CN107176711B - Process for efficiently recovering copper in high-concentration berberine wastewater - Google Patents

Process for efficiently recovering copper in high-concentration berberine wastewater Download PDF

Info

Publication number
CN107176711B
CN107176711B CN201710261161.XA CN201710261161A CN107176711B CN 107176711 B CN107176711 B CN 107176711B CN 201710261161 A CN201710261161 A CN 201710261161A CN 107176711 B CN107176711 B CN 107176711B
Authority
CN
China
Prior art keywords
wastewater
copper
reaction
concentration
berberine
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710261161.XA
Other languages
Chinese (zh)
Other versions
CN107176711A (en
Inventor
王敏
谢元华
朱彤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northeastern University China
Original Assignee
Northeastern University China
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northeastern University China filed Critical Northeastern University China
Priority to CN201710261161.XA priority Critical patent/CN107176711B/en
Publication of CN107176711A publication Critical patent/CN107176711A/en
Application granted granted Critical
Publication of CN107176711B publication Critical patent/CN107176711B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C22B15/0063—Hydrometallurgy
    • C22B15/0084—Treating solutions
    • C22B15/0089—Treating solutions by chemical methods
    • C22B15/0091—Treating solutions by chemical methods by cementation
    • 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
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • 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
    • 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
    • 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
    • C02F1/70—Treatment of water, waste water, or sewage by reduction
    • C02F1/705—Reduction by metals
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)
  • Removal Of Specific Substances (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Abstract

The invention belongs to the field of water treatment application and resource utilization, and relates to a process for efficiently recovering copper in high-concentration berberine waste water. The process comprises the steps of adding berberine copper-containing wastewater into a water treatment flocculant and a Polyacrylamide (PAM) mixed reagent, and intensively stirring at 1000-; adding NaOH, and adjusting the pH value of the wastewater to 2-3.5; the precipitate and suspended matter are then removed by filtration and centrifugation. After the obtained wastewater is heated, iron powder is slowly added. After the reaction is finished, filtering to obtain copper simple substance precipitate, and allowing effluent to enter a secondary reaction; reacting for 20-30min, filtering and precipitating, and discharging the supernatant reaching the standard. The process has the advantages of simple operation, stable operation, low cost, high purity of the recovered copper simple substance, good economic benefit and good application prospect.

