CN110143688A - Nanofiltration concentrate processing method - Google Patents
Nanofiltration concentrate processing method Download PDFInfo
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- CN110143688A CN110143688A CN201910333560.1A CN201910333560A CN110143688A CN 110143688 A CN110143688 A CN 110143688A CN 201910333560 A CN201910333560 A CN 201910333560A CN 110143688 A CN110143688 A CN 110143688A
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- nanofiltration
- ultrafiltration
- tank
- reaction settling
- pumped
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- 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
-
- 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
-
- 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
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- 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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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to the processing techniques of nanofiltration concentrate, are especially the processing methods for the nanofiltration concentrate that landfill leachate treatment generates in the process；Middle dope in concentrate holding vessel is pumped into No. 1 reaction settling tank, ferric trichloride and PAM, stirring precipitating is added, supernatant liquor is pumped into No. 2 reactor tanks；Soda ash is added in No. 2 reaction settling tanks and PAM helps solidifying, precipitating, filters, filtrate pump enters ultrafiltration raw water tank；Ultrafiltration, nanofiltration, ultrafiltration, nanofiltration concentrate return respectively water inlet tank, be concentrated after a period of time, homogeneous precipitation object is precipitated in ultrafiltration, nanofiltration water inlet tank, is discharged into No. 3 reaction settling tanks, adds calcium chloride, after precipitating filtering, clear liquid returns to the first step and middle dope is handled together；Outlet water organic substance concentration and total hardness concentration are below outlet water organic substance and total hardness concentration in membrane filtration clear liquid after present invention processing, avoid the accumulation of humus and hardness ions in membrane bioreactor, and water outlet meets 2 discharge standard of GB16889-2008 table.
Description
Technical field
The present invention relates to the processing techniques of nanofiltration concentrate, are especially the nanofiltrations of generation during landfill leachate treatment
The processing method of concentrate.
Background technique
During handling waste water using nanofiltration at present, the nanofiltration concentrate of generation generallys use evaporation and concentration or leaching
It the methods of does not burn processing, also has using processing methods such as flocculation sedimentation, advanced oxidations.
Although existing method can partly or entirely solve the problems, such as the processing of nanofiltration concentrate, there is more problem: steaming
The solid waste that hair technique generates remains as solubility, and the mishandling possibility having as secondary pollution, or investment are big, operation at
This height, operation difficulty is big, cost-effective cannot solve the problems, such as the processing of nanofiltration concentrate.
Summary of the invention
In view of the above-mentioned problems existing in the prior art, the present invention provides a kind of the cost-effective of nanofiltration concentrate processing
Method.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of nanofiltration concentrate processing method, comprising the following steps:
(1) nanofiltration concentrate in concentrate holding vessel is pumped into No. 1 reaction settling tank, ferric trichloride is added, stir 20-
30min is to stirring evenly, and control pH value stirs quiescent setting 1hr 3.5 ~ 4 or so, and supernatant liquor is filtered with pump by bag direct
It is pumped into No. 2 reactor tanks, lower sediment is put into suction filtration tank, and for filtrate by being pumped into No. 2 reaction settling tanks, filter cake makees solid waste, after packaging
With project sludge merging treatment；
(2) soda ash is added in No. 2 reaction settling tanks, until without Precipitation, and add sodium hydroxide adjustment PH to 11-13, precipitating
1hr, supernatant liquor pump are pumped directly into No. 2 reactor tanks by bag filter, and lower sediment is put into suction filtration tank, and filtrate pump enters ultrafiltration raw water
Tank, filter cake make solid waste, after packaging and project sludge merging treatment；
(3) ultrafiltration raw water tank, online to adjust PH to neutrality, subsequent operation, same to conventional ultrafiltration, nanofiltration, ultrafiltration, nanofiltration concentrate return
Respectively water inlet tank is returned,
(4) it being concentrated after a period of time, homogeneous precipitation object is precipitated in ultrafiltration, nanofiltration water inlet tank, No. 3 reaction settling tanks are discharged into,
Calcium chloride is added according to sulfate concentration in reaction settling tank, and adjusts PH to 9-11, calcium sulfate is precipitated, is filtered through precipitating
Afterwards, clear liquid returns to the first step and middle dope is handled together；Filter cake is calcium sulfate, after packaging and remaining sludge merging treatment.
Preferably, the additive amount of ferric trichloride is 0.5-2 ‰ in the step (1).
Preferably, the additive amount of soda ash is 0.5-2 ‰ in the step (2).
Concentration liquid measure about 5% or so of the landfill leachate after nanofiltration twice, the main component of concentrate: difficult to degrade
The larger molecular organics such as humic acid and two valences and high price inorganic salts.
Technological principle: 1, in nanofiltration concentrate main component be the larger molecular organics and two valences difficult to degrade such as humic acid and
High price salt, (1), according to its physicochemical property, select suitable flocculant to be formed since the molecular weight of the organic matters such as humic acid is larger
It is insoluble in water or precipitating not soluble in water, the flocculate being formed simultaneously has both the suction-operated to organic matter, passes through precipitating or mistake
It filters most of organic matter to remove from water, while part inorganic salts are removed；(2) logical for remaining high price inorganic salts in water
Chemical tendering is crossed, so that most salt is converted into sodium chloride etc. can be by the monovalent salt of nanofiltration membrane；(3) will by coagulating sedimentation and
Nanofiltration dope after chemical tendering further removes wherein short grained organic matter and inorganic sediment by UF；(4) pass through sodium
Filter will further be concentrated by above-mentioned pretreated dope, and clear liquid penetrates nanofiltration membrane, return to the ultrafiltration Clear liquid tank of system, enter
Level-one nanofiltration is again introduced into nanofiltration dope system after concentrate reduces wherein sulfate concentration, passes through 1 ~ 4 step process again；
2, when starting dope reflux, nanofiltration dope concentration will be stepped up, but after repeatedly recycling, organic in dope
Object and high price inorganic salt concentration basically reach balance
It is using the beneficial effect of technical solution of the present invention:
Outlet water organic substance concentration and total hardness concentration are below film after method processed by the invention handles nanofiltration concentrate
Outlet water organic substance and total hardness concentration in cleaner liquid, effectively avoid humus and hardness ions in membrane bioreactor
Accumulation, and water outlet can meet 2 discharge standard of GB16889-2008 table, and former percolation liquid treatment membrane bio-reaction system can be enable steady
Fixed operation.
Specific embodiment
Below by specific embodiment, invention is further described in detail.Unless stated otherwise, implement below
Technology used in mode is routine techniques known to those skilled in the art；Used instrument and equipment and reagent
Deng being that those skilled in the art can be by for example commercially available equal acquisitions of public approach.
Embodiment 1
A kind of nanofiltration concentrate processing method, comprising the following steps:
(1), the middle dope in concentrate holding vessel is pumped into No. 1 reaction settling tank, ferric trichloride 0.5 ‰, 20-30min is added
To stirring evenly, control pH value stirs quiescent setting 1hr 3.5 ~ 4 or so, and supernatant liquor pump is pumped directly into 2 by bag filter
Number reactor tank, lower sediment are put into suction filtration tank, and for filtrate by being pumped into No. 2 reaction settling tanks, filter cake makees solid waste, after packaging and project
Sludge merging treatment；
(2), soda ash 0.5 ‰ is added in No. 2 reaction settling tanks, until without Precipitation, and add sodium hydroxide adjustment PH to 11-
13, precipitating 1hr or so, supernatant liquor pump is pumped directly into No. 2 reactor tanks by bag filter, and lower sediment is put into suction filtration tank, filtrate
By being pumped into ultrafiltration raw water tank, filter cake makees solid waste, after packaging and project sludge merging treatment；
(3), ultrafiltration raw water tank, online to adjust PH to neutrality, subsequent operation, same to conventional ultrafiltration, nanofiltration, ultrafiltration, nanofiltration concentrate
Respectively water inlet tank is returned,
(4), it being concentrated after a period of time, homogeneous precipitation object is precipitated in ultrafiltration, nanofiltration water inlet tank, No. 3 reaction settling tanks are discharged into,
Calcium chloride is added according to sulfate concentration in reaction settling tank, and adjusts PH to 9-11, calcium sulfate is precipitated, is filtered through precipitating
Afterwards, clear liquid returns to the first step and middle dope is handled together.Filter cake is calcium sulfate, after packaging and remaining sludge merging treatment.
Treated in the present embodiment outlet water organic substance concentration and the water outlet that total hardness concentration is below in membrane filtration clear liquid have
Machine object and total hardness concentration effectively avoid the accumulation of humus and hardness ions in membrane bioreactor, and being discharged can
Meet 2 discharge standard of GB16889-2008 table, former percolation liquid treatment membrane bio-reaction system stable operation can be enable.
Embodiment 2
A kind of nanofiltration concentrate processing method, comprising the following steps:
(1), the middle dope in concentrate holding vessel is pumped into No. 1 reaction settling tank, ferric trichloride 1.5 ‰, 20-30min is added
To stirring evenly, control pH value stirs quiescent setting 1hr 3.5 ~ 4 or so, and supernatant liquor pump is pumped directly into 2 by bag filter
Number reactor tank, lower sediment are put into suction filtration tank, and for filtrate by being pumped into No. 2 reaction settling tanks, filter cake makees solid waste, after packaging and project
Sludge merging treatment；
(2), soda ash 1.5 ‰ is added in No. 2 reaction settling tanks, until without Precipitation, and add sodium hydroxide adjustment PH to 11-
13, precipitating 1hr or so, supernatant liquor pump is pumped directly into No. 2 reactor tanks by bag filter, and lower sediment is put into suction filtration tank, filtrate
By being pumped into ultrafiltration raw water tank, filter cake makees solid waste, after packaging and project sludge merging treatment；
(3), ultrafiltration raw water tank, online to adjust PH to neutrality, subsequent operation, same to conventional ultrafiltration, nanofiltration, ultrafiltration, nanofiltration concentrate
Respectively water inlet tank is returned,
(4), it being concentrated after a period of time, homogeneous precipitation object is precipitated in ultrafiltration, nanofiltration water inlet tank, No. 3 reaction settling tanks are discharged into,
Calcium chloride is added according to sulfate concentration in reaction settling tank, and adjusts PH to 9-11, calcium sulfate is precipitated, is filtered through precipitating
Afterwards, clear liquid returns to the first step and middle dope is handled together.Filter cake is calcium sulfate, after packaging and remaining sludge merging treatment.
Treated in the present embodiment outlet water organic substance concentration and the water outlet that total hardness concentration is below in membrane filtration clear liquid have
Machine object and total hardness concentration effectively avoid the accumulation of humus and hardness ions in membrane bioreactor, and being discharged can
Meet 2 discharge standard of GB16889-2008 table, former percolation liquid treatment membrane bio-reaction system stable operation can be enable.
Embodiment 3
A kind of nanofiltration concentrate processing method, comprising the following steps:
(1), the middle dope in concentrate holding vessel is pumped into No. 1 reaction settling tank, ferric trichloride 2 ‰ is added, 20-30min is extremely
It stirs evenly, control pH value stirs quiescent setting 1hr 3.5 ~ 4 or so, and supernatant liquor pump is pumped directly into No. 2 by bag filter
Reactor tank, lower sediment are put into suction filtration tank, and for filtrate by being pumped into No. 2 reaction settling tanks, filter cake makees solid waste, and after packaging and project is dirty
Mud merging treatment；
(2), soda ash 2 ‰ is added in No. 2 reaction settling tanks, until without Precipitation, and sodium hydroxide adjustment PH to 11-13 is added,
1hr or so is precipitated, supernatant liquor pump is pumped directly into No. 2 reactor tanks by bag filter, and lower sediment is put into suction filtration tank, and filtrate passes through
It is pumped into ultrafiltration raw water tank, filter cake makees solid waste, after packaging and project sludge merging treatment；
(3), ultrafiltration raw water tank, online to adjust PH to neutrality, subsequent operation, same to conventional ultrafiltration, nanofiltration, ultrafiltration, nanofiltration concentrate
Respectively water inlet tank is returned,
(4), it being concentrated after a period of time, homogeneous precipitation object is precipitated in ultrafiltration, nanofiltration water inlet tank, No. 3 reaction settling tanks are discharged into,
Calcium chloride is added according to sulfate concentration in reaction settling tank, and adjusts PH to 9-11, calcium sulfate is precipitated, is filtered through precipitating
Afterwards, clear liquid returns to the first step and middle dope is handled together.Filter cake is calcium sulfate, after packaging and remaining sludge merging treatment.
Treated in the present embodiment outlet water organic substance concentration and the water outlet that total hardness concentration is below in membrane filtration clear liquid have
Machine object and total hardness concentration effectively avoid the accumulation of humus and hardness ions in membrane bioreactor, and being discharged can
Meet 2 discharge standard of GB16889-2008 table, former percolation liquid treatment membrane bio-reaction system stable operation can be enable.
Taking the above-mentioned ideal embodiment according to the present invention as inspiration, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.It is all in essence of the invention
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should all be included in the protection scope of the present invention.This
The technical scope of item invention is not limited to the contents of the specification, it is necessary to its technology is determined according to scope of the claims
Property range.
Claims (3)
1. a kind of nanofiltration concentrate processing method, which is characterized in that the treating method comprises following steps:
(1) nanofiltration concentrate in concentrate holding vessel is pumped into No. 1 reaction settling tank, ferric trichloride is added, stir 20-
30min is to stirring evenly, and control pH value stirs quiescent setting 1hr 3.5 ~ 4 or so, and supernatant liquor is filtered with pump by bag direct
It is pumped into No. 2 reactor tanks, lower sediment is put into suction filtration tank, and for filtrate by being pumped into No. 2 reaction settling tanks, filter cake makees solid waste, after packaging
With project sludge merging treatment；
(2) soda ash is added in No. 2 reaction settling tanks, until without Precipitation, and add sodium hydroxide adjustment PH to 11-13, precipitating
1hr, supernatant liquor pump are pumped directly into No. 2 reactor tanks by bag filter, and lower sediment is put into suction filtration tank, and filtrate pump enters ultrafiltration raw water
Tank, filter cake make solid waste, after packaging and project sludge merging treatment；
(3) ultrafiltration raw water tank, online to adjust PH to neutrality, subsequent operation, same to conventional ultrafiltration, nanofiltration, ultrafiltration, nanofiltration concentrate return
Respectively water inlet tank is returned,
(4) it being concentrated after a period of time, homogeneous precipitation object is precipitated in ultrafiltration, nanofiltration water inlet tank, No. 3 reaction settling tanks are discharged into,
Calcium chloride is added according to sulfate concentration in reaction settling tank, and adjusts PH to 9-11, calcium sulfate is precipitated, is filtered through precipitating
Afterwards, clear liquid returns to the first step and middle dope is handled together；Filter cake is calcium sulfate, after packaging and remaining sludge merging treatment.
2. nanofiltration concentrate processing method according to claim 1, it is characterised in that: ferric trichloride in the step (1)
Additive amount be 0.5-2 ‰.
3. nanofiltration concentrate processing method according to claim 1, it is characterised in that: soda ash adds in the step (2)
Dosage is 0.5-2 ‰.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910333560.1A CN110143688B (en) | 2019-04-24 | 2019-04-24 | Nanofiltration concentrate treatment method |
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| CN201910333560.1A CN110143688B (en) | 2019-04-24 | 2019-04-24 | Nanofiltration concentrate treatment method |
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| CN110143688B CN110143688B (en) | 2020-11-24 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030201225A1 (en) * | 2002-04-30 | 2003-10-30 | Josse Juan Carlos | Organic slurry treatment process |
| CN103964609A (en) * | 2014-05-16 | 2014-08-06 | 天津海普尔膜科技有限公司 | Membrane treatment method of landfill leachate concentrate |
| CN105417845A (en) * | 2015-11-13 | 2016-03-23 | 浙江工商大学 | Treating device and method for rubbish infiltration membrane concentrated solution |
| CN106277613A (en) * | 2016-08-29 | 2017-01-04 | 江苏维尔利环保科技股份有限公司 | Method for treating garbage percolation liquid |
| CN107082507A (en) * | 2017-04-26 | 2017-08-22 | 四川吉奥安欣环保科技有限公司 | A kind of method for handling percolate |
| EP3260423A1 (en) * | 2015-02-19 | 2017-12-27 | Mitsubishi Heavy Industries, Ltd. | Water treatment system and method |
| CN108715491A (en) * | 2018-06-21 | 2018-10-30 | 江苏天楹环保能源成套设备有限公司 | A kind of processing method of nanofiltration concentrate to landfill leachate |
-
2019
- 2019-04-24 CN CN201910333560.1A patent/CN110143688B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030201225A1 (en) * | 2002-04-30 | 2003-10-30 | Josse Juan Carlos | Organic slurry treatment process |
| CN103964609A (en) * | 2014-05-16 | 2014-08-06 | 天津海普尔膜科技有限公司 | Membrane treatment method of landfill leachate concentrate |
| EP3260423A1 (en) * | 2015-02-19 | 2017-12-27 | Mitsubishi Heavy Industries, Ltd. | Water treatment system and method |
| CN105417845A (en) * | 2015-11-13 | 2016-03-23 | 浙江工商大学 | Treating device and method for rubbish infiltration membrane concentrated solution |
| CN106277613A (en) * | 2016-08-29 | 2017-01-04 | 江苏维尔利环保科技股份有限公司 | Method for treating garbage percolation liquid |
| CN107082507A (en) * | 2017-04-26 | 2017-08-22 | 四川吉奥安欣环保科技有限公司 | A kind of method for handling percolate |
| CN108715491A (en) * | 2018-06-21 | 2018-10-30 | 江苏天楹环保能源成套设备有限公司 | A kind of processing method of nanofiltration concentrate to landfill leachate |
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| CN110143688B (en) | 2020-11-24 |
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