CN1044999C - Comprehensive processing method of tannery waste water - Google Patents
Comprehensive processing method of tannery waste water Download PDFInfo
- Publication number
- CN1044999C CN1044999C CN91105917A CN91105917A CN1044999C CN 1044999 C CN1044999 C CN 1044999C CN 91105917 A CN91105917 A CN 91105917A CN 91105917 A CN91105917 A CN 91105917A CN 1044999 C CN1044999 C CN 1044999C
- Authority
- CN
- China
- Prior art keywords
- waste water
- aeration
- jet
- flow
- air supporting
- 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.)
- Expired - Fee Related
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Classifications
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The present invention discloses a method for treating tanning comprehensive waste water. The pH value of tanning comprehensive waste water is regulated to about 9 by acid liquor, and various indexes of treated waste water reach national discharge standards through continuous treating processes of air flotation, double-sectional fluidic aeration, precipitation and air flotation. The method of the present invention has the advantages of simple equipment, easy operation, few chemical dosages, short aeration time and no noise pollution, and therefore, the investment and operating cost of the method of the present invention are low, and the method is suitable for the tanning comprehensive waste water treatment of pigskin, cow leather, sheepskin, etc.
Description
The present invention relates to a kind of treatment technology of high concentrated organic wastewater, a kind of method that is applicable to that synthetic leather wastewaters such as pigskin, ox-hide, sheepskin are handled particularly is provided, belong to environmental protection technical field.
As everyone knows, synthetic leather wastewater is handled and is listed in one of brainstorm project of national China National Light Industrial Products Department.In the report and running example that synthetic leather wastewater is handled, chemical coagulation-sedimentation method no matter, the air supporting method, bio-disc system, the biological filtering tower combined working method, oxidation ditch process or blast aeration activated sludge process, or domestic certain famous tannery, its synthetic leather wastewater be with high-order gravity flow aeration-advection drown oneself-electrolysis-air supporting-uv disinfection-Sha filters and technology such as handles, it is big all to exist the dosing coagulant amount in various degree, aeration time is long, big and the investment of current consumption, floor space, the shortcoming that working cost is high, or because of in active sludge treatment, causing sludge bulking to cause the treatment effect of leather-making waste water undesirable easily.
The objective of the invention is to explore the method difficult problem that synthetic leather wastewater is handled, should reduced investment, take up an area of less, working cost is low, can improve the effect of improvement again, and reach fully and be better than discharging standards.
Task of the present invention is finished with following method and flow process: synthetic leather wastewater transfers to pH value about 9 with acid solution earlier, at the aluminium chlorohydroxide that carries out adding when one-level air supporting is handled 50～80PPM of coagulating agent aluminum content 10%, to remove the suspended substance of waste water, behind scurf and the fat, enter 1,2 sections jet-flow aeration ponds are carried out aerobic biochemical and are handled, under the effect of microorganism and oxygen, make in the waste water organism obtain decomposing, in settling tank, precipitate then, make and contain microbic activity mud and separate with waste water, supernatant liquor flows into secondary air-floatation and handles, and reaches the industrial wastewater discharge standard of country after treatment.
In the production control process, adopt and divide two sections jet-flow aeration, and two jet-flow aeration time was controlled at 10～12 hours, the equipment of aeration adopts water pump and jet aerator; When carrying out the secondary air-floatation processing, look settling tank supernatant liquor situation, the aluminium chlorohydroxide that can drop into 20～40PPM aluminum content 10% gets final product.
The invention has the advantages that: technical process is fairly simple, equipment configuration compact, rationally, handled easily and throw in coagulating agent for adding 1/10～1/8 of dose usually, during aeration with weak point, power saving, event gross investment and lower, the no sludge bulking disadvantage of working cost with avoid sound pollution.
Below in conjunction with accompanying drawing the present invention is described in further detail:
Accompanying drawing is the process flow sheet of present method.
A kind of synthetic leather wastewater, when its pollution concentration is:
PH： 9～13
COD
cr≤ 3000mg/l
BOD
5 ≤ 1500mg/l
SS ≤ 2000mg/l
S= ≤ 25mg/l
The synthetic leather wastewater of above-mentioned concentration range, inject acid solution through acid solution case (17) earlier, waste water is transferred to after PH is about 9, flow into one-level air flotation pool (1), and add by coagulation medicine-chest (15) and next coagulating agent and the flocculation agent of flocculation medicine-chest (16), discharge under the dissolved air water effect at 1 section dissolved air water reliever (2), handle through air supporting, flow into 1 section jet-flow aeration pond (3), under the aeration of jet water pump (13) and jet aerator (14), waste water carries out aerobic biochemical to be handled, and flows into 2 sections jet-flow aeration ponds (4) again, proceeds aerobic biochemical equally and handle under jet water pump (12) jet aerator (11) aeration.Waste water flows into settling tank (5) and precipitates after aerobic biochemical is handled, the active sludge that avales arrives sludge sump (5) through sludge pump (10) partial reflux to 1,2 sections jet-flow aeration ponds (3,4), part, supernatant liquor then flow to secondary air-floatation pond (6), add by the coagulating agent of one-level coagulation medicine-chest (15) and one-level flocculation medicine-chest (16) and flocculation agent, under the dissolved air water effect that 2 sections air supporting dissolved air water relievers (7) discharge, and will contain that small suspended substance is removed, waste water can reach national discharge index and disturb and put.(when secondary air-floatation was handled, the situation of looking settling tank (5) supernatant liquor can add coagulating agent and flocculation agent from two-stage coagulation medicine-chest (8) and secondary flocculation medicine-chest (9) in case of necessity).