Description

Process for efficiently recovering copper in high-concentration berberine wastewater
Technical Field
The invention belongs to the field of water treatment application and resource utilization, and relates to a simple and efficient process for recovering copper in high-concentration copper-containing berberine wastewater by a flocculation and iron reduction method.
Background
The berberine copper-containing wastewater is mainly derived from a copper removal process link in berberine generation, is a mixture of waste liquid of copper removal reaction and berberine crude product cleaning liquid, and mainly comprises berberine, copper ions and reaction intermediate products. The berberine copper-containing wastewater is typical chemical synthesis pharmaceutical wastewater, and is dark green solution, so that the berberine copper-containing wastewater has strong acidic pungent taste, the pH value is about 1, the concentration of organic matters is as high as tens of thousands to hundreds of thousands of mg/L, and the average value of the content of copper chloride in the wastewater is 1.5-2 ten thousands of mg/L. Because the concentration of copper ions in the wastewater is high, the wastewater is discharged to a sewage treatment plant without pretreatment, and huge impact is brought to the biological treatment process of the subsequent sewage treatment plant. Meanwhile, the waste water has higher content of copper ions, so the waste water has higher recycling value.
Therefore, the copper in the berberine copper-containing wastewater is recovered, so that resource utilization can be realized on one hand, and the difficulty in subsequent wastewater treatment can be reduced on the other hand. At present, in order to recover copper ions in berberine production wastewater, an invention patent (Zengnung et al, ZL201310042379.8) discloses a process for preparing basic copper chloride by utilizing berberine copper-containing wastewater, and 99.9% of copper in the wastewater can be recovered. However, the copper chloride hydroxide recovered by the method needs to be further treated, and berberine and acid in water need to be further treated, so that the process is more complicated; shokkniu et al used electrochemical bipolar method to treat high concentration copper-containing berberine pharmaceutical wastewater (environmental engineering Proc., 2011, 1 (4): 295-. However, in practical application of the method, electrodes are easy to scale, further reaction is affected, and production cannot be carried out. The preparation method comprises the steps of adopting an iron-carbon micro-electrolysis cell-ion exchange column combined process to recover copper from berberine pharmaceutical wastewater in the case of Zuixiayu and the like, wherein the removal rate of copper ions reaches about 97%, the removal rate of organic matter concentration reaches over 44%, and 13kg of copper can be recovered from each ton of wastewater (according to the technical report of environmental engineering, 2012,2 (4): 319-. However, the method for treating copper-containing berberine wastewater cannot be effectively operated for a long time in practical engineering, because the wastewater contains colloidal substances, when the pH value in the wastewater is adjusted to be more than 3, the colloidal substances are changed into solid state from a dissolved state, and the reaction process of reducing copper ions into elemental copper is influenced, so that the reaction is insufficient; on the other hand, the separated jelly is adhered to the wall of the reactor, and the blockage of a wastewater conveying pipeline is easily caused, so that the subsequent treatment of the wastewater is influenced.
Based on the problem that jelly in the actual recovery process of copper-containing wastewater affects the reaction process and the reaction efficiency, the method firstly removes the jelly organic matters by flocculation and then carries out copper recovery on the berberine copper-containing wastewater by a process of replacing copper ions by a secondary iron simple substance. In the existing reports, a process for recovering the berberine copper-containing wastewater by combining flocculation and secondary iron reduction is not available.
Disclosure of Invention
The invention provides a process for efficiently recovering copper in high-concentration berberine waste water, which has the advantages of simple operation, stable operation, low cost, high purity of recovered copper simple substance, good economic benefit and good application prospect.
The invention relates to a process for efficiently recovering copper in high-concentration berberine waste water, which adopts the following technical scheme:
(1) uniformly mixing the berberine copper-containing wastewater in a production period, and adding a water treatment flocculant and a Polyacrylamide (PAM) mixed reagent according to the COD concentration, wherein the water treatment flocculant comprises aluminum sulfate, aluminum chloride, ferric sulfate, ferric chloride, polymeric ferric sulfate, polymeric aluminum chloride, polymeric aluminum ferric chloride and other flocculants; stirring strongly at 1000-;
(2) adding NaOH, fully stirring and uniformly mixing, adjusting the pH value of the wastewater to 2-3.5, and standing for 30 min;
(3) and (4) carrying out centrifugal separation on the wastewater by adopting a filter type centrifugal machine, wherein the rotating speed is 3000-5000r/min, and the centrifugal time is 10-25min, so as to remove precipitates and suspended matters. The supernatant fluid after centrifugal separation enters a first-stage iron reduction reaction;
(4) heating the wastewater to 75-95 ℃; then according to Cu in the wastewater2+According to the concentration of the iron powder required by the reduction reaction, adding 10-40% of excessive iron powder in a slowly distributed manner. When the iron powder is added, the wastewater is continuously stirred, so that the iron powder and the wastewater are fully contacted. Adding all iron powder, continuously stirring and reacting at 80-95 ℃ for 20-50min, after the reaction is finished, filtering to obtain copper simple substance precipitate, and allowing the effluent to enter a secondary reaction; (2) and (3) adding 10-20% of the total amount of iron added in the first-stage reaction into the effluent after the first-stage reduction reaction at the temperature of 80-95 ℃, carrying out a second-stage reaction for 20-30min, filtering and precipitating, and discharging the supernatant reaching the standard.
The method takes high-concentration copper-containing berberine production wastewater as a treatment object, mainly adopts a flocculating agent to remove colloidal organic matters in the wastewater, then adopts cheap iron powder as a raw material, and reduces Cu in the wastewater through simple iron reduction2+The copper simple substance can be used for recovering and recycling the metal copper resource, and simultaneously can also remove colloidal organic matters in the wastewater and reduce COD in the wastewaterIn time, the blockage of the colloidal organic matters in the wastewater in the actual operation of a factory to the pipeline is reduced. The method can recover more than 99% of copper in the wastewater and Cu in the effluent2+The concentration is lower than 50mg/L, and the biodegradability of the wastewater is effectively improved.
Drawings
FIG. 1 is a process flow chart for efficiently recovering copper from high-concentration berberine waste water.
Detailed Description
Example 1 400mL of copper-containing berberine containing wastewater, Cu2+The concentration is 18000 mg/L, CODCrThe concentration was 87000mg/L, the initial pH was 0.1. Adding 10g of basic aluminum chloride, stirring for 20 minutes at the rotating speed of 2000r/min, then adding 0.4g of PAM coagulant aid, stirring for 10 minutes at the rotating speed of 1000r/min, then adding 5g of NaOH to adjust the pH value of the wastewater to 3.0, and standing for reaction for 30 minutes. Centrifuging at the rotating speed of 4000r/min for 20min, and collecting 320mL of supernatant waste liquid for primary reduction reaction. Heating the wastewater to 90 ℃, slowly adding 6.6g of iron powder with the purity of more than 95%, and continuously stirring and reacting for 30min at 500 r/min. Then, water is discharged and filtered to obtain elemental copper after the first-stage reaction, and the wastewater is subjected to a second-stage reduction reaction. First-order reaction effluent Cu2+The concentration was 53 mg/L. Before the second-stage reaction, heating the wastewater to 90 ℃, slowly adding 0.66g of iron powder with the purity of more than 95%, continuously stirring at 500r/min for reaction for 30min, discharging water, filtering to obtain a mixture of copper, iron and the like after the second-stage reaction, and discharging Cu in the water2+The concentration was 8.9mg/L and the CODCr concentration was 53000 mg/L.
Example 2400 mL of copper-containing berberine generating wastewater, Cu2+The concentration is 18000 mg/L, CODCrThe concentration was 87000mg/L, the initial pH was 0.1. Adding 8g of basic aluminum chloride, stirring for 30 minutes at the rotating speed of 3000r/min, then adding 0.2g of PAM coagulant aid, stirring for 10 minutes at the rotating speed of 500r/min, then adding 5.2g of NaOH to adjust the pH value of the wastewater to 3.5, and standing for reaction for 40 minutes. Centrifuging at the rotating speed of 5000r/min for 20min, and collecting 320mL of supernatant waste liquid for primary reduction reaction. Heating the wastewater to 75 ℃, slowly adding 5.1g of iron powder with the purity of more than 95%, and continuously stirring and reacting for 30min at 1000 r/min. Then water is discharged and filtered to obtain the first-stage reactionThe simple substance copper and the waste water are sent to a secondary reduction reaction tank. Cu in first-stage effluent2+The concentration was 131 mg/L. Maintaining the temperature of the second-stage reaction at 90 deg.C, slowly adding 0.51g of iron powder with purity of above 95%, stirring and reacting for 30min at 500r/min, discharging water, filtering to obtain mixture of copper and iron after the second-stage reaction, and discharging Cu from the second-stage water2+The concentration was 29mg/L and the CODCr concentration was 67000 mg/L.
Example 3400 mL of copper-containing Berberine production wastewater, Cu2+The concentration is 18000 mg/L, CODCrThe concentration was 87000mg/L, the initial pH was 0.1. Adding 10g of basic aluminum chloride, stirring for 30 minutes at the rotating speed of 3000r/min, then adding 0.4g of PAM coagulant aid, stirring for 10 minutes at the rotating speed of 500r/min, then adding 4.6g of NaOH to adjust the pH value of the wastewater to 2.5, and standing for reaction for 30 minutes. Centrifuging for 30min at the rotating speed of 5000r/min, and collecting 320mL of supernatant waste liquid for primary reduction reaction. Heating the wastewater to 90 ℃, slowly adding 6.6g of iron powder with the purity of more than 95%, and continuously stirring and reacting for 40min at 1000 r/min. And then discharging water, filtering to obtain elementary copper after the first-stage reaction, and conveying the wastewater to a second-stage reduction reaction tank. Cu in first-stage effluent2+The concentration was 461 mg/L. Maintaining the temperature of the second-stage reaction at 90 deg.C, slowly adding 1.11g of iron powder with purity of above 95%, stirring and reacting for 40min at 500r/min, discharging water, filtering to obtain mixture of copper and iron, etc., and discharging Cu from the second-stage reaction water2+The concentration was 46mg/L and the CODCr concentration was 67000 mg/L.

Claims (1)

1. A process for efficiently recovering copper in high-concentration berberine waste water is characterized by comprising the following steps,
(1) uniformly mixing the berberine copper-containing wastewater in a production period, and adding a water treatment flocculant and a Polyacrylamide (PAM) mixed reagent according to the COD concentration, wherein the water treatment flocculant comprises aluminum sulfate, aluminum chloride, ferric sulfate, ferric chloride, polymeric ferric sulfate, polymeric aluminum chloride and polymeric aluminum ferric chloride flocculant; stirring strongly at 1000-;
(2) adding NaOH, fully stirring and uniformly mixing, adjusting the pH value of the wastewater to 2-3.5, and standing for 30 min;
(3) centrifuging the wastewater by adopting a filter centrifuge at the rotating speed of 3000-;
(4) heating the wastewater to 75-95 ℃; then according to Cu in the wastewater2+According to the concentration, adding 10-40% excessive iron powder slowly in a distributed manner according to the amount of the iron powder required by the reduction reaction; when adding iron powder, continuously stirring the wastewater to ensure that the iron powder is fully contacted with the wastewater; adding all iron powder, continuously stirring and reacting at 80-95 ℃ for 20-50min, after the reaction is finished, filtering to obtain copper simple substance precipitate, and allowing the effluent to enter a secondary reaction;
(5) and (3) adding 10-20% of the total amount of iron added in the first-stage reaction into the effluent after the first-stage reduction reaction at the temperature of 80-95 ℃, carrying out a second-stage reaction for 20-30min, filtering and precipitating, and discharging the supernatant reaching the standard.
CN201710261161.XA 2017-04-20 2017-04-20 Process for efficiently recovering copper in high-concentration berberine wastewater Active CN107176711B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710261161.XA CN107176711B (en) 2017-04-20 2017-04-20 Process for efficiently recovering copper in high-concentration berberine wastewater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710261161.XA CN107176711B (en) 2017-04-20 2017-04-20 Process for efficiently recovering copper in high-concentration berberine wastewater

Publications (2)

Publication Number Publication Date
CN107176711A CN107176711A (en) 2017-09-19
CN107176711B true CN107176711B (en) 2020-10-16

Family

ID=59831994

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710261161.XA Active CN107176711B (en) 2017-04-20 2017-04-20 Process for efficiently recovering copper in high-concentration berberine wastewater

Country Status (1)

Country Link
CN (1) CN107176711B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108746602A (en) * 2018-05-26 2018-11-06 烟台大学 A method of preparing copper-clad iron powder using copper-containing wastewater

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102515389A (en) * 2011-12-09 2012-06-27 紫金矿业集团股份有限公司 Harmless treatment process for acidic copper-containing wastewater
CN103011360A (en) * 2012-12-07 2013-04-03 常州大学 Treatment method for industrial wastewater generated by copper wet-process smelting
CN103145227A (en) * 2013-03-25 2013-06-12 西安德奇水处理有限公司 Flocculation treatment method for copper-containing wastewater
CN103214121A (en) * 2013-04-27 2013-07-24 福建格林锘贝尔环保科技有限公司 Method for recycling copper and iron in acid mine wastewater by high-polymer chelating-precipitating agent two-step process
CN105347546A (en) * 2015-11-03 2016-02-24 湖北祥云(集团)化工股份有限公司 Treatment method and system of waste water produced by acid preparation from pyrite
CN105621744A (en) * 2016-03-07 2016-06-01 山东国信环境系统股份有限公司 Copper ore acid wastewater treatment and recovery device and method
CN105692833A (en) * 2016-03-08 2016-06-22 江苏国松环境科技开发有限公司 Process for treating wastewater in copper industry by using polymeric ferric sulfate

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013094694A (en) * 2011-10-28 2013-05-20 Vision Development Co Ltd Processing method for waste liquid containing metal atom, and adsorbent
JP5884493B2 (en) * 2012-01-11 2016-03-15 栗田工業株式会社 Treatment method for wastewater containing heavy metals

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102515389A (en) * 2011-12-09 2012-06-27 紫金矿业集团股份有限公司 Harmless treatment process for acidic copper-containing wastewater
CN103011360A (en) * 2012-12-07 2013-04-03 常州大学 Treatment method for industrial wastewater generated by copper wet-process smelting
CN103145227A (en) * 2013-03-25 2013-06-12 西安德奇水处理有限公司 Flocculation treatment method for copper-containing wastewater
CN103214121A (en) * 2013-04-27 2013-07-24 福建格林锘贝尔环保科技有限公司 Method for recycling copper and iron in acid mine wastewater by high-polymer chelating-precipitating agent two-step process
CN105347546A (en) * 2015-11-03 2016-02-24 湖北祥云(集团)化工股份有限公司 Treatment method and system of waste water produced by acid preparation from pyrite
CN105621744A (en) * 2016-03-07 2016-06-01 山东国信环境系统股份有限公司 Copper ore acid wastewater treatment and recovery device and method
CN105692833A (en) * 2016-03-08 2016-06-22 江苏国松环境科技开发有限公司 Process for treating wastewater in copper industry by using polymeric ferric sulfate

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
"复合絮凝剂应用于废水重金属去除效率的因素影响及其动力学研究";曾常华等;《江西科学》;20110430;第29卷(第2期);第177-181页 *
"铁粉置换分离电镀废水中的铜和镍";刘定富等;《环保科技》;20091231;第15卷(第1期);第1-3页 *

Also Published As

Publication number Publication date
CN107176711A (en) 2017-09-19

Similar Documents

Publication Publication Date Title
CN102311189B (en) System for treatment of acid mine drainage and resource recovery of iron, aluminum, copper and zinc in drainage
CN102079601B (en) Resource recovery and zero discharge process for treating rare-earth wet-method smelting wastewater
CN103466870A (en) Material recovery method of wastewater containing high-concentration ammonia-nitrogen and heavy metal ions and treatment system
CN106698745B (en) Method for recovering phosphorus in sewage
CN105110587A (en) Sludge pretreatment technology with desalting effect
CN101186423A (en) Heat treatment-dehydration-fertilizer making method for town sewage and sludge
CN113880340B (en) Method for purifying byproduct sodium chloride in organic silicon high-salt wastewater
CN111517407B (en) Method and device for recovering acidic extracting agent from acidic extraction system saponification wastewater
CN102442748B (en) Deep treatment method of naphthenic acid wastewater
CN106348545B (en) A kind of integrated treatment process of Clindamycin Hydrochloride production waste water
CN108341536A (en) A kind of processing method of epoxy resin production waste-water
CN103496809A (en) Electroplating wastewater electrochemical treatment and recycling comprehensive method
CN107176711B (en) Process for efficiently recovering copper in high-concentration berberine wastewater
WO2024060693A1 (en) Coal chemical wastewater treatment method and system
CN112939317A (en) Zero release and resourceful treatment system of industry high salt waste water
CN211595265U (en) Advanced treatment system for cyanogen-fluorine combined pollution wastewater
CN111960601A (en) System and method for synchronously treating copper-containing wastewater and organic wastewater
CN110818138A (en) Chlor-alkali wastewater treatment method
CN105110579A (en) Sewage disposal process
CN212403800U (en) Coal fired power plant desulfurization waste water integrated processing system
CN114835338A (en) Method for treating percolate concentrated solution of refuse landfill
CN212532804U (en) Catalyst recovery system of PTA oxidation residue
CN212375038U (en) Coal gasification fluorine-containing wastewater treatment device
CN109761383B (en) Recycling and treating method and recycling and treating system for heavy metal wastewater
CN105600979A (en) Method and apparatus for pretreatment of chlorinated resin polymerization mother liquor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant