CN113480107A - Zero-emission process for treating high-salinity high-organic wastewater based on wet catalytic oxidation technology - Google Patents

Zero-emission process for treating high-salinity high-organic wastewater based on wet catalytic oxidation technology Download PDF

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CN113480107A
CN113480107A CN202110888021.1A CN202110888021A CN113480107A CN 113480107 A CN113480107 A CN 113480107A CN 202110888021 A CN202110888021 A CN 202110888021A CN 113480107 A CN113480107 A CN 113480107A
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tank
sludge
wastewater
pumping
catalytic oxidation
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彭辉
杨小梅
李红领
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Suzhou Qinghe Environmental Technology Co ltd
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Suzhou Qinghe Environmental Technology 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
    • C02F1/001—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
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048—Purification of waste water by evaporation
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • 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
    • 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
    • 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
    • C02F2101/30—Organic compounds
    • 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
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • 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
    • C02F2209/22—O2
    • 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
    • C02F2303/00—Specific treatment goals
    • C02F2303/14—Maintenance of water treatment installations
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • 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
    • C02F3/302—Nitrification and denitrification treatment
    • C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
    • 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
    • C02F3/342—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the enzymes used

Abstract

The invention discloses a zero-emission process for treating high-salinity high-organic wastewater based on a wet catalytic oxidation technology, which comprises the following steps of: s1: firstly, pumping the wastewater in an ultrahigh-concentration organic wastewater collection tank into the high-efficiency coagulation and air-flotation all-in-one machine through a water pump for treatment, storing the treated sewage into a first intermediate water tank, then storing the generated sludge into a temporary sludge storage tank, and finally pumping the sludge into a materialized sludge concentration tank for treatment; s2: the bag filter is used for pumping the sewage in the intermediate water tank I into the bag filter for filtering and pumping the filtered sewage into the intermediate water tank II for storage; s3: and wet catalytic oxidation, namely performing wet catalytic oxidation on the sewage in the middle water tank II. The invention has good purification effect, can crystallize and evaporate the sewage through the RO concentration system, further realizes the effect of nitrate separation, realizes the zero emission effect through the evaporation treatment process and has obvious progress.

Description

Zero-emission process for treating high-salinity high-organic wastewater based on wet catalytic oxidation technology
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a zero-emission process for treating high-salinity high-organic wastewater based on a wet catalytic oxidation technology.
Background
The high-salt refractory organic wastewater has the characteristics of high pollutant content, high toxicity, dispersed discharge points, small water quantity and the like, can cause severe pollution of water, is a key point and a difficult point for preventing and treating water pollution, and is extremely deficient in the prior art for economically and effectively treating the high-salt refractory organic wastewater, so that a zero discharge process which is low in cost and can effectively treat the high-salt high-organic wastewater is particularly important.
Disclosure of Invention
The invention aims to provide a zero-emission process for treating high-salinity high-organic wastewater based on a wet catalytic oxidation technology, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
the zero-emission process for treating high-salinity high-organic wastewater based on the wet catalytic oxidation technology comprises the following steps of;
s1: firstly, pumping the wastewater in an ultrahigh-concentration organic wastewater collection tank into the high-efficiency coagulation and air-flotation all-in-one machine through a water pump for treatment, storing the treated sewage into a first intermediate water tank, then storing the generated sludge into a temporary sludge storage tank, and finally pumping the sludge into a materialized sludge concentration tank for treatment;
