CN103880221B - A kind of leather is wet ornamenting composite waste treatment for reuse technique in producing - Google Patents
A kind of leather is wet ornamenting composite waste treatment for reuse technique in producing Download PDFInfo
- Publication number
- CN103880221B CN103880221B CN201410148108.5A CN201410148108A CN103880221B CN 103880221 B CN103880221 B CN 103880221B CN 201410148108 A CN201410148108 A CN 201410148108A CN 103880221 B CN103880221 B CN 103880221B
- Authority
- CN
- China
- Prior art keywords
- composite waste
- ornamenting
- waste treatment
- reuse technique
- waste water
- 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
Links
Landscapes
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses during a kind of leather is produced the ornamenting composite waste treatment for reuse technique that wets, it is wherein wet that ornamenting composite waste specifically comprises neutralization, retanning is filled, dye, add ester composite waste, the treatment process of described composite waste can be summarized and is described as following steps: in waste water, add coagulating agent and flocculation agent, carry out flocculation sediment; After to be filtered, pH is to certain limit in acid adding adjustment, and adds oxygenant and carry out oxide treatment; After oxide treatment completes, carry out precipitation process by the steps precipitator method, processed waste water pH is to neutrality in acid adding adjustment subsequently, just recoverable.The present invention removes the pollutent in waste water by the technique adopting flocculence and oxidation style and combine, adopt the method for secondary sedimentation to remove pollutent in waste water further simultaneously, thus reach the object of purification of water quality and waste water treating and reutilizing.
Description
Technical field
The present invention relates to the treatment for reuse technique of waste water in leather industry, belong to waste water treating and reutilizing field.
Background technology
Leather industry is that sewage produces rich and influential family, and tanning sewage not only output is large, and complicated component, concentration are high, wherein COD
cr, BOD
5, sulfide, ammonia nitrogen, suspended substance etc. be very high, is a kind of trade effluent compared with refractory reason.Different with the specific requirement of product according to raw material skin, leather Production Flow Chart is also distinguished to some extent, therefore the waste water composition in production process also has bigger difference, and leather Production Flow Chart can be divided into beam house, tanning process, wet finishing workshop section, dry finishing workshop section on the whole.
Beam house mainly comprises immersion, degreasing, liming depilation, deliming, softening process; Tanning process includes pickling, tanning processes; Wet finishing workshop section includes retanning, neutralization, dyeing, stuffing operation; Dry finishing workshop section includes the operations such as drying, arrangement, covering with paint.
Beam house is the main source of tanning sewage, and quantity of wastewater effluent accounts for about 60% of process hides total Water, and pollution load accounts for about 70% of total release; Tanning process quantity of wastewater effluent accounts for about 5% of process hides total water consumption, and wet finishing workshop section then accounts for about 30%, and other are 5% years old; Wet finishing workshop section may be introduced except chromium except retanning stage, this workshop section also can introduce sodium bicarbonate, sodium acetate, fatting agent, dyestuff, auxiliary agent and organic acid etc., so workshop section has higher COD, BOD and colourity, pollutent complicated, hazardness are large, difficulty of governance is high, and therefore this workshop section is the most important thing in leather waste water process.
At present, the existing sewage treatment facility of domestic curriery, 95% be all reach country " integrated wastewater discharge standard " in secondary discharge standard, reach first discharge standard, and normal operation is few in number, be mostly because treatment process is unreasonable, working cost is too high, operational management is loaded down with trivial details, and can not normally run.In addition, have the tannery waste of some amount unprocessed or only after simple precipitation, directly enter river or lake, the even dell discharge had, causes great harm to ecotope and living environment.
In actual production process; by carrying out letter process to dyeing, stuffing, retanning composite waste; after making it to reach beam house, tanning process, dyeing, stuffing, the requiring with water of retanning workshop section; leather water of productive use can be reused; the living environment of water conservation and people to a certain extent, the maximized coordinating and unifying realizing economic benefit and ecological benefits.
Summary of the invention
The object of this invention is to provide a kind of total amount that can reduce composite wastewater in tanning industry, reduce sewage disposal expense, reduce in leather making process, leather produces the treatment for reuse technique of dyeing in the leather production of total water consumption, stuffing, retanning composite waste simultaneously.
For achieving the above object, technical scheme of the present invention is:
A kind of leather is wet ornamenting composite waste treatment for reuse technique in producing, and it is characterized in that, comprise step:
A, in composite waste, add a certain amount of coagulating agent and flocculation agent, carry out flocculation sediment, and carry out press filtration process;
The pH of b, adjustment filtrate, in certain limit, carries out oxide treatment subsequently to wherein adding oxygenant;
C, reacted after, first with binary highly basic adjustment pH between 7.5 ~ 11.0, and the precipitation of generation is carried out press filtration process; Subsequently to wherein adding unitary highly basic, adjustment pH is between 12.0 ~ 14.0 further, after stirring reaction, the precipitation of generation is carried out press filtration process;
D, pressure filtrate, pH is between 6.0 ~ 7.0 in acid adding adjustment.
Described coagulating agent is polymerize aluminum chloride, polyaluminium sulfate, polymer phosphate iron, poly-ferric chloride or poly-ferrous, and the concentration of the coagulating agent aqueous solution is 5 ~ 20%, and the volume ratio of its aqueous solution and waste water controls 2 ~ 10%.
Described flocculation agent is polyacrylamide, sodium polyacrylate or calcium polyacrylate (CPA), and the concentration of its aqueous solution controls between 1 ~ 5 ‰, and the add-on of flocculant aqueous solution controls in 2 ~ 6% of wastewater volume.
Described oxygenant is potassium permanganate, ozone, hydrogen peroxide, chlorine, oxymuriate, hypochlorite or Fenton reagent.
Described alkaline chemical precipitation adopts binary highly basic and unitary highly basic substep to add, and the method for steps precipitation, described binary highly basic is calcium hydroxide, magnesium hydroxide, calcium oxide or magnesium oxide.
Described unitary highly basic is sodium hydroxide or potassium hydroxide.
In described step b, the acid adjusting pH used is sulfuric acid, and its pH scope control is between 3.5 ~ 5.5.
Acid in described steps d is sulfuric acid or hydrochloric acid.
Advantage of the present invention is: two kinds of classics, easy wastewater processing technology are combined, and, secondary precipitation steps in the employing of alkaline chemical precipitation stage novelty processes waste water, easy and simple to handle, stable effluent quality, the contamination index such as suspended substance, BOD, COD, colourity in waste water can be reduced to the full extent, wherein the content of chromium (Cr) can be reduced to 1.5mg/L, achieves good waste water treating and reutilizing effect.
Embodiment
Below by by case concrete first, the present invention will be described.
Case study on implementation 1:
A, collect into mixing pit by wet ornamenting composite waste, in composite waste, add the process wastewater volume polymerize aluminum chloride than 3% (PAC) aqueous solution (its concentration is 10%), vigorous stirring, makes itself and composite waste fully react; In composite waste, add polyacrylamide (PAM) aqueous solution of volume ratio 3% again, the concentration of the PAM aqueous solution controls 3 ‰; After abundant stirring, press filtration process is carried out to waste water.
B, use sulfuric acid adjust the pH of filtered liquid about 4, subsequently to wherein adding the solid potassium permanganate (KMnO that mass ratio is 1 ‰
4), before adding potassium permanganate, need the solution being first made into 10%, then join in the supernatant liquor after pre-treatment, then vigorous stirring carries out oxidizing reaction 1.5h.
After c, reaction to be oxidized complete, use Ca (OH)
2pH is about 10.0 in adjustment, after vigorous stirring reaction, carries out press filtration process; Collect filtrate, in filtrate, add NaOH, adjustment pH is about 13.5 further, after abundant stirring reaction, carries out press filtration process.
D, get filtrate, use sulfuric acid (H
2sO
4) adjust pH between 6.0 ~ 7.0.
Case study on implementation 2:
A, collect into mixing pit by wet ornamenting composite waste, in composite waste, add process polyphosphoric acid iron (PFP) aqueous solution of wastewater volume than 4% (its concentration is 5%), vigorous stirring, makes itself and composite waste fully react; Add polyacrylamide (PAM) aqueous solution of volume ratio 4% more wherein, the concentration of the PAM aqueous solution controls 3 ‰; After abundant effect, press filtration process is carried out to waste water.
B, use sulfuric acid adjust the pH of filtered liquid about 3.5, subsequently to wherein adding the potassium permanganate (KMnO that mass ratio is 1.5 ‰
4), before in the supernatant liquor before addition after process, need the solution first potassium permanganate being made into 10%, after adding, vigorous stirring carries out oxidizing reaction 1h.
After c, oxidizing reaction complete, with Ca (OH)
2pH is about 11.0 in adjustment, after vigorous stirring reaction, carries out press filtration process to precipitation; Collect filtrate, add NaOH wherein, adjustment pH is more than 14.0 further, after abundant stirring reaction, carries out press filtration process to precipitation.
D, get filtrate, adjust pH between 6.0 ~ 7.0 with hydrochloric acid (HCl).
Claims (6)
1. a wet ornamenting composite waste treatment for reuse technique in leather production, is characterized in that, comprise step:
A, in composite waste, add coagulating agent and flocculation agent, carry out flocculation sediment, and carry out press filtration process;
The pH scope control of b, adjustment filtrate, between 3.5 ~ 5.5, carries out oxide treatment subsequently to wherein adding oxygenant;
C, reacted after, first with binary highly basic adjustment pH between 7.5 ~ 11.0, and the precipitation of generation is carried out press filtration process; Subsequently to wherein adding unitary highly basic, adjustment pH is between 12.0 ~ 14.0 further, after stirring reaction, the precipitation of generation is carried out press filtration process;
D, pressure filtrate, pH is between 6.0 ~ 7.0 in acid adding adjustment;
Described coagulating agent is polymerize aluminum chloride, polyaluminium sulfate, polymer phosphate iron, poly-ferric chloride or poly-ferrous, and the concentration of the coagulating agent aqueous solution is 5 ~ 20%, and the volume ratio of its aqueous solution and waste water controls 2 ~ 10%;
Described flocculation agent is polyacrylamide, sodium polyacrylate or calcium polyacrylate (CPA), and the concentration of its aqueous solution controls between 1 ~ 5 ‰, and the add-on of flocculant aqueous solution controls in 2 ~ 6% of wastewater volume.
2. wet ornamenting composite waste treatment for reuse technique in leather production according to claim 1, it is characterized in that, described oxygenant is the one in potassium permanganate, ozone, hydrogen peroxide, chlorine, oxymuriate, hypochlorite and Fenton reagent.
3. wet ornamenting composite waste treatment for reuse technique in leather production according to claim 1, it is characterized in that, described alkaline chemical precipitation adopts binary highly basic and unitary highly basic substep to add, the method of steps precipitation, described binary highly basic is the one in calcium hydroxide, magnesium hydroxide, calcium oxide and magnesium oxide.
4. wet ornamenting composite waste treatment for reuse technique in leather production according to claim 1, it is characterized in that, described unitary highly basic is sodium hydroxide or potassium hydroxide.
5. wet ornamenting composite waste treatment for reuse technique in leather production according to claim 1, is characterized in that, in described step b, the acid adjusting pH used is sulfuric acid.
6. wet ornamenting composite waste treatment for reuse technique in leather production according to claim 1, it is characterized in that, the acid in described steps d is sulfuric acid or hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410148108.5A CN103880221B (en) | 2014-04-15 | 2014-04-15 | A kind of leather is wet ornamenting composite waste treatment for reuse technique in producing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410148108.5A CN103880221B (en) | 2014-04-15 | 2014-04-15 | A kind of leather is wet ornamenting composite waste treatment for reuse technique in producing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103880221A CN103880221A (en) | 2014-06-25 |
| CN103880221B true CN103880221B (en) | 2016-04-06 |
Family
ID=50949394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410148108.5A Active CN103880221B (en) | 2014-04-15 | 2014-04-15 | A kind of leather is wet ornamenting composite waste treatment for reuse technique in producing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103880221B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104384172B (en) * | 2014-10-25 | 2016-09-21 | 傅颖 | A kind of synthetic leather produces the method for disposal of rectification residue |
| CN106745587A (en) * | 2016-12-01 | 2017-05-31 | 南平博士达节能科技有限公司 | The process for primary treatment of synthetic leather high ammonia-nitrogen wastewater |
| CN108975554B (en) * | 2018-08-07 | 2019-11-08 | 广东鼎丰纸业有限公司 | The efficiently method of removal pulp-making waste-water COD |
| CN113149164B (en) * | 2021-03-10 | 2023-04-07 | 四川大学 | Leather-making preparation section wastewater treatment agent and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041500A (en) * | 2007-03-28 | 2007-09-26 | 中国皮革和制鞋工业研究院 | Highly effective reusing method for leather producing chrome tanning exhausted liquid |
| CN101239769A (en) * | 2008-02-01 | 2008-08-13 | 浙江大学 | Leather-making waste water reusing treatment method |
| 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 |
| CN103043864A (en) * | 2012-12-07 | 2013-04-17 | 常州大学 | Treatment method of waste water in leather industry |
| CN103449677A (en) * | 2013-09-12 | 2013-12-18 | 安徽省绿巨人环境技术有限公司 | Treatment process for wastewater produced in production of PU (Poly Urethane) synthetic leather |
| CN103663865A (en) * | 2013-11-27 | 2014-03-26 | 湖州织里童装发展有限公司 | Leather wastewater treatment process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200191269Y1 (en) * | 1999-10-18 | 2000-08-16 | 지종기 | Ultrasonic wave device for waste water treatment using hollow fiber filter |
-
2014
- 2014-04-15 CN CN201410148108.5A patent/CN103880221B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041500A (en) * | 2007-03-28 | 2007-09-26 | 中国皮革和制鞋工业研究院 | Highly effective reusing method for leather producing chrome tanning exhausted liquid |
| CN101239769A (en) * | 2008-02-01 | 2008-08-13 | 浙江大学 | Leather-making waste water reusing treatment method |
| 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 |
| CN103043864A (en) * | 2012-12-07 | 2013-04-17 | 常州大学 | Treatment method of waste water in leather industry |
| CN103449677A (en) * | 2013-09-12 | 2013-12-18 | 安徽省绿巨人环境技术有限公司 | Treatment process for wastewater produced in production of PU (Poly Urethane) synthetic leather |
| CN103663865A (en) * | 2013-11-27 | 2014-03-26 | 湖州织里童装发展有限公司 | Leather wastewater treatment process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103880221A (en) | 2014-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103880221B (en) | A kind of leather is wet ornamenting composite waste treatment for reuse technique in producing | |
| CN104310647A (en) | Recycling method for treating stainless steel pickling acid pickle and wastewater | |
| AU2014202826B2 (en) | Tannery process with effluent recycling | |
| CN105236623A (en) | H acid waste water treatment method | |
| Tamersit et al. | Treatment of tannery unhairing wastewater using carbon dioxide and zinc cations for greenhouse gas capture, pollution removal and water recycling | |
| CN108033630A (en) | A kind of esterified waste water treatment process | |
| CN102616979B (en) | Treatment method for surface treatment liquid wastewater of metal processing | |
| CN105129867A (en) | Method used for preparing polymeric ferric sulfate from sulfuric acid waste liquid | |
| CN105923840A (en) | Technology for treating stainless steel nitrate-free pickling waste water | |
| CN104803549B (en) | A kind of preprocess method of leather-making waste water | |
| CN104876367A (en) | Method for comprehensively treating acid liquid obtained from waste hydrochloric acid and alkaline sludge | |
| CN101717123B (en) | Method for preparing modified poly-ferric chloride coagulant | |
| CN104478177A (en) | Treatment method and system of tannery wastewater | |
| CN105254067B (en) | The resource utilization method of advanced treatment of wastewater Fenton process sludge | |
| CN103787535A (en) | Treatment method of sludge water of underground water plant | |
| CN106115797A (en) | It is a kind of that catalytic wet persulfate oxidation is desuifurized prepares polymeric ferric sulfate flocculant method | |
| Trus et al. | Engineering of low-waste technology of natural and wastewaters demineralization | |
| CN107265637B (en) | A kind of leather-making waste water total nitrogen removal technique | |
| CN108793481A (en) | One kind containing Cu2+/Pb2+With the smelting wastewater and dyeing waste water mixed processing method of sulfuric acid | |
| CN108675418A (en) | A kind of polysilicate aluminium ferric flocculant and preparation method thereof | |
| CN103979709A (en) | Combined softening processing system and method for circulating water and discharging water | |
| WO2015120661A1 (en) | Circulation engineering for achieving near-zero discharge of tanning waste water | |
| CN103641256A (en) | Treatment process of alkaline dyeing waste water | |
| CN102515417A (en) | Technology for treating scouring sewage and sludge | |
| CN108083529A (en) | A kind of method that chromate waste water cooperates with processing with acid waste water |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |