CN101565254B - Aluminum oxidation wastewater treatment and reclaimed water reuse technology - Google Patents
Aluminum oxidation wastewater treatment and reclaimed water reuse technology Download PDFInfo
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- CN101565254B CN101565254B CN2009100274547A CN200910027454A CN101565254B CN 101565254 B CN101565254 B CN 101565254B CN 2009100274547 A CN2009100274547 A CN 2009100274547A CN 200910027454 A CN200910027454 A CN 200910027454A CN 101565254 B CN101565254 B CN 101565254B
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Abstract
The invention relates to aluminum oxidation wastewater treatment and reclaimed water reuse technology, which is characterized in that the technology mainly comprises the steps of pretreatment, electric coagulation, micro-filtration and reverse osmosis; pretreating high fluoride-containing wastewater, ammonia-containing wastewater and nickel-containing wastewater respectively, and centralizedly draining the wastewater to a wastewater disposal basin with other production wastewater in a workshop; sending the wastewater into a pH adjustment tank, conveying the wastewater to an electric coagulation machine for electric coagulation treatment after the pH value is adjusted to be between 4 and 6, making the wastewater after the electric coagulation treatment enter an electric coagulation discharge bay, sending the wastewater to a micro-filtration concentration tank, conveying the wastewater to a micro-filtration system, and collecting a micro-filtration effluent to a reuse water basin; and conveying one part of water in the reuse water basin to the workshop for reuse, quantificationally draining one part, conveying the other part to a reverse osmosis system to produce pure water, and storing the pure water in a pure water storage tank. In sum, the technology can effectively remove heavy metals and salts in the wastewater, ensure that the COD in the treated wastewater is less than or equal to 25 mg/L, cannot cause secondary pollution of reuse water due to adding a coagulating agent and a flocculating agent, and has high reuse rate of reclaimed water.
Description
(1) technical field
The present invention relates to a kind of alumina wastewater treatment and middle water reusing method, be specially adapted to the wastewater treatment and the reuse of aluminium section bar processing enterprise.
(2) background technology
It is big that section bar processing enterprise handles water consumption to aluminium shape surface, and it is many to produce waste water, and objectionable impurities continues discharging in the waste water, will contaminate environment as not being handled, aggravate the Freshwater resources shortage situation of domestic more and more anxiety.Simultaneously, be accompanied by the taxation of China, also can increase the cost and the burden of enterprise blowdown flow rate.Therefore, consider that it is necessary and necessary carrying out wastewater treatment from social responsibility of enterprises and economic benefit two aspects.
The treatment process of aluminium section bar oxidized waste water has traditional wastewater treatment that removes nickel, defluorination, removes ammonia and high COD, these aspect methods be chemical precipitation, filter method, only remove comparatively obvious to the suspended substance in the waste water (SS), and it is low for the clearance of some heavy metals and salt, chemical oxygen demand (COD) (COD), middle water reclamation rate after the processing is low, only can arrive former discharging standards, as total nickel≤1.0mg/L, chemical oxygen demand COD≤80mg/L.
And along with the enhancing of people's environmental consciousness, also more and more higher to the requirement of sewage disposal, country has also proposed new requirement to sewage emissions, and as total nickel≤0.1mg/L, chemical oxygen demand COD≤50mg/L, and the water reclamation rate reaches 80% at the year two thousand twenty in requiring.
Conventional chemical precipitation, filter method is difficult to satisfy the new requirement of sewage disposal, especially heavy metal, COD and in aspect the water reclamation rate.And conventional chemical precipitation method needs to drop into coagulating agent, flocculation agent, can cause the secondary pollution of reuse water.
(3) summary of the invention
The objective of the invention is to overcome above-mentioned deficiency, a kind of alumina wastewater treatment and middle water reusing method are provided, this technology can effectively be removed heavy metal and the salt in the waste water, make the waste water COD≤25mg/L after the processing, can not cause the secondary pollution of reuse water because of input coagulating agent, flocculation agent, middle water reclamation rate height.
