CN111847682A - Sewage treatment process - Google Patents
Sewage treatment process Download PDFInfo
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- CN111847682A CN111847682A CN202010554570.0A CN202010554570A CN111847682A CN 111847682 A CN111847682 A CN 111847682A CN 202010554570 A CN202010554570 A CN 202010554570A CN 111847682 A CN111847682 A CN 111847682A
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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
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- 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
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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
- 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
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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
- 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
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- 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
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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
- 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
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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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
- 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
Abstract
The invention relates to a sewage treatment process, which relates to the technical field of sewage treatment and discharge and has the technical problem that the utilization amount of the treated sewage cannot keep up with the treatment amount of the sewage, so that a reservoir cannot bear huge water storage amount; which comprises the following steps: s1, adjusting tank: intercepting large particle impurities; s2, primary sedimentation tank: carrying out precipitation treatment; s3, hydrolysis acidification pool: the nonbiodegradable substances are converted into easily biodegradable substances; s4, improving the pool: performing nitrogen and phosphorus removal treatment; s5, secondary sedimentation tank: separating water flow from sludge; s6, an intermediate pool: adding powdered activated carbon and stirring uniformly; s7, efficient sedimentation tank: carrying out coagulation, circulation, inclined tube separation and concentration high-efficiency treatment; s8, ozone catalytic oxidation pond: oxidizing organic matters in the water into carbon dioxide, and converting ammonia nitrogen into nitre peptide ammonia nitrogen; s9: a BAC pool: deeply treating organic matters, SS and nitrification deamination nitrogen; s10, carbon tank: adsorbing COD. The invention has the effect of providing a sewage treatment mode which can be directly discharged into seawater.
Description
Technical Field
The invention relates to the technical field of sewage treatment and discharge, in particular to a sewage treatment process.
Background
At present, the industry develops rapidly, and sewage discharged by the industry needs to be treated so as to reach the national discharge standard.
The invention patent with the prior publication number of CN108164093A provides a sewage treatment process, which comprises the following steps: the sewage is subjected to primary filtration treatment through a grid to remove suspended matters and floating matters in the sewage; introducing the sewage into a flocculation tank, adding a flocculating agent into the flocculation tank, and flocculating the sewage; introducing the sewage into a neutralization tank, adding a neutralizing agent into the neutralization tank, and neutralizing and reacting chemical ions in the sewage in the neutralization tank; and (4) enabling the sewage to flow into a disinfection tank, adding a disinfectant, and reserving the sewage to a reservoir after disinfection treatment.
The above prior art solutions have the following drawbacks: the prior sewage treatment process is characterized in that after sewage is subjected to primary filtration treatment, the sewage is subjected to flocculation treatment and neutralization treatment only, and is discharged into a reservoir after being finally disinfected so as to be subsequently utilized; however, the development of the industry causes more sewage, once the utilization amount of the treated sewage cannot keep up with the treatment amount of the sewage, the reservoir cannot bear huge water storage amount, and the improvement is needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a sewage treatment process which has the treatment advantage of sewage which can be directly discharged into seawater.
