CN112607960A - Optimization and improvement method for biochemical treatment load in wastewater treatment - Google Patents

Optimization and improvement method for biochemical treatment load in wastewater treatment Download PDF

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CN112607960A
CN112607960A CN202011358307.0A CN202011358307A CN112607960A CN 112607960 A CN112607960 A CN 112607960A CN 202011358307 A CN202011358307 A CN 202011358307A CN 112607960 A CN112607960 A CN 112607960A
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wastewater
aerobic tank
wastewater treatment
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CN112607960B (en
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陈喜巧
苗兵义
莫利明
张权应
霍保明
范军晓
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SHANXI COKING CO Ltd
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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
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • 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
    • C02F1/5281—Installations for water purification using chemical agents
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • 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
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • C02F2101/101—Sulfur 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
    • C02F2101/18—Cyanides
    • 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
    • C02F2209/001—Upstream control, i.e. monitoring for predictive control
    • 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
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • 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
    • C02F2209/07—Alkalinity
    • 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
    • C02F2209/11—Turbidity
    • 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
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • 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
    • C02F3/30—Aerobic and anaerobic 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
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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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)
  • Activated Sludge Processes (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The invention discloses an optimization and improvement method for biochemical treatment load in wastewater treatment, and belongs to the field of wastewater treatment. A method for optimizing and improving biochemical treatment load in wastewater treatment comprises the following steps: sending the wastewater to be treated into an aerobic tank, adding a biological agent into the aerobic tank, arranging an air flotation device in the aerobic tank, wherein the air flotation device comprises two sections, the first section is an aeration section, a perforated aeration pipe is laid at the bottom of the aeration pipe, aeration holes with the diameter of 1.8-2.2mm are formed in the aeration pipe, the second section is a dosing section for adding a flocculating agent and a coagulant, the alkalinity of the aerobic tank is controlled to be 400 plus materials and 600mg/l, and the reflux ratio of a nitrifying liquid is controlled to be 3: 1, controlling the content of the thiocyanide in the inlet water of the regulating reservoir to be below 1000 mg/l. The invention can obviously improve the quality of biochemical effluent and the treated water amount, reduce the system operation pressure and save water resources.

Description

Optimization and improvement method for biochemical treatment load in wastewater treatment
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for optimizing and improving biochemical treatment load in wastewater treatment.
Background
The wastewater treatment is to treat wastewater by physical, chemical and biological methods, so that the wastewater is purified, the pollution is reduced, the wastewater is recycled and reused, water resources are fully utilized, and the biochemical treatment is a common treatment mode in the wastewater treatment.
The total treatment water amount of biochemical treatment in the existing wastewater treatment is low, the production requirement is not met, meanwhile, the quality of biochemical effluent is poor, the cleaning frequency of a deep treatment membrane is increased, the yield of desalted water is low, the impact load resistance capability of a biological system is poor, dilution water is required to be added in the intermediate process, the concentration of biological contact organic matters is reduced, the water amount of the system is increased, after the water quality of future water fluctuates, the system is disordered, the effluent seriously exceeds the standard, the regulation recovery period is long, the COD of the integral effluent is higher than 180 mg/l, the turbidity is 30NTU, the cleaning frequency of a wastewater deep treatment device is high, the backwashing water amount is large, the membrane operation period is short, the yield of desalted water is low, the recovery rate is low, and meanwhile, the treatment water amount needs to be reduced for regulation during the disordered regulation of the system, the vacancy of a regulation pool is.
Disclosure of Invention
The invention aims to provide an optimized method for improving biochemical treatment load in wastewater treatment, so as to solve the problems that the total treatment water amount is low, the production requirement is not met, and the impact load resistance of a biological system is poor in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for optimizing and improving biochemical treatment load in wastewater treatment comprises the following steps: sending the wastewater to be treated into an aerobic tank, adding a biological agent into the aerobic tank, arranging an air flotation device in the aerobic tank, wherein the air flotation device comprises two sections, the first section is an aeration section, a perforated aeration pipe is laid at the bottom of the aeration pipe, aeration holes with the diameter of 1.8-2.2mm are formed in the aeration pipe, the second section is a dosing section for adding a flocculating agent and a coagulant, the alkalinity of the aerobic tank is controlled to be 400 plus materials and 600mg/l, and the reflux ratio of a nitrifying liquid is controlled to be 3: 1, controlling the content of the thiocyanide in the inlet water of the regulating reservoir to be below 1000 mg/l.
