CN105481178A - Landfill leachate treatment process with softening treatment - Google Patents

Landfill leachate treatment process with softening treatment Download PDF

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Publication number
CN105481178A
CN105481178A CN201510996548.0A CN201510996548A CN105481178A CN 105481178 A CN105481178 A CN 105481178A CN 201510996548 A CN201510996548 A CN 201510996548A CN 105481178 A CN105481178 A CN 105481178A
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China
Prior art keywords
accelerator
treatment
membrane
slaked lime
reaction chamber
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CN201510996548.0A
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Chinese (zh)
Inventor
卓瑞锋
陈泽枝
陈新芳
林春明
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GARDEN ENVIRONMENTAL PROFECTION
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GARDEN ENVIRONMENTAL PROFECTION
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Priority to CN201510996548.0A priority Critical patent/CN105481178A/en
Publication of CN105481178A publication Critical patent/CN105481178A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5281Installations for water purification using chemical agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents

Abstract

The invention provides a landfill leachate treatment process with softening treatment. The landfill leachate treatment process sequentially comprises anaerobic treatment, membrane biochemical treatment, softening treatment, and membrane advanced treatment, wherein the softening treatment specifically comprises the following operations: putting the landfill leachate subjected to the membrane biochemical treatment and a softening agent which is added by a softening agent adding system into a mechanical stirring clarification tank together; adding a flocculating agent into the mechanical stirring clarification tank; filtering a separated clear liquid through an ultrafiltration system and then carrying out membrane advanced treatment on the filtered clear liquid; and refluxing an intercepted ultrafiltration concentrated liquid back into the mechanical stirring clarification tank to re-participate in reaction; putting separated water-containing sludge into a dehydrator; landfilling dehydrated sludge; and refluxing a generated dehydrated clear liquid back into the mechanical stirring clarification tank to re-participate in reaction, wherein the softening treatment can remove the hardness, COD and chroma of the landfill leachate after the membrane biochemical treatment very well to ensure that the membrane pollution of the subsequent membrane advanced treatment is reduced. Moreover, the membrane recovery rate is improved, and the membrane cleaning frequency is obviously reduced, so that the service life of a membrane is prolonged.

Description

A kind of garbage leachate treatment process of tool sofening treatment
[technical field]
The invention belongs to technical field of landfill leachate treatment, be specifically related to a kind of garbage leachate treatment process of tool sofening treatment.
[background technology]
Garbage incinerating power plant percolate results from the hole of the garbage storing before waste incineration, be mainly derived from the moisture and rubbish of rubbish self moisture that anaerobically fermenting produces in stacking process, its have colourity high, containing inorganic ions etc. such as high concentration organic contaminant, ammonia nitrogen and calcium magnesium.And rubbish from cooking is many in China's domestic waste, cause that its water ratio is high, calorific value is lower, for improving the stability of incineration firing, adopt extends rubbish in the time of storing up storage in hole more, the abundant drop of moisture in rubbish is gone out, reaches the object improving calorific value, therefore, the inorganic ion content such as the percolate of garbage burning factory is slant acidity, its calcium magnesium are high, its concentration and waste component and rubbish store up cheat in time of storing relevant.
At present, membrane bioreactor (MBR)+film advanced treatment is the garbage leachate treatment process generally adopted, namely the percolate after anaerobism enters in membrane bioreactor and carries out film biochemical treatment, after percolate after film biochemical treatment directly carry out film advanced treatment, finally discharge; Because wherein film advanced treatment is the technique of nanofiltration or reverse osmosis and combined films thereof, and still containing inorganic ions such as calcium magnesium in percolate after film biochemical treatment, thus easily form carbonate deposition, make easily to produce fouling membrane on film surface in film advanced treatment operational process, cause the loss of equipment and film serious, cause the rate of recovery of effluent quality and film advanced treatment to reduce.
In view of this, work out a kind of garbage leachate treatment process that can solve defect existing for above-mentioned film advanced treatment be those skilled in the art institute urgently desirably.
[summary of the invention]
Technical problem to be solved by this invention is the garbage leachate treatment process providing a kind of tool sofening treatment, very well the hardness of the percolate after film biochemical treatment, COD and colourity can be removed, make the water quality entering subsequent film advanced treatment can reduce the generation of fouling membrane to a great extent, and improve the film rate of recovery, cleaning frequency membrane is also able to obvious reduction, thus extends film work-ing life.
