CN103449678A - Agricultural equipment coating wastewater treatment technology - Google Patents

Agricultural equipment coating wastewater treatment technology Download PDF

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Publication number
CN103449678A
CN103449678A CN2013104144958A CN201310414495A CN103449678A CN 103449678 A CN103449678 A CN 103449678A CN 2013104144958 A CN2013104144958 A CN 2013104144958A CN 201310414495 A CN201310414495 A CN 201310414495A CN 103449678 A CN103449678 A CN 103449678A
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CN
China
Prior art keywords
tank
agricultural equipment
enters
wastewater treatment
pool
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Pending
Application number
CN2013104144958A
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Chinese (zh)
Inventor
姚明
胡召堂
赵晓刚
李双建
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ANHUI LVJUREN ENVIRONMENT TECHNOLOGY Co Ltd
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ANHUI LVJUREN ENVIRONMENT TECHNOLOGY Co Ltd
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Priority to CN2013104144958A priority Critical patent/CN103449678A/en
Publication of CN103449678A publication Critical patent/CN103449678A/en
Pending legal-status Critical Current

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Abstract

The invention discloses an agricultural equipment coating wastewater treatment technology. The agricultural equipment coating wastewater treatment technology is characterized by comprising the following steps of pretreatment, namely entering wastewater into an oil removal collection tank, and removing oil slick on the surface; coagulating sedimentation, namely, lifting the wastewater to a coagulating sedimentation integration tank I by a pump, so that the wastewater is subjected to coagulating flocculation action and forms large floc particles, entering water yielded from the coagulating sedimentation integration tank I into a dissolved air flotation machine, and entering water yielded from the dissolved air flotation machine into a buffer tank; hydrolytic acidification, namely, entering water yielded from the buffer tank into a hydrolytic acidification tank; aerobic treatment, namely, entering water yielded from the hydrolytic acidification tank into a contact oxidation tank, and decomposing organic matters; filtering separation, entering water yielded from the contact oxidation tank into a secondary sedimentation tank, after removing SS (suspended solids), entering a sand filter and flowing into a carbon filter, entering water yielded from the carbon filter into a disinfection water tank, and after disinfection, entering a recycling water tank; and carrying out sludge treatment. The agricultural equipment coating wastewater treatment technology is simple, convenient to operate and easy to maintain and manage; by adopting the agricultural equipment coating wastewater treatment technology, the sludge reflux is not needed, the sludge bulking phenomenon does not occur, the recovery rate reaches above 95%, and the zero emission is truly realized.