Furthermore, the traditional air flotation device adopts air flotation at two ends, is modified into first-stage air flotation for removing light oil, and is characterized in that a perforated aeration pipe is laid at the bottom of the first stage of air flotation for continuous aeration and release of bubbles of 2mm, and the light oil floats upwards and is scraped to remove slag; the second section adds medicine to carry out coagulation reaction, and does not carry out aeration precipitation to carry out slag discharge.
The efficient biological agent adopted by the auxiliary additive is a composite biological agent obtained by combining a plurality of bacillus screened from nature and a single pseudomonas and combining an enzyme preparation prepared from protease, lipase, amylase, urease, cellulase and nitrate reductase in a reasonable proportion, and has a good COD removing effect on the whole, a flocculating agent adopted by the auxiliary additive is an inorganic high-molecular flocculating agent, a coagulating agent adopted by the auxiliary additive is inorganic high-molecular polyaluminium chloride, and the whole performance-price ratio is high.
The ammonia nitrogen regulation index of the aerobic tank is increased, the PH value is controlled to be about 8 when ammonia nitrogen is removed, the PH value is replaced by introducing alkalinity control, and the alkalinity is controlled to be 400-600mg/l, so that the efficient implementation of the nitration reaction can be ensured.
The flocculant is an inorganic polymeric flocculant, and the coagulant is inorganic polymeric polyaluminium chloride.
The main facilities and liquid of the invention comprise an aerobic tank, an anoxic tank, a secondary sedimentation tank, an air flotation device, a biological system, a wastewater sampling inspection system and an auxiliary additive, wherein the whole aerobic tank is of a tank-type container structure and is a core facility of the method, the air flotation device improves the original two-end aeration into a first-stage aeration, a second-stage dosing inspection, a sludge reflux flowmeter, an anoxic tank water inlet flowmeter and a residual sludge discharge flowmeter are arranged in the biological system, the sampling device and the wastewater detection device are main equipment in the wastewater sampling inspection system, and the auxiliary additive adopts a high-efficiency biological agent, a flocculating agent and a coagulant.
Specifically, the invention increases the variety of flora, enhances the activity of the flora, adds the high-efficiency biological agent into an aerobic pool of a key core facility, introduces a plurality of biological flora and simultaneously improves the activity of the biological flora, so that the microorganism can degrade organic matters in the wastewater more efficiently, improves the nitration reaction rate, removes the organic matters efficiently in the biological stage and reduces the adding amount of subsequent chemical agents; performing water quality detection operation, performing a flocculation reagent adding test for multiple times according to water quality, and selecting a high-efficiency and economical reagent, wherein the effluent is light in color and the turbidity is stable at 10 NTU; the improved air floatation device is utilized to carry out normal use work, and organic matters are reduced from the source; the sludge reflux flowmeter, the anoxic tank water inlet flowmeter and the excess sludge discharge flowmeter are additionally arranged in a biological treatment stage, so that eyes are added in a biological system, the flow of sludge and the reflux quantity of supernatant of a secondary sedimentation tank are adjusted in time after the quality of water of incoming water fluctuates, the index of the biological system is guaranteed, excess sludge is discharged in time according to the operation of the system and the condition of the sludge, the microbial flora in the sludge is kept in a logarithmic growth period, and higher sludge activity is kept; through wastewater monitoring, the dosage is increased in time at the air flotation source, organic matters are reduced, the water quality entering a biochemical system is stabilized, and the fluctuation impact of the water quality is avoided; optimizing indexes, increasing the alkalinity analysis indexes of the aerobic pool, controlling the alkalinity of the aerobic pool to 400-600mg/l, and controlling the reflux ratio of the nitrifying liquid to 3: 1, controlling the content of the thiocyanide in the inlet water of the regulating reservoir to be below 1000 mg/l.