The object of the present invention is achieved like this: a kind of alumina wastewater treatment and middle water reusing method, and it mainly comprises, and pre-treatment, electricity coagulate, micro-filtration and reverse osmosis step,
Step 1, pre-treatment:
High fluoride waste, ammonia-containing water and nickel-containing waste water are passed through pre-treatment respectively, concentrate with other factory effluents of workshop then to be disposed to wastewater disposal basin;
Step 2, electricity coagulate:
Water in the wastewater disposal basin is transported to pH adjusts the pond, after pH adjusts in the pond pH regulator to 4～6, be delivered to electric coagulation machine, carry out electricity and coagulate to handle, electricity coagulates waste water after handling and enters electricity and coagulate outlet sump, and coagulates outlet sump at electricity and add alkali, the pH value is adjusted to 7～8, adds activity charcoal powder then;
Step 3, micro-filtration:
The waste water that electricity is coagulated outlet sump is delivered to the micro-filtration concentration basin, is delivered to microfiltration systems then, carries out solid-liquid separation, and the dense water of micro-filtration is back to the micro-filtration concentration basin, and the micro-filtration water outlet is collected into reuse pool; The micro-filtration condensed water quantitatively is disposed to the concentrated solution collecting tank, is delivered to the pressure filter dehydration again, the mud cake outward transport, and the pressure filter filtered liquid is back to wastewater disposal basin row processing again;
Step 4, reverse osmosis:
Water part in the reuse pool is delivered to the workshop reuse, and a part is quantitatively discharged, and another part is delivered to reverse osmosis system and makes pure water, and pure water is stored in the pure water storage tank; The dense water of reverse osmosis system is back to wastewater disposal basin row processing again.
A kind of alumina wastewater treatment of the present invention and middle water reusing method, in the step 2 add-on of activity charcoal powder be electricity coagulate water weight in the outlet sump 2 ‰～5 ‰.
One of characteristics of the present invention are with after high fluoride waste, ammonia-containing water and the independent pre-treatment of nickel-containing waste water difference, concentrate with other factory effluents of workshop to be disposed to wastewater disposal basin.Through after the pre-treatment, make in the waste water fluorine-containing, contain ammonia and nickel content reduces, alleviate the pressure of subsequent disposal, and cost is low.
Two of characteristics of the present invention are to adopt electricity to coagulate treatment technology, electric energy is converted into chemical energy, can carry out redox reaction to the organic or inorganic thing in the water through Electrocoagulation equipment, and then condense, float and remove, pollutent is separated from water body, further remove heavy metal, salt and COD, SS and colourity in the waste water.
Three of characteristics of the present invention are to utilize the physical principle mechanical filter, remove and add quantitative activity charcoal powder, adsorb remaining COD, organism and enter mud, before the micro-filtration water outlet, no longer add any chemical coagulation, flocculation agent, making it reuse water does not increase secondary pollution, thus really in alumina surface treatment, waste water the water reuse enter benign cycle, with chronicity, stability, the sustainability of water reuse in reaching.
The present invention is simple to operate, and floor space is little, once drops into life-time service, and middle water Treatment for Reuse cost is 2.5-3 unit/ton, and COD≤25mg/L, nickel content≤0.04mg/L in the middle water after the processing are all less than the emission standard of country.Use this invention technology, can make that the water reclamation rate reaches 90% in the production line, remaining 10% water coolant and cleaning toilet water that is used for whole factory.
In sum, the present invention can effectively remove heavy metal and the salt in the waste water, makes the waste water COD≤25mg/L after the processing, can not cause the secondary pollution of reuse water, middle water reclamation rate height because of dropping into coagulating agent, flocculation agent.
(4) description of drawings
Fig. 1 is the process flow sheet of a kind of alumina wastewater treatment of the present invention and middle water reusing method.