Description

A kind of agricultural equipment coating wastewater treatment process
Technical field
The present invention relates to the processing of chemical field waste water, specifically a kind of agricultural equipment coating wastewater treatment process.
Background technology
Mechanization of agriculture is the important component part of agricultural modernization, to promoting rural economic development, the level that increases productivity, the important effect of pushing forward the building of a new socialist countryside.Large-scale agricultural equipment development is " the national science and technology supporting plan " main project, the project emphasis is around improving labor productivity, labour productivity, resource utilization, and guarantee the national food safety urgent demand to large-scale farm power and working equipment, aim at multi-functional, intelligent, the agricultural equipment technical development emphasis such as economical equipment, put forth effort to break through the core key technology equipment of large-scale agricultural equipment, put forth effort to break the situation that current Chinese large-sized agricultural equipment relies on import fully, urge to push away product and industry restructuring upgrading, promote agricultural machanization and the good and fast development of agro-based industry.
In the agricultural equipment industry, Painting Shop is the emphasis of environment protection.Large-scale agricultural equipment coating wastewater is mainly the phosphorized waste water, pickling waste waters, degreasing waste water, electrophoresis waste water, painting wastewater, chromium passivation wastewater, the table that produce in production process and adjusts waste liquid etc., and principal pollutant are the heavy metal ion such as chromium, nickel, manganese, zinc, COD, petroleum-type and SS etc.Complicated component, Pollutant levels be high,, biodegradability is poor, and intractability is larger.If directly be discharged in environment without processing, will cause serious pollution to environment.The problems such as at present floating partition method, electrowinning method, reverse osmosis method etc., all exist cost high, can not fine processing up to standard.
Summary of the invention
The object of the present invention is to provide agricultural equipment coating wastewater treatment process.
Purpose of the present invention can be achieved through the following technical solutions:
A kind of agricultural equipment coating wastewater treatment process, is characterized in that, comprises the following steps:
(1) pre-treatment: waste water enters the oil removal collecting tank, the insulation surfaces oil slick;
(2) coagulating sedimentation: the waste water that step (1) obtains is promoted to coagulating sedimentation integrated pond I through pump, adds alkali to regulate pH to 12-13, adds CaCL simultaneously 2, remove Fe in waste liquid 3+and PO4 3-, then add coagulating agent PAC, PAM, and the coagulation-flocculation effect occurs form the macrobead flco, precipitation is removed SS, and the integrated pond I water outlet of retrogradation shallow lake enters dissolved gas floatator, adds HCl, and regulating pH is 8, and the dissolved gas floatator water outlet enters Buffer Pool;
(3) acidication: the Buffer Pool water outlet enters hydrolysis acidification pool, and hardly degraded organic substance in waste water is converted into to easily biodegradable organics;
(4) aerobic treatment: step (3) hydrolysis acidification pool water outlet enters contact-oxidation pool, decomposing organic matter;
(5) filtering separation: step (4) contact-oxidation pool water outlet enters after second pond is removed SS and enters sand filter, rear inflow carbon filtering pool, and the carbon filtering pool water outlet enters reuse pool after entering the disinfection pool sterilization;
(6) sludge treatment: in coagulating sedimentation integrated pond I, dissolved gas floatator, second pond, mud enters sludge thickener, and mud promotes and enters plate-and-frame filter press through spiral pump, and the dehydrated sludge outward transport is disposed.
Described waste water comprises pickling waste waters, spent pickle liquor, degreasing waste water, degreasing wasting liquid, electrophoresis waste water, electrophoresis waste liquid, phosphorized waste water, etching waste liquor, the waste liquid that sprays paint, passivation waste liquid, table tune waste liquid.
In described step (2), alkali is NaOH, described NaOH and the CaCL of adding 2mass ratio be 4:3.
In described step (2), HCL concentration is 10%.
In described step (2), the concentration of coagulating agent PAC, PAM is 2 ‰, and dosage is 1-3mg/L.
Beneficial effect of the present invention:
1, take high density and low concentration wastewater categorised collection, dilution process after high-concentration waste liquid is evenly sent into to corresponding low concentration wastewater equalizing tank and evenly mixed with low discharge through lift pump, thus reduce the impact load to follow-up unit.
2, the aerobic biochemical section is the core of whole large-scale agricultural equipment coating wastewater treatment process.。
3, processing efficiency is higher, saves and takes up an area.
4, do not need to cultivate specially bacterial classification, biofilm is convenient, can intermittent operation.
5, the sludge creation amount is few, and mud granule is larger, is easy to precipitation.
6, impact load has stronger adaptive faculty, under the intermittent operation condition, still can keep good treatment effect, and the inhomogeneous enterprise to draining, more be of practical significance.
7, simple to operate, operation facilitates, is easy to maintenance management, without sludge reflux, does not produce the sludge bulking phenomenon.
8, large-scale agricultural equipment coating wastewater after treatment, is directly used in production, and reclamation rate reaches more than 95%, real realization " zero release ".