The present invention solves the problems of the technologies described above by the following technical programs: a kind of garbage leachate treatment process of tool sofening treatment, comprises anaerobism, film biochemical treatment, sofening treatment and film advanced treatment successively; The device that described sofening treatment adopts comprises softening adding of agent system, an accelerator, a water extracter and a ultrafiltration system, softening adding of agent system is connected with the first reaction chamber of accelerator, water extracter is connected respectively with the mud discharging mouth of accelerator, the second reaction chamber of accelerator, ultrafiltration system is connected respectively with the water outlet of accelerator, the second reaction chamber of accelerator, and is provided with the active sludge layer of a filtration in the settling section of described accelerator; The concrete operations of this sofening treatment are as follows:
Enter the first reaction chamber reaction of accelerator together with the tenderizer that percolate after film biochemical treatment and softening adding of agent system add, and add flocculation agent to the second reaction chamber of accelerator; Then through the reacted solution of the first reaction chamber of accelerator enter accelerator the second reaction chamber and with the flocculation agent generation flocculation reaction added, the solution after flocculation reaction carries out solid-liquid separation by the diversion chamber of mechanical clarifier; The mud of solid-liquid separation enters water extracter via the mud discharging mouth of accelerator and dewaters, the Sludge landfill after dehydration, and the second reaction chamber that the dehydration clear liquid of generation is back to accelerator participates in flocculation reaction again; The water of solid-liquid separation then enters the settling section of accelerator and filters through active sludge layer, after after active sludge layer filters the clear liquid that obtains enter ultrafiltration system by the water outlet of accelerator and filter, then enter follow-up film advanced treatment, and the second reaction chamber that the ultrafiltration dope that ultrafiltration system is retained down is back to accelerator participates in flocculation reaction again.
Further, described ultrafiltration system is built-in ultrafiltration membrane system or external placed type ultrafiltration membrane system, and the design membrane flux of built-in ultrafiltration membrane system is 12 ~ 17L/m 2h, the design membrane flux of external placed type ultrafiltration membrane system is 60 ~ 90L/m 2h.
Further, described tenderizer is at least one in slaked lime and sodium carbonate, sodium hydroxide; And when tenderizer be slaked lime and sodium carbonate time, the order of adding of the two is sodium carbonate after first slaked lime, and the dosage of slaked lime is 2 ‰ ~ 5 ‰, and the dosage of sodium carbonate is 0.5 ‰; When tenderizer be slaked lime and sodium hydroxide time, the order of adding of the two is sodium hydroxide after first slaked lime, and the dosage of slaked lime is 2 ‰ ~ 5 ‰, the dosage 0.5 ‰-1 ‰ of sodium hydroxide; When tenderizer is slaked lime, sodium hydroxide and sodium carbonate, the order of adding of three is sodium hydroxide sodium carbonate again after first slaked lime, and the dosage of slaked lime is 2 ‰ ~ 5 ‰, the dosage 0.5 ‰-1 ‰ of sodium hydroxide, and the dosage of sodium carbonate is 0.5 ‰; And the slaked lime in softening adding of agent system adds pipeline is provided with Butterworth Hatch.
Further, described flocculation agent is any one in cationic polyacrylamide, anionic polyacrylamide, non-ionic polyacrylamide, and the dosage of flocculation agent is 8 ~ 15ppm.
Further, the total residence time after the percolate after film biochemical treatment enters accelerator is 3-5h, and the water outlet pH of accelerator is 10 ~ 11.
Further, described water extracter is folded spiral shell formula sludge dewatering equipment or plate and frame water extracter.
Beneficial effect of the present invention is: by setting up a procedure and sofening treatment between film biochemical treatment and film advanced treatment, and coordinate the concrete operations of this sofening treatment, very well the hardness of the percolate after film biochemical treatment, COD and colourity can be removed, and clearance is all comparatively good, make the water quality entering subsequent film advanced treatment can reduce the generation of fouling membrane to a great extent, and improve the film rate of recovery, cleaning frequency membrane is also able to obvious reduction, thus extends film work-ing life.
[accompanying drawing explanation]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the process flow sheet of the garbage leachate treatment process of a kind of tool sofening treatment of the present invention.
Fig. 2 is the structural representation of accelerator in the present invention.
[embodiment]
Incorporated by reference to consulting Fig. 1 and Fig. 2, the garbage leachate treatment process of a kind of tool sofening treatment of the present invention, comprise anaerobism, film biochemical treatment, sofening treatment and film advanced treatment successively, namely the difference of itself and conventional garbage percolate treating process is to add sofening treatment.
The device that sofening treatment adopts comprises a softening adding of agent system 1, one accelerator 2, one water extracter 3 and a ultrafiltration system 4, softening adding of agent system 1 is connected with the first reaction chamber 21 of accelerator 2, the mud discharging mouth 22 of water extracter 3 and accelerator 2, second reaction chamber 23 of accelerator 2 connects respectively, the water outlet 24 of ultrafiltration system 4 and accelerator 2, second reaction chamber 23 of accelerator 2 connects respectively, and in the settling section 24 of described accelerator 2, be provided with the active sludge layer 25 of a filtration.
The concrete operations of this sofening treatment are as follows: the first reaction chamber 21 entering accelerator 2 together with the tenderizer that the percolate after film biochemical treatment and softening adding of agent system 1 add reacts, and adds flocculation agent to the second reaction chamber 23 of accelerator 2; Then through the reacted solution of the first reaction chamber 21 of accelerator 2 enter accelerator 2 the second reaction chamber 23 and with the flocculation agent generation flocculation reaction added, the solution after flocculation reaction carries out solid-liquid separation by the diversion chamber 26 of mechanical clarifier 2; The mud of solid-liquid separation enters water extracter 3 via the mud discharging mouth 22 of accelerator 2 and dewaters, the Sludge landfill after dehydration, and the second reaction chamber 23 that the dehydration clear liquid of generation is back to accelerator 2 participates in flocculation reaction again; The water of solid-liquid separation then enters the settling section 24 of accelerator 2 and filters through active sludge layer 25, after after active sludge layer 25 filters the clear liquid that obtains enter ultrafiltration system 4 by the water outlet 27 of accelerator 2 and filter, then enter follow-up film advanced treatment, and the second reaction chamber 23 that the ultrafiltration dope that ultrafiltration system 4 is retained down is back to accelerator 2 participates in flocculation reaction again.
Wherein, ultrafiltration system 4 is built-in ultrafiltration membrane system or external placed type ultrafiltration membrane system, and the design membrane flux of built-in ultrafiltration membrane system is 12 ~ 17L/m 2h, the design membrane flux of external placed type ultrafiltration membrane system is 60 ~ 90L/m 2h.In whole technique, the total residence time after the percolate after film biochemical treatment enters accelerator is 3-5h, and the water outlet pH of accelerator is 10 ~ 11.Tenderizer is at least one in slaked lime and sodium carbonate, sodium hydroxide; And when tenderizer be slaked lime and sodium carbonate time, the order of adding of the two is sodium carbonate after first slaked lime, the dosage of slaked lime is 2 ‰ ~ 5 ‰, the dosage of sodium carbonate is 0.5 ‰, when tenderizer be slaked lime and sodium hydroxide time, the order of adding of the two is sodium hydroxide after first slaked lime, and the dosage of slaked lime is 2 ‰ ~ 5 ‰, the dosage 0.5 ‰-1 ‰ of sodium hydroxide; When tenderizer is slaked lime, sodium hydroxide and sodium carbonate, the order of adding of three is sodium hydroxide sodium carbonate again after first slaked lime, and the dosage of slaked lime is 2 ‰ ~ 5 ‰, the dosage 0.5 ‰-1 ‰ of sodium hydroxide, and the dosage of sodium carbonate is 0.5 ‰; Be wherein controlled by the online pH meter of accelerator 2 water outlet at the concrete dosage of actually operating medium-slaking lime, make the water outlet pH value of accelerator 2 control at 10-11; And the slaked lime in softening adding of agent system adds pipeline is provided with Butterworth Hatch, so that detergent line prevents line clogging.Flocculation agent is any one in cationic polyacrylamide, anionic polyacrylamide, non-ionic polyacrylamide, and the dosage of flocculation agent is 8 ~ 15ppm.Water extracter selects folded spiral shell formula sludge dewatering equipment or plate and frame water extracter.
In order to set forth the practical application effect of the garbage leachate treatment process that a kind of tool sofening treatment of the present invention is described, applicant gives following specific embodiment.
Embodiment 1
Certain incineration plant percolate is successively through anaerobism, film biochemical treatment, sofening treatment and film advanced treatment, wherein the concrete operations of sofening treatment are: coagulating in the first reaction chamber 21 entering accelerator 2 together with the tenderizer that the percolate after film biochemical treatment and softening adding of agent system add, and adding cationic polyacrylamide to the second reaction chamber 23 of accelerator 2, dosage is 12ppm; Then through the reacted solution of the first reaction chamber 21 of accelerator 2 enter accelerator 2 the second reaction chamber 23 and with the cationic polyacrylamide generation flocculation reaction added, the solution after flocculation reaction carries out solid-liquid separation by the diversion chamber 26 of mechanical clarifier 2; The mud of solid-liquid separation enters plate and frame water extracter 3 via the mud discharging mouth 22 of accelerator 2 and dewaters, the Sludge landfill after dehydration, and the second reaction chamber 23 that the dehydration clear liquid of generation is back to accelerator 2 participates in flocculation reaction again; The water of solid-liquid separation then enters the settling section 24 of accelerator 2 and filters through active sludge layer 25, after after active sludge layer 25 filters the clear liquid that obtains enter ultrafiltration system 4 by the water outlet 27 of accelerator 2 and filter, then enter follow-up film advanced treatment, and the second reaction chamber 23 that the ultrafiltration dope that ultrafiltration system 4 is retained down is back to accelerator 2 participates in flocculation reaction again.The tenderizer that the present embodiment adopts is slaked lime and sodium carbonate, and namely add slaked lime, sodium carbonate successively, the dosage of slaked lime is 2 ‰, and the dosage of sodium carbonate is 0.5 ‰; Ultrafiltration system adopts external placed type ultrafiltration membrane system, and membrane flux is 75L/m 2h, the residence time of accelerator 2 is 3h.
After measured, the total hardness of water clearance that goes out after sofening treatment reaches more than 80%, the clearance of COD is more than 10%, chroma removal rate reaches 50%, the film rate of recovery of follow-up film advanced treatment is made to improve more than 10%, cleaning frequency membrane rises to 1 time/February by 1 time/month, and film extends work-ing life.
Embodiment 2
Certain incineration plant percolate is successively through anaerobism, film biochemical treatment, sofening treatment and film advanced treatment, wherein the concrete operations of sofening treatment are: coagulating in the first reaction chamber 21 entering accelerator 2 together with the tenderizer that the percolate after film biochemical treatment and softening adding of agent system add, and adding cationic polyacrylamide to the second reaction chamber 23 of accelerator 2, dosage is 10ppm; Then through the reacted solution of the first reaction chamber 21 of accelerator 2 enter accelerator 2 the second reaction chamber 23 and with the cationic polyacrylamide generation flocculation reaction added, the solution after flocculation reaction carries out solid-liquid separation by the diversion chamber 26 of mechanical clarifier 2; The mud of solid-liquid separation enters plate and frame water extracter 3 via the mud discharging mouth 22 of accelerator 2 and dewaters, the Sludge landfill after dehydration, and the second reaction chamber 23 that the dehydration clear liquid of generation is back to accelerator 2 participates in flocculation reaction again; The water of solid-liquid separation then enters the settling section 24 of accelerator 2 and filters through active sludge layer 25, after after active sludge layer 25 filters the clear liquid that obtains enter ultrafiltration system 4 by the water outlet 27 of accelerator 2 and filter, then enter follow-up film advanced treatment, and the second reaction chamber 23 that the ultrafiltration dope that ultrafiltration system 4 is retained down is back to accelerator 2 participates in flocculation reaction again.The tenderizer that the present embodiment adopts is slaked lime and sodium hydroxide, and namely add slaked lime, sodium hydroxide successively, the dosage of slaked lime is 3 ‰, and the dosage of sodium hydroxide is 0.6 ‰; Ultrafiltration system adopts built-in ultrafiltration membrane system, and membrane flux is 13L/m 2h, the residence time of accelerator 2 is 3h.
After measured, the total hardness of water clearance that goes out after sofening treatment reaches more than 80%, the clearance of COD is more than 10%, chroma removal rate reaches 50%, the film rate of recovery of follow-up film advanced treatment is made to improve more than 10%, cleaning frequency membrane rises to 1 time/month by 2 times/month, and film extends work-ing life.