(5) embodiment
Referring to Fig. 1, a kind of alumina wastewater treatment and the middle water reusing method that the present invention relates to pass through pre-treatment respectively with high fluoride waste, ammonia-containing water and nickel-containing waste water, concentrate with other factory effluents of workshop then to be disposed to wastewater disposal basin;
Water in the wastewater disposal basin is transported to pH adjusts the pond, after pH adjusts in the pond pH regulator to 4～6, be delivered to electric coagulation machine, carry out electricity and coagulate processing, the waste water that electricity coagulates after handling enters electricity outlet sump with fixed attention, and coagulate outlet sump at electricity and add alkali, the pH value is adjusted to 7～8, add then and account for the activity charcoal powder that electricity coagulates outlet sump water weight 2 ‰～5 ‰;
The waste water that electricity is coagulated outlet sump is delivered to the micro-filtration concentration basin, is delivered to microfiltration systems then, carries out solid-liquid separation, and the dense water of micro-filtration is back to the micro-filtration concentration basin, and the micro-filtration water outlet is collected into reuse pool; The micro-filtration condensed water quantitatively is disposed to the concentrated solution collecting tank, is delivered to the pressure filter dehydration again, the mud cake outward transport, and the pressure filter filtered liquid is back to wastewater disposal basin row processing again;
Water part in the reuse pool is delivered to the workshop reuse, and a part is quantitatively discharged, and another part is delivered to reverse osmosis system and makes pure water, and pure water is stored in the pure water storage tank; The dense water of reverse osmosis system is back to wastewater disposal basin row processing again.
The pre-treatment of fluoride waste is fluoride waste to be concentrated to fluoride waste collect, and is delivered to the fluoride waste reaction tank then, adds NaOH, Ca (OH) in the fluoride waste reaction tank
2And PAM, control pH value 8～9, reacted supernatant liquor is pooled to wastewater disposal basin.
The pre-treatment of ammonia-containing water is that ammonia-containing water is concentrated to the ammonia-containing water pond, passes through H
2SO
4Regulate pH value to 7～7.5, pass through anaerobic pond, contact-oxidation pool then after precipitation process, supernatant liquor is pooled to wastewater disposal basin.
The pre-treatment of nickel-containing waste water is nickel-containing waste water to be concentrated to nickel-containing waste water collect, and is delivered to the nickel-containing waste water reaction tank then, adds NaOH, Ca (OH) in the nickel-containing waste water reaction tank
2And PAM, control pH value 10～11, reacted supernatant liquor is pooled to wastewater disposal basin.
The present invention is simple to operate, and floor space is little, once drops into life-time service, and middle water Treatment for Reuse cost is 2.5-3 unit/ton, and COD≤25mg/L, nickel content≤0.04mg/L in the middle water after the processing are all less than the emission standard of new country.Use this invention technology, can make that the water reclamation rate reaches 90% in the production line, remaining 10% water coolant and cleaning toilet water that is used for whole factory.To the conserve water resource, improve environment and play positive meaning.And it is remarkable to economic benefit of enterprises.
Claims (2)
1. an alumina wastewater treatment and middle water reusing method is characterized in that:
Its processing step comprises that pre-treatment, electricity coagulate, micro-filtration and reverse osmosis,
Step 1, pre-treatment:
High fluoride waste, ammonia-containing water and nickel-containing waste water are passed through pre-treatment respectively, concentrate with other factory effluents of workshop then to be disposed to wastewater disposal basin;
The pre-treatment of described fluoride waste is fluoride waste to be concentrated to fluoride waste collect, and is delivered to the fluoride waste reaction tank then, adds NaOH, Ca (OH) in the fluoride waste reaction tank
2And PAM, control pH value 8～9, reacted supernatant liquor is pooled to wastewater disposal basin;
The pre-treatment of described ammonia-containing water is that ammonia-containing water is concentrated to the ammonia-containing water pond, passes through H
2SO
4Regulate pH value to 7～7.5, pass through anaerobic pond, contact-oxidation pool then after precipitation process, supernatant liquor is pooled to wastewater disposal basin;
The pre-treatment of described nickel-containing waste water is nickel-containing waste water to be concentrated to nickel-containing waste water collect, and is delivered to the nickel-containing waste water reaction tank then, adds NaOH, Ca (OH) in the nickel-containing waste water reaction tank
2And PAM, control pH value 10～11, reacted supernatant liquor is pooled to wastewater disposal basin;
Step 2, electricity coagulate:
Water in the wastewater disposal basin is transported to pH adjusts the pond, after pH adjusts in the pond pH regulator to 4～6, be delivered to electric coagulation machine, carry out electricity and coagulate to handle, electricity coagulates waste water after handling and enters electricity and coagulate outlet sump, and coagulates outlet sump at electricity and add alkali, the pH value is adjusted to 7～8, adds activity charcoal powder then;
Step 3, micro-filtration:
The waste water that electricity is coagulated outlet sump is delivered to the micro-filtration concentration basin, is delivered to microfiltration systems then, carries out solid-liquid separation, and the dense water of micro-filtration is back to the micro-filtration concentration basin, and the micro-filtration water outlet is collected into reuse pool; The micro-filtration condensed water quantitatively is disposed to the concentrated solution collecting tank, is delivered to the pressure filter dehydration again, the mud cake outward transport, and the pressure filter filtered liquid is back to wastewater disposal basin row processing again;
Step 4, reverse osmosis:
Water part in the reuse pool is delivered to the workshop reuse, and a part is quantitatively discharged, and another part is delivered to reverse osmosis system and makes pure water, and pure water is stored in the pure water storage tank; The dense water of reverse osmosis system is back to wastewater disposal basin row processing again.