Compared with the prior art, the invention has the beneficial effects that: the pretreatment air flotation device at the source is improved, light oil floats upwards to scrape slag and is removed, then the agent is added for coagulation reaction, non-aeration precipitation is carried out for deslagging, organic matters are reduced from the source, the activity of flora is enhanced by increasing the variety of flora, the degradation of the organic matters in the wastewater by microorganisms is more efficient, the nitration reaction rate is improved, the organic matters are efficiently removed at a biological stage, the adding amount of subsequent chemical agents is reduced, the microbial flora in the sludge is kept in a logarithmic growth period, higher sludge activity is kept, the quality of biochemical effluent is improved, the treatment water quantity is improved, the conditions restricting coking and dry quenching coking operation are greatly improved, the balance of a wastewater system is optimized to the maximum extent, the operation pressure of a subsequent advanced wastewater treatment membrane device can be reduced in the whole treatment process, the service life of a membrane is prolonged, and the recovery rate of produced water is improved, and water resources are saved.
In conclusion, the invention can obviously improve the quality of biochemical effluent and the quantity of treated water, reduce the operation pressure of the system and save water resources.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The method for optimizing and improving the biochemical treatment load in the wastewater treatment is realized by the following steps:
the method comprises the following steps: increasing the variety of floras to enhance the activity of the floras, adding 460t of high-efficiency biological agent into an aerobic tank of a key core facility, introducing various biological floras and improving the activity of the biological floras, so that the microorganisms can degrade organic matters in the wastewater more efficiently, the nitration reaction rate is improved, the organic matters are removed efficiently in the biological stage, and the adding amount of subsequent chemical agents is reduced;
step two: performing water quality detection operation, performing a flocculation reagent adding test for multiple times according to water quality, and selecting a high-efficiency and economical reagent, wherein the effluent is light in color and the turbidity is stable at 10 NTU;
step three: the improved primary air floatation device is utilized to carry out normal use work, and organic matters are reduced from the source;
step four: the sludge reflux flowmeter, the anoxic tank water inlet flowmeter and the excess sludge discharge flowmeter are additionally arranged in a biological treatment stage, so that eyes are added in a biological system, the flow of sludge and the reflux quantity of supernatant of a secondary sedimentation tank are adjusted in time after the quality of water of incoming water fluctuates, the index of the biological system is guaranteed, excess sludge is discharged in time according to the operation of the system and the condition of the sludge, the microbial flora in the sludge is kept in a logarithmic growth period, and higher sludge activity is kept;
step five: the method has the advantages that the wastewater monitoring is enhanced, the wastewater is randomly inspected at irregular intervals, abnormal wastewater is found and reported and adjusted in time, the abnormal wastewater receiving amount is reduced, the received abnormal wastewater is guided into an accident pool in time, the dosage is increased in time at the air flotation source, organic matters are reduced, the water quality entering a biochemical system is stabilized, and the water quality fluctuation impact is avoided;
step six: optimizing indexes, increasing the alkalinity analysis indexes of the aerobic tank, controlling the alkalinity of the aerobic tank at 400mg/l, and controlling the reflux ratio of nitrifying liquid at 3: 1, controlling the content of thiocyanide in inlet water of an adjusting tank to be below 1000 mg/l;
obtaining an optimized method for improving biochemical treatment load in wastewater treatment according to the first embodiment;
example two
The method for optimizing and improving the biochemical treatment load in the wastewater treatment is prepared by the following steps:
the method comprises the following steps: increasing the variety of floras to enhance the activity of the floras, adding 440t of high-efficiency biological agent into an aerobic tank of a key core facility, introducing various biological floras and improving the activity of the biological floras, so that the microorganisms can degrade organic matters in the wastewater more efficiently, the nitration reaction rate is improved, the organic matters are removed efficiently in the biological stage, and the adding amount of subsequent chemical agents is reduced;
step two: performing water quality detection operation, performing a flocculation reagent adding test for multiple times according to water quality, and selecting a high-efficiency and economical reagent, wherein the effluent is light in color and the turbidity is stable at 10 NTU;
step three: the improved primary air floatation device is utilized to carry out normal use work, and organic matters are reduced from the source;
step four: the sludge reflux flowmeter, the anoxic tank water inlet flowmeter and the excess sludge discharge flowmeter are additionally arranged in a biological treatment stage, so that eyes are added in a biological system, the flow of sludge and the reflux quantity of supernatant of a secondary sedimentation tank are adjusted in time after the quality of water of incoming water fluctuates, the index of the biological system is guaranteed, excess sludge is discharged in time according to the operation of the system and the condition of the sludge, the microbial flora in the sludge is kept in a logarithmic growth period, and higher sludge activity is kept;
step five: the method has the advantages that the wastewater monitoring is enhanced, the wastewater is randomly inspected at irregular intervals, abnormal wastewater is found and reported and adjusted in time, the abnormal wastewater receiving amount is reduced, the received abnormal wastewater is guided into an accident pool in time, the dosage is increased in time at the air flotation source, organic matters are reduced, the water quality entering a biochemical system is stabilized, and the water quality fluctuation impact is avoided;
step six: optimizing indexes, increasing the alkalinity analysis indexes of the aerobic tank, controlling the alkalinity of the aerobic tank at 500mg/l, and controlling the reflux ratio of nitrifying liquid at 3: 1, controlling the content of thiocyanide in inlet water of an adjusting tank to be below 1000 mg/l;
obtaining an optimized method for improving biochemical treatment load in wastewater treatment according to the second embodiment;
EXAMPLE III
The method for optimizing and improving the biochemical treatment load in the wastewater treatment is prepared by the following steps:
the method comprises the following steps: increasing the variety of floras to enhance the activity of the floras, adding 480t of high-efficiency biological agents into an aerobic tank of a key core facility, introducing various biological floras and improving the activity of the biological floras, so that the microorganisms can degrade organic matters in the wastewater more efficiently, the nitration reaction rate is improved, the organic matters are removed efficiently in the biological stage, and the adding amount of subsequent chemical agents is reduced;
step two: performing water quality detection operation, performing a flocculation reagent adding test for multiple times according to water quality, and selecting a high-efficiency and economical reagent, wherein the effluent is light in color and the turbidity is stable at 10 NTU;
step three: the improved primary air floatation device is utilized to carry out normal use work, and organic matters are reduced from the source;
step four: the sludge reflux flowmeter, the anoxic tank water inlet flowmeter and the excess sludge discharge flowmeter are additionally arranged in a biological treatment stage, so that eyes are added in a biological system, the flow of sludge and the reflux quantity of supernatant of a secondary sedimentation tank are adjusted in time after the quality of water of incoming water fluctuates, the index of the biological system is guaranteed, excess sludge is discharged in time according to the operation of the system and the condition of the sludge, the microbial flora in the sludge is kept in a logarithmic growth period, and higher sludge activity is kept;
step five: the method has the advantages that the wastewater monitoring is enhanced, the wastewater is randomly inspected at irregular intervals, abnormal wastewater is found and reported and adjusted in time, the abnormal wastewater receiving amount is reduced, the received abnormal wastewater is guided into an accident pool in time, the dosage is increased in time at the air flotation source, organic matters are reduced, the water quality entering a biochemical system is stabilized, and the water quality fluctuation impact is avoided;
step six: optimizing indexes, increasing the alkalinity analysis indexes of the aerobic tank, controlling the alkalinity of the aerobic tank at 600mg/l, and controlling the reflux ratio of nitrifying liquid at 3: 1, controlling the content of thiocyanide in inlet water of an adjusting tank to be below 1000 mg/l;
obtaining an optimized method for improving biochemical treatment load in wastewater treatment according to the third embodiment;