s2: the bag filter is used for pumping the sewage in the intermediate water tank I into the bag filter for filtering and pumping the filtered sewage into the intermediate water tank II for storage;
s3: wet catalytic oxidation, namely performing wet catalytic oxidation on the sewage in the middle water tank II, pumping the subsequent alkali liquor into an alkali liquor absorption tower for treatment, and then transferring the treated sewage to the next step for treatment;
s4: the wastewater is stored in the biochemical regulating tank for regulation, and clear water is added in the process to dilute the high-salt high-organic wastewater to obtain the diluted high-salt high-organic wastewater;
s5: a hydrolysis acidification pool, wherein the diluted high-salinity high-organic wastewater obtained in the step (a) is pumped into the hydrolysis acidification pool by a water pump for treatment, and microorganisms complete biological catalytic reaction by releasing extracellular free enzymes or immobilized enzymes connected to the outer wall of cells to obtain purified wastewater;
s6: the high-efficiency anaerobic tower reactor is used for pumping the obtained wastewater into the high-efficiency anaerobic tower reactor for purification, so that organic matters in the water are removed, and purified wastewater is obtained;
s7: the primary sedimentation tank is used for pumping the wastewater obtained in the step (A) into the primary sedimentation tank for treatment, the primary sedimentation tank can remove settleable substances and floating substances in the wastewater, and after the wastewater is primarily sedimented, about 50% of the settleable substances, 50% of grease and floating substances and 20% of BOD (biochemical oxygen demand) can be removed to obtain purified wastewater;
s8: the anoxic tank is used for pumping the obtained wastewater into the anoxic tank for treatment, and the anoxic tank can play a role in denitrification to obtain purified wastewater;
s9: the aerobic tank is used for pumping the wastewater obtained in the step (A) into the aerobic tank for treatment, a large amount of activated sludge is cultured in the aerobic tank, a large number of microorganisms capable of purifying water quality are contained in the activated sludge, oxygen necessary for the growth of the microorganisms is provided by aeration in the aerobic tank, and the biological coagulation, adsorption and oxidation effects of the activated sludge are utilized to decompose and remove organic pollutants in the wastewater;
s10: the secondary sedimentation tank is used for pumping the obtained wastewater into the secondary sedimentation tank for treatment, and the secondary sedimentation tank can be used for filtering out particulate matters and sludge in water to obtain sludge and sewage;
s11: the MBR tank is used for pumping the sewage into the MBR tank, and the MBR tank is used for purifying clear water and a small amount of sludge and then performing a downward moving step;
s12: an MBR water producing tank, wherein the clear water obtained in the step S8 is stored in the water producing tank for temporary storage;
s13: the biochemical sludge concentration tank is used for discharging the sludge obtained in the step into the biochemical sludge concentration tank for concentration, then compressing the sludge into a sludge cake shape through a plate-and-frame compressor, and then transporting the sludge out, and finishing sludge cleaning;
s14: the concentrated system of RO produces water through the concentrated system of RO, and the water of output can the retrieval and utilization, obtains the salt of crystallizing simultaneously through the crystallization evaporimeter, finally with the salt of crystallizing discharge can, the aqueous cleaning of the concentrated system output of RO finishes this moment.
In order to improve the purification effect, the invention improves that in the step S10, the filtrate generated in the operation process of the biochemical sludge concentration tank should be pumped into the biochemical regulating tank again through a water pump for circulation treatment.
In order to improve the use effect of the hydrolysis acidification tank, the invention improves that in the step S2, the temperature of the hydrolysis acidification tank is heated to 25-28 ℃ when the diluted high-salinity high-organic wastewater is treated.
In order to improve the purification rate, the invention improves that in the step S4, the removed settleable materials are pumped into the biochemical sludge concentration tank in the step S10 for treatment after the primary sedimentation tank finishes the treatment.
In order to reduce the transportation cost, the invention improves that in the step S10, the mud cake-shaped sludge is transported by a truck.
In order to improve the reliability, the present invention improves that in step S11, before the RO concentration system is used, the worker needs to perform a routine check to avoid the malfunction of the RO concentration system.
