
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- CN111847780A CN111847780A CN202010718187.4A CN202010718187A CN111847780A CN 111847780 A CN111847780 A CN 111847780A CN 202010718187 A CN202010718187 A CN 202010718187A CN 111847780 A CN111847780 A CN 111847780A
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- 239000010865 sewage Substances 0.000 title claims abstract description 113
- 238000011282 treatment Methods 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 67
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000007599 discharging Methods 0.000 claims abstract description 45
- 238000004062 sedimentation Methods 0.000 claims abstract description 42
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 230000003647 oxidation Effects 0.000 claims abstract description 17
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 17
- 230000007062 hydrolysis Effects 0.000 claims abstract description 14
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 14
- 230000001105 regulatory effect Effects 0.000 claims abstract description 9
- 230000003197 catalytic effect Effects 0.000 claims abstract description 8
- 239000003814 drug Substances 0.000 claims abstract description 4
- 230000005484 gravity Effects 0.000 claims abstract description 4
- 238000011221 initial treatment Methods 0.000 claims abstract description 4
- 239000002351 wastewater Substances 0.000 claims abstract description 4
- 230000001376 precipitating effect Effects 0.000 claims abstract description 3
- 239000000498 cooling water Substances 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 24
- 239000010802 sludge Substances 0.000 claims description 22
- 239000002912 waste gas Substances 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000004065 wastewater treatment Methods 0.000 claims description 10
- 230000014759 maintenance of location Effects 0.000 claims description 8
- 238000005273 aeration Methods 0.000 claims description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 claims description 6
- 238000005260 corrosion Methods 0.000 claims description 6
- 239000012535 impurity Substances 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 241000283074 Equus asinus Species 0.000 claims description 3
- 238000006555 catalytic reaction Methods 0.000 claims description 3
- 239000003112 inhibitor Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000523 sample Substances 0.000 claims description 3
- 238000003892 spreading Methods 0.000 claims description 3
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 230000003301 hydrolyzing effect Effects 0.000 claims description 2
- 238000007710 freezing Methods 0.000 claims 1
- 230000007613 environmental effect Effects 0.000 abstract description 7
- 238000000746 purification Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000005262 decarbonization Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
- C02F3/28—Anaerobic digestion 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
- C02F3/30—Aerobic and anaerobic processes
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- 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)
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The invention relates to a sewage treatment process, which comprises the following steps: step one, pretreatment and primary treatment: s011, inputting the sewage into a water pump room, and pretreating the sewage through gravity flow; s012, discharging the sewage from the water pump room into a regulating tank; s013, discharging the sewage into a primary sedimentation tank for sedimentation; step two, biochemical treatment: s021, discharging the sewage into an anaerobic hydrolysis tank, wherein the anaerobic hydrolysis tank adopts a head-grid up-flow ABR reactor, and distributes water in a pressure flow manner; s022, discharging the sewage into A2a/O pool; s023, discharging the sewage into a secondary sedimentation tank; step three, deep treatment: s031, the sewage is discharged into the middle pond to carry on the pharmaceutical treatment after precipitating in the secondary sedimentation tank; s032, discharging the sewage into a high-efficiency sedimentation tank, and adding a proper amount of medicament according to water quality; s033, discharging the sewage into an ozone catalytic oxidation tank; s034, discharging the sewage into a reduction tank to remove residual ozone in the wastewater; s035, discharging the sewage intoA biological activated carbon filter; s036, discharging the sewage into a drainage pond. The invention has the advantage of purifying sewage to enhance environmental protection.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a sewage treatment process.
Background
The sewage treatment process is an effective method for various economic, reasonable, scientific and industrial waste water of urban domestic sewage. Sewage treatment is widely applied to various fields such as buildings, agricultural transportation, energy, petrifaction, environmental protection, urban landscape and the like. Especially, industrial sewage is discharged into rivers directly, which causes serious pollution to the environment, and thus the sewage needs to be purified and then discharged.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a sewage treatment process which has the effect of effectively treating sewage to enhance environmental protection.
