CN105198112A - Method for wastewater zero discharging of leather industry - Google Patents
Method for wastewater zero discharging of leather industry Download PDFInfo
- Publication number
- CN105198112A CN105198112A CN201410248950.6A CN201410248950A CN105198112A CN 105198112 A CN105198112 A CN 105198112A CN 201410248950 A CN201410248950 A CN 201410248950A CN 105198112 A CN105198112 A CN 105198112A
- Authority
- CN
- China
- Prior art keywords
- water
- leather
- wastewater zero
- processing
- hide
- 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
Landscapes
- Treatment And Processing Of Natural Fur Or Leather (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for wastewater zero discharging of the leather industry. The method is characterized by comprising the following steps of 1, cow leather preprocessing, 2, softening processing, 3, oxidation aeration processing, 4, sedimentation, and 5, filtering and oil removal. According to the softening processing in the leather manufacturing process, fur is prevented from being degraded by a chemical reducing agent, and COD and BOD loads in a depilation waste liquid are reduced. According to the oxidation aeration processing, the load impact resistance is large; the physical technology is utilized for reducing the dosage of harmful chemical substances and lowering the suspended matter content in wastewater, a solid-liquid separator is used for solid-liquid separation, and the amount of metal ions is decreased; according to the step of filtering and oil removal, oil components are removed, the processing efficiency is high, it is ensured that water flows out stably, the water quality is reliable, resources are saved, and the environment is protected.
Description
Technical field
The invention belongs to technical field of sewage, be specifically related to a kind of method of leather-making industrial wastewater zero release.
Background technology
Leather-making waste water, by alkaline liming hair removal wastewater and weakly acidic tanning waste water composition, contains the pollutents such as the tanning material of high density, muriate, sulfide, tensio-active agent, chemical assistant, grease, protein and SS in waste water; Composite waste is in alkalescence, and turbid appearance, has bad smell, and water quality and quantity alters a great deal in time.
Leather-making waste water can biochemical better, generally all adopt biochemical process process.But normal containing sulfide and chromium ion in waste water, can produce microorganism and suppress, therefore want the pretreated effect of pay abundant attention, so in the improvement of leather-making waste water, generally all adopt " materialization-biochemistry " combination process.
Different leather-making waste waters, select different treatment process, to obtaining better treatment effect.As contained too high salts substances in leather-making waste water, easily microbic activity being produced and suppressing, so, select the underload activated sludge process that salt tolerance is stronger, or the middle loading logical embrane method selecting salt tolerance poor, determine after weighing the advantages and disadvantages; The biochemical of general leather-making waste water is fine, but the comprehensive wastewater of fur coat processed, the ratio of BOD/COD is below 0.2, and the content of COD is not high, be generally no more than 2000mg/L, when adopting contact oxidation method process, in pond, filler does not become microbial film, so preferably in waste water treatment process, add one acidication, to improve the ratio of its BOD/COD.
The beam house of leather-making technology comprises: the operations such as immersion, depilation, liming, deliming, softening and pickling.In process hides chemical process, the useless Proteins on the one hand in removing animal skin, produces a large amount of COD, BOD5; Employ poisonous and hazardous chemical substance on the other hand, in the manufacture course of processing, a large amount of chemical materialss is not fully absorbed and utilization, enters in waste water, discharges a large amount of organic pollutants and part hazardous and noxious substances, bring new pollution.The problem of these two aspects as can not be effectively solved, especially problem of environmental pollution.Therefore, at the leather-making technology that strives for improvement, while exploitation high-efficiency low-toxicity Leather Chemicals, how to avoid the environmental pollution that beam house brings, become important measures and the urgent task of China's tanning industry Sustainable development.
Summary of the invention
For the deficiencies in the prior art part; the object of the present invention is to provide a kind of method of leather-making industrial wastewater zero release; reduce the COD in depilation waste liquor and BOD loading, reduce suspension content in waste water, reduce the amount of metal ion; filter deoiling step and eliminate lubricant component; processing efficiency is high, and ensure stable water outlet, water quality is reliable; economize on resources, protection of the environment.
The technical scheme that the present invention takes is:
A method for leather-making industrial wastewater zero release, is characterized in that, comprises the steps:
(1) ox-hide pre-treatment: get salt marsh cattle hide and add 2 times of clear water, the polymerize aluminum chloride of 0.05% and the sterilant of 0.3-0.5%, control temperature is 22-25 DEG C of immersion 5-6h, and rotary drum interval 30min rotates once;
(2) sofening treatment: add alkali lye in the ox-hide after above-mentioned process, regulates pH value to 7-8, filters hair after rotating 50-55min, reaches 1-1.5 Water Under doubly wash 2 times in the water yield;
(3) oxidation and aeration process: be that 70-80% is intake from bottom according to flooding quantity, adopts low pressure mixed flow jet-flow aeration, and dissolved oxygen to control after 0.8-1.0mg/L fully mixes with water, to horizontal direction injection, to carry out oxygenic aeration to water body;
(4) precipitate: the water lotion of considering after hair enters reaction tank, add catalyzer and make sewage form alumen ustum floc sedimentation, make the precipitation by metallic ion water outlet in water;
(5) oil removing is filtered: by the solid-liquid separator be made up of sponge foam filler, supernatant liquor is promoted the suspension oil entered in water-and-oil separator Separation of Water by pump.
Alkali lye in described step (2) to be concentration be 20% the mixed alkali liquor be made up of according to weight ratio 1:3 sodium bisulfite and caustic soda.
Catalyzer in described step (4) is the mixture that bodied ferric sulfate, gac and polyacrylamide form according to weight ratio 1:3:1.
Beneficial effect of the present invention is:
Sofening treatment in leather making process avoids fleece chemical reducing agent to degrade, and reduce the COD in depilation waste liquor and BOD loading, oxidation and aeration process anti-load impact ability is large; physical technique is utilized to reduce the use of harmful chemical; reduce suspension content in waste water, make solid-liquid separation by solid-liquid separator, reduce the amount of metal ion; filter deoiling step and eliminate lubricant component; processing efficiency is high, and ensure stable water outlet, water quality is reliable; economize on resources, protection of the environment.
Embodiment
Embodiment 1
A method for leather-making industrial wastewater zero release, is characterized in that, comprises the steps:
(1) ox-hide pre-treatment: get salt marsh cattle hide and add 2 times of clear water, the polymerize aluminum chloride of 0.05% and the sterilant of 0.3%, control temperature is 22 DEG C of immersion 6h, and rotary drum interval 30min rotates once;
(2) sofening treatment: add the alkali lye be made up of according to weight ratio 1:3 sodium bisulfite and caustic soda that concentration is 20% in the ox-hide after above-mentioned process, regulates pH value to 7, and filter hair after rotating 50min, the Water Under reaching 1 times in the water yield washes 2 times;
(3) oxidation and aeration process: be 70% from bottom water inlet according to flooding quantity, adopts low pressure mixed flow jet-flow aeration, and dissolved oxygen to control after 0.8mg/L fully mixes with water, to horizontal direction injection, to carry out oxygenic aeration to water body;
(4) precipitate: the water lotion of considering after hair enters reaction tank, adds the catalyzer that bodied ferric sulfate, gac and polyacrylamide form according to weight ratio 1:3:1, make sewage form alumen ustum floc sedimentation, make the precipitation by metallic ion water outlet in water;
(5) oil removing is filtered: by the solid-liquid separator be made up of sponge foam filler, supernatant liquor is promoted the suspension oil entered in water-and-oil separator Separation of Water by pump.
Embodiment 2
A method for leather-making industrial wastewater zero release, is characterized in that, comprises the steps:
(1) ox-hide pre-treatment: get salt marsh cattle hide and add 2 times of clear water, the polymerize aluminum chloride of 0.05% and the sterilant of 0.5%, control temperature is 25 DEG C of immersion 5h, and rotary drum interval 30min rotates once;
(2) sofening treatment: add the alkali lye be made up of according to weight ratio 1:3 sodium bisulfite and caustic soda that concentration is 20% in the ox-hide after above-mentioned process, regulates pH value to 8, and filter hair after rotating 55min, the Water Under reaching 1.5 times in the water yield washes 2 times;
(3) oxidation and aeration process: be 80% from bottom water inlet according to flooding quantity, adopts low pressure mixed flow jet-flow aeration, and dissolved oxygen to control after 1.0mg/L fully mixes with water, to horizontal direction injection, to carry out oxygenic aeration to water body;
(4) precipitate: the water lotion of considering after hair enters reaction tank, adds the catalyzer that bodied ferric sulfate, gac and polyacrylamide form according to weight ratio 1:3:1, make sewage form alumen ustum floc sedimentation, make the precipitation by metallic ion water outlet in water;
(5) oil removing is filtered: by the solid-liquid separator be made up of sponge foam filler, supernatant liquor is promoted the suspension oil entered in water-and-oil separator Separation of Water by pump.
Claims (3)
1. a method for leather-making industrial wastewater zero release, is characterized in that, comprises the steps:
(1) ox-hide pre-treatment: get salt marsh cattle hide and add 2 times of clear water, the polymerize aluminum chloride of 0.05% and the sterilant of 0.3-0.5%, control temperature is 22-25 DEG C of immersion 5-6h, and rotary drum interval 30min rotates once;
(2) sofening treatment: add alkali lye in the ox-hide after above-mentioned process, regulates pH value to 7-8, filters hair after rotating 50-55min, reaches 1-1.5 Water Under doubly wash 2 times in the water yield;
(3) oxidation and aeration process: be that 70-80% is intake from bottom according to flooding quantity, adopts low pressure mixed flow jet-flow aeration, and dissolved oxygen to control after 0.8-1.0mg/L fully mixes with water, to horizontal direction injection, to carry out oxygenic aeration to water body;
(4) precipitate: the water lotion of considering after hair enters reaction tank, add catalyzer and make sewage form alumen ustum floc sedimentation, make the precipitation by metallic ion water outlet in water;
(5) oil removing is filtered: by the solid-liquid separator be made up of sponge foam filler, supernatant liquor is promoted the suspension oil entered in water-and-oil separator Separation of Water by pump.
2. the method for a kind of leather-making industrial wastewater zero release according to claim 1, is characterized in that, the alkali lye in described step (2) to be concentration be 20% the mixed alkali liquor be made up of according to weight ratio 1:3 sodium bisulfite and caustic soda.
3. the method for a kind of leather-making industrial wastewater zero release according to claim 1, is characterized in that, the catalyzer in described step (4) is the mixture that bodied ferric sulfate, gac and polyacrylamide form according to weight ratio 1:3:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248950.6A CN105198112A (en) | 2014-06-07 | 2014-06-07 | Method for wastewater zero discharging of leather industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410248950.6A CN105198112A (en) | 2014-06-07 | 2014-06-07 | Method for wastewater zero discharging of leather industry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105198112A true CN105198112A (en) | 2015-12-30 |
Family
ID=54946146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410248950.6A Pending CN105198112A (en) | 2014-06-07 | 2014-06-07 | Method for wastewater zero discharging of leather industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105198112A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106242102A (en) * | 2016-04-21 | 2016-12-21 | 浙江海洋学院 | A kind of method for purifying treatment of industrial effluent |
| CN108101280A (en) * | 2017-12-20 | 2018-06-01 | 海宁卡森皮革有限公司 | A kind of processing method of wastewater zero discharge |
| CN108383303A (en) * | 2018-04-02 | 2018-08-10 | 俞祖林 | A kind for the treatment of process of leather-making waste water zero-emission |
-
2014
- 2014-06-07 CN CN201410248950.6A patent/CN105198112A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106242102A (en) * | 2016-04-21 | 2016-12-21 | 浙江海洋学院 | A kind of method for purifying treatment of industrial effluent |
| CN108101280A (en) * | 2017-12-20 | 2018-06-01 | 海宁卡森皮革有限公司 | A kind of processing method of wastewater zero discharge |
| CN108383303A (en) * | 2018-04-02 | 2018-08-10 | 俞祖林 | A kind for the treatment of process of leather-making waste water zero-emission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zhao et al. | A review for tannery wastewater treatment: some thoughts under stricter discharge requirements | |
| CN104276646B (en) | A kind of method rapidly and efficiently removing Heavy Metals in Waters | |
| CN104386874B (en) | A kind of wiring board industry high-concentration waste liquor treating process | |
| Mohammadi et al. | Optimization of nitrogen removal from an anaerobic digester effluent by electrocoagulation process | |
| CN102718344A (en) | Recycling treatment process of printing and dyeing wastewater | |
| CN103193364B (en) | Resource utilization method of ion exchange resin desorption solution | |
| Gutterres et al. | Chromium in tannery wastewater | |
| CN106007001A (en) | Method for removing sulfate and Zn(II) wastewater by virtue of synergism of spongy iron and microorganisms | |
| Bhardwaj et al. | Tannery effluent treatment and its environmental impact: a review of current practices and emerging technologies | |
| CN105198112A (en) | Method for wastewater zero discharging of leather industry | |
| CN103951107A (en) | Device and method for treating coking wastewater | |
| CN106145530B (en) | Method suede nitre dye wastewater treatment and recycled | |
| CN107935098A (en) | A kind of method for handling organic wastewater | |
| CN106746193A (en) | A kind of processing method of leather-making waste water | |
| CN104478177A (en) | Treatment method and system of tannery wastewater | |
| CN104211232A (en) | Method for coal ash and scrap iron combined treatment of dyeing and printing wastewater | |
| CN208869412U (en) | The processing system of chromate waste water | |
| CN103979709A (en) | Combined softening processing system and method for circulating water and discharging water | |
| Yong | New technology for wastewater treatment | |
| CN203877998U (en) | Circulating water/sewage water combined softening treatment system | |
| CN209242826U (en) | The processing unit of nickel in a kind of removal chemical nickle-plating wastewater | |
| CN104692522B (en) | The composite drug of pollutant benzoquinone and the method for degradation treatment Pollutants in Wastewater benzoquinone in degrading waste water | |
| CN102992542A (en) | Method for treating heavy-nitrogen mother solution generated from production of dinitrodiazophenol | |
| CN202072520U (en) | High-concentration difficultly degraded organic waste water treating equipment | |
| CN102091640B (en) | Preparation method of catalyst |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20151230 |