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Spent pickle liquor, the degreasing wasting liquid that regularly discharge in workshop enter the oily waste liquor collecting tank and are collected, and then quantitatively pump into the oil removal collecting tank, through the oil removal pre-treatment, enter subsequent disposal.
Pickling waste waters, the degreasing waste water of workshop discharge enter the oil removal collecting tank, the insulation surfaces oil slick, simultaneously by waste-oil scavenger by the most of floating oil collecting in surface to oil storage barrel, waste water after the oil removal of oil removal collecting tank is promoted to coagulating sedimentation integrated pond I through pump, add NaOH to regulate PH to 12-13, add CaCL2 simultaneously, remove Fe3+ and PO43-in waste water, the mass ratio of NaOH and CaCL2 is 4:3.Add coagulating agent PAC and PAM, the concentration of coagulating agent PAC, PAM is 2 ‰ again, and dosage is 1-3mg/L.The coagulation-flocculation effect occurs form the macrobead flco, under action of gravity, precipitation is removed most of SS, the water outlet of coagulating sedimentation integrated pond I enters the combined-type dissolved gas floatation machine, add HCL, regulate PH to 8, after adding PAC and PAM generation coagulation to produce small flco, the PAC dosage is 2mg/L, the PAM dosage is 1mg/L, is floated to the water surface and forms scum silica frost under the effect of micro-bubble, scums under the mud scraper effect and remains oil slick.The water outlet of combined-type dissolved gas floatation machine enters Buffer Pool.
Electrophoresis waste liquid, the waste liquid that sprays paint, passivation waste liquid, the table of regularly discharge of workshop are adjusted waste liquid, enter comprehensive waste collection pond and are collected, and then quantitatively pump into the comprehensive wastewater collecting tank, carry out subsequent disposal.
Comprehensive waste collection pond waste liquid quantitatively pumps into the comprehensive wastewater collecting tank, with electrophoresis waste water, mix, be promoted to coagulating sedimentation integrated pond I through pump, promote the waste water of coming with the oil removal collecting tank and mix, after the most of SS of removal and part COD are processed in dosing, enter Buffer Pool.
The phosphorized waste water of workshop discharge enters the phosphorized waste water collecting tank, through the pump lifting waste water, enters coagulating sedimentation integrated pond I, adds sulphite hexavalent chrome reduction is become to trivalent chromium, makes it to generate precipitation of hydroxide.By adding NaOH to regulate PH at 12-13, add CaCl2 simultaneously, in waste water, Ni2+ is combined with OH-and is generated Ni (OH) 2 precipitations, Mn2+ is combined with OH-and is generated Mn (OH) 2 precipitations, PO43-is combined with Ca2+ and is generated Ca3(PO4) 2 precipitations, Ni (OH) 2 precipitations, Mn (OH) 2 precipitations, Ca3(PO4) 2, add flocculation agent PAC, coagulant aids PAM, the PAC dosage is 2mg/L, the PAM dosage is 1mg/L, form large alumen ustum by coagulation, through the gravitational settling effect, remove most flcos and SS, through this section, process, chromium in waste water, nickel, manganese, zinc content can be down to below 1PPM, and reduction organic concentration.By adding HCL readjustment pH between 9-10.5, in waste water, Zn2+ is combined with OH-and is generated Zn (OH) 2 precipitations, after by being combined with flocculation agent PAC, coagulant aids PAM, form large alumen ustum, by the gravitational settling effect, remove, and the reduction organic concentration, the water outlet of coagulating sedimentation integrated pond I enters Buffer Pool.
Workshop is the etching waste liquor of discharge regularly, enters the etching waste liquor collecting tank and is collected, and then quantitatively pumps into the phosphorized waste water collecting tank, carries out follow-up materialization processing.
Sanitary sewage enters pump well and enters Buffer Pool through grid after the macrobead foreign material are removed in the slag pre-treatment and fully mix with the comprehensive wastewater of processing respectively through materialization and phosphorized waste water, regulate pH to neutral, part is promoted to hydrolysis acidification pool (controlling flow at 15m3/h), hardly degraded organic substance in waste water is converted into to easily biodegradable organics, improves the biodegradability of waste water.And then enter biological contact oxidation pond and carry out aerobic treatment, decompose the most of organism of residue.The biological contact oxidation pond water outlet enters sand filter after second pond is removed most of SS, remove residue SS by the filtrate crown_interception, rear gravity flow enters carbon filtering pool, further remove rest COD and colourity by the charcoal absorption effect, the carbon filtering pool water outlet enters reuse pool after entering disinfection pool sterilization, by blowback use to afforesting, flush the toilet, belt filter press flushing and molten medicine etc. in ground flushing and sewage plant.
Buffer Pool waste water is except middle water reuse required water, all the other waste water are through standardization discharge outlet qualified discharge, it is concentrated that coagulating sedimentation integrated pond I and dissolved gas floatator materialized mud, second pond biochemical sludge enter sludge thickener 1, promote and enter plate-and-frame filter press by spiral pump, the dehydrated sludge outward transport is disposed.
Table 1 is each cell processing effect of the present invention.Unit: mg/L (except pH, intestinal bacteria)
Above content is only to technique example of the present invention and explanation; affiliated those skilled in the art make various modifications to described specific embodiment or supplement or adopt similar mode to substitute; only otherwise depart from the technique of invention or surmount this scope as defined in the claims, all should belong to protection scope of the present invention.