The above object of the present invention is achieved by the following technical solutions:
a sewage treatment process is characterized by comprising the following steps: step one, pretreatmentAnd (3) treatment and primary treatment: s011, inputting the sewage into a water pump room, and pretreating the sewage through gravity flow; SO12, discharging the sewage from the water pump room into a regulating reservoir, and uniformly mixing the sewage in the regulating reservoir in a submersible stirring manner; s013, discharging the sewage into a primary sedimentation tank for sedimentation; step two, biochemical treatment: s021, after the sewage is precipitated in a primary sedimentation tank, discharging the sewage into an anaerobic hydrolysis tank, wherein the anaerobic hydrolysis tank adopts a head-grid up-flow ABR reactor, and distributes water in a pressure flow manner; s022, discharging the sewage into A2a/O cell, using A2Treating sewage by adopting an O activated sludge process; s023, discharging the sewage into a secondary sedimentation tank for sedimentation again; step three, deep treatment: s031, the sewage is discharged into the middle pond to carry on the pharmaceutical treatment after precipitating in the secondary sedimentation tank; s032, discharging the sewage into a high-efficiency sedimentation tank, and adding a proper amount of medicament according to water quality; s033, discharging the sewage into an ozone catalytic oxidation tank; s034, discharging the sewage into a reduction tank to remove residual ozone in the wastewater; s035, discharging the sewage into a biological activated carbon filter; s036, discharging the sewage into a drainage pond.
By adopting the technical scheme, the whole process starts from water inlet and sequentially passes through the water pump room, the regulating tank, the primary settling tank, the anaerobic hydrolysis tank and the A2The/0 tank, the secondary sedimentation tank, the intermediate water tank, the high-efficiency sedimentation tank, the ozone catalytic oxidation tank, the biological activated carbon filter tank and the discharge water tank are used for treating sewage, so that the sewage reaches the safe discharge standard and is beneficial to environmental protection.
The invention is further configured to: the following steps are added in the step one: and S010, controlling the sewage to enter in time-sharing mode, and monitoring the sewage discharged by each enterprise in real time.
Through adopting above-mentioned technical scheme, carry out the processing of sewage by time-sharing, efficiency is high-efficient, and the operation is orderly, arranges rationally, is favorable to the normal production of each enterprise.
The invention is further configured to: the following steps are added in the step S011: s0111, a grid plate is additionally arranged in a pipeline for discharging sewage into a water pump room so as to block large-particle impurities in the sewage.
Through adopting above-mentioned technical scheme, carry out the separation through the grid board to large granule impurity in the sewage, reduce the doping of large granule impurity in the sewage, be favorable to the purification treatment of follow-up sewage.
The invention is further configured to: the following steps are added in the step S021: s0211, hydrolyzing the sewage in the anaerobic hydrolysis to generate a large amount of waste gas, and discharging the waste gas into a waste gas treatment device in a negative pressure suction and guide mode to be purified and then discharged into the atmosphere.
Through adopting above-mentioned technical scheme, sewage produces a large amount of waste gases after hydrolysising in anaerobic hydrolysis, discharges after carrying out purification treatment to waste gas, is favorable to environmental protection.
The invention is further configured to: in the step 022, the phosphorus and carbon removal reaction is completed by adopting an environment in which an anaerobic tank, an anoxic tank and an aerobic tank are alternately changed, the anaerobic tank, the anoxic tank and the aerobic tank are respectively arranged, different reaction conditions are provided for phosphorus removal and carbon removal in the anaerobic section and the anoxic section (the dissolved oxygen in the anaerobic tank is controlled to be below 0.4mg/l, and the dissolved oxygen in the aerobic tank is controlled to be 1-5 mg/l), and a common reaction condition is provided in the last aerobic section.
By adopting the technical scheme, the dephosphorization and decarbonization reaction is completed by adopting the environment of alternating change of the anaerobic tank, the anoxic tank and the aerobic tank, different reaction conditions are provided for dephosphorization and denitrification in the anaerobic section and the anoxic section, common reaction conditions are provided in the last aerobic section, and the contradiction of dephosphorization and denitrification is well solved by simple combination.
The invention is further configured to: HRT =36.2h for total A2/O tank residence time, wherein the anaerobic section residence time is 4.1h, the anoxic section residence time is 9.3h, and the aerobic section residence time is 22.8 h.
By adopting the technical scheme, the sewage treatment time of each stage is controlled within a reasonable range, and the sewage is fully purified.
The invention is further configured to: the aerobic tank adopts an aeration mode of air floating pipe type micropore aeration.