Compared with the prior art, the invention has the beneficial effects that:
the zero discharge process for treating high-salinity high-organic wastewater based on the wet catalytic oxidation technology has the advantages that the high-salinity high-organic wastewater can be diluted through the arranged biochemical regulating tank, organic matters in the wastewater can be efficiently removed by means of the hydrolysis acidification tank and the high-efficiency anaerobic tower reactor, the purification effect is improved, sludge in the wastewater can be effectively removed through the primary sedimentation tank, organic matters and sludge can be further removed through the anoxic tank, the aerobic tank and the secondary sedimentation tank, water can be effectively discharged through the MBR tank, filtered sludge can be compressed into a mud cake shape for loading and transportation, the sludge treatment efficiency is improved, the transportation cost is low, the process is economical and high in practicability, meanwhile, the sewage can be crystallized and evaporated through the RO concentration system, the nitrate and salt separation effect is further realized, the zero discharge effect is realized through the evaporation treatment process, the progress is obvious, is beneficial to practical use.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a front flow chart of the zero discharge process for treating high salinity and high organic wastewater based on the wet catalytic oxidation technology of the present invention;
FIG. 2 is a subsequent flow chart of the zero discharge process for treating high-salinity high-organic wastewater based on the wet catalytic oxidation technology provided by the invention.
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.
The first embodiment of the invention provides a zero-emission process for treating high-salinity high-organic wastewater based on a wet catalytic oxidation technology, which comprises the following steps of:
s1: firstly, pumping the wastewater in an ultrahigh-concentration organic wastewater collection tank into the high-efficiency coagulation and air-flotation all-in-one machine through a water pump for treatment, storing the treated sewage into a first intermediate water tank, then storing the generated sludge into a temporary sludge storage tank, and finally pumping the sludge into a materialized sludge concentration tank for treatment;
s2: the bag filter is used for pumping the sewage in the intermediate water tank I into the bag filter for filtering and pumping the filtered sewage into the intermediate water tank II for storage;
s3: wet catalytic oxidation, namely performing wet catalytic oxidation on the sewage in the middle water tank II, pumping the subsequent alkali liquor into an alkali liquor absorption tower for treatment, and then transferring the treated sewage to the next step for treatment;
s4: the wastewater is stored in the biochemical regulating tank for regulation, and clear water is added in the process to dilute the high-salt high-organic wastewater to obtain the diluted high-salt high-organic wastewater;
s5: a hydrolysis acidification pool, wherein the diluted high-salinity high-organic wastewater obtained in the step (a) is pumped into the hydrolysis acidification pool by a water pump for treatment, and microorganisms complete biological catalytic reaction by releasing extracellular free enzymes or immobilized enzymes connected to the outer wall of cells to obtain purified wastewater;
s6: the high-efficiency anaerobic tower reactor is used for pumping the obtained wastewater into the high-efficiency anaerobic tower reactor for purification, so that organic matters in the water are removed, and purified wastewater is obtained;
s7: the primary sedimentation tank is used for pumping the wastewater obtained in the step (A) into the primary sedimentation tank for treatment, the primary sedimentation tank can remove settleable substances and floating substances in the wastewater, and after the wastewater is primarily sedimented, about 50% of the settleable substances, 50% of grease and floating substances and 20% of BOD (biochemical oxygen demand) can be removed to obtain purified wastewater;
s8: the anoxic tank is used for pumping the obtained wastewater into the anoxic tank for treatment, and the anoxic tank can play a role in denitrification to obtain purified wastewater;
s9: the aerobic tank is used for pumping the wastewater obtained in the step (A) into the aerobic tank for treatment, a large amount of activated sludge is cultured in the aerobic tank, a large number of microorganisms capable of purifying water quality are contained in the activated sludge, oxygen necessary for the growth of the microorganisms is provided by aeration in the aerobic tank, and the biological coagulation, adsorption and oxidation effects of the activated sludge are utilized to decompose and remove organic pollutants in the wastewater;
s10: the secondary sedimentation tank is used for pumping the obtained wastewater into the secondary sedimentation tank for treatment, and the secondary sedimentation tank can be used for filtering out particulate matters and sludge in water to obtain sludge and sewage;
s11: the MBR tank is used for pumping the sewage into the MBR tank, and the MBR tank is used for purifying clear water and a small amount of sludge and then performing a downward moving step;
s12: an MBR water producing tank, wherein the clear water obtained in the step S8 is stored in the water producing tank for temporary storage;
s13: the biochemical sludge concentration tank is used for discharging the sludge obtained in the step into the biochemical sludge concentration tank for concentration, then compressing the sludge into a sludge cake shape through a plate-and-frame compressor, and then transporting the sludge out, and finishing sludge cleaning;
s14: the concentrated system of RO produces water through the concentrated system of RO, and the water of output can the retrieval and utilization, obtains the salt of crystallizing simultaneously through the crystallization evaporimeter, finally with the salt of crystallizing discharge can, the aqueous cleaning of the concentrated system output of RO finishes this moment.
In this embodiment: in step S10, the filtrate generated during the operation of the biochemical sludge concentration tank should be pumped into the biochemical regulating tank again through the water pump for circulation treatment, so as to further improve the treatment effect and avoid pollution.
In this embodiment: in the step S2, when the hydrolytic acidification tank is used for treating diluted high-salinity high-organic wastewater, the temperature is heated to 25-28 ℃, and the temperature of 25-28 ℃ is suitable for the growth of most bacteria, so that the efficiency of the biological catalytic reaction is improved, and the use effect is improved.
In this embodiment: in the step S4, after the primary sedimentation tank is processed, the removed settleable substance is pumped into the biochemical sludge concentration tank in the step S10 for processing, so that the settleable substance precipitated in the primary sedimentation tank can be efficiently processed, and the purification efficiency is improved.
In this embodiment: in the step S10, when the sludge cake-shaped sludge is transported, a truck is adopted for loading and transporting, the cost is low by the truck, the transportation amount is large, and the practicability is high.
In this embodiment: in step S11, before the RO concentration system is used, the worker needs to perform a routine check to avoid the failure of the RO concentration system, thereby further improving the reliability of the present invention and reducing the failure probability of the RO concentration system during operation.
As can be seen from the above embodiments, the invention can dilute high-salt high-organic wastewater by the arranged biochemical regulating tank, meanwhile, the organic matters in the wastewater can be efficiently removed by means of the hydrolysis acidification tank and the high-efficiency anaerobic tower reactor, the purification effect is improved, the sludge in the wastewater can be effectively removed through the primary sedimentation tank, the organic matters and the sludge can be further removed through the anoxic tank, the aerobic tank and the secondary sedimentation tank, the water can be effectively discharged through the MBR tank, meanwhile, the filtered sludge can be compressed into a mud cake shape for loading and transportation, the sludge treatment efficiency is improved, the transportation cost is low, the system is economic and has strong practicability, and simultaneously, the sewage can be crystallized and evaporated by an RO concentration system, and the effect of nitrate separation is further realized, so that the zero emission effect is realized through the evaporation treatment process, the progress is obvious, and the method is beneficial to practical use.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims (6)

1. The zero-emission process for treating high-salinity high-organic wastewater based on the wet catalytic oxidation technology is characterized by comprising the following steps of:
s1: firstly, pumping the wastewater in an ultrahigh-concentration organic wastewater collection tank into the high-efficiency coagulation and air-flotation all-in-one machine through a water pump for treatment, storing the treated sewage into a first intermediate water tank, then storing the generated sludge into a temporary sludge storage tank, and finally pumping the sludge into a materialized sludge concentration tank for treatment;
s2: the bag filter is used for pumping the sewage in the intermediate water tank I into the bag filter for filtering and pumping the filtered sewage into the intermediate water tank II for storage;
s3: wet catalytic oxidation, namely performing wet catalytic oxidation on the sewage in the middle water tank II, pumping the subsequent alkali liquor into an alkali liquor absorption tower for treatment, and then transferring the treated sewage to the next step for treatment;
s4: the wastewater is stored in the biochemical regulating tank for regulation, and clear water is added in the process to dilute the high-salt high-organic wastewater to obtain the diluted high-salt high-organic wastewater;
s5: a hydrolysis acidification pool, wherein the diluted high-salinity high-organic wastewater obtained in the step (a) is pumped into the hydrolysis acidification pool by a water pump for treatment, and microorganisms complete biological catalytic reaction by releasing extracellular free enzymes or immobilized enzymes connected to the outer wall of cells to obtain purified wastewater;
s6: the high-efficiency anaerobic tower reactor is used for pumping the obtained wastewater into the high-efficiency anaerobic tower reactor for purification, so that organic matters in the water are removed, and purified wastewater is obtained;
