CN103387310A - Leather wastewater treating method - Google Patents
Leather wastewater treating method Download PDFInfo
- Publication number
- CN103387310A CN103387310A CN2013102031508A CN201310203150A CN103387310A CN 103387310 A CN103387310 A CN 103387310A CN 2013102031508 A CN2013102031508 A CN 2013102031508A CN 201310203150 A CN201310203150 A CN 201310203150A CN 103387310 A CN103387310 A CN 103387310A
- Authority
- CN
- China
- Prior art keywords
- waste water
- tank
- wastewater
- enter
- allowing
- 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
Images
Abstract
The invention discloses a leather wastewater treating method, comprising the following steps: (1) allowing chromium-containing wastewater to enter into a reaction tank for a reaction, subjecting settled sludge to press filtration with a filter press, separating chromium mud for separate treatment and allowing an obtained filtrate to enter into a regulating tank; (2) filtering rest wastewater (raw hide and skin washing water containing high-concentration Cl, alkaline depilation liming wastewater containing calcium and sulfur and degreasing wastewater containing grease and other saponified matters) with gratings and then allowing the rest wastewater to enter into the regulating tank; (3) adjusting the wastewater in the regulating tank (to a pH value of 7 to 8) and delivering the wastewater to an air floatation tank; (4) removing grease in the air floatation tank through air floatation, delivering obtained sludge to a sludge tank and allowing obtained liquid to enter into an anoxic tank for treatment; (5) allowing wastewater treated in the anoxic tank to enter into an aerobic tank; and (6) allowing wastewater treated in the aerobic tank to enter into a secondary sedimentation tank for treatment so as to obtain wastewater according with emission standards. With the method, the wastewater reaches national emission standards.
Description
Technical field
The present invention relates to field of waste water treatment, relate in particular to a kind of leather waste water treatment process.
Background technology
Leather production can be divided into wet practice and two parts of dry run, and wet practice is mainly prepares workshop section and tannin workshop section, and dry run is mainly finishing workshop section, and production link and main pollutent thereof see the following form.
The source of waste water: factory effluent mainly is comprised of following part: the raw hide washing water that contain high density Cl, the alkaline depilation liming waste water that contains calcium and sulphur, contain grease and other saponified degreasing waste water, contain chromic Chrome Tanning Wastewater and stuffing dyeing waste-water, wherein with degreasing waste water, depilation liming waste water and Chrome Tanning Wastewater, pollute the most serious.
The principal feature of waste water and difficulty in treatment: because having used in process of production a large amount of organic raw material, in waste water, organic content is high; Used dyestuff, tanning agent and other auxiliary agent in producing, the colourity of waste water is higher; Because of the sulfide in water and protein decomposition, waste water has denseer stink; Because containing sulfide and chromic salts in water, waste water has stronger toxicity; Because of starting material, the fat content in waste water is high.
Summary of the invention
The object of the present invention is to provide a kind of leather waste water treatment process, to solve the above-mentioned problems in the prior art.
Technical scheme provided by the invention is as follows:
A kind of leather waste water treatment process, comprise the steps:
(1) chromate waste water enters the reaction tank reaction, the pressure filter press filtration of the mud of precipitation, and chromium mud separates otherwise processed, and filtrate enters equalizing tank;
(2) all the other waste water (the raw hide washing water that contain high density Cl, contain the alkaline depilation liming waste water of calcium and sulphur, contains grease and other saponified degreasing waste water) after grid filtration, enter equalizing tank;
(3) waste water in equalizing tank after regulating (the pH value is 7-8), is sent into air flotation pool;
(4) grease is removed in air supporting in air flotation pool, and mud is delivered to sludge sump, and liquid enters anoxic pond and processes;
(5) waste water of processing through anoxic pond enters Aerobic Pond;
(6) waste water of processing through Aerobic Pond enters secondary sedimentation basins and processes.
In preferred embodiment of the present invention, the chromium mud of step (1) sludge filter press is delivered to the Wei Fei center.
In preferred embodiment of the present invention, the grid filtration of step (2) is divided into the twice grid, and wherein first step mechanical grille is deleted apart from being not more than 40mm.Second stage arc fine fack is not more than 10mm.
In preferred embodiment of the present invention, the mud of step (4) sludge sump is after the pressure filter press filtration, and filtrate is returned equalizing tank.
In preferred embodiment of the present invention, the nitrification liquid of step (6) Aerobic Pond is back to anoxic pond.
In preferred embodiment of the present invention, the mud of step (6) settling tank is delivered to sludge sump.
Seen from the above description, the present invention has overcome the reluctant difficult point of leather waste water, a kind of leather waste water treatment process is provided, first chromate waste water is entered the reaction tank reaction and remove chromium, prevent its murder by poisoning of microorganism to Aerobic Pond and anoxic pond, all the other waste water, through the grid removal of impurities, are distinguished upon mediation water quality, air supporting, anoxic, aerobic treatment afterwards again.Through after above processing, waste water can reach discharging standards.
Description of drawings
Fig. 1 is the schematic flow sheet that leather waste water of the present invention is processed.
Embodiment
Specific embodiments of the invention, its flow process is with reference to Fig. 1.
Reaction tank is used for chromium is precipitated, and uses reduction precipitation method (adding S-WAT and sheet alkali) that total chrome content in water outlet is controlled at below 1.5mg/L
The waste water of reaction tank is delivered to sludge filter press, and after press filtration, filtrate is delivered to equalizing tank, and chromium mud is delivered to the useless center processing of danger.
Grating tank is in order to things such as object-catching, onal meat, furs.Can establish first step mechanical grille deletes apart from being not more than 40mm.Second stage arc fine fack is not more than 10mm.
Equalizing tank is used for regulating pondage water quality, and regulating the water inlet pH value is 7-8.
Air flotation pool is used for the grease of waste water to be processed, and by aeration method, passes into pressurized air in waste water, and air dissolves in water, then discharges and forms bubble, takes lipid to water surface, reaches the purpose of oily water separation.Controlling its surface load is 0.8m
3/ m
2h，
The major function of anoxic pond is that the residence time that anoxic pond is set is 4.5h by denitrification make a return journey total nitrogen and ammonia nitrogen in dewatering.The major function of Aerobic Pond is that the COD load that Aerobic Pond is set is 0.8kgCOD/m by the organic pollution materials in the biochemical action removal water of supporting well bacterium
3d。Nitrification liquid is back to anoxic pond.
Secondary sedimentation basins make mud, moisture from, the settling tank surface load is 0.7m
3/ m
2h。Water after precipitation is sent into water collecting basin.
Discharging in this water collecting basin, or reuse after otherwise processed finally.
After the above processing of process, the main effluent quality of the waste water in water collecting basin sees the following form:
| Project | Unit | Effluent quality | Project | Unit | Effluent quality |
| COD | mg/L | 200～300 | Vegetable and animals oils | mg/L | 0.1～0.12 |
| pH | — | 8～8.5 | Total chromium | mg/L | 0.5～1.2 |
| SS | mg/L | 70～100 | Total hardness | mg/L | 400～600 |
| NH 3-N | mg/L | ≤10 | Specific conductivity | us/cm | 13000～18000 |
| Colourity | Doubly | 150～180 | ? | ? | ? |
Be that water quality has reached national sewage drainage standard.
Above are only a specific embodiment of the present invention, but design concept of the present invention is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the present invention, all should belong to the behavior of invading protection domain of the present invention.
Claims (6)
1. a leather waste water treatment process, comprise the steps:
(1) chromate waste water enters the reaction tank reaction, the pressure filter press filtration of the mud of precipitation, and chromium mud separates otherwise processed, and filtrate enters equalizing tank;
(2) all the other waste water, comprise the raw hide washing water that contain high density Cl, contains the alkaline depilation liming waste water of calcium and sulphur, contains grease and other saponified degreasing waste water, after grid filtration, enters equalizing tank;
(3) waste water in equalizing tank, through regulating the pH value after 7-8, is sent into air flotation pool;
(4) grease is removed in air supporting in air flotation pool, and mud is delivered to sludge sump, and liquid enters anoxic pond and processes;
(5) waste water of processing through anoxic pond enters Aerobic Pond;
(6) waste water of processing through Aerobic Pond enters secondary sedimentation basins and processes, and obtains the waste water of compound emission standard.
2. a kind of leather waste water treatment process as claimed in claim 1, it is characterized in that: the chromium mud of step (1) sludge filter press is delivered to the Wei Fei center.
3. a kind of leather waste water treatment process as claimed in claim 1, it is characterized in that: the grid filtration of step (2) is divided into the twice grid, and wherein first step mechanical grille is deleted apart from being not more than 40mm.Second stage arc fine fack is not more than 10mm.
4. a kind of leather waste water treatment process as claimed in claim 1, it is characterized in that: the mud of step (4) sludge sump is after the pressure filter press filtration, and filtrate is returned equalizing tank.
5. a kind of leather waste water treatment process as claimed in claim 1, it is characterized in that: the nitrification liquid of step (6) Aerobic Pond is back to anoxic pond.
6. a kind of leather waste water treatment process as claimed in claim 1, it is characterized in that: the mud of step (6) settling tank is delivered to sludge sump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102031508A CN103387310A (en) | 2013-05-27 | 2013-05-27 | Leather wastewater treating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102031508A CN103387310A (en) | 2013-05-27 | 2013-05-27 | Leather wastewater treating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103387310A true CN103387310A (en) | 2013-11-13 |
Family
ID=49531744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102031508A Pending CN103387310A (en) | 2013-05-27 | 2013-05-27 | Leather wastewater treating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103387310A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103663865A (en) * | 2013-11-27 | 2014-03-26 | 湖州织里童装发展有限公司 | Leather wastewater treatment process |
| CN104211793A (en) * | 2014-08-20 | 2014-12-17 | 罗明力 | Process of extracting proteins from tanning unhairing ash alkaline liquor |
| CN104478177A (en) * | 2014-12-26 | 2015-04-01 | 北京桑德环境工程有限公司 | Treatment method and system of tannery wastewater |
| CN106007204A (en) * | 2016-06-30 | 2016-10-12 | 浙江环耀环境建设有限公司 | Chromium-containing leather wastewater treatment process |
| CN106587539A (en) * | 2017-01-11 | 2017-04-26 | 江苏八达科技股份有限公司 | Tannery wastewater treatment method |
| CN110902957A (en) * | 2019-12-06 | 2020-03-24 | 山东海景天环保科技股份公司 | Method for realizing synchronous desulfurization and denitrification of leather wastewater by using sulfur autotrophic denitrification process |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2019521C1 (en) * | 1991-08-27 | 1994-09-15 | Фоминский Леонид Павлович | Method of water purification |
| CN101830595A (en) * | 2009-03-11 | 2010-09-15 | 深圳市金达莱环保股份有限公司 | Method for treating leather-making industrial wastewater |
| CN102010107A (en) * | 2010-12-24 | 2011-04-13 | 波鹰(厦门)科技有限公司 | Treatment and cyclic utilization device and method of tannery wastewater |
-
2013
- 2013-05-27 CN CN2013102031508A patent/CN103387310A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2019521C1 (en) * | 1991-08-27 | 1994-09-15 | Фоминский Леонид Павлович | Method of water purification |
| CN101830595A (en) * | 2009-03-11 | 2010-09-15 | 深圳市金达莱环保股份有限公司 | Method for treating leather-making industrial wastewater |
| CN102010107A (en) * | 2010-12-24 | 2011-04-13 | 波鹰(厦门)科技有限公司 | Treatment and cyclic utilization device and method of tannery wastewater |
Non-Patent Citations (1)
| Title |
|---|
| 仲惟雷: "制革废水处理工艺的研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103663865A (en) * | 2013-11-27 | 2014-03-26 | 湖州织里童装发展有限公司 | Leather wastewater treatment process |
| CN104211793A (en) * | 2014-08-20 | 2014-12-17 | 罗明力 | Process of extracting proteins from tanning unhairing ash alkaline liquor |
| CN104478177A (en) * | 2014-12-26 | 2015-04-01 | 北京桑德环境工程有限公司 | Treatment method and system of tannery wastewater |
| CN104478177B (en) * | 2014-12-26 | 2016-07-06 | 北京桑德环境工程有限公司 | A kind of processing method of leather-making waste water |
| CN106007204A (en) * | 2016-06-30 | 2016-10-12 | 浙江环耀环境建设有限公司 | Chromium-containing leather wastewater treatment process |
| CN106007204B (en) * | 2016-06-30 | 2019-03-29 | 浙江环耀环境建设有限公司 | A kind of leather waste water treatment technique containing chromium |
| CN106587539A (en) * | 2017-01-11 | 2017-04-26 | 江苏八达科技股份有限公司 | Tannery wastewater treatment method |
| CN106587539B (en) * | 2017-01-11 | 2021-02-02 | 江苏八达科技股份有限公司 | Treatment method of tannery wastewater |
| CN110902957A (en) * | 2019-12-06 | 2020-03-24 | 山东海景天环保科技股份公司 | Method for realizing synchronous desulfurization and denitrification of leather wastewater by using sulfur autotrophic denitrification process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103387310A (en) | Leather wastewater treating method | |
| CN101830595B (en) | Method for treating leather-making industrial wastewater | |
| EP2657197A1 (en) | Tanning wastewater treatment and reuse apparatus and method therefor | |
| CN110937761A (en) | High-efficiency treatment system and process for high-concentration oil-containing heavy metal waste liquid | |
| CN110451733A (en) | A kind for the treatment of process of leather-making waste water | |
| CN109052823A (en) | A kind of petrified waste water treatment process and system | |
| WO2012105847A1 (en) | System and method for the treatment of municipal and industrial wastewater and sludge | |
| CN102336501A (en) | Cold rolled steel coil wastewater treatment method | |
| CN208327758U (en) | A kind of petrochemical wastewater processing system | |
| WO2010009684A1 (en) | Method of chemical-mechanical treatment of waste waters from operation of tanneries | |
| CN212102447U (en) | High-efficiency treatment system for high-concentration oil-containing heavy metal waste liquid | |
| CN106495415B (en) | A kind of leather and fur process without drainage of waste water | |
| CN103387293A (en) | Reusing method for reclaimed water of leather wastewater | |
| CN111892257A (en) | Aluminum product production wastewater treatment system and treatment process thereof | |
| Mannucci et al. | Membrane Bioreactors treating tannery wastewaters: Limits and potentials for an optimized full-scale application | |
| KR20190018316A (en) | Method for treating soluble metal-working waste fluid | |
| CN203269731U (en) | Leather wastewater treatment device | |
| JP6285242B2 (en) | Waste water treatment facility and waste water treatment method | |
| Elsheikh | Tannery wastewater pre-treatment | |
| RU2530041C1 (en) | Method of purifying industrial waste water | |
| CN216687760U (en) | Sewage collection combined treatment system | |
| CN102642948A (en) | Industrial organic wastewater combined treatment method | |
| CN201842735U (en) | Tanning waste water treatment recycling device based on nano catalytic electrolysis technology and membrane technology | |
| Hareesh et al. | Comparative analysis of multiple effect evaporators and anaerobic digester (UASB) for an effective management of RO reject from tannery | |
| CN103787549B (en) | Method for pretreating tannery wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131113 |