CN103183422A - Treatment process for heavy metal wastewater - Google Patents
Treatment process for heavy metal wastewater Download PDFInfo
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- CN103183422A CN103183422A CN2011104491723A CN201110449172A CN103183422A CN 103183422 A CN103183422 A CN 103183422A CN 2011104491723 A CN2011104491723 A CN 2011104491723A CN 201110449172 A CN201110449172 A CN 201110449172A CN 103183422 A CN103183422 A CN 103183422A
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Abstract
The invention discloses a treatment process for heavy metal wastewater. The process includes the steps of: collecting wastewater by a collection pool, introducing wastewater in the collection pool into an oil separation pool to conduct oil removal, then making the wastewater enter a comprehensive regulation pool, adding a small amount of air and conducting stirring to obtain uniform water quality, bringing the effluent water from the comprehensive regulation pool into a pH regulation pool I, adding liquid alkali to regulate the pH value to 8.0-10.0, letting the effluent water from the pH regulation pool I enter a tubular ultrafiltration membrane system by a concentration groove to undergo a filtration treatment, leading the effluent water from the tubular ultrafiltration membrane system to a pH regulation pool II and adding an acid to perform neutralization, making the neutralized effluent water enter an RO membrane system, carrying out filtration treatment by an RO membrane so as to obtain recyclable effluent water. The tubular ultrafiltration membrane adopted in the invention employs a Duraflow tubular ultrafiltration membrane (DF membrane), and makes use of pressure and speed to achieve solid-liquid separation with no need of a flocculation pool and a reaction pool, so that the land area and the reagent are saved. As the DF membrane has a pore size of less than 0.03 micrometer and a special decontamination ability, clear water can be output after sewage enters the membrane tube, metals, TSS and COD can be removed by as single step, and the effluent water passing the DF membrane can be directly enter the RO membrane system.
Description
Technical field:
The present invention relates to a kind of waste water treatment process, relate in particular to a kind of good purification, reduce the heavy metal waste water treatment process that pollutes.
Background technology:
Metallic pollution refers to the environmental pollution that caused by heavy metal or its compound.Mainly by due to the human factors such as mining, exhaust gas emission, sewage irrigation and use heavy metal goods.Heavy metal contamination is different with the pollution of other organic compound, and much organic compound can reduce hazardous property or releasing by the physics of nature own, chemistry or biological purification; And heavy metal has enriching, is difficult in the environment to degrade.At present China is in the exploitation of heavy metal, smelting, the course of processing, causes many heavy metals to enter atmosphere, water, soil as lead, mercury, cadmium, cobalt etc. and causes the serious environmental pollution, as with useless heavy metal mercury etc.; Heavy metal extensively distributes in atmosphere, water body, soil, organism, and bed mud storage vault and the Final Destination of heavy metal often; When environmental change, heavy metal form in the bed mud will take place to transform and discharge and pollute, heavy metal can not be by biological degradation, but has biological accumulation, can directly threaten higher organism to comprise the mankind, the relevant expert points out, heavy metal has irreversibility to the pollution of soil, and polluted soil is not administered value, can only adjust varieties of plant and be avoided, therefore, the bed mud heavy metal pollution problem is subject to people's attention day by day.Heavy metal is energy and protein and the strong interaction of various enzyme generation in human body, they are lost activity, also may enrichment in some organ of human body, if surpass the tolerant limit of human body, can cause human body acute poisoning, subacute poisoning, chronic poisoning etc., the people be known from experience cause very big harm, for example, minamata disease (mercury pollution) and itai-itai disease nuisance diseases such as (cadmium pollutions) that Japan takes place are all caused by heavy metal contamination.
Also invented the treatment process of heavy metal wastewater thereby in the practice, with the disclosed patent No. of State Intellectual Property Office: 200910105943.X, " a kind for the treatment of process of heavy metal industrial effluent " is example, this patent mainly utilizes pharmaceutical chemistry reaction, flocculation reaction, tubular type micro-filtration, reverse osmosis process to handle, this treatment process does not need the chemical precipitation pond to save floor space, investment reduces, but adopting existing tube type filter membrance can not reach 100% filters, adopt this filter method only to replace the effect of precipitation simultaneously, can not play the ultra-filtration filters function.
Summary of the invention:
The present invention is directed to the deficiencies in the prior art, the heavy metal waste water treatment process that provides a kind of simple to operate, good purification, minimizing to pollute.
Be to realize the above object, the present invention by the following technical solutions:
Heavy metal waste water treatment process comprises following method:
(1) collecting tank is collected waste water, the waste water in the collecting tank is introduced oil trap stop 30min;
(2) enter the comprehensive adjustment pond after oil trap is deoiled and add the little air water quality that stirs, waste water stops 8h after entering the comprehensive adjustment pond;
(3) water outlet of comprehensive adjustment pond enters PH equalizing tank I and adds liquid caustic soda and regulate between the pH value 8.0-10.0;
(4) PH equalizing tank I water outlet enters the processing of tubular ultra-filtration membrane system filtration through thickener, and thickener receives the water outlet through former process, receives simultaneously from continuous backflow of tubular ultra-filtration membrane system to comprise the dense water of suspended solid material;
(5) water outlet of tubular ultra-filtration membrane system enters PH equalizing tank II and adds acid neutralization, adjusts water ph value to 7-8;
(6) water outlet after the neutralization enters RO film system, but obtains the water outlet of reuse through the final filtration treatment of RO film.
Described tubular ultra-filtration membrane system is that the tubular ultra-filtration membrane below the 0.03 μ m, anti-scavenging pump are formed by recycle pump, aperture; Waste water in the thickener promotes by recycle pump that to enter the aperture with high flow rate be tubular ultra-filtration membrane below the 0.03 μ m, under the ordering about of pressure and speed, make suspended solid material and liquid separation by tubular ultra-filtration membrane, cross flow filter, the filtrate after filtering is sent into PH equalizing tank II by row's filtrate pipe; Anti-scavenging pump constantly carries out clean to tubular ultra-filtration membrane.
The Duraflow tubular ultra-filtration membrane that described tubular ultra-filtration membrane adopts U.S. Duraflow company to produce is called for short the DF film.
Described RO film system is made up of security personnel's strainer, RO film device, RO cleaning system; The water outlet of PH equalizing tank II is held back the mechanical impurity that may leak in preposition equipment and the pipeline through security personnel's strainer, by sending into the RO film device after the high-pressure pump supercharging, but seeing through the water outlet that obtains reuse after the RO film carries out desalination under the effect of pressure, returning tubular ultra-filtration membrane after the water that salt sees through the RO film with small portion accumulates dense water; The RO cleaning system is removed the pollution substance in the RO film device, to recover the primary characteristic of film.
Described tubular ultra-filtration membrane regularly adopts the sulfuric acid of 2-5% and 2% chlorine bleach liquor to clean.
Patent advantage of the present invention is: (1) tubular ultra-filtration membrane adopts Duraflow tubular ultra-filtration membrane (DF film), utilizes pressure and speed to reach solid-liquid separation, need not flocculation basin and reaction tank, saves land area, saves medicament; (2) because the DF membrane pore size is below the 0.03 μ m, have special soil removability, sewage enters film pipe output clear water, but metal, TSS and COD are removed in single step, and can directly enter RO film system through the water outlet of DF film; (3) has special stain resistance because of DF film tube-surface, dirt is only stockpiled in the surface can not penetrate into membranous wall, sulfuric acid through 2～5% and 2% clorox can recover 100% flux after cleaning, and remove the needed back flushing operation of items of equipment from, increase work efficiency.
Description of drawings:
Fig. 1 is process flow sheet of the present invention;
Embodiment:
In order to deepen the understanding of the present invention, the invention will be further described below in conjunction with embodiment.
Heavy metal wastewater thereby enters collecting tank 1 and collects waste water, waste water in the collecting tank 1 is introduced oil trap 2, waste water enters oil trap 2 backs and stops 30min, water outlet after deoiling enters comprehensive adjustment pond 3 and adds the little airs water quality that stirs, stop 8h, water outlet enters PH equalizing tank I4 and adds between the liquid caustic soda 15 adjusting pH value 8.0-10.0, and PH equalizing tank I4 water outlet enters tubular ultra-filtration membrane system 6 filtration treatment through thickener 5; The water outlet that thickener 5 receives through former process receives the dense water that comprises suspended solid material from the 6 continuous backflows of tubular ultra-filtration membrane system simultaneously; Tubular ultra-filtration membrane system 6 is that tubular ultra-filtration membrane 8, anti-scavenging pump 9 below the 0.03 μ m formed by recycle pump 7, aperture; The waste water that thickener is 5 li promotes by recycle pump 7 that to enter the aperture with high flow rate be tubular ultra-filtration membrane 8 below the 0.03 μ m, under the ordering about of pressure and speed, makes suspended solid material and liquid separation, cross flow filter by tubular ultra-filtration membrane; Filtrate after filtering is sent into PH equalizing tank II10 by row's filtrate pipe; Mud in the thickener 5 is through after the continuous concentration, when sludge quantity arrives 50% left and right sides, discharge unit mud to be reducing sludge concentration, and sludge discharged is handled to entering pressure filter 17 after sludge thickener 16 concentrates, or can directly be evacuated to pressure filter 17 direct press filtrations processing with pump; 6 water outlets of tubular ultra-filtration membrane system enter PH equalizing tank II 10 and add acid neutralization, and the water ph value that goes out after the neutralization is adjusted to 7-8 and enters RO film system 11; RO film system is made up of security personnel's strainer 12, RO film device 13, RO cleaning system 14, the water outlet of PH equalizing tank II10 is held back the mechanical impurity that may leak in preposition equipment and the pipeline through security personnel's strainer 12, by sending into RO film device 13 after the high-pressure pump supercharging, but seeing through the water outlet that obtains reuse after the RO film carries out desalination under the effect of pressure, returning tubular ultra-filtration membrane 8 after the water that salt sees through the RO film with small portion accumulates dense water; The pollution substance that RO cleaning system 14 is removed in the RO film device is to recover the primary characteristic of film.
Tubular ultra-filtration membrane regularly adopts the sulfuric acid of 2-5% and 2% chlorine bleach liquor to clean, thereby reaches the purpose of recovering flux, and sulfuric acid mainly is with solving metal ion to the pollution of film; And clorox mainly solves organism to the pollution problem of film, by the strong oxidizing property of clorox, can thoroughly solve the Organic pollutants problem.
The present invention has that technology is simple, cost is low, easy to operate, the purification of waste water treatment effect is good, reduce advantages such as pollutions, down to reaching waste water reclamation, multiplexing, takes full advantage of water resources.
Claims (5)
1. heavy metal waste water treatment process is characterized in that: may further comprise the steps:
(1) collecting tank is collected waste water, the waste water in the collecting tank is introduced oil trap stop 30min;
(2) enter the comprehensive adjustment pond after oil trap is deoiled and add the little air water quality that stirs, waste water stops 8h after entering the comprehensive adjustment pond;
(3) water outlet of comprehensive adjustment pond enters PH equalizing tank I and adds liquid caustic soda and regulate between the pH value 8.0-10.0;
(4) PH equalizing tank I water outlet enters the processing of tubular ultra-filtration membrane system filtration through thickener, and thickener receives the water outlet through former process, receives simultaneously from continuous backflow of tubular ultra-filtration membrane system to comprise the dense water of suspended solid material;
(5) water outlet of tubular ultra-filtration membrane system enters PH equalizing tank II and adds acid neutralization, adjusts water ph value to 7-8;
(6) water outlet after the neutralization enters RO film system, but obtains the water outlet of reuse through the final filtration treatment of RO film.
2. heavy metal waste water treatment process according to claim 1 is characterized in that: described tubular ultra-filtration membrane system is that the tubular ultra-filtration membrane below the 0.03 μ m, anti-scavenging pump are formed by recycle pump, aperture; Waste water in the thickener promotes by recycle pump that to enter the aperture with high flow rate be tubular ultra-filtration membrane below the 0.03 μ m, under the ordering about of pressure and speed, make suspended solid material and liquid separation by tubular ultra-filtration membrane, cross flow filter, the filtrate after filtering is sent into PH equalizing tank I I by row's filtrate pipe; Anti-scavenging pump constantly carries out clean to tubular ultra-filtration membrane.
3. heavy metal waste water treatment process according to claim 1 is characterized in that: described RO film system is made up of security personnel's strainer, RO film device, RO cleaning system; The water outlet of PH equalizing tank II is held back the mechanical impurity that may leak in preposition equipment and the pipeline through security personnel's strainer, by sending into the RO film device after the high-pressure pump supercharging, but seeing through the water outlet that obtains reuse after the RO film carries out desalination under the effect of pressure, returning tubular ultra-filtration membrane after the water that salt sees through the RO film with small portion accumulates dense water; The RO cleaning system is removed the pollution substance in the RO film device, to recover the primary characteristic of film.
4. heavy metal waste water treatment process according to claim 2 is characterized in that: the Duraflow tubular ultra-filtration membrane that described tubular ultra-filtration membrane adopts U.S. Duraflow company to produce, abbreviation DF film.
5. heavy metal waste water treatment process according to claim 2 is characterized in that: described tubular ultra-filtration membrane regularly adopts the sulfuric acid of 2-5% and 2% chlorine bleach liquor to clean.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104491723A CN103183422A (en) | 2011-12-29 | 2011-12-29 | Treatment process for heavy metal wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104491723A CN103183422A (en) | 2011-12-29 | 2011-12-29 | Treatment process for heavy metal wastewater |
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| CN103183422A true CN103183422A (en) | 2013-07-03 |
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| CN2011104491723A Pending CN103183422A (en) | 2011-12-29 | 2011-12-29 | Treatment process for heavy metal wastewater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105692992A (en) * | 2016-01-27 | 2016-06-22 | 苏州得润环保科技有限公司 | Recycling and disposal system for nickel-containing wastewater |
| CN107226556A (en) * | 2017-07-25 | 2017-10-03 | 湖南湘牛环保实业有限公司 | A kind of nickeliferous heavy metal containing wastewater treatment of high salt low concentration and reclamation set |
| CN107792951A (en) * | 2016-08-30 | 2018-03-13 | 广东益诺欧环保股份有限公司 | A kind of separation of heavy metal ions film device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100864587B1 (en) * | 2007-05-25 | 2008-10-20 | 호서대학교 산학협력단 | Method and apparatus for disposing wastewater in digital textile printing |
| CN101830581A (en) * | 2009-03-09 | 2010-09-15 | 深圳市金达莱环保股份有限公司 | Method for treating heavy metal industrial sewage |
| CN102190392A (en) * | 2010-03-12 | 2011-09-21 | 上海瑞勇实业有限公司 | RO dense water standard discharge technology in reclaimed water reuse |
-
2011
- 2011-12-29 CN CN2011104491723A patent/CN103183422A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100864587B1 (en) * | 2007-05-25 | 2008-10-20 | 호서대학교 산학협력단 | Method and apparatus for disposing wastewater in digital textile printing |
| CN101830581A (en) * | 2009-03-09 | 2010-09-15 | 深圳市金达莱环保股份有限公司 | Method for treating heavy metal industrial sewage |
| CN102190392A (en) * | 2010-03-12 | 2011-09-21 | 上海瑞勇实业有限公司 | RO dense water standard discharge technology in reclaimed water reuse |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105692992A (en) * | 2016-01-27 | 2016-06-22 | 苏州得润环保科技有限公司 | Recycling and disposal system for nickel-containing wastewater |
| CN105692992B (en) * | 2016-01-27 | 2019-04-02 | 苏州得润环保科技有限公司 | A kind of nickel-containing waste water recovery and processing system |
| CN107792951A (en) * | 2016-08-30 | 2018-03-13 | 广东益诺欧环保股份有限公司 | A kind of separation of heavy metal ions film device |
| CN107226556A (en) * | 2017-07-25 | 2017-10-03 | 湖南湘牛环保实业有限公司 | A kind of nickeliferous heavy metal containing wastewater treatment of high salt low concentration and reclamation set |
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Application publication date: 20130703 |