CN106007093A - Zero discharge method for heavy metal waste water - Google Patents
Zero discharge method for heavy metal waste water Download PDFInfo
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- CN106007093A CN106007093A CN201610557950.3A CN201610557950A CN106007093A CN 106007093 A CN106007093 A CN 106007093A CN 201610557950 A CN201610557950 A CN 201610557950A CN 106007093 A CN106007093 A CN 106007093A
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- Prior art keywords
- water
- membrane
- heavy metal
- waste water
- film
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
Abstract
The invention discloses a zero discharge method for heavy metal waste water. The zero discharge method comprises the following steps: feeding air to a regulation pool; stirring the waste water; adding quicklime, soda ash, sulfuric acid or hydrochloric acid in the process of feeding air and stirring; adding sodium hydroxide and stirring; performing solid-liquid separation on hydroxide precipitates in a precipitation tank; regulating pH of separated water to 7; performing filtration, microfiltration and nanofiltration on the neutral water in sequence through a quartz sand filter to remove impurities in leaching solution; using a selective adsorption function membrane for further treatment in a membrane filtration manner; rinsing the membrane with tap water; washing away the non-affinity adsorption impurities on the surface of the membrane; evaporating and crystallizing the purified filtering water with low-temperature vapor, and discharging reclaimed water and salt in rows. The method provided by the invention improves the operation stability of an evaporation crystallizer by removing heavy metal ions before reverse osmosis of concentrated water, calcium, magnesium and other hardness ions, silicon, COD and other pollutants.
Description
Technical field
The invention belongs to solid waste resource recovery processing technology field, be specifically related to the Zero emission method of a kind of heavy metal wastewater thereby.
Background technology
Heavy metal industrial effluent is the industrial wastewater that a kind of composition is extremely complex, essentially from mine, smelt, be electrolysed, electroplate, waste water that the enterprise such as pesticide, medicine, paint, pigment discharges.Mainly containing various heavy, oils and fats, soda acid, Organic substance etc. in waste water.This kind of waste water often pollutant levels are high, toxicity is big, be difficult to biodegradation, not only contaminant water environment, also the serious threat mankind and hydrobiological existence.In recent years, the heavy metal wastewater therebies such as copper, nickel, chromium the poisoning caused occurs repeatedly.Heavy metal pollution has become the great environmental problem being related to human health and life.
The method of tradition heavy-metal ion removal waste water is a lot, including the sedimentation method, electrochemical treatments technology, physical-chemical process, biochemical process etc., but all there is some weak point.
Chemical precipitation method is traditional and the electroplating waste water treatment technology of practicality, by adding such as the precipitant such as sodium hydroxide, carbonate, sulfide, carbaminate, benzoate in waste water, makes heavy metal precipitated and removes.This method processing cost is low, convenient management, adds that sand filtration can make effluent quality clarify, qualified discharge, a kind of economical and effective method of can yet be regarded as.But it also has its weak point, settling velocity is relatively slow, separates not thorough, needs extra dosing coagulant and flocculant.It is likely to cause secondary pollution, and sludge quantity is big, and the drawback that heavy metal is not easily recycled.
Summary of the invention
It is an object of the invention to provide the Zero emission method of a kind of heavy metal wastewater thereby, to solve the drawback that chemical precipitation method settling velocity of the prior art is slow, heavy metal is not easily recycled.
The technical solution adopted for the present invention to solve the technical problems is: the Zero emission method of a kind of heavy metal wastewater thereby, comprises the steps:
A, balancing tank is passed through air and waste water is stirred, quick lime is added during being passed through air and stirring, regulation PH to 8～8.5, after first order reaction, clarification, adding appropriate soda again, after secondary response, clarification precipitation, filtrate returns to former pond, add sulphuric acid or hydrochloric acid, regulate PH to 5～9；
B, in waste water, add sodium hydroxide being stirred, then make hydroxide precipitation realize solid-liquid separation in sedimentation tank, to the water regulation PH to 7 after separating；
C, the water being adjusted to neutrality is sequentially passed through quartz filter, microfiltration and nanofiltration, remove impurity in leachate, then use selective absorption functional membrane to process further in the way of membrane filtration；
D, use tap water flushing membrane, the impurity of non-for film surface affine absorption is washed out；
E, Membrane Materials crystallize: with Low Temperature Steam purifying filtered water is evaporated crystallization treatment and point row discharge purification water and the salt supplying reuse.
The Zero emission method of described a kind of heavy metal wastewater thereby, its adsorption function film is reverse osmosis membrane, and the operation Stress control of film is 3～5MPa, and operation temperature controls at 30～40 DEG C.
The Zero emission method of described a kind of heavy metal wastewater thereby, its adsorption function film is NF membrane, and the operation Stress control of film is 2～3MPa, and operation temperature controls at 30～40 DEG C.
The invention has the beneficial effects as follows: enter hardness ions, silicon, COD and other contaminant removal such as the heavy metal ion before dense water reverse osmosis, calcium and magnesium; protect dense water reverse osmosis main frame; make reverse osmosis main frame can run under high-recovery; reduce the water yield and the pollutant entering crystallizing evaporator; improve the salt concentration in water simultaneously, improve the operation stability of crystallizing evaporator；And due to its tubular membrane solid-liquid separation technique and feature, also have, due to chemical reaction, use less medicament, produce less mud.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail.
Embodiment 1
The invention discloses the Zero emission method of a kind of heavy metal wastewater thereby, comprise the steps
A, balancing tank is passed through air and waste water is stirred, quick lime is added during being passed through air and stirring, regulation PH to 8～8.5, after first order reaction, clarification, adding appropriate soda again, after secondary response, clarification precipitation, filtrate returns to former pond, add sulphuric acid or hydrochloric acid, regulate PH to 5～9；
B, in waste water, add sodium hydroxide being stirred, then make hydroxide precipitation realize solid-liquid separation in sedimentation tank, to the water regulation PH to 7 after separating；
C, by be adjusted to neutrality water sequentially pass through quartz filter, microfiltration and nanofiltration, remove impurity in leachate, selective absorption functional membrane is used to process further in the way of membrane filtration again, described adsorption function film is reverse osmosis membrane, the operation Stress control of film is 3～5MPa, and operation temperature controls at 30～40 DEG C；
D, use tap water flushing membrane, the impurity of non-for film surface affine absorption is washed out；
E, Membrane Materials crystallize: with Low Temperature Steam purifying filtered water is evaporated crystallization treatment and point row discharge purification water and the salt supplying reuse.
Embodiment 2:
Being that adsorption function film is NF membrane with the difference of embodiment 1, the operation Stress control of film is 2～3MPa, and operation temperature controls at 30～40 DEG C.
The principle of above-described embodiment only illustrative present invention and effect thereof; and the embodiment that part is used, for the person of ordinary skill of the art, without departing from the concept of the premise of the invention; can also make some deformation and improvement, these broadly fall into protection scope of the present invention.
Claims (3)
1. the Zero emission method of a heavy metal wastewater thereby, it is characterised in that comprise the steps:
A, balancing tank is passed through air and waste water is stirred, quick lime is added during being passed through air and stirring, regulation PH to 8～8.5, after first order reaction, clarification, adding appropriate soda again, after secondary response, clarification precipitation, filtrate returns to former pond, add sulphuric acid or hydrochloric acid, regulate PH to 5～9；
B, in waste water, add sodium hydroxide being stirred, then make hydroxide precipitation realize solid-liquid separation in sedimentation tank, to the water regulation PH to 7 after separating；
C, the water being adjusted to neutrality is sequentially passed through quartz filter, microfiltration and nanofiltration, remove impurity in leachate, then use selective absorption functional membrane to process further in the way of membrane filtration；
D, use tap water flushing membrane, the impurity of non-for film surface affine absorption is washed out；
E, Membrane Materials crystallize: with Low Temperature Steam purifying filtered water is evaporated crystallization treatment and point row discharge purification water and the salt supplying reuse.
The Zero emission method of a kind of heavy metal wastewater thereby the most according to claim 1, it is characterised in that described adsorption function film is reverse osmosis membrane, the operation Stress control of film is 3～5MPa, and operation temperature controls at 30～40 DEG C.
The Zero emission method of a kind of heavy metal wastewater thereby the most according to claim 1, it is characterised in that described adsorption function film is NF membrane, the operation Stress control of film is 2～3MPa, and operation temperature controls at 30～40 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610557950.3A CN106007093A (en) | 2016-07-15 | 2016-07-15 | Zero discharge method for heavy metal waste water |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610557950.3A CN106007093A (en) | 2016-07-15 | 2016-07-15 | Zero discharge method for heavy metal waste water |
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| CN106007093A true CN106007093A (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610557950.3A Pending CN106007093A (en) | 2016-07-15 | 2016-07-15 | Zero discharge method for heavy metal waste water |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106242143A (en) * | 2016-08-22 | 2016-12-21 | 西安皓海嘉环保工程有限责任公司 | A kind of processing method of electroplating wastewater zero |
| CN106865920A (en) * | 2017-04-18 | 2017-06-20 | 昆明标洁环保科技有限责任公司 | Deep treatment method and reuse technology containing acid waste water containing heavy metal ions |
| CN107572686A (en) * | 2017-08-31 | 2018-01-12 | 新奥环保技术有限公司 | The processing unit and method of a kind of waste liquid containing heavy metal |
| CN107973437A (en) * | 2017-10-25 | 2018-05-01 | 镇江市丹徒区华发五金有限公司 | A kind of Purification by filtration technique of copper-bearing industrial wastewater |
| CN112605094A (en) * | 2020-11-26 | 2021-04-06 | 重庆创绿环境保护有限公司 | Harmless treatment and green cyclic resource utilization method for high-salt-content hazardous waste |
-
2016
- 2016-07-15 CN CN201610557950.3A patent/CN106007093A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106242143A (en) * | 2016-08-22 | 2016-12-21 | 西安皓海嘉环保工程有限责任公司 | A kind of processing method of electroplating wastewater zero |
| CN106865920A (en) * | 2017-04-18 | 2017-06-20 | 昆明标洁环保科技有限责任公司 | Deep treatment method and reuse technology containing acid waste water containing heavy metal ions |
| CN106865920B (en) * | 2017-04-18 | 2020-10-30 | 昆明标洁环保科技有限责任公司 | Advanced treatment method and recycling process of acid wastewater containing heavy metal ions |
| CN107572686A (en) * | 2017-08-31 | 2018-01-12 | 新奥环保技术有限公司 | The processing unit and method of a kind of waste liquid containing heavy metal |
| CN107973437A (en) * | 2017-10-25 | 2018-05-01 | 镇江市丹徒区华发五金有限公司 | A kind of Purification by filtration technique of copper-bearing industrial wastewater |
| CN112605094A (en) * | 2020-11-26 | 2021-04-06 | 重庆创绿环境保护有限公司 | Harmless treatment and green cyclic resource utilization method for high-salt-content hazardous waste |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161012 |
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| WD01 | Invention patent application deemed withdrawn after publication |