further, the primary air flotation device is improved in a mode that two sections of air flotation are transformed into first section air flotation to remove light oil, a perforated aeration pipe is laid at the bottom of the first section of air flotation to continuously aerate and release 2mm of bubbles, and the light oil floats upwards and is scraped to remove slag; the second section adds drugs to carry out coagulation reaction, does not carry out aeration precipitation to carry out slag discharge, and reduces organic matters from the source to the maximum extent;
furthermore, the waste water spot inspection system improves the analysis and report efficiency, can find high-concentration waste water in time, adjusts the system, reduces the possibility that the system receives high-concentration waste water impact, improves the desalting water amount along with biochemical treatment and advanced treatment, optimizes the waste water system balance to the maximum extent, and greatly reduces the environmental protection risk and environmental protection economic penalty of enterprises;
furthermore, the high-efficiency biological agent adopted by the auxiliary additive is a composite biological agent obtained by combining engineering bacteria which are screened from nature and are combined by multiple kinds of bacillus and single pseudomonas and combining an enzyme preparation which is prepared by reasonably proportioning protease, lipase, amylase, urease, cellulase and nitrate reductase, the whole biological agent has a better COD (chemical oxygen demand) removing effect, the flocculating agent adopted by the auxiliary additive is an inorganic high-molecular flocculating agent, the coagulating agent adopted by the auxiliary additive is inorganic high-molecular polyaluminium chloride, the whole cost ratio is higher, the treated water quantity is greatly improved, and the biochemical treated water quantity can be 90m3The per hour is lifted to 135m3H, 45m is increased3The continuous discharge of the production wastewater can be ensured;
furthermore, the ammonia nitrogen regulation index of the aerobic tank is increased, the PH value is controlled to be about 8 when ammonia nitrogen is removed, alkalinity control is introduced to replace the PH value, the alkalinity is controlled to be 400-600mg/l, and the ammonia nitrogen regulation index can be ensuredThe efficient performance of the nitration reaction is proved, the water distribution amount of the whole treatment process can be reduced, the water quality of biochemical effluent is improved, and the desalted water amount generated by deep treatment is changed from the original 60m3Increase of h to 90m3And h, the annual benefit can be effectively increased.
Finally, it should be noted that the above-mentioned contents are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, and those skilled in the art can make simple modifications or equivalent substitutions on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (5)

1. A method for optimizing and improving biochemical treatment load in wastewater treatment is characterized by comprising the following steps: sending the wastewater to be treated into an aerobic tank, adding a biological agent into the aerobic tank, arranging an air flotation device in the aerobic tank, wherein the air flotation device comprises two sections, the first section is an aeration section, a perforated aeration pipe is laid at the bottom of the aeration pipe, aeration holes with the diameter of 1.8-2.2mm are formed in the aeration pipe, the second section is a dosing section for adding a flocculating agent and a coagulant, the alkalinity of the aerobic tank is controlled to be 400 plus materials and 600mg/l, and the reflux ratio of a nitrifying liquid is controlled to be 3: 1, controlling the content of the thiocyanide in the inlet water of the regulating reservoir to be below 1000 mg/l.
2. The method for optimizing biochemical treatment load in wastewater treatment according to claim 1, wherein: the biological agent is a composite biological agent which is prepared by combining various bacillus screened from nature and single pseudomonas and combining protease, lipase, amylase, urease, cellulase and nitrate reductase.
3. The method for optimizing biochemical treatment load in wastewater treatment according to claim 1, wherein: the flocculant is an inorganic polymeric flocculant.
4. The method for optimizing biochemical treatment load in wastewater treatment according to claim 1, wherein: the coagulant is inorganic high-molecular polyaluminium chloride.
5. The method for optimizing biochemical treatment load in wastewater treatment according to claim 1, wherein: the dosing section controls the turbidity to be stabilized at 9.5-10.5NTU by controlling the addition amount of the flocculating agent and the coagulant.
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