CN112723693A - Method for biochemically treating town sewage in cooperation with sludge reduction - Google Patents

Method for biochemically treating town sewage in cooperation with sludge reduction Download PDF

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CN112723693A
CN112723693A CN202011503420.3A CN202011503420A CN112723693A CN 112723693 A CN112723693 A CN 112723693A CN 202011503420 A CN202011503420 A CN 202011503420A CN 112723693 A CN112723693 A CN 112723693A
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sludge
biochemical
carbon black
biochemical treatment
town sewage
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CN112723693B (en
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陈映竹
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Changsha Jiannuo 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
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/02—Biological treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
    • C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
    • 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
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
    • C10L5/00—Solid fuels
    • C10L5/40—Solid fuels essentially based on materials of non-mineral origin
    • C10L5/46—Solid fuels essentially based on materials of non-mineral origin on sewage, house, or town refuse
    • 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
    • C02F2303/06—Sludge reduction, e.g. by lysis
    • 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
    • C02F2303/10—Energy recovery
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/10—Biofuels, e.g. bio-diesel
    • 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
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00—Technologies for the production of fuel of non-fossil origin
    • Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
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  • Biodiversity & Conservation Biology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Treatment Of Sludge (AREA)

Abstract

The invention discloses a method for biochemically treating town sewage in coordination with sludge reduction, which comprises the steps of adding garbage carbon black into a biochemical aeration tank of a biochemical treatment process of pretreated town sewage for biochemical reaction, performing solid-liquid separation in a sedimentation tank, discharging effluent reaching the standard, performing pressure filtration on sludge to obtain filtrate and filter cake, returning the filtrate to the biochemical aeration tank, and reducing the water content of the filter cake to below 50%. The treatment process of the invention does not need gravity concentration and chemical agent conditioning for the sludge after biochemical treatment, and does not need heat drying with extremely high investment and operation cost, only garbage carbon black is added into a biochemical aeration tank for biochemical reaction, and then simple diaphragm filter pressing is adopted to meet the requirement that the water content of the sludge is less than or equal to 50%, and simultaneously a chemical phosphorus removal system can be omitted at the rear end of the biochemical treatment, so that the corresponding operation cost such as investment, phosphorus removal agent and the like can be saved.

Description

Method for biochemically treating town sewage in cooperation with sludge reduction
Technical Field
The invention belongs to the technical field of town sewage treatment, and particularly relates to a method for biochemically treating town sewage in coordination with sludge reduction.
Background
At present, the scale of the urban sewage treatment plant is different from tens of thousands of tons per day to tens of thousands of tons per day, and some of the urban sewage treatment plants are up to more than one million tons per day. The common town sewage treatment process mainly comprises the traditional activated sludge method and an A/O series (anaerobic or anoxic/aerobic)Oxygen), oxidation ditch series, SBR series (sequencing batch reactor activated sludge process), contact oxidation process, and the like. Among them, the most widely used is A2The application of the/O process (anaerobic/anoxic/aerobic), the oxidation ditch series and the MSBR process (modified sequencing batch activated sludge process) mainly starts from denitrification (N) and dephosphorization (P).
The water content of the sludge in the biochemical treatment sedimentation tank is generally more than 99.2-99.5 percent. In order to reduce the sludge amount and greatly reduce the water content of the sludge, two main methods for treating and disposing the excess sludge are provided, wherein the first method adopts centrifugal separation or belt type filter pressing to reduce the water content to below 80 percent and then enters a sludge treatment disposal site for treatment. The second method is that the water content of the sludge is concentrated by gravity to 96-98%, then the sludge is conditioned by chemical agents and filtered by plate and frame press to be reduced to below 60%, or some sludge is further dried by heat to reduce the water content to below 50%, and finally the sludge is sent to blending burning, brick making, fertilizing, landfill and the like. If the water content of the excess sludge is less than or equal to 50 percent before leaving the factory, a second method is adopted, and gravity concentration has to be adopted. As the gravity concentration retention time is as long as more than 16-24 h, N, P in the sludge, especially P, is released to the concentrated supernatant again, and the supernatant is returned to the biochemical treatment system, the capacity of the biochemical system for removing N and P is greatly reduced, which is the reason why a sewage plant adopting the sludge gravity concentration needs to be additionally provided with a chemical P removal system after the biochemical treatment.
Meanwhile, in the process of cracking the urban domestic garbage, the byproducts of carbon black are produced in addition to products such as combustible gas, oil and the like. The garbage carbon black is a solid-phase product obtained after organic matters are pyrolyzed, the yield of the garbage carbon black is about 100-200 kg/ton, and the garbage carbon black has a low heat value (generally more than 4000-5000 kCal/kg). At present, the garbage carbon black is mostly used as a low-grade industrial fuel in a garbage cracking furnace, which is subjected to a combustion reaction with air introduced from the lower part of the furnace and partially supplies heat required for melting ash.
Disclosure of Invention
In order to solve the problems in the existing biochemical treatment process of town sewage, the invention aims to provide a convenient and reliable biochemical treatment method of town sewage in coordination with sludge reduction, which does not need gravity concentration, chemical agent conditioning and heat drying with extremely high investment and operation cost for the sludge after biochemical treatment, only needs garbage carbon black to be added into a biochemical aeration tank for biochemical reaction, and then adopts simple diaphragm filter pressing to meet the requirement that the water content of the sludge is less than or equal to 50 percent, and simultaneously, the chemical phosphorus removal system can be omitted at the rear end of the biochemical treatment, thereby saving the corresponding investment and the operation cost such as P removal agent and the like.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a method for biochemical treatment of town sewage with synergistic sludge decrement includes such steps as adding carbon black garbage to biochemical aeration tank for biochemical reaction, solid-liquid separation in settling tank, discharging the effluent, filter pressing sludge to obtain filtrate and filter cake, returning the filtrate back to biochemical aeration tank, and decreasing the water content of filter cake to below 50%.
In the invention, the town sewage is treated by conventional treatment processes such as grating, sand setting and the like, and then enters a biochemical treatment process.
Preferably, the biochemical treatment process is a traditional activated sludge method, an A/O series, an oxidation ditch series, an SBR series or a contact oxidation method; more preferably A2the/O process, the oxidation ditch series or the MSBR process.
Preferably, the garbage carbon black is a solid-phase product obtained after organic matters in the garbage carbon black are pyrolyzed in the process of cracking the urban household garbage.
Preferably, the mass ratio of the added amount of the garbage carbon black to the dry-based sludge is as follows: mGarbage carbon black:MDry basis sludge(mass ratio) 0.3-1.0: 1.0.
Preferably, the particle size of the garbage carbon black is 30-300 mu m, and the specific surface area>20m2/g。
Preferably, the density of the garbage carbon black is less than or equal to 1.1 kg/L.
Preferably, the hydrophobic angle of the garbage carbon black is as follows: 40 ° < hydrophobic angle <90 °.
As is known, the activated carbon is high in price, the hydrophobic angle of the activated carbon is generally 15-40 degrees, and the activated carbon has certain hydrophilicity; the hydrophobic angle of the biochar is generally larger than 90 degrees, the biochar has over-strong hydrophobicity, is easy to float on the water surface and is difficult to settle and separate in a settling pond; the density of the semi-coke powder is generally more than 1.1kg/L, and the semi-coke powder is easy to precipitate at the bottom of the biochemical aeration tank. Based on the method, the garbage carbon black is used as an additive of biochemical reaction of the biochemical aeration tank, and a more rich and developed microporous structure is formed in the pyrolysis process of organic matters in the urban domestic garbage, so that the garbage carbon black has better adsorption performance on fine sludge particles, and the particle size of the sludge particles is greatly increased; the hydrophobic angle is generally between 40 degrees and 90 degrees, so that the hydrophobic property of the sludge can be effectively improved, and the sludge is easy to settle and separate in a settling pond; and the density of the activated sludge is not higher than 1.1kg/L generally, so that the activated sludge can be suspended in a biochemical aeration tank and can play an effective role in cooperation with the activated sludge. In a word, the invention takes the specific garbage carbon black as the additive of the biochemical reaction of the biochemical aeration tank, and can obviously improve the settling performance and the filter-pressing dehydration performance of the sludge based on the synergistic effect of the unique physical property parameters of the specific garbage carbon black.
The invention has the advantages that:
(1) the sludge dewatering process is very simplified
In a municipal sewage plant, before sludge leaves a factory, if the sludge is reduced to the water content of the sludge is less than or equal to 50%, the residual sludge is subjected to gravity concentration until the water content of the sludge is 96-98%, then is conditioned by chemical agents, is subjected to plate-and-frame filter pressing until the water content of the sludge is about 60%, and finally is subjected to heat drying until the water content is reduced to below 50%. By adopting the biochemical treatment method for adding the garbage carbon black in the biochemical aeration tank, on one hand, the water content of the residual sludge in the sedimentation tank (secondary sedimentation tank) can be reduced to below 98.5-97.5% from the original 99.1-99.4% or more; on the other hand, the filtration performance of the excess sludge can be obviously improved, and the corresponding specific resistance of the sludge is reduced to 3.86 multiplied by 1012～8.30×1011The range of directly reaching the sludge specific resistance less than or equal to 4.0 multiplied by 10 required by sludge dehydration12Target of m/kg. Thus, neither gravity concentration nor chemistry is requiredThe medicament is conditioned, and heat drying with extremely high investment and operation cost is not needed. Therefore, the biochemical treatment method with the synergistic sludge reduction provided by the invention has the advantages that the sludge dewatering process is extremely simplified, the biochemical reaction is carried out by only adding garbage carbon black into the biochemical aeration tank, and then the requirement that the water content of the sludge is less than or equal to 50 percent can be met by adopting a simple diaphragm filter pressing step.
(2) The chemical phosphorus removal system can be omitted at the back end of the biochemical treatment
In the prior urban sewage treatment plant, when the residual sludge is subjected to gravity concentration, the retention time is more than 16-24 hours, the sludge at the lower part of the gravity concentration tank releases phosphorus into supernatant liquid again due to anaerobic reaction, and the supernatant liquid needs to return to a biochemical system. In order to ensure the phosphorus removal effect and lead the discharged phosphorus to reach the standard, a chemical phosphorus removal system is additionally arranged after biochemical treatment. Even if A is adopted2The same is true of the biochemical treatment process of the/O biological phosphorus removal. This is because A is2the/O biological phosphorus removal is realized by discharging phosphorus-containing excess sludge. Obviously, the gravity thickening tank is set for A2the/O biological phosphorus removal is extremely disadvantageous. In the technology of the invention, because the residual sludge does not need gravity concentration any more, a chemical phosphorus removal system can be omitted at the rear end of the biochemical treatment, and the corresponding investment and operation cost such as P removal agents and the like can be saved.
(3) Treating waste with waste and resource utilization
The waste carbon black is a byproduct in the cracking process of urban domestic garbage, can be applied to urban sewage biochemical treatment to improve the solid-liquid separation efficiency of a sedimentation tank, reduce the water content of excess sludge in the sedimentation tank, can also obviously improve the dehydration performance of the sludge, enters a diaphragm together with the excess sludge for filter pressing, has a certain heat value, and provides favorable conditions for recovering the heat value of the sludge. Therefore, the method can realize resource utilization while treating wastes with processes of wastes against one another and cooperating with sludge reduction. Finally, the waste carbon black and the sludge become subsequent fuel products together: the water content is less than or equal to 50 percent, the heat value is more than or equal to 2400kCal/kg, the combustion requirement is met, and the fuel can be used as fuel for mixed combustion of boilers in power plants, cement plants, biomass power plants and the like, can also be used for waste incineration power generation, and is hopeful to be applied to self-sustaining combustion power generation of boilers.
Drawings
FIG. 1 is a schematic process flow diagram of example 1 of the present invention.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be noted that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention. In practice, the technical personnel according to the invention make improvements and modifications, which still belong to the protection scope of the invention.
It should be noted that the biochemical treatment process in the present invention is only required to be the conventional biochemical treatment process, and the detailed process is not described herein again.
Example 1
As shown in fig. 1:
indexes of town sewage are as follows: pH is 6-8, the suspended matter content SS is more than or equal to 200mg/L, the chemical oxygen demand CODcr is 150-250 mg/L, and the biochemical oxygen demand BOD580-150 mg/L of total nitrogen TN 15-25 mg/L and ammonia nitrogen NH3-N is 10-15 mg/L, total phosphorus TP is 2-3 mg/L, and a large amount of coarse suspended matters, silt and the like are contained.
(1) The pretreatment process comprises the following steps:
firstly, the grid and the settled sand are used for removing coarse suspended matters, silt and the like, and SS is less than or equal to 200 mg/L.
Indexes of the pretreated sewage are as follows: pH 6-8, SS 100-200 mg/L, CODcr 150-250 mg/L, BOD5＝80～150mg/L，TN＝15～25mg/L，NH3-N＝10～15mg/L，TP＝2～3mg/L。
(2)A2The biochemical treatment process comprises the following steps:
the pretreated sewage sequentially passes through an anaerobic section, an anoxic section and an aerobic section, and is in a biochemical aeration tank (dissolved oxygen DO is 2-4 mg/L, the suspended solid concentration of mixed liquid MLSS is 2-5 g/L, the suspended solid concentration of volatile MLVSS is 1-3 g/L, and the sludge load F/M is 0.10 kgBOD)5about/kgMLSS.d), the garbage carbon black (the addition amount is shown in the table 1) is added to carry out biochemical reaction, and the following index requirements are met: sludge sedimentation ratio SV3015% -30% of sludge volume indexSVI 50-150, COD removal rate is more than or equal to 80% -90%, and the activated sludge contains a large amount of zoogloea and cilia protozoa such as glochidium, swimming ciliates and the like; the mixed liquid flows into the sedimentation tank automatically after passing through the biochemical aeration tank. A. the2In the/O biochemical treatment process, sludge in the sedimentation tank flows back to the anaerobic section; in order to control the sludge load F/M within the required range, the excess sludge is discharged from the sedimentation tank to the sludge storage tank at regular time. Performing WH (sludge moisture percentage) on excess sludge2The average results of the measurements of the indexes such as O and sludge specific resistance r are shown in Table 1.
Garbage carbon black: in the process of cracking the urban domestic garbage, the solid-phase product obtained after the organic matters are pyrolyzed has the particle size of 30-300 mu m and the specific surface area>20m2G, density less than or equal to 1.1kg/L, 40 °<Hydrophobic angle<90°。
Effluent indexes of the sedimentation tank are as follows: meets the requirements of the first grade A discharge standard in the discharge Standard of pollutants for municipal wastewater treatment plants (GB 18918-2002), such as pH 6.0-9.0, SS less than or equal to 10mg/L, chroma (dilution multiple) less than or equal to 30, CODcr less than or equal to 50mg/L, BOD5≤10mg/L，TN≤15mg/L，NH3-N≤5(8)mg/L，TP≤1mg/L。
The index of the excess sludge is as follows: the water content is 98.5-97.5 percent, and the sludge specific resistance is 3.86 multiplied by 1012～8.30×1011。
(3) And (3) filter pressing treatment process:
the excess sludge is pumped from the sludge storage tank to the area of 0.5m2The pressing pressure is controlled to be not less than 1.6MPa and not more than P<And (3) carrying out diaphragm filter pressing on a 2.0MPa XAYG0.5/630-U type high-pressure diaphragm filter press to obtain a pressure filtrate and a mud cake, and returning the pressure filtrate to the biochemical aeration tank for circular treatment.
Index of press filtrate: pH 6.0-9.0, SS not more than 20mg/L, chroma (dilution multiple) not more than 50, CODcr<500mg/L，TN<15mg/L，NH3-N≤5mg/L，TP≤1mg/L；
Mud cake indices (see table 2): the water content Mt of the mud cakes is less than or equal to 50 percent, and the dry basis heat value Qad is more than or equal to 2400kCal/kg or 2400-3260 kCal/kg.
TABLE 1 addition of garbage carbon black A2Test results of/O Biochemical treatment
Figure BDA0002844163480000051
As can be seen from Table 1, after the garbage carbon black is added into the biochemical aeration tank, the sludge volume index SVI reflecting the performance of the activated sludge is in a normal range of 50-150, the water content of the residual sludge in the sedimentation tank can be reduced from 99.1-99.4% to 98.5-97.5%, and the water content of the sludge is close to 98-97% of that of the sludge subjected to the biochemical treatment gravity concentration of the urban sewage in the past. Moreover, the filtration performance of the excess sludge is obviously improved, and the specific resistance of the sludge can be higher than that of the original 1.39 multiplied by 10 when no garbage carbon black is added13m/kg is reduced to 3.86X 1012～8.30×1011The range directly meets the requirement that the sludge specific resistance r required by filter pressing is less than or equal to 4 multiplied by 1012The requirements of (1). The test result also shows that the activity of the biological microscopic microorganism is normal, and the effluent indexes of the sedimentation tank after biochemical treatment all reach the requirements of the first-class A discharge standard in GB 18918-2002.
TABLE 2 technical indices of mud cake
Figure BDA0002844163480000061
As can be seen from Table 2, the water content Mt of the sludge filter cake is reduced to below 50%, the dry basis heat value Qad and net can reach 2420-3260 kCal/kg, and the combustion requirement can be met. Therefore, the sludge filter cake can be used as fuel in power plants, cement plants, biomass power plants, boiler mixed combustion and other occasions, can also be used for waste incineration power generation, and is hopefully applied to boiler self-sustained combustion power generation.

Claims (7)

1. A method for biochemical treatment of town sewage in coordination with sludge reduction is characterized in that: adding garbage carbon black into a biochemical aeration tank of a biochemical treatment process of pretreated urban sewage to carry out biochemical reaction, carrying out solid-liquid separation in a sedimentation tank, discharging the effluent up to the standard, carrying out pressure filtration on sludge to obtain filtrate and filter cake, returning the filtrate to the biochemical aeration tank, and reducing the water content of the filter cake to below 50%.
2. The method for biochemical treatment of town sewage with cooperative sludge reduction as claimed in claim 1, wherein: the biochemical treatment process is a traditional activated sludge method, an A/O series, an oxidation ditch series, an SBR series or a contact oxidation method.
3. The method for biochemical treatment of town sewage with cooperative sludge reduction as claimed in claim 1, wherein: the garbage carbon black is a solid-phase product obtained after organic matters in the garbage carbon black are pyrolyzed in the process of cracking the urban household garbage.
4. The method for biochemical treatment of town sewage with cooperative sludge reduction as claimed in claim 3, wherein: the mass ratio of the added amount of the garbage carbon black to the dry-based sludge is as follows: mGarbage carbon black:MDry basis sludge＝0.3～1.0:1.0。
5. The method for biochemical treatment of town sewage with cooperative sludge reduction as claimed in claim 3, wherein: the particle size of the garbage carbon black is 30-300 mu m, and the specific surface area>20m2/g。
6. The method for biochemical treatment of town sewage with cooperative sludge reduction as claimed in claim 3, wherein: the density of the garbage carbon black is less than or equal to 1.1 kg/L.
7. The method for biochemical treatment of town sewage with cooperative sludge reduction as claimed in claim 3, wherein: the hydrophobic angle of the garbage carbon black is as follows: 40 ° < hydrophobic angle <90 °.
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5217616A (en) * 1991-12-06 1993-06-08 Allied-Signal Inc. Process and apparatus for removal of organic pollutants from waste water
US6881339B1 (en) * 1997-10-30 2005-04-19 Sud-Chemie Ag Process for treating industrial and municipal waste water highly loaded with ammonium
CN102616922A (en) * 2012-04-23 2012-08-01 重庆康达环保产业（集团）有限公司 PACT (Production Analysis Control Technique) novel process for treating non-biodegradable waste water by using circularly-reproducible powdered activated carbon
CN105060598A (en) * 2015-08-04 2015-11-18 重庆杰润科技有限公司 Chemical pharmacy wastewater pretreatment system
CN105712539A (en) * 2016-04-11 2016-06-29 浙江碧源环保科技有限公司 Deep treatment system and process for coked phenol and cyanide wastewater
CN105921497A (en) * 2016-06-17 2016-09-07 北京神雾环境能源科技集团股份有限公司 Resourceful comprehensive treatment method and system for household garbage
CN107021597A (en) * 2017-06-20 2017-08-08 湖北君集水处理有限公司 Improve the system and method for biochemical and deeply treating wastewater using Powdered Activated Carbon
CN110075792A (en) * 2019-04-11 2019-08-02 兰州资源环境职业技术学院 A kind of preparation method and application based on house refuse charcoal adsorbent material

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5217616A (en) * 1991-12-06 1993-06-08 Allied-Signal Inc. Process and apparatus for removal of organic pollutants from waste water
US6881339B1 (en) * 1997-10-30 2005-04-19 Sud-Chemie Ag Process for treating industrial and municipal waste water highly loaded with ammonium
CN102616922A (en) * 2012-04-23 2012-08-01 重庆康达环保产业（集团）有限公司 PACT (Production Analysis Control Technique) novel process for treating non-biodegradable waste water by using circularly-reproducible powdered activated carbon
CN105060598A (en) * 2015-08-04 2015-11-18 重庆杰润科技有限公司 Chemical pharmacy wastewater pretreatment system
CN105712539A (en) * 2016-04-11 2016-06-29 浙江碧源环保科技有限公司 Deep treatment system and process for coked phenol and cyanide wastewater
CN105921497A (en) * 2016-06-17 2016-09-07 北京神雾环境能源科技集团股份有限公司 Resourceful comprehensive treatment method and system for household garbage
CN107021597A (en) * 2017-06-20 2017-08-08 湖北君集水处理有限公司 Improve the system and method for biochemical and deeply treating wastewater using Powdered Activated Carbon
CN110075792A (en) * 2019-04-11 2019-08-02 兰州资源环境职业技术学院 A kind of preparation method and application based on house refuse charcoal adsorbent material

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