The above object of the present invention is achieved by the following technical solutions:
a sewage treatment process comprises the following steps:
s1, adjusting tank: introducing the sewage into a regulating tank, performing primary filtration through a grid of the regulating tank, intercepting large-particle impurities, and discharging the treated sewage to the next treatment position;
s2, primary sedimentation tank: discharging the sewage primarily filtered by the regulating tank into a primary sedimentation tank, performing static sedimentation, performing sedimentation treatment on small particle impurities, and discharging the treated sewage to the next treatment position;
s3, hydrolysis acidification pool: discharging the sewage primarily precipitated in the primary precipitation tank into a hydrolysis acidification tank, adding hydrolytic bacteria and acidification bacteria to convert substances which are difficult to biodegrade in the sewage into substances which are easy to biodegrade, and discharging the treated sewage to the next treatment position;
s4, improving the pool: discharging the sewage treated by the hydrolytic acidification tank into an improvement tank, performing nitrogen and phosphorus removal treatment by using anaerobic, anoxic and aerobic processes, and discharging the treated sewage to the next treatment position;
s5, secondary sedimentation tank: discharging the sewage treated by the improved tank into a secondary sedimentation tank, carrying out secondary sedimentation, separating water flow from sludge, and discharging the treated sewage to the next treatment position;
S6, an intermediate pool: discharging the sewage treated by the secondary sedimentation tank into an intermediate water tank, adding powdered activated carbon, uniformly stirring, and discharging the treated sewage to the next treatment position;
s7, efficient sedimentation tank: discharging the sewage treated by the secondary sedimentation tank into a high-efficiency sedimentation tank, adding iron element and PAM, performing coagulation, circulation, inclined tube separation and concentration high-efficiency treatment on the sewage, and discharging the treated sewage to the next treatment position;
s8, ozone catalytic oxidation pond: discharging the sewage treated by the high-efficiency sedimentation tank into an ozone catalytic oxidation tank, adding manganese dioxide for treatment, oxidizing organic matters in water into carbon dioxide, converting ammonia nitrogen into nitropeptide ammonia nitrogen, and discharging the treated sewage to the next treatment position after reaction;
s9: a BAC pool: discharging the sewage treated by the ozone catalytic oxidation tank into a BAC tank, adding granular activated carbon, deeply treating organic matters, SS and nitrification deamination nitrogen, and discharging the treated sewage to the next treatment position;
s10, carbon tank: discharging the sewage treated by the BAC pool into a carbon tank, reacting by using granular activated carbon, adsorbing COD, and discharging the treated sewage to the next treatment position;
s11, draining a water pool: and discharging the sewage treated by the carbon tank into a discharge water tank, and directly discharging the treated sewage in the discharge water tank into seawater.
By adopting the technical scheme, the process flow is a whole set of process flow from water inlet to an adjusting tank, a primary sedimentation tank, a hydrolysis acidification tank, an improvement tank, a secondary sedimentation tank, an intermediate water tank, a high-efficiency sedimentation tank, an ozone catalytic oxidation tank, a BAC tank, a carbon tank and a final discharge water tank; adopting hydrolysis acidification, improved AAO, ozone catalytic oxidation and BAC process, wherein the aeration mode is air floating pipe type micropore aeration, and an air source is provided for the biochemical reaction tank by an air blower room; finally, the industrial sewage treatment reaches the national drainage standard; provides a sewage treatment mode which has simple steps and short time consumption and can be directly discharged into seawater.
The present invention in a preferred example may be further configured to: in the step S1, an online water quality monitoring instrument is installed in the regulating reservoir.
Through adopting above-mentioned technical scheme, install online water quality monitoring instrument in the equalizing basin, data direct transmission to central control room can judge the sewage quality of water condition of advancing factory, if the equalizing basin water quality surpasses normal control scope, then the equalizing basin goes out water and must not get into back end processing unit, has reduced the condition emergence of the useless work in later stage, has reduced the loss of the energy.
The present invention in a preferred example may be further configured to: in the step S2, the primary sedimentation tank needs 2 to 3 days for primary sludge treatment.
By adopting the technical scheme, the sludge treatment interval of the primary sedimentation tank is controlled, and partial bottom sludge is properly discharged, so that the sludge accumulated at the bottom of the primary sedimentation tank is prevented from being difficult to open and operate.
The present invention in a preferred example may be further configured to: and in the step S4, controlling the pH value of the sewage to be 7.5-8.5.
The dependence of nitrification on the pH value is strong, meanwhile, the nitrification process is an acid production process, if the acidity of the sewage is low, the nitrification can be inhibited, and the activity of the sludge can be destroyed in serious cases.
The present invention in a preferred example may be further configured to: in the step S4, the sludge concentration in the tank is controlled to be 2-6 gMLSS/L.
Through adopting above-mentioned technical scheme, control pond mud concentration alleviates because the numerical value is too high to lead to the oxygen suppliment not enough, and mud activity reduces, and it is influenced to go out water quality of water, and the numerical value is crossed low and is leaded to the condition of system overload to take place.
The present invention in a preferred example may be further configured to: in the step S4, sedimentation performance in the pool is controlled, wherein SV is between 15 and 40 percent, and SVI is between 80 and 150 ml/g MLSS.
By adopting the technical scheme, the sedimentation performance in the pool is controlled, and once the numerical value is too high, the sludge is lost, and the effluent quality is reduced.
The present invention in a preferred example may be further configured to: in step S4, the concentration of dissolved oxygen in the sludge is controlled to be 1-5mg/L when aeration is performed in the tank. In the anoxic or anaerobic stage, the dissolved oxygen concentration is controlled below 0.5 mg/L.
By adopting the technical scheme, the concentration of dissolved oxygen under different conditions is controlled, the increase of energy consumption caused by overhigh DO in the aeration stage is reduced, the time formed under anoxic and anaerobic conditions is prolonged, and the actual anoxic time and anaerobic time are shortened; the low DO in the aeration stage causes the reduction of the BOD/COD removal rate, the influence on the nitrification effect, the generation of peculiar smell and the reduction of the sludge quality.
The present invention in a preferred example may be further configured to: in the step S4, the time for the treated sewage to be treated in the anaerobic section is controlled to be 3-4h, the time for the treated sewage to be treated in the anoxic section is controlled to be 6-7h, and the time for the treated sewage to be treated in the aerobic section is controlled to be 15-16 h.
Through adopting above-mentioned technical scheme, carry out time control to the treatment environment under the different conditions, when guaranteeing sewage treatment effect to improve sewage treatment efficiency.
The present invention in a preferred example may be further configured to: in the step S5, the thickness of the sludge layer is controlled to be less than one third of the depth of the sewage in the tank.
By adopting the technical scheme, the ratio of the sludge to the depth of the sewage in the tank is controlled, and the possibility of floating the sludge due to the fact that the sludge level is too high is reduced; the sludge concentration is too high, the economic cost of operation is increased, the microorganisms excessively grow, and the water quality is deteriorated.
In summary, the invention includes at least one of the following beneficial technical effects:
1. adopting hydrolysis acidification, improved AAO, ozone catalytic oxidation and BAC process, wherein the aeration mode is air floating pipe type micropore aeration, and an air source is provided for the biochemical reaction tank by an air blower room; finally, the industrial sewage treatment reaches the national drainage standard; provides a sewage treatment mode which has simple steps and short time consumption and can be directly discharged into seawater;
2. and controlling the sludge treatment interval of the primary sedimentation tank, and properly discharging partial sludge at the bottom so as to prevent sludge accumulated at the bottom of the primary sedimentation tank from being difficult to open and operate.
Drawings
Fig. 1 is a schematic flow chart of the present embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a sewage treatment process includes the following steps:
s1, adjusting tank: introducing the sewage into a regulating tank, performing primary filtration through a grid of the regulating tank, intercepting large-particle impurities, and discharging the treated sewage to the next treatment position; an online water quality monitoring instrument is arranged in the regulating reservoir, and data are directly transmitted to the central control room, so that the condition of the quality of the sewage entering the factory can be judged.
S2, primary sedimentation tank: discharging the sewage primarily filtered by the regulating tank into a primary sedimentation tank, performing static sedimentation, performing sedimentation treatment on small particle impurities, and discharging the treated sewage to the next treatment position;
the primary sedimentation tank needs 2 days for primary sludge treatment; the effluent of the primary sedimentation tank should be clear and free of impurities, if sludge leakage occurs and the water body is turbid, the sludge discharge time of the primary sedimentation tank should be increased, the water inflow is controlled, or coagulant is added to ensure that the effluent is free of impurities.
S3, hydrolysis acidification pool: discharging the sewage primarily precipitated in the primary precipitation tank into a hydrolysis acidification tank, adding hydrolytic bacteria and acidification bacteria to convert substances which are difficult to biodegrade in the sewage into substances which are easy to biodegrade, and discharging the treated sewage to the next treatment position.
S4, improving the pool: discharging the sewage treated by the hydrolytic acidification tank into an improvement tank, performing nitrogen and phosphorus removal treatment by using anaerobic, anoxic and aerobic processes, and discharging the treated sewage to the next treatment position;
after methanol is added into the anaerobic front end, the total nitrogen is reduced through denitrifying bacteria; adding iron element at the tail end of the aerobic tank for degrading ammonia nitrogen; and the micro-pore aeration treatment is adopted to increase the dissolved oxygen in the water to 4mg/L and generate nitrate ammonia.
Controlling the pH value of the sewage at 8; controlling the sludge concentration in the tank to be 4 gMLSS/L; controlling the sedimentation performance in the pool, wherein SV is between 30 percent, and SVI is between 115 ml/g MLSS; controlling the concentration of dissolved oxygen in the sludge to be 1-5 mg/L; in the anoxic or anaerobic stage, the concentration of dissolved oxygen is controlled below 0.5 mg/L; the time for treating the sewage in the anaerobic section is controlled to be 3.6h, the time for treating the sewage in the anoxic section is controlled to be 6.2h, and the time for treating the sewage in the aerobic section is controlled to be 15.9 h.
S5, secondary sedimentation tank: discharging the sewage treated by the improved tank into a secondary sedimentation tank, carrying out secondary sedimentation, separating water flow from sludge, and discharging the treated sewage to the next treatment position;
the thickness of the sludge layer is controlled to be less than one third of the depth of the sewage in the tank, and the sludge level is too high, so that the possibility of floating the sludge in the effluent overflow is increased; the sludge concentration is too high, the economic cost of operation is increased, microorganisms excessively grow, the water quality is deteriorated, the sludge concentration is too low, the sludge load is high, and the pollution factor treatment efficiency is low.
S6, an intermediate pool: discharging the sewage treated by the secondary sedimentation tank into an intermediate water tank, adding powdered activated carbon, uniformly stirring, adsorbing COD (chemical oxygen demand) in the water, and discharging the treated sewage to the next treatment position; the water quality purification dosing system realizes automatic dosing through a field instrument, and the dosing ratio is set at 500 mg/L.
S7, efficient sedimentation tank: discharging the sewage treated by the secondary sedimentation tank into a high-efficiency sedimentation tank, adding iron element and PAM to settle activated carbon, performing coagulation, circulation, inclined tube separation and concentration high-efficiency treatment on the sewage, and discharging the treated sewage to the next treatment position, wherein the inclined tube improves the settling property;
s8, ozone catalytic oxidation pond: discharging the sewage treated by the high-efficiency sedimentation tank into an ozone catalytic oxidation tank, adding manganese dioxide for treatment, oxidizing organic matters in water into carbon dioxide, converting ammonia nitrogen into nitropeptide ammonia nitrogen, and discharging the treated sewage to the next treatment position after reaction;
S9: a BAC pool: discharging the sewage treated by the ozone catalytic oxidation tank into a BAC tank, adding granular activated carbon, deeply treating organic matters, SS and nitrification deamination nitrogen, and discharging the treated sewage to the next treatment position;
s10, carbon tank: discharging the sewage treated by the BAC pool into a carbon tank, fully utilizing granular activated carbon to perform reaction, adsorbing COD, and discharging the treated sewage to the next treatment position;
s11, draining a water pool: and discharging the sewage treated by the carbon tank into a discharge water tank, and directly discharging the sewage which is treated in the discharge water tank and reaches the national standard into seawater.
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:
s1, adjusting tank: introducing the sewage into a regulating tank, performing primary filtration through a grid of the regulating tank, intercepting large-particle impurities, and discharging the treated sewage to the next treatment position;
s2, primary sedimentation tank: discharging the sewage primarily filtered by the regulating tank into a primary sedimentation tank, performing static sedimentation, performing sedimentation treatment on small particle impurities, and discharging the treated sewage to the next treatment position;
S3, hydrolysis acidification pool: discharging the sewage primarily precipitated in the primary precipitation tank into a hydrolysis acidification tank, adding hydrolytic bacteria and acidification bacteria to convert substances which are difficult to biodegrade in the sewage into substances which are easy to biodegrade, and discharging the treated sewage to the next treatment position;
s4, improving the pool: discharging the sewage treated by the hydrolytic acidification tank into an improvement tank, performing nitrogen and phosphorus removal treatment by using anaerobic, anoxic and aerobic processes, and discharging the treated sewage to the next treatment position;
s5, secondary sedimentation tank: discharging the sewage treated by the improved tank into a secondary sedimentation tank, carrying out secondary sedimentation, separating water flow from sludge, and discharging the treated sewage to the next treatment position;
s6, an intermediate pool: discharging the sewage treated by the secondary sedimentation tank into an intermediate water tank, adding powdered activated carbon, uniformly stirring, and discharging the treated sewage to the next treatment position;
s7, efficient sedimentation tank: discharging the sewage treated by the secondary sedimentation tank into a high-efficiency sedimentation tank, adding iron element and PAM, performing coagulation, circulation, inclined tube separation and concentration high-efficiency treatment on the sewage, and discharging the treated sewage to the next treatment position;
s8, ozone catalytic oxidation pond: discharging the sewage treated by the high-efficiency sedimentation tank into an ozone catalytic oxidation tank, adding manganese dioxide for treatment, oxidizing organic matters in water into carbon dioxide, converting ammonia nitrogen into nitropeptide ammonia nitrogen, and discharging the treated sewage to the next treatment position after reaction;
S9: a BAC pool: discharging the sewage treated by the ozone catalytic oxidation tank into a BAC tank, adding granular activated carbon, deeply treating organic matters, SS and nitrification deamination nitrogen, and discharging the treated sewage to the next treatment position;
s10, carbon tank: discharging the sewage treated by the BAC pool into a carbon tank, reacting by using granular activated carbon, adsorbing COD, and discharging the treated sewage to the next treatment position;
s11, draining a water pool: and discharging the sewage treated by the carbon tank into a discharge water tank, and directly discharging the treated sewage in the discharge water tank into seawater.