Embodiment 3
Certain incineration plant percolate is successively through anaerobism, film biochemical treatment, sofening treatment and film advanced treatment, wherein the concrete operations of sofening treatment are: coagulating in the first reaction chamber 21 entering accelerator 2 together with the tenderizer that the percolate after film biochemical treatment and softening adding of agent system add, and adding cationic polyacrylamide to the second reaction chamber 23 of accelerator 2, dosage is 15ppm; Then through the reacted solution of the first reaction chamber 21 of accelerator 2 enter accelerator 2 the second reaction chamber 23 and with the cationic polyacrylamide generation flocculation reaction added, the solution after flocculation reaction carries out solid-liquid separation by the diversion chamber 26 of mechanical clarifier 2; The mud of solid-liquid separation enters plate and frame water extracter 3 via the mud discharging mouth 22 of accelerator 2 and dewaters, the Sludge landfill after dehydration, and the second reaction chamber 23 that the dehydration clear liquid of generation is back to accelerator 2 participates in flocculation reaction again; The water of solid-liquid separation then enters the settling section 24 of accelerator 2 and filters through active sludge layer 25, after after active sludge layer 25 filters the clear liquid that obtains enter ultrafiltration system 4 by the water outlet 27 of accelerator 2 and filter, then enter follow-up film advanced treatment, and the second reaction chamber 23 that the ultrafiltration dope that ultrafiltration system 4 is retained down is back to accelerator 2 participates in flocculation reaction again.The tenderizer that the present embodiment adopts is slaked lime, sodium hydroxide and sodium carbonate, i.e. sodium hydroxide sodium carbonate again after first slaked lime, and the dosage of slaked lime is 4 ‰, and the dosage of sodium hydroxide is 1 ‰; The dosage of sodium carbonate is 0.5 ‰; Ultrafiltration system adopts external placed type ultrafiltration membrane system, and membrane flux is 80L/m 2h, the residence time of accelerator 2 is 5h.
After measured, the total hardness of water clearance that goes out after sofening treatment reaches more than 90%, the clearance of COD is more than 10%, chroma removal rate reaches 50%, the film rate of recovery of follow-up film advanced treatment is made to improve more than 10%, cleaning frequency membrane rises to 1 time/February by 1 time/month, and film extends work-ing life.
The above, be only better case study on implementation of the present invention, not impose any restrictions the present invention, design concept of the present invention is not limited thereto, and all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.
In addition, it should be noted that, " ‰ " involved in the present invention is quality thousand mark.
To sum up, the present invention by setting up a procedure and sofening treatment between film biochemical treatment and film advanced treatment, and coordinate the concrete operations of this sofening treatment, very well the hardness of the percolate after film biochemical treatment, COD and colourity can be removed, and clearance is all comparatively good, makes the water quality entering subsequent film advanced treatment can reduce the generation of fouling membrane to a great extent, and improves the film rate of recovery, cleaning frequency membrane is also able to obvious reduction, thus extends film work-ing life.

Claims (6)

1. a garbage leachate treatment process for tool sofening treatment, comprises anaerobism, film biochemical treatment and film advanced treatment successively, it is characterized in that: also comprise sofening treatment between described film biochemical treatment and film advanced treatment; The device that described sofening treatment adopts comprises softening adding of agent system, an accelerator, a water extracter and a ultrafiltration system, softening adding of agent system is connected with the first reaction chamber of accelerator, water extracter is connected respectively with the mud discharging mouth of accelerator, the second reaction chamber of accelerator, ultrafiltration system is connected respectively with the water outlet of accelerator, the second reaction chamber of accelerator, and is provided with the active sludge layer of a filtration in the settling section of described accelerator; The concrete operations of this sofening treatment are as follows:
Enter the first reaction chamber reaction of accelerator together with the tenderizer that percolate after film biochemical treatment and softening adding of agent system add, and add flocculation agent to the second reaction chamber of accelerator; Then through the reacted solution of the first reaction chamber of accelerator enter accelerator the second reaction chamber and with the flocculation agent generation flocculation reaction added, the solution after flocculation reaction carries out solid-liquid separation by the diversion chamber of mechanical clarifier; The mud of solid-liquid separation enters water extracter via the mud discharging mouth of accelerator and dewaters, the Sludge landfill after dehydration, and the second reaction chamber that the dehydration clear liquid of generation is back to accelerator participates in flocculation reaction again; The water of solid-liquid separation then enters the settling section of accelerator and filters through active sludge layer, after after active sludge layer filters the clear liquid that obtains enter ultrafiltration system by the water outlet of accelerator and filter, then enter follow-up film advanced treatment, and the second reaction chamber that the ultrafiltration dope that ultrafiltration system is retained down is back to accelerator participates in flocculation reaction again.
2. the garbage leachate treatment process of a kind of tool sofening treatment according to claim 1, is characterized in that: described ultrafiltration system is built-in ultrafiltration membrane system or external placed type ultrafiltration membrane system, and the design membrane flux of built-in ultrafiltration membrane system is 12 ~ 17L/m 2h, the design membrane flux of external placed type ultrafiltration membrane system is 60 ~ 90L/m 2h.
3. the garbage leachate treatment process of a kind of tool sofening treatment according to claim 1, is characterized in that: described tenderizer is at least one in slaked lime and sodium carbonate, sodium hydroxide; And when tenderizer be slaked lime and sodium carbonate time, the order of adding of the two is sodium carbonate after first slaked lime, and the dosage of slaked lime is 2 ‰ ~ 5 ‰, and the dosage of sodium carbonate is 0.5 ‰; When tenderizer be slaked lime and sodium hydroxide time, the order of adding of the two is sodium hydroxide after first slaked lime, and the dosage of slaked lime is 2 ‰ ~ 5 ‰, the dosage 0.5 ‰-1 ‰ of sodium hydroxide; When tenderizer is slaked lime, sodium hydroxide and sodium carbonate, the order of adding of three is sodium hydroxide sodium carbonate again after first slaked lime, and the dosage of slaked lime is 2 ‰ ~ 5 ‰, the dosage 0.5 ‰-1 ‰ of sodium hydroxide, and the dosage of sodium carbonate is 0.5 ‰; And the slaked lime in softening adding of agent system adds pipeline is provided with Butterworth Hatch.
4. the garbage leachate treatment process of a kind of tool sofening treatment according to claim 1, it is characterized in that: described flocculation agent is any one in cationic polyacrylamide, anionic polyacrylamide, non-ionic polyacrylamide, and the dosage of flocculation agent is 8 ~ 15ppm.
5. the garbage leachate treatment process of a kind of tool sofening treatment according to claim 1, it is characterized in that: the total residence time after the percolate after film biochemical treatment enters accelerator is 3-5h, and the water outlet pH of accelerator is 10 ~ 11.
6. the garbage leachate treatment process of a kind of tool sofening treatment according to claim 1, is characterized in that: described water extracter is folded spiral shell formula sludge dewatering equipment or plate and frame water extracter.
CN201510996548.0A 2015-12-28 2015-12-28 Landfill leachate treatment process with softening treatment Pending CN105481178A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111732275A (en) * 2020-06-25 2020-10-02 长春黄金研究院有限公司 Advanced treatment method for high-hardness cyanide-containing wastewater
CN112218831A (en) * 2018-04-19 2021-01-12 凯米拉公司 Compositions and methods for pretreating landfill leachate in a mechanical vapor recompression evaporation process
CN113562883A (en) * 2021-08-23 2021-10-29 厦门嘉戎技术股份有限公司 Landfill leachate pretreatment process

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001070989A (en) * 1999-09-07 2001-03-21 Ebara Corp Method and apparatus for treating organic wastewater containing high concentration of salts
CN102557294A (en) * 2011-12-20 2012-07-11 嘉园环保股份有限公司 Sludge separating and filtering clarification tank and treatment process thereof
CN104418465A (en) * 2013-09-03 2015-03-18 上海御隆膜分离设备有限公司 Landfill leachate treatment method and equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001070989A (en) * 1999-09-07 2001-03-21 Ebara Corp Method and apparatus for treating organic wastewater containing high concentration of salts
CN102557294A (en) * 2011-12-20 2012-07-11 嘉园环保股份有限公司 Sludge separating and filtering clarification tank and treatment process thereof
CN104418465A (en) * 2013-09-03 2015-03-18 上海御隆膜分离设备有限公司 Landfill leachate treatment method and equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112218831A (en) * 2018-04-19 2021-01-12 凯米拉公司 Compositions and methods for pretreating landfill leachate in a mechanical vapor recompression evaporation process
CN111732275A (en) * 2020-06-25 2020-10-02 长春黄金研究院有限公司 Advanced treatment method for high-hardness cyanide-containing wastewater
CN113562883A (en) * 2021-08-23 2021-10-29 厦门嘉戎技术股份有限公司 Landfill leachate pretreatment process

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