2. a kind of alumina wastewater treatment according to claim 1 and middle water reusing method is characterized in that: the add-on of activity charcoal powder is 2 ‰～5 ‰ of water weight in the electric outlet sump with fixed attention in the described step 2.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102730871A (en) * | 2011-04-01 | 2012-10-17 | 深圳恒通源水处理科技有限公司 | Recycling process of fluorine-containing wastewater |
| CN103102027B (en) * | 2013-02-26 | 2015-07-01 | 宏大中源太阳能股份有限公司 | Sewage treatment system and method for solar cell production |
| CN103172199B (en) * | 2013-03-21 | 2015-03-25 | 深圳市超纯环保股份有限公司 | Method for treating hydrofluoric acid wastewater |
| CN105084591B (en) * | 2015-08-11 | 2017-10-13 | 锦洋高新材料股份有限公司 | One kind fluorination high fluoride wastewater treatment technique of work |
| CN105126742B (en) * | 2015-08-11 | 2017-12-08 | 锦洋高新材料股份有限公司 | A kind of method using modified kaolin sorbent treatment fluoride waste |
| CN109422383A (en) * | 2017-09-05 | 2019-03-05 | 中国石油化工股份有限公司 | A kind of Treated sewage reusing treatment process |
| CN113620454A (en) * | 2020-05-08 | 2021-11-09 | 无锡蓝湾资源再生科技有限公司 | Tubular microfiltration membrane treatment system for copper-containing wastewater |
| CN112028393B (en) * | 2020-08-25 | 2021-06-22 | 浙江环之美环保科技有限公司 | Composite filtering membrane and preparation method thereof and industrial wastewater treatment method |
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| CN2778793Y (en) * | 2005-03-26 | 2006-05-10 | 王剑波 | Sewage treating plant with micro-electricity coagulate barrier separation |
| CN1778700A (en) * | 2004-11-18 | 2006-05-31 | 张宝泉 | Waste water treatment, recovery and utilization for power plant |
| US20080164209A1 (en) * | 2007-01-05 | 2008-07-10 | Orest Zacerkowny | Water treatment systems and methods |
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| CN1778700A (en) * | 2004-11-18 | 2006-05-31 | 张宝泉 | Waste water treatment, recovery and utilization for power plant |
| CN2778793Y (en) * | 2005-03-26 | 2006-05-10 | 王剑波 | Sewage treating plant with micro-electricity coagulate barrier separation |
| US20080164209A1 (en) * | 2007-01-05 | 2008-07-10 | Orest Zacerkowny | Water treatment systems and methods |
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Owner name: JIANGYIN SULV ALUMINUM INDUSTRY CO., LTD. Free format text: FORMER OWNER: SU CUNZHANG Effective date: 20120528 |
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Effective date of registration: 20120528 Address after: Three, 214423 work area, spring village, Zhouzhuang Town, Jiangyin, Jiangsu Patentee after: Jiangyin Sulv Aluminum Industry Co., Ltd. Address before: 214423 No. 6 Longshan Industrial Park, Zhouzhuang Town, Jiangsu, Jiangyin Patentee before: Su Cunzhang |
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Address after: 214423 three District, Shan Quan village, Zhouzhuang Town, Jiangyin, Jiangsu Patentee after: Jiangyin Xin Su Aluminum Technology Co., Ltd. Address before: 214423 three District, Shan Quan village, Zhouzhuang Town, Jiangyin, Jiangsu Patentee before: Jiangyin Sulv Aluminum Industry Co., Ltd. |
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