CN111233286A - Aerobic biochemical treatment tail water retreatment process for APMP pulping wastewater - Google Patents
Aerobic biochemical treatment tail water retreatment process for APMP pulping wastewater Download PDFInfo
- Publication number
- CN111233286A CN111233286A CN202010237567.6A CN202010237567A CN111233286A CN 111233286 A CN111233286 A CN 111233286A CN 202010237567 A CN202010237567 A CN 202010237567A CN 111233286 A CN111233286 A CN 111233286A
- Authority
- CN
- China
- Prior art keywords
- aerobic biochemical
- tail water
- biochemical treatment
- wastewater
- aerobic
- 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.)
- Pending
Links
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
- 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
- C02F1/66—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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a retreatment process of tail water from aerobic biochemical treatment of APMP pulping waste water, which mainly aims at high alkalinity and total alkalinity of aerobic effluent (HCO)3 ‑Calculated) is 90-120mmol/L, the PH value is 8-9, sulfuric acid is adopted to neutralize partial alkalinity, the PH is reduced to 6-7, the removal rate of aerobic biochemical wastewater reaches 70%, then effluent is subjected to coagulating sedimentation and advanced oxidation, the use of chemicals and the generation amount of chemical sludge can be effectively reduced, the salt content in discharged wastewater is reduced, and the operation cost is saved.
Description
Technical Field
The invention belongs to the technical field of environmental protection, and particularly relates to a retreatment process of tail water from aerobic biochemical treatment of APMP pulping wastewater.
Background
The APMP pulping process, namely alkaline hydrogen peroxide chemico-mechanical pulping, has the advantages of high APMP pulping yield, high pulp strength, less pollution, low energy consumption and the like compared with chemical pulping. A plurality of enterprises adopt APMP pulping technology, APMP pulping becomes a new technology growth point in the pulping and papermaking industry in China, and the application prospect is wide. However, the problem to be solved is that the wastewater generated by APMP pulping has high COD load, the concentration can reach 18000-20000mg/L, and the generation amount of COD per ton pulp can reach 180-220kg, which is typical high-concentration organic wastewater.
The conventional APMP pulping wastewater treatment process flow comprises the following steps: anaerobic process → aerobic process → coagulating sedimentation → advanced oxidation → discharge after reaching the standard. Anaerobic biological treatment: a large amount of suspended solids are removed in the working section through a wastewater collecting well → a fine grid → primary sedimentation, and the wastewater enters an anaerobic system for anaerobic biological treatment after pretreatment; aerobic biological treatment: the wastewater after anaerobic treatment enters an aerobic system, and organic matters in the wastewater are removed by using aerobic microorganisms in activated sludge; coagulating sedimentation: carrying out coagulating sedimentation on the wastewater subjected to aerobic treatment by adopting polymeric ferric sulfate or aluminum ferric sulfate diacetate to remove residual colloidal substances and suspended substances; advanced oxidation: the Fenton method is adopted to catalyze hydrogen peroxide to generate hydroxyl radicals by utilizing ferrous sulfate under an acidic condition, and organic matters in the wastewater are oxidized to meet the standard discharge requirement of the wastewater.
The wastewater produced by APMP pulping has COD of 1800-2000mg/L, 10-12 tons of water for pulp production, and the conventional wastewater treatment process of 'primary sedimentation → anaerobic biochemistry → aerobic biochemistry → coagulating sedimentation → advanced oxidation' can reach the increasingly strict environmental-protection discharge standard. The COD of aerobic biochemical effluent is 800-1200mg/L, which causes the subsequent coagulation sedimentation advanced oxidation to consume a large amount of chemicals, the salt content in sewage is greatly increased, a large amount of generated chemical sludge is difficult to dispose, and the operation cost is high.
In the APMP pulping wastewater treatment process, the COD value of wastewater treated by aerobic organisms is 800-1200mg/L, the alkalinity (calculated as HCO3 < - >) is 90-120mmol/L, and the pH value is 8.45-9.00. due to the excessively high alkalinity and pH of aerobic effluent, the aerobic biological reaction is not completely carried out, so that the addition of chemicals in the subsequent coagulation precipitation and advanced oxidation sections is increased sharply, a large amount of chemical sludge is generated, the treatment is difficult, and the salt content in the discharged wastewater is also increased greatly.
Disclosure of Invention
In order to solve the problems of incomplete biochemical reaction and low removal rate in the aerobic biochemical treatment of the APMP pulping waste water, the invention provides a retreatment process of tail water in the aerobic biochemical treatment of the APMP pulping waste water. The pH value of aerobic effluent is adjusted by sulfuric acid, the alkalinity of aerobic biochemical tail water is controlled, the aerobic biochemical treatment is continuously carried out on the treated biochemical tail water, the removal rate reaches 70-80%, the use amount of chemicals for subsequent coagulation sedimentation and advanced oxidation is reduced, the generation amount of chemical sludge is reduced, and the wastewater treatment cost is saved.
In order to solve the technical problems, the invention adopts the following technical scheme:
a conventional APMP pulping waste water is treated by anaerobic and aerobic organisms, the pH value of the aerobic biochemical tail water is 8.45-9.00, the alkalinity reaches 90-120mmol/L, the aerobic organism treatment is restricted to be completely carried out, and the pH value of the aerobic organism treated waste water is regulated by sulfuric acid to be controlled at 6-7 and the alkalinity is less than 60 mmol/L.
Further, after the pH value of the aerobic biochemical tail water is adjusted, blowing aeration is carried out to blow off the dissolved carbon dioxide in the wastewater, and the retention time of the aeration is 30-60 min.
Furthermore, aerobic biological treatment is carried out on the tail water after the aerobic biological treatment through aeration treatment by adopting an activated sludge process, the sludge load of the activated sludge process is controlled to be 0.1-0.2KgCOD/KgMLSS, and the COD removal rate of the waste water treated by the aerobic activated sludge process can reach 70-80%.
Furthermore, the wastewater treated by the aerobic activated sludge process is coagulated by adopting polymeric ferric sulfate or aluminum ferric sulfate diacetate, and the PH value of the coagulating sedimentation effluent is controlled to be 3-4.5.
And further, performing advanced oxidation treatment on the coagulating sedimentation effluent, namely a Fenton method, adopting ferrous sulfate as a catalyst, catalyzing hydrogen peroxide to generate hydroxyl radicals, oxidizing the coagulating sedimentation effluent to remove residual organic matters, and adjusting the pH of the effluent subjected to advanced oxidation by the Fenton method to 6-9 by using sodium hydroxide.
The invention has the following beneficial effects:
1. after the pulping waste water is treated by anaerobic and aerobic organisms, the aerobic biochemical tail water has higher alkalinity, the PH value of the aerobic biochemical tail water is increased, the improvement of the aerobic biochemical removal rate is restricted, and the COD of the aerobic biochemical tail water is usually 800-1200 mg/L. The invention adopts sulfuric acid to adjust the PH value and control the PH value to be 6-7, the alkalinity of the biochemical tail water is greatly reduced, the removal rate of the pretreated wastewater can reach 70-80 percent by aerobic biochemical treatment by an activated sludge process, and the COD of the treated wastewater can be reduced to 240-360 mg/L.
2. The COD of biochemical tail water effluent treated by conventional anaerobic and aerobic biological treatment is 800-1200mg/L, polymeric ferric sulfate, aluminum ferric sulfate diacetate coagulation treatment and Fenton oxidation treatment are adopted, and the amount of chemical sludge produced per ton of water is 2.5 kg (100% dryness). After the aerobic biochemical tail water is treated by the process, the chemical sludge production is only 0.5 kg (100 percent dryness), the reduction is 80 percent, and the salt content of the waste water discharged outside can be reduced by more than 60 percent.
3. Compared with the conventional APMP wastewater treatment process, the process has the advantages that the operation cost can be saved by 35-40%, the addition of chemicals can be reduced by more than 60%, and the process has good environmental benefit and economic benefit.
Detailed Description
The present invention is further described with reference to the following specific examples, which are intended to be illustrative only and not to be limiting of the scope of the invention, as numerous insubstantial modifications and variations can be made by those skilled in the art based on the teachings herein.
Taking APMP pulp making enterprise as an example, the enterprise produces 520 tons of APMP pulp per day and 6000m of wastewater per day3The existing treatment process of the enterprise wastewater adopts anaerobic → aerobic → ferric aluminum sulfate coagulation → Fenton advanced oxidation treatment → up-to-standard discharge, biochemical tail water COD1164mg/L, total alkalinity of 110mg/L and pH value of 8.68.
The process for reprocessing the aerobic biochemical tail water by adopting the process comprises the following steps:
(1) regulating aerobic biochemical tail water of the APMP pulping waste water by using sulfuric acid, wherein the pH value is 6.70, and the total alkalinity is 58 mmol/L;
(2) adjusting the pH value, removing part of alkalinity of biochemical tail water of APMP pulping wastewater, and performing aeration stripping on soluble carbon dioxide in the wastewater in a micropore bottom aeration mode, wherein the retention time of bottom aeration stripping is 48 min;
(3) aerobic biochemical tail water with dissolved carbon dioxide removed by aeration stripping at the bottom is treated by an activated sludge method, and the sludge load of aerobic biochemical treatment is controlled to be 0.15 KgCOD/KgMLSS;
(4) the COD of the wastewater subjected to the aerobic biochemical treatment by the aerobic activated sludge method is reduced to 350 mg/L;
(5) COD of the wastewater after the aerobic biochemical effluent is subjected to coagulation treatment by adopting aluminum ferric sulfate diacetate is reduced to 81 mg/L;
(6) after the coagulation of the aluminum ferric sulfate, the effluent is subjected to high-efficiency oxidation treatment by a Fenton method, the pH of the wastewater subjected to high-grade oxidation treatment is adjusted to 7.5 by using sodium hydroxide, and after precipitation separation, the COD is reduced to 29mg/L and is discharged after reaching the standard.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. An aerobic biochemical treatment tail water retreatment process for APMP pulping waste water, which is characterized in that: the method comprises the following steps:
(1) neutralizing the pH value of aerobic biochemical tail water of APMP pulping waste water to 6.0-7.0 by using sulfuric acid;
(2) aerating at the bottom of the micropores to blow off soluble carbon dioxide in the wastewater;
(3) performing aerobic biochemical treatment on the activated sludge;
(4) coagulating the aerobic biochemical treatment tail water by adopting a flocculating agent of ferric aluminum sulfate bi-acid or polymeric ferric sulfate and then carrying out precipitation treatment;
(5) and treating the effluent after coagulation by adopting a Fenton method.
2. The aerobic biochemical treatment tail water retreatment process of APMP pulping waste water according to claim 1, characterized in that: the tail water of the APMP pulping waste water aerobic biochemical treatment is HCO3 -The total alkalinity is 90-120mmol/L, and the PH value is 8.45-9.00.
3. The aerobic biochemical treatment tail water retreatment process of APMP pulping waste water according to claim 1, characterized in that: and (2) neutralizing aerobic biochemical tail water in the APMP pulping wastewater by using sulfuric acid to control the total alkalinity of the aerobic biochemical tail water to be below 60 mmol/L.
4. The aerobic biochemical treatment tail water retreatment process of APMP pulping waste water according to claim 1, characterized in that: and (3) in the step (2), the aeration retention time of the dissolved carbon dioxide in the wastewater is blown off by using the aeration at the bottom of the micropore for 30-60 min.
5. The aerobic biochemical treatment tail water retreatment process of APMP pulping waste water according to claim 1, characterized in that: and (3) controlling the sludge load to be 0.1-0.2KgCOD/KgMLSS (delta-beta-cyclodextrin) d during aerobic biochemical treatment.
6. The aerobic biochemical treatment tail water retreatment process of APMP pulping waste water according to claim 1, characterized in that: and (4) the pH value of effluent obtained after coagulating sedimentation in the step (4) is 3-4.5.
7. The aerobic biochemical treatment tail water retreatment process of APMP pulping waste water according to claim 1, characterized in that: and (3) treating the effluent coagulated in the step (5) by using a Fenton method, and adjusting the pH value of the wastewater treated by using the Fenton method to 6-9 by using sodium hydroxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010237567.6A CN111233286A (en) | 2020-03-30 | 2020-03-30 | Aerobic biochemical treatment tail water retreatment process for APMP pulping wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010237567.6A CN111233286A (en) | 2020-03-30 | 2020-03-30 | Aerobic biochemical treatment tail water retreatment process for APMP pulping wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111233286A true CN111233286A (en) | 2020-06-05 |
Family
ID=70875609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010237567.6A Pending CN111233286A (en) | 2020-03-30 | 2020-03-30 | Aerobic biochemical treatment tail water retreatment process for APMP pulping wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111233286A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224936A (en) * | 2008-01-29 | 2008-07-23 | 北京盖雅环境科技有限公司 | Process for treating coking wastewater |
| CN101863532A (en) * | 2010-06-03 | 2010-10-20 | 岳阳纸业股份有限公司 | Film processing method of chemico-mechanical pulp squeezed filtrate |
| CN101891346A (en) * | 2010-07-15 | 2010-11-24 | 中国林业科学研究院林产化学工业研究所 | Discharge-reducing method for biologically treating chemical-mechanical pulping waste water |
| CN101955305A (en) * | 2010-10-19 | 2011-01-26 | 江苏省环境科学研究院 | A kind of paper waste combined treatment process |
| CN102659290A (en) * | 2012-05-25 | 2012-09-12 | 中国林业科学研究院林产化学工业研究所 | Method for advanced treatment of high-concentration chemi-mechanical pulp effluent by catalytic oxidation |
| CN105692967A (en) * | 2014-11-24 | 2016-06-22 | 中国石油化工股份有限公司 | PVA production apparatus wastewater treatment method |
| CN107879555A (en) * | 2017-11-22 | 2018-04-06 | 焦作瑞丰纸业有限公司 | APMP pulping sewage integrated treatment process |
-
2020
- 2020-03-30 CN CN202010237567.6A patent/CN111233286A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101224936A (en) * | 2008-01-29 | 2008-07-23 | 北京盖雅环境科技有限公司 | Process for treating coking wastewater |
| CN101863532A (en) * | 2010-06-03 | 2010-10-20 | 岳阳纸业股份有限公司 | Film processing method of chemico-mechanical pulp squeezed filtrate |
| CN101891346A (en) * | 2010-07-15 | 2010-11-24 | 中国林业科学研究院林产化学工业研究所 | Discharge-reducing method for biologically treating chemical-mechanical pulping waste water |
| CN101955305A (en) * | 2010-10-19 | 2011-01-26 | 江苏省环境科学研究院 | A kind of paper waste combined treatment process |
| CN102659290A (en) * | 2012-05-25 | 2012-09-12 | 中国林业科学研究院林产化学工业研究所 | Method for advanced treatment of high-concentration chemi-mechanical pulp effluent by catalytic oxidation |
| CN105692967A (en) * | 2014-11-24 | 2016-06-22 | 中国石油化工股份有限公司 | PVA production apparatus wastewater treatment method |
| CN107879555A (en) * | 2017-11-22 | 2018-04-06 | 焦作瑞丰纸业有限公司 | APMP pulping sewage integrated treatment process |
Non-Patent Citations (6)
| Title |
|---|
| （美）R.E.斯皮思 著；李亚新 译: "《工业废水的厌氧生物技术》", 30 April 2001, 中国建筑工业出版社 * |
| 张甲耀 等主编: "《环境微生物学 下册》", 31 December 2008, 武汉大学出版社 * |
| 彭致圭 主编: "《技术创新-企业腾飞的翅膀》", 31 May 2008, 山西人民出版社 * |
| 贾卫华 孟庆彬: "APMP制浆废水处理工程应用", 《环境工程》 * |
| 郭正，张宝军 主编: "《水污染控制技术实验实训指导》", 31 August 2007, 中国环境科学出版社 * |
| 饶品华 等主编: "《可持续发展导论》", 31 July 2015, 哈尔滨工业大学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101618919A (en) | Method for processing waste water produced by caprolactam ammoximation process | |
| CN102452763B (en) | Method for treating ethylene waste alkali liquor | |
| CN104609680A (en) | Textile dyeing wastewater treatment and reclamation technique | |
| CN110668649A (en) | Corrugated paper pulping wastewater treatment system and process | |
| CN103787544A (en) | System for treating DCP waste water | |
| CN111499120A (en) | Treatment system and method for denitration catalyst regeneration wastewater | |
| CN112919726A (en) | Wastewater treatment process for producing hydrogen peroxide | |
| CN111875171B (en) | Duck breeding wastewater treatment process and resource recovery method | |
| CN213623721U (en) | Hydrogen peroxide solution waste water processing system | |
| CN106957132B (en) | Method and device for treating printing and dyeing wastewater by combining rotary oxidation ditch process with ozone activated carbon | |
| CN111233286A (en) | Aerobic biochemical treatment tail water retreatment process for APMP pulping wastewater | |
| US11180390B2 (en) | Method for treating and recycling waste slurry in bobbin paper production | |
| CN216584625U (en) | Phosphoric acid method active carbon production effluent disposal system | |
| CN112299655B (en) | Novel treatment process for aged landfill leachate | |
| CN103787545A (en) | Method of treating DCP waste water | |
| CN203187488U (en) | System for treating DCP (dicalcium phosphate) wastewater | |
| CN115536206A (en) | Advanced treatment combined process for chemical degradation-resistant sewage | |
| CN111470722A (en) | Treatment method of rubber processing wastewater difficult to biodegrade | |
| CN112759149A (en) | Treatment method of high-concentration garlic slicing wastewater | |
| CN112174447A (en) | Phosphoric acid method active carbon production effluent disposal system | |
| CN221319645U (en) | Reinforced ammoximation caprolactam production wastewater pretreatment device | |
| CN211814033U (en) | Aerobic MBR (membrane bioreactor) and advanced treatment system for high-concentration organic wastewater | |
| CN219860923U (en) | High-concentration organic wastewater treatment system | |
| CN215592706U (en) | A high-efficient desulphurization unit for leather waste water treatment | |
| CN219620994U (en) | System suitable for high-concentration organic sewage and wastewater treatment |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200605 |