CN102583831A - Wastewater treatment and reusing membrane separation treatment technology - Google Patents

Wastewater treatment and reusing membrane separation treatment technology Download PDF

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Publication number
CN102583831A
CN102583831A CN2012100600868A CN201210060086A CN102583831A CN 102583831 A CN102583831 A CN 102583831A CN 2012100600868 A CN2012100600868 A CN 2012100600868A CN 201210060086 A CN201210060086 A CN 201210060086A CN 102583831 A CN102583831 A CN 102583831A
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China
Prior art keywords
wastewater
treatment
membrane separation
water
technology
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Pending
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CN2012100600868A
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Chinese (zh)
Inventor
潘远东
冯臻
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GUANGXI YUDA WATER TREATMENT EQUIPMENT ENGINEERING Co Ltd
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GUANGXI YUDA WATER TREATMENT EQUIPMENT ENGINEERING Co Ltd
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Priority to CN2012100600868A priority Critical patent/CN102583831A/en
Publication of CN102583831A publication Critical patent/CN102583831A/en
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Abstract

The invention relates to a wastewater treatment and reusing membrane separation treatment technology which is characterized by treating heavy metal wastewater by using the pretreatment of 'preformed precipitation + fiber filter + ultrafiltration' and the membrane separation technology of 'nanofiltration + reverse osmosis + mixed bed', so that the treated wastewater can reach the boiler water standards, and equipment and electrified control is beneficial to accurately and safely controlling wastewater treatment equipment. In the invention, the purpose of real wastewater zero emission is realized by the application of the membrane technology, the reuse rate of wastewater reaches 75-80%, the rest wastewater is conveyed back to a regulating pool for continued circular treatment, metal ions are finally transported outwards or reused in the main form of sludge, and the possibility of affecting environment by heavy metal wastewater can be reduced as much as possible.

Description

Wastewater treatment and reuse membrane separation treating process technology
Technical field
The present invention relates to membrane separation technique, relate in particular to noble metal recovery, precipitate and separate, waste water recycling process, be specially a kind of smelting enterprise Industrial Wastewater Treatment membrane separation process.
Background technology
At present; The countries in the world process for treating heavy-metal waste water mainly contains three types: the first kind is the method that heavy metal ions in wastewater is gone out through the generation chemical reaction, comprises neutralization precipitation method, sulphide precipitation, ferrite coprecipitation method, chemical reduction method, electrochemical reducing and high molecular heavy metals trapping agent method etc.Second type be make in the waste water heavy metal under the condition that does not change its chemical form, adsorb, concentrate, isolating method, comprise absorption, SX, evaporation and freezing method, IX and membrane sepn etc.The 3rd type is the method that heavy metal in the waste water is removed in effect such as the flocculation, absorption, accumulation, enrichment by mikrobe or plant, comprising biofloculation, biochemical process and plant ecological reparation etc.For three above-mentioned class method for distinguishing, the first kind is very strong to the specific aim of heavy metal, if contain in the waste water various heavy then effect weaken obviously, and, cause the secondary pollution of heavy metal easily; The much more loaded down with trivial details troubles of second type treatment scheme; The 3rd type cost is higher, and the cycle of handling is longer, under the situation of handling continuously and handling in a large number, is easy to the phenomenon that treatment effect is declined to a great extent.
Summary of the invention
The technical problem that the present invention solved is to provide a kind of wastewater treatment and reuse membrane separation treating process technology, to solve the shortcoming in the above-mentioned background technology.
The technical problem that the present invention solved adopts following technical scheme to realize:
Wastewater treatment and reuse membrane separation treating process technology; It is the pre-treatment of adopting " pre precipitation+through fabric filter+ultrafiltration " and the membrane separation process of " nanofiltration+r-o-+mix bed "; To the technology that heavy metal wastewater thereby carries out Separation and Recovery and processing, its idiographic flow is following.
1. removal of impurities: waste water carries out precipitation process after oil trap is removed oil purification, removes macrobead foreign material such as sandstone, reduces SS (suspension content in the water quality).
2. filter: the suspended substance that adopts fabric filter to remove in the waste water reaches the particle greater than 1 μ m; Most bacterium, algae, colloidalmaterial and small particulate matter are removed; Carry out continuous Microfiltration again; The SDI value (on behalf of particle in the water, colloid and other, pollution index can block the object content of various water correction plants) that makes water outlet is less than 5.Fiber filter media has characteristics such as anti-strong acid, highly basic in the said fabric filter.
3. membrane sepn: water outlet is through regulating pH value to 6.5 ~ 7.5 after HPP rises to ultrafiltration, the nanofiltration system device carries out desalting treatment.In this process, the principal feature of nf membrane is to realize separating of divalent ion and monovalent ion, holds back bivalent ions performance and is higher than 98%.After cationic exchange is handled, produce water water quality and be superior to the industrial circulate water water quality standard, can be used for industrial cycle water system or other water of productive use.
4. exchange again: the water that will go up after step exchanges is handled through the positive resins exchange of increase after neutralizing treatment system; Rise to security personnel's strainer by pump again and get into r-o-, mixed-bed resin exchange processing again, water outlet this moment can reach middle and high pressure BW standard.
5. reclaim: will go up water outlet after the step process derives to reclaim and uses; To handle remaining dense water centralized collection handles; Add PAM polymeric flocculants such as (SEPIGEL 305s) and flocculate, will precipitate again through chamber-type press filter and handle, the mud outward transport or the recovery of generation.
Because the trade effluent composition of smelting enterprise is complicated, principal pollutant are toxic substances such as Zn, Cd, Pb, As, Hg, and the discharging variation water quality is bigger, how to reduce waste water to contact with human body, stops waste water and effluxes the emphasis that is process choice.In the present invention; Application of membrane realizes the purpose of waste water zero emission truly; Wastewater recycle rate reaches 75% ~ 80%; Residue waste water carries back equalizing tank to continue circular treatment again, and metals ion is mainly transported outward or reuse with sludge form at last, can reduce the possibility of heavy metal wastewater thereby to environmental influence as much as possible.
Beneficial effect:
The membrane separation process of the pre-treatment that the present invention adopts " pre precipitation+through fabric filter+ultrafiltration " and " nanofiltration+r-o-+mix bed "; Make the waste water of handling can reach the BW standard, equipmentization, electrified control help controlling accurately, safely sewage treatment equipment.Wastewater recycle rate reaches 75% ~ 80% in the present invention, can reduce the possibility of heavy metal wastewater thereby to environmental influence as much as possible.
Embodiment
For technique means, creation characteristic that the present invention is realized, reach purpose and effect and be easy to understand and understand, further set forth in the face of the present invention down.
The membrane separation process of the pre-treatment that the present invention adopts " pre precipitation+through fabric filter+ultrafiltration " and " nanofiltration+r-o-+mix bed " is handled heavy metal wastewater thereby, and idiographic flow is following.
1. removal of impurities: zinc-containing water carries out precipitation process after oil trap is removed oil purification, removes macrobead foreign material such as sandstone, reduces SS (suspension content in the water quality).
2. filter: (concrete parameter is confirmed after by measuring in the change of water quality parameter through the water outlet of removal step; Control with ultrasonic level gage) stable after; Pump to fabric filter by lift pump; The suspended substance of removing in the waste water reaches the particle greater than 1 μ m, and most bacterium, algae, colloidalmaterial and small particulate matter are removed, and carries out continuous Microfiltration again; The SDI value (on behalf of particle in the water, colloid and other, pollution index can block the object content of various water correction plants) that makes water outlet is less than 5.Fiber filter media has characteristics such as anti-strong acid, highly basic in the said fabric filter.
3. membrane sepn: because ultrafiltration and nanofiltration have relatively high expectations to pH value, can subsequent technique after the pH regulator pond is regulated, about adjusting pH value to 7.0 after HPP rises to ultrafiltration, the nanofiltration system device carries out desalting treatment.In this process, the principal feature of nf membrane is to realize separating of divalent ion and monovalent ion, holds back bivalent ions performance and is higher than 98%.After cationic exchange is handled, produce water water quality and be superior to the industrial circulate water water quality standard, can be used for industrial cycle water system or other water of productive use.
4. exchange again: the water that will go up after step exchanges is handled through the positive resins exchange of increase after neutralizing treatment system; Rise to security personnel's strainer by pump again and get into r-o-, mixed-bed resin exchange processing again, water outlet this moment can reach middle and high pressure BW standard.
5. reclaim: will go up water outlet after the step process derives to reclaim and uses; To handle remaining dense water centralized collection handles; Add PAM polymeric flocculants such as (SEPIGEL 305s) and carry out flocculation sediment at sludge thickener; With sludge pump deposition is delivered to chamber-type press filter and advances to handle the mud compression, outward transport or reuse behind the formation sludge cake.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; The present invention is not restricted to the described embodiments; That describes in the foregoing description and the specification sheets just explains principle of the present invention; Under the prerequisite that does not break away from spirit and scope of the invention, the present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection.The scope of the claimed invention by the appended claims and their equivalents defined .

Claims (1)

1. wastewater treatment and reuse membrane separation treating process technology is characterized in that, is the pre-treatment of adopting " pre precipitation+through fabric filter+ultrafiltration " and the membrane separation process of " nanofiltration+r-o-+mix bed ", and heavy metal wastewater thereby is handled, and flow process is following:
1. removal of impurities: waste water carries out precipitation process after oil trap is removed oil purification, removes macrobead foreign material such as sandstone, reduces SS;
2. filter: the suspended substance that adopts fabric filter to remove in the waste water reaches the particle greater than 1 μ m, and most bacterium, algae, colloidalmaterial and small particulate matter are removed, and carries out continuous Microfiltration again, and the SDI value that makes water outlet is less than 5;
3. membrane sepn: water outlet is through regulating pH value to 6.5 ~ 7.5 after HPP rises to ultrafiltration, the nanofiltration system device carries out desalting treatment;
4. exchange again: the water that will go up after step exchanges is handled through the positive resins exchange of increase after neutralizing treatment system, rises to security personnel's strainer by pump again and gets into r-o-, mixed-bed resin exchange processing again;
5. reclaim: will go up water outlet after the step process derives to reclaim and uses, and will handle remaining dense water centralized collection and handle, and adds flocculation agent and flocculates, and will precipitate through chamber-type press filter again and handle, the perhaps recovery of mud outward transport of generation.
CN2012100600868A 2012-03-09 2012-03-09 Wastewater treatment and reusing membrane separation treatment technology Pending CN102583831A (en)

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Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102897944A (en) * 2012-07-30 2013-01-30 北京伊普国际水务有限公司 System for deeply processing difficultly degradable organic waste water
CN103172203A (en) * 2013-03-28 2013-06-26 南京中电环保股份有限公司 Pretreatment method of anti-osmosis strong brine
CN103523980A (en) * 2013-10-29 2014-01-22 中国华电工程(集团)有限公司 Method and system for high-efficiency recovery of high-salinity mine water
CN103629659A (en) * 2013-12-12 2014-03-12 碧海舟(北京)石油化工设备有限公司 Process for producing heat by wastewater and biomass
CN103626331A (en) * 2013-11-08 2014-03-12 南京中电环保股份有限公司 Desulfurization wastewater zero discharge treatment device and method
CN104891701A (en) * 2014-03-05 2015-09-09 天津福润龙科技发展有限公司 Wastewater purification apparatus and wastewater treatment process
CN105923817A (en) * 2016-05-09 2016-09-07 南京海益环保工程有限公司 Oil-containing wastewater treatment technology

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Publication number Priority date Publication date Assignee Title
CN1408653A (en) * 2002-09-24 2003-04-09 天津大学 Producing process and technology for electronic grade water by intergrated film process
CN101875520A (en) * 2010-08-10 2010-11-03 南京师范大学 Processing method of electroplating wastewater containing cyanogens and chrome
CN101935118A (en) * 2010-08-16 2011-01-05 刘春喜 Process for purifying and recycling hot water by membrane method
WO2011015041A1 (en) * 2009-08-07 2011-02-10 无锡尚德太阳能电力有限公司 Wastewater treatment method and system using the method
US8101083B2 (en) * 2007-08-20 2012-01-24 Earth Renaissance Technologies, Llc Pre-treatment reverse osmosis water recovery method for brine retentate metals removal
CN102358644A (en) * 2011-06-28 2012-02-22 中南大学 Membrane treatment process for heavy metal waste water generated during PCB production process

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1408653A (en) * 2002-09-24 2003-04-09 天津大学 Producing process and technology for electronic grade water by intergrated film process
US8101083B2 (en) * 2007-08-20 2012-01-24 Earth Renaissance Technologies, Llc Pre-treatment reverse osmosis water recovery method for brine retentate metals removal
WO2011015041A1 (en) * 2009-08-07 2011-02-10 无锡尚德太阳能电力有限公司 Wastewater treatment method and system using the method
CN101875520A (en) * 2010-08-10 2010-11-03 南京师范大学 Processing method of electroplating wastewater containing cyanogens and chrome
CN101935118A (en) * 2010-08-16 2011-01-05 刘春喜 Process for purifying and recycling hot water by membrane method
CN102358644A (en) * 2011-06-28 2012-02-22 中南大学 Membrane treatment process for heavy metal waste water generated during PCB production process

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102897944A (en) * 2012-07-30 2013-01-30 北京伊普国际水务有限公司 System for deeply processing difficultly degradable organic waste water
CN103172203A (en) * 2013-03-28 2013-06-26 南京中电环保股份有限公司 Pretreatment method of anti-osmosis strong brine
CN103172203B (en) * 2013-03-28 2014-10-08 南京中电环保股份有限公司 Pretreatment method of anti-osmosis strong brine
CN103523980A (en) * 2013-10-29 2014-01-22 中国华电工程(集团)有限公司 Method and system for high-efficiency recovery of high-salinity mine water
CN103626331A (en) * 2013-11-08 2014-03-12 南京中电环保股份有限公司 Desulfurization wastewater zero discharge treatment device and method
CN103629659A (en) * 2013-12-12 2014-03-12 碧海舟(北京)石油化工设备有限公司 Process for producing heat by wastewater and biomass
CN104891701A (en) * 2014-03-05 2015-09-09 天津福润龙科技发展有限公司 Wastewater purification apparatus and wastewater treatment process
CN105923817A (en) * 2016-05-09 2016-09-07 南京海益环保工程有限公司 Oil-containing wastewater treatment technology

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Application publication date: 20120718