Claims (5)

1. an agricultural equipment coating wastewater treatment process, is characterized in that, comprises the following steps:
(1) pre-treatment: waste water enters the oil removal collecting tank, the insulation surfaces oil slick;
(2) coagulating sedimentation: the waste water that step (1) obtains is promoted to coagulating sedimentation integrated pond I through pump, adds alkali to regulate pH to 12-13, adds CaCL simultaneously 2, remove Fe in waste liquid 3+and PO4 3-, then add coagulating agent PAC, PAM, and the coagulation-flocculation effect occurs form the macrobead flco, precipitation is removed SS, and the integrated pond I water outlet of retrogradation shallow lake enters dissolved gas floatator, adds HCl, and regulating pH is 8, and the dissolved gas floatator water outlet enters Buffer Pool;
(3) acidication: the Buffer Pool water outlet enters hydrolysis acidification pool, and hardly degraded organic substance in waste water is converted into to easily biodegradable organics;
(4) aerobic treatment: step (3) hydrolysis acidification pool water outlet enters contact-oxidation pool, decomposing organic matter;
(5) filtering separation: step (4) contact-oxidation pool water outlet enters after second pond is removed SS and enters sand filter, rear inflow carbon filtering pool, and the carbon filtering pool water outlet enters reuse pool after entering the disinfection pool sterilization;
(6) sludge treatment: in coagulating sedimentation integrated pond I, dissolved gas floatator, second pond, mud enters sludge thickener, and mud promotes and enters plate-and-frame filter press through spiral pump, and the dehydrated sludge outward transport is disposed.
2. agricultural equipment coating wastewater treatment process according to claim 1, it is characterized in that, described waste water comprises pickling waste waters, spent pickle liquor, degreasing waste water, degreasing wasting liquid, electrophoresis waste water, electrophoresis waste liquid, phosphorized waste water, etching waste liquor, the waste liquid that sprays paint, passivation waste liquid, table tune waste liquid.
3. agricultural equipment coating wastewater treatment process according to claim 1, is characterized in that, in described step (2), alkali is NaOH, described NaOH and the CaCL of adding 2mass ratio be 4:3.
4. agricultural equipment coating wastewater treatment process according to claim 1, is characterized in that, in described step (2), HCL concentration is 10%.
5. agricultural equipment coating wastewater treatment process according to claim 1, is characterized in that, in described step (2), the concentration of coagulating agent PAC, PAM is 2 ‰, and dosage is 1-3mg/L.
CN2013104144958A 2013-09-12 2013-09-12 Agricultural equipment coating wastewater treatment technology Pending CN103449678A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105060647A (en) * 2015-08-17 2015-11-18 福建盈浩工艺制品有限公司 Method for comprehensively treating paint spraying wastewater and domestic wastewater
CN105084680A (en) * 2015-09-28 2015-11-25 江苏泰源环保科技有限公司 Industrial sewage purification system
CN105417840A (en) * 2015-11-02 2016-03-23 安徽洋森环保节能科技有限公司 Treatment method for coating pretreatment wastewater
CN105502800A (en) * 2015-09-28 2016-04-20 江苏泰源环保科技股份有限公司 Paper manufacturing industry wastewater treatment method
CN105984992A (en) * 2015-01-31 2016-10-05 福建省首融环境科技有限公司 Paint wastewater treatment method
CN105983300A (en) * 2015-01-31 2016-10-05 福建省首融环境科技有限公司 Treatment process for paint exhaust gas
CN106698755A (en) * 2017-02-06 2017-05-24 苏州佳伟通环保科技有限公司 Environmentally-friendly waste water and agent treatment system
CN107685072A (en) * 2017-09-26 2018-02-13 上海格林曼环境技术有限公司 A kind of method of concentrated combustion formula original position thermal desorption reparation for contaminated site
CN108467154A (en) * 2018-05-02 2018-08-31 江苏大彭环保科技有限公司 A kind of SBR waste water treatment process of soybean lecithin production
CN108558117A (en) * 2017-12-22 2018-09-21 合肥学院 Coating wastewater processing method
CN109534608A (en) * 2018-12-21 2019-03-29 泽州县和美环保科技有限公司 A kind of domestic sewage processing system and processing method
WO2021082136A1 (en) * 2019-11-01 2021-05-06 苏州柳溪机电工程有限公司 Wastewater treatment system for environment-friendly paint coating line

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105984992A (en) * 2015-01-31 2016-10-05 福建省首融环境科技有限公司 Paint wastewater treatment method
CN105983300A (en) * 2015-01-31 2016-10-05 福建省首融环境科技有限公司 Treatment process for paint exhaust gas
CN105060647A (en) * 2015-08-17 2015-11-18 福建盈浩工艺制品有限公司 Method for comprehensively treating paint spraying wastewater and domestic wastewater
CN105084680A (en) * 2015-09-28 2015-11-25 江苏泰源环保科技有限公司 Industrial sewage purification system
CN105502800A (en) * 2015-09-28 2016-04-20 江苏泰源环保科技股份有限公司 Paper manufacturing industry wastewater treatment method
CN105417840A (en) * 2015-11-02 2016-03-23 安徽洋森环保节能科技有限公司 Treatment method for coating pretreatment wastewater
CN106698755A (en) * 2017-02-06 2017-05-24 苏州佳伟通环保科技有限公司 Environmentally-friendly waste water and agent treatment system
CN107685072A (en) * 2017-09-26 2018-02-13 上海格林曼环境技术有限公司 A kind of method of concentrated combustion formula original position thermal desorption reparation for contaminated site
CN108558117A (en) * 2017-12-22 2018-09-21 合肥学院 Coating wastewater processing method
CN108467154A (en) * 2018-05-02 2018-08-31 江苏大彭环保科技有限公司 A kind of SBR waste water treatment process of soybean lecithin production
CN109534608A (en) * 2018-12-21 2019-03-29 泽州县和美环保科技有限公司 A kind of domestic sewage processing system and processing method
WO2021082136A1 (en) * 2019-11-01 2021-05-06 苏州柳溪机电工程有限公司 Wastewater treatment system for environment-friendly paint coating line

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Application publication date: 20131218