By adopting the technical scheme, the aerobic tank adopts a micropore aeration mode, which is beneficial to improving the content of dissolved oxygen in the aerobic tank.
The invention is further configured to: in the step S033, the specific operation steps of performing oxidation catalysis on the sewage are as follows:
a, a cooling water system: internal circulation cooling water: opening all valves of a circulating water path and filling cooling water (the water quality requirement of the cooling water must meet the requirement, and if the environmental temperature is lower than 0 ℃ or the corrosion is serious, adding an antifreezing solution or a corrosion inhibitor into the cooling water); secondly, opening a water adding exhaust valve of the heat exchanger, which is arranged at the highest point of the ozone generator, and closing the heat exchanger after the water uniformly flows out of the exhaust valve for 5 min; thirdly, after the system is ensured to be filled with water, a cooling water pump is started; checking that the pipeline is connected perfectly without leakage, and the pressure is less than 2kg/cm 2; fourthly, the valve is slowly adjusted to ensure that the metal rotameter is within the specified flow; external circulation cooling water: checking an external circulating water Y-shaped filter, and turning on an external circulating water pump; observing that the water pressure of the flowmeter meets the requirement; observing the temperature probe, and monitoring the temperature of the external circulating cooling water; b, debugging an air source: firstly, the gas source equipment comprises a liquid oxygen tank, an evaporator and a pressure reducing and stabilizing device, and a professional gas source manufacturer debugs and handles corresponding use certificates before the operation; manually opening a manual valve along the air source process; observing the normal signals of the pressure, the flow, the alarm switch and the valve along the path of the air source process; fourthly, the filter element verifies the signal and stability of the temperature transmitter; c, turning on a power supply of the ozone generator: directly starting and adjusting the running voltage and frequency in a display panel on the power cabinet, and adjusting the donkey to a resonance state by converting the power frequency; controlling parameters such as ozone yield and concentration according to actual field requirements; observing the water temperature of inlet and outlet cooling water; d, starting an ozone tail gas destructor: opening the ozone tail gas destructor, observing the concentration of gas at the outlet of the tail gas destructor on the ozone leakage alarm instrument, and ensuring that the concentration of ozone at the outlet is less than 0.12mg/l and all the gas reaches the gas emission standard; e, opening a circulating water pump in the ozone oxidation pond: opening a manual valve on a pipeline of the internal circulating water pump; when the liquid level rises to 1m away from the bottom liquid level, a circulating water pump in the ozone oxidation tank is started; and f, calculating the output of the required ozone generator according to the total amount of the effluent of the high-efficiency sedimentation tank and the ozone adding amount of 48mg/l, uniformly spreading the output on one to two ozone generators, and gradually starting the three ozone generators according to the amount of the required ozone generator.
By adopting the technical scheme, the ozone catalytic oxidation process of the sewage is completed through the operation, the operation is safe and efficient, the sewage is fully treated, and the subsequent treatment of the sewage is facilitated.
The invention is further configured to: the process also comprises the following steps: firstly, sludge treatment is divided into the following three stages: the first stage, sludge concentration: arranging a sludge concentration tank between the primary sedimentation tank and the secondary sedimentation tank; in the second stage, sludge is dehydrated by plate and frame filter pressing; and the third stage, sludge disposal.
Through adopting above-mentioned technical scheme, among the sewage treatment process, produce a large amount of mud constantly, the production of mud for pollutant and sewage separation, thus the completion is to the purification of sewage, so must clear up mud, in order to ensure sewage treatment's normal clear up.
The invention is further configured to: the sludge treatment mode is incineration.
By adopting the technical scheme, the incineration mode is simple and efficient, and the incinerated residue is small and easy to treat.
In conclusion, the beneficial technical effects of the invention are as follows: the whole process starts from water inlet, and sewage is treated by sequentially passing through a water pump room, an adjusting tank, a primary sedimentation tank, an anaerobic hydrolysis tank, an A2/0 tank, a secondary sedimentation tank, an intermediate water tank, a high-efficiency sedimentation tank, an ozone catalytic oxidation tank, a biological activated carbon filter tank and a discharge water tank, so that the safe discharge standard is reached, and the environment protection is facilitated.
Drawings
FIG. 1 is a schematic flow chart of a wastewater treatment process in the example.
FIG. 2 is a schematic flow chart of step one.
FIG. 3 is a schematic diagram of the detailed flow of step two.
FIG. 4 is a schematic diagram of the detailed flow of step three.
FIG. 5 is a schematic flow chart of the catalytic operation of ozone oxidation in the example.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1-5, the disclosed sewage treatment process comprises the following steps:
step one, pretreatment and primary treatment:
s010, controlling the sewage to enter in a time-sharing manner, and independently treating the sewage discharged by each enterprise in a time-sharing manner by adopting a way that one enterprise arranges one pipeline;
s011, lifting the sewage by a lifting pump, inputting the sewage into a water pump room, and pretreating the sewage by gravity flow; the method comprises the following steps that a grid plate is additionally arranged in a pipeline for discharging sewage into a water pump room so as to block large-particle impurities in the sewage and clean the blocked impurities at regular time;
SO12, discharging the sewage from the water pump room into a regulating reservoir, and uniformly mixing the sewage in the regulating reservoir by a submersible mixer in a submersible stirring manner, wherein the water level of the regulating reservoir is lower than 5.5 m;
s013, discharging the sewage into a primary sedimentation tank for sedimentation;
step two, biochemical treatment:
s021, after the sewage is precipitated in a primary sedimentation tank, discharging the sewage into an anaerobic hydrolysis tank, wherein the anaerobic hydrolysis tank adopts a head-grid up-flow ABR reactor, and distributes water in a pressure flow manner; the sewage is hydrolyzed in the anaerobic hydrolysis to generate a large amount of waste gas, the waste gas is discharged into a waste gas treatment device in a negative pressure suction and lead-out mode to be purified and then discharged into the atmosphere, and the waste gas treatment device can select a waste gas purification tower;
s022, discharging the sewage into A2a/O cell, using A2The sewage is treated by the process of the/O activated sludge method, the phosphorus and carbon removal reaction is completed by the environment of the alternate change of an anaerobic tank, an anoxic tank and an aerobic tank, the anaerobic tank, the anoxic tank and the aerobic tank are respectively arranged, different reaction conditions are provided for phosphorus removal and carbon removal in the anaerobic section and the anoxic section (the dissolved oxygen of the anaerobic tank is controlled below 0.4mg/L, the dissolved oxygen of the aerobic tank is controlled at 1-5 mg/L), and a common reaction condition is provided in the last aerobic section; a. the2The total retention time HRT =36.2h of the/O pool, wherein the retention time of the anaerobic section is 4.1h, the retention time of the anoxic section is 9.3h, and the retention time of the aerobic section is 22.8 h; the aerobic tank adopts an aeration mode of air floating pipe type micropore aeration, and an air source is provided for the aerobic tank through an air blower;
s023, discharging the sewage into a secondary sedimentation tank for sedimentation again, wherein the secondary sedimentation tank is provided with two radial sedimentation tanks with central water inlet and peripheral water outlet; meanwhile, a water distribution well is arranged for distributing water;
step three, deep treatment:
s031, the sewage is discharged into the middle water pool through the lift pump after depositing through the secondary sedimentation tank to carry on the purification treatment of the medicament, add the dosing ratio to set up at 500 mg/l;
s032, discharging the sewage into a high-efficiency sedimentation tank;
s033, discharging the sewage into an ozone catalytic oxidation tank, and carrying out oxidation catalysis on the sewage, wherein the specific operation steps are as follows:
a, a cooling water system: internal circulation cooling water: opening all valves of a circulating water path and filling cooling water (the water quality requirement of the cooling water must meet the requirement, and if the environmental temperature is lower than 0 ℃ or the corrosion is serious, adding an antifreezing solution or a corrosion inhibitor into the cooling water); secondly, opening a water adding exhaust valve of the heat exchanger, which is arranged at the highest point of the ozone generator, and closing the heat exchanger after the water uniformly flows out of the exhaust valve for 5 min; thirdly, after the system is ensured to be filled with water, a cooling water pump is started; checking the pipe connection is intact without leakage, and the pressure is less than 2kg/cm2(ii) a Fourthly, the valve is slowly adjusted to ensure that the metal rotameter is within the specified flow;
external circulation cooling water: checking an external circulating water Y-shaped filter, and turning on an external circulating water pump; observing that the water pressure of the flowmeter meets the requirement; observing the temperature probe, and monitoring the temperature of the external circulating cooling water;
b, debugging an air source: firstly, the gas source equipment comprises a liquid oxygen tank, an evaporator and a pressure reducing and stabilizing device, and a professional gas source manufacturer debugs and handles corresponding use certificates before the operation; manually opening a manual valve along the air source process; observing the normal signals of the pressure, the flow, the alarm switch and the valve along the path of the air source process; fourthly, the filter element verifies the signal and stability of the temperature transmitter;
c, turning on a power supply of the ozone generator: directly starting and adjusting the running voltage and frequency in a display panel on the power cabinet, and adjusting the donkey to a resonance state by converting the power frequency; controlling parameters such as ozone yield and concentration according to actual field requirements; observing the water temperature of inlet and outlet cooling water;
d, starting an ozone tail gas destructor: opening the ozone tail gas destructor, observing the concentration of gas at the outlet of the tail gas destructor on the ozone leakage alarm instrument, and ensuring that the concentration of ozone at the outlet is less than 0.12mg/l and all the gas reaches the gas emission standard;
e, opening a circulating water pump in the ozone oxidation pond: opening a manual valve on a pipeline of the internal circulating water pump; when the liquid level rises to 1m away from the bottom liquid level, a circulating water pump in the ozone oxidation tank is started;
f, calculating the output of the required ozone generator according to the total amount of the effluent of the high-efficiency sedimentation tank and the ozone adding amount of 48mg/L, uniformly spreading the output of the required ozone generator on one to two ozone generators, and gradually starting the three ozone generators according to the amount of the required ozone generator;
s034, discharging the sewage into a reduction tank to remove residual ozone in the wastewater;
s035, discharging the sewage into a biological activated carbon filter;
s036, discharging the sewage into a drainage pond.
The process also includes the following steps; the sludge is treated by the following three stages:
the first stage, sludge concentration: arranging a sludge concentration tank, and concentrating the sludge by a concentrator; the tank is positioned between the primary sedimentation tank and the secondary sedimentation tank;
in the second stage, sludge is dehydrated, and the sludge is subjected to filter pressing and dehydration by a filter press through a plate frame;
and the third stage, sludge treatment, wherein the treatment mode is incineration.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. A sewage treatment process is characterized by comprising the following steps:
step one, pretreatment and primary treatment:
s011, inputting the sewage into a water pump room, and pretreating the sewage through gravity flow;
SO12, discharging the sewage from the water pump room into a regulating reservoir, and uniformly mixing the sewage in the regulating reservoir in a submersible stirring manner;
s013, discharging the sewage into a primary sedimentation tank for sedimentation;
step two, biochemical treatment:
s021, after the sewage is precipitated in a primary sedimentation tank, discharging the sewage into an anaerobic hydrolysis tank, wherein the anaerobic hydrolysis tank adopts a head-grid up-flow ABR reactor, and distributes water in a pressure flow manner;
s022, discharging the sewage into A2a/O cell, using A2Treating sewage by adopting an O activated sludge process;
s023, discharging the sewage into a secondary sedimentation tank for sedimentation again;
step three, deep treatment:
s031, the sewage is discharged into the middle pond to carry on the pharmaceutical treatment after precipitating in the secondary sedimentation tank;
s032, discharging the sewage into a high-efficiency sedimentation tank, and adding a proper amount of medicament according to water quality;
s033, discharging the sewage into an ozone catalytic oxidation tank;
s034, discharging the sewage into a reduction tank to remove residual ozone in the wastewater;
s035, discharging the sewage into a biological activated carbon filter;
s036, discharging the sewage into a drainage pond.
2. The wastewater treatment process according to claim 1, characterized in that the following steps are added in the first step:
and S010, controlling the sewage to enter in time-sharing mode, and monitoring the sewage discharged by each enterprise in real time.
3. The wastewater treatment process according to claim 1, characterized in that: the following steps are added in the step S011:
s0111, a grid plate is additionally arranged in a pipeline for discharging sewage into a water pump room so as to block large-particle impurities in the sewage.
4. The wastewater treatment process according to claim 1, characterized in that: the following steps are added in the step S021:
s0211, hydrolyzing the sewage in the anaerobic hydrolysis to generate a large amount of waste gas, and discharging the waste gas into a waste gas treatment device in a negative pressure suction and guide mode to be purified and then discharged into the atmosphere.
5. The wastewater treatment process according to claim 1, characterized in that: in the step 022, the phosphorus and carbon removal reaction is completed by adopting an environment in which an anaerobic tank, an anoxic tank and an aerobic tank are alternately changed, the anaerobic tank, the anoxic tank and the aerobic tank are respectively arranged, different reaction conditions are provided for phosphorus removal and carbon removal in the anaerobic section and the anoxic section (the dissolved oxygen in the anaerobic tank is controlled to be below 0.4mg/l, and the dissolved oxygen in the aerobic tank is controlled to be 1-5 mg/l), and a common reaction condition is provided in the last aerobic section.
6. The wastewater treatment process according to claim 5, characterized in that: a. the2The total retention time HRT =36.2h of the/O pool, wherein the retention time of the anaerobic section is 4.1h, the retention time of the anoxic section is 9.3h, and the retention time of the aerobic section is 22.8 h.
7. The wastewater treatment process according to claim 6, characterized in that: the aerobic tank adopts an aeration mode of air floating pipe type micropore aeration.
8. The wastewater treatment process according to claim 1, characterized in that: in the step S033, the specific operation steps of performing oxidation catalysis on the sewage are as follows:
a, a cooling water system: internal circulation cooling water: opening all valves of the circulating water path to fill cooling water (the quality of the cooling water must meet the requirement, if the environment temperature is lower than 0 ℃ orThe corrosion is serious, and an anti-freezing solution or a corrosion inhibitor must be added into cooling water); secondly, opening a water adding exhaust valve of the heat exchanger, which is arranged at the highest point of the ozone generator, and closing the heat exchanger after the water uniformly flows out of the exhaust valve for 5 min; thirdly, after the system is ensured to be filled with water, a cooling water pump is started; checking the pipe connection is intact without leakage, and the pressure is less than 2kg/cm2(ii) a Fourthly, the valve is slowly adjusted to ensure that the metal rotameter is within the specified flow;
external circulation cooling water: checking an external circulating water Y-shaped filter, and turning on an external circulating water pump; observing that the water pressure of the flowmeter meets the requirement; observing the temperature probe, and monitoring the temperature of the external circulating cooling water;
b, debugging an air source: firstly, the gas source equipment comprises a liquid oxygen tank, an evaporator and a pressure reducing and stabilizing device, and a professional gas source manufacturer debugs and handles corresponding use certificates before the operation; manually opening a manual valve along the air source process; observing the normal signals of the pressure, the flow, the alarm switch and the valve along the path of the air source process; fourthly, the filter element verifies the signal and stability of the temperature transmitter;
c, turning on a power supply of the ozone generator: directly starting and adjusting the running voltage and frequency in a display panel on the power cabinet, and adjusting the donkey to a resonance state by converting the power frequency; controlling parameters such as ozone yield and concentration according to actual field requirements; observing the water temperature of inlet and outlet cooling water;
d, starting an ozone tail gas destructor: opening the ozone tail gas destructor, observing the concentration of gas at the outlet of the tail gas destructor on the ozone leakage alarm instrument, and ensuring that the concentration of ozone at the outlet is less than 0.12mg/l and all the gas reaches the gas emission standard;
e, opening a circulating water pump in the ozone oxidation pond: opening a manual valve on a pipeline of the internal circulating water pump; when the liquid level rises to 1m away from the bottom liquid level, a circulating water pump in the ozone oxidation tank is started;
and f, calculating the output of the required ozone generator according to the total amount of the effluent of the high-efficiency sedimentation tank and the ozone adding amount of 48mg/L, uniformly spreading the output of the required ozone generator on one to two ozone generators, and gradually starting the three ozone generators according to the amount of the required ozone generator.
9. The wastewater treatment process according to claim 1, further comprising the steps of:
firstly, sludge treatment is divided into the following three stages:
the first stage, sludge concentration: arranging a sludge concentration tank between the primary sedimentation tank and the secondary sedimentation tank;
in the second stage, sludge is dehydrated by plate and frame filter pressing;
and the third stage, sludge disposal.
10. The wastewater treatment process according to claim 9, wherein the sludge is treated by incineration.
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