2. The wastewater treatment process according to claim 1, characterized in that: in the step S1, an online water quality monitoring instrument is installed in the regulating reservoir.
3. The wastewater treatment process according to claim 1, characterized in that: in the step S2, the primary sedimentation tank needs 2 to 3 days for primary sludge treatment.
4. The wastewater treatment process according to claim 1, characterized in that: and in the step S4, controlling the pH value of the sewage to be 7.5-8.5.
5. The wastewater treatment process according to claim 1, characterized in that: in the step S4, the sludge concentration in the tank is controlled to be 2-6 gMLSS/L.
6. The wastewater treatment process according to claim 1, characterized in that: in the step S4, sedimentation performance in the pool is controlled, wherein SV is between 15 and 40 percent, and SVI is between 80 and 150 ml/g MLSS.
7. The wastewater treatment process according to claim 1, characterized in that: in step S4, the concentration of dissolved oxygen in the sludge is controlled to be 1-5mg/L when aeration is performed in the tank.
8. In the anoxic or anaerobic stage, the dissolved oxygen concentration is controlled below 0.5 mg/L.
9. The wastewater treatment process according to claim 1, characterized in that: in the step S4, the time for the treated sewage to be treated in the anaerobic section is controlled to be 3-4h, the time for the treated sewage to be treated in the anoxic section is controlled to be 6-7h, and the time for the treated sewage to be treated in the aerobic section is controlled to be 15-16 h.
10. The wastewater treatment process according to claim 1, characterized in that: in the step S5, the thickness of the sludge layer is controlled to be less than one third of the depth of the sewage in the tank.
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| CN202010554570.0A CN111847682A (en) | 2020-06-17 | 2020-06-17 | Sewage treatment process |
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| CN202010554570.0A CN111847682A (en) | 2020-06-17 | 2020-06-17 | Sewage treatment process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112479418A (en) * | 2020-11-03 | 2021-03-12 | 河南省正大环境科技咨询工程有限公司 | Sewage treatment process based on artificial wetland |
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| JP2002186994A (en) * | 2000-12-20 | 2002-07-02 | Hitachi Zosen Corp | Method for water treatment |
| CN204689821U (en) * | 2015-04-17 | 2015-10-07 | 浙江海洋学院 | A kind of containing zinc waste disposal plant |
| CN105776746A (en) * | 2016-04-05 | 2016-07-20 | 北京北华中清环境工程技术有限公司 | Integrated wastewater treatment process and system for chemical industrial park |
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2020
- 2020-06-17 CN CN202010554570.0A patent/CN111847682A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002186994A (en) * | 2000-12-20 | 2002-07-02 | Hitachi Zosen Corp | Method for water treatment |
| CN204689821U (en) * | 2015-04-17 | 2015-10-07 | 浙江海洋学院 | A kind of containing zinc waste disposal plant |
| CN105776746A (en) * | 2016-04-05 | 2016-07-20 | 北京北华中清环境工程技术有限公司 | Integrated wastewater treatment process and system for chemical industrial park |
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| 上海市政工程设计院等编: "《给水排水设计手册 第3册 城市给水》", 31 December 1986, 北京：中国建筑工业出版社 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112479418A (en) * | 2020-11-03 | 2021-03-12 | 河南省正大环境科技咨询工程有限公司 | Sewage treatment process based on artificial wetland |
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