s7: the primary sedimentation tank is used for pumping the wastewater obtained in the step (A) into the primary sedimentation tank for treatment, the primary sedimentation tank can remove settleable substances and floating substances in the wastewater, and after the wastewater is primarily sedimented, about 50% of the settleable substances, 50% of grease and floating substances and 20% of BOD (biochemical oxygen demand) can be removed to obtain purified wastewater;
s8: the anoxic tank is used for pumping the obtained wastewater into the anoxic tank for treatment, and the anoxic tank can play a role in denitrification to obtain purified wastewater;
s9: the aerobic tank is used for pumping the wastewater obtained in the step (A) into the aerobic tank for treatment, a large amount of activated sludge is cultured in the aerobic tank, a large number of microorganisms capable of purifying water quality are contained in the activated sludge, oxygen necessary for the growth of the microorganisms is provided by aeration in the aerobic tank, and the biological coagulation, adsorption and oxidation effects of the activated sludge are utilized to decompose and remove organic pollutants in the wastewater;
s10: the secondary sedimentation tank is used for pumping the obtained wastewater into the secondary sedimentation tank for treatment, and the secondary sedimentation tank can be used for filtering out particulate matters and sludge in water to obtain sludge and sewage;
s11: the MBR tank is used for pumping the sewage into the MBR tank, and the MBR tank is used for purifying clear water and a small amount of sludge and then performing a downward moving step;
s12: an MBR water producing tank, wherein the clear water obtained in the step S8 is stored in the water producing tank for temporary storage;
s13: the biochemical sludge concentration tank is used for discharging the sludge obtained in the step into the biochemical sludge concentration tank for concentration, then compressing the sludge into a sludge cake shape through a plate-and-frame compressor, and then transporting the sludge out, and finishing sludge cleaning;
s14: the concentrated system of RO produces water through the concentrated system of RO, and the water of output can the retrieval and utilization, obtains the salt of crystallizing simultaneously through the crystallization evaporimeter, finally with the salt of crystallizing discharge can, the aqueous cleaning of the concentrated system output of RO finishes this moment.
2. The zero-emission process for treating high-salinity high-organic wastewater based on the wet catalytic oxidation technology as claimed in claim 1, wherein the wet catalytic oxidation technology comprises the following steps: in step S10, the filtrate generated during the operation of the biochemical sludge concentration tank should be pumped into the biochemical adjustment tank again by the water pump for circulation treatment.
3. The zero-emission process for treating high-salinity high-organic wastewater based on the wet catalytic oxidation technology as claimed in claim 1, wherein the wet catalytic oxidation technology comprises the following steps: in the step S2, the hydrolysis acidification tank is heated to 25-28 ℃ when treating the diluted high-salinity high-organic wastewater.
4. The zero-emission process for treating high-salinity high-organic wastewater based on the wet catalytic oxidation technology as claimed in claim 1, wherein the wet catalytic oxidation technology comprises the following steps: in step S4, after the primary sedimentation tank is processed, the removed sediments are pumped into the biochemical sludge concentration tank in step S10 for processing.
5. The zero-emission process for treating high-salinity high-organic wastewater based on the wet catalytic oxidation technology as claimed in claim 1, wherein the wet catalytic oxidation technology comprises the following steps: and in the step S10, when the sludge cake is transported, loading and transporting the sludge cake by a truck.
6. The zero-emission process for treating high-salinity high-organic wastewater based on the wet catalytic oxidation technology as claimed in claim 1, wherein the wet catalytic oxidation technology comprises the following steps: in step S11, before the RO concentration system is used, the worker needs to perform a routine check to avoid the malfunction of the RO concentration system.
CN202110888021.1A 2021-08-03 2021-08-03 Zero-emission process for treating high-salinity high-organic wastewater based on wet catalytic oxidation technology Pending CN113480107A (en)

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Application publication date: 20211008