Embodiment:
The synthetic leather wastewater water yield of certain tannery is 1070 ton per days, after the technical process of adopting present method to propose is recently handled, stable always, water outlet is limpid, wherein have through the city-level environmental monitoring station and carry out two days supervisory monitoring and checked and accepted mensuration in continuous three days, all index is better than national discharge index, and its raw water quality and processing back water quality are as follows:
| Raw water quality | Handle back water quality | GB | |
| PH | 7～13 | 6～8 | 6～9 |
| COD cr | 2268.0mg/l | 187.7mg/l | 300mg/l |
| BOD 5 | 1560.0mg/l | 55.0mg/l | 150mg/l |
| SS | 934.0mg/l | 36.0mg/l | 200mg/l |
| S= | 48.0mg/l | 0.025mg/l | 1mg/l |
| Total chromium | 10.32mg/l | Do not detect | 1.5mg/l |
Operation is handled and is consumed index:
1, power consumption 1.2Kwh/ ton waste water
2, alkali type aluminium oxide (aluminum content 10%) 80 gram/ton waste water
3, polyacrylamide (commercially available liquid, glue) 3 gram/ton waste water
Claims (3)
1, a kind of method of utilizing the Wastewater Treated by Activated Sludge Process synthetic leather wastewater is characterized in that:
A, waste water are adjusted to PH and about 9 enter one-level air supporting;
The aluminium chlorohydroxide that adds coagulating agent aluminum content 10% about 50～80PPM when B, one-level air supporting;
C, remove scurf, behind suspended substance and the fat, carry out 1,2 section jet-flow aeration pond and carry out aerobic biochemical and handle through one-level air supporting;
Organism obtains decomposing under the effect of microorganism and oxygen in D, the waste water, sends into settling tank again and precipitates; Its sedimentary active sludge partial reflux is to the aeration tank, and part is to sludge sump;
E, settling tank supernatant liquor flow into secondary air-floatation and handle the back qualified discharge.
2, method according to claim 1 is characterized in that adopting the jet-flow aeration of two sections of branches, and aeration time was controlled at 10～12 hours, and the equipment of aeration is water pump and jet aerator.
3, method according to claim 1 is characterized in that carrying out the aluminium chlorohydroxide that secondary air-floatation can drop into aluminum content 10% about 20～40PPM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91105917A CN1044999C (en) | 1991-08-23 | 1991-08-23 | Comprehensive processing method of tannery waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91105917A CN1044999C (en) | 1991-08-23 | 1991-08-23 | Comprehensive processing method of tannery waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1061201A CN1061201A (en) | 1992-05-20 |
| CN1044999C true CN1044999C (en) | 1999-09-08 |
Family
ID=4907405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91105917A Expired - Fee Related CN1044999C (en) | 1991-08-23 | 1991-08-23 | Comprehensive processing method of tannery waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1044999C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1049409C (en) * | 1994-08-04 | 2000-02-16 | 卢喜林 | Synchronous intensified jet method of biological dephenolized mud mixed nutrient sewage |
| CN100371258C (en) * | 2006-01-22 | 2008-02-27 | 徐浩昌 | Industrial waste water treatment method |
| CN101830595B (en) * | 2009-03-11 | 2013-06-26 | 江西金达莱环保股份有限公司 | Method for treating leather-making industrial wastewater |
| CN101979344B (en) * | 2010-10-28 | 2012-07-25 | 波鹰(厦门)科技有限公司 | Nano catalytic electrolysis technology and membrane technology-based leather wastewater treatment and recycling method |
| CN102010107B (en) * | 2010-12-24 | 2011-12-28 | 波鹰(厦门)科技有限公司 | Treatment and cyclic utilization device and method of tannery wastewater |
-
1991
- 1991-08-23 CN CN91105917A patent/CN1044999C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1061201A (en) | 1992-05-20 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| OR01 | Other related matters | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |