CN105541024A - Landfill leachatetreatment system - Google Patents

Landfill leachatetreatment system Download PDF

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Publication number
CN105541024A
CN105541024A CN201511025001.2A CN201511025001A CN105541024A CN 105541024 A CN105541024 A CN 105541024A CN 201511025001 A CN201511025001 A CN 201511025001A CN 105541024 A CN105541024 A CN 105541024A
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water
pipeline
water outlet
water inlet
equalizing tank
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CN201511025001.2A
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CN105541024B (en
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薛晓霞
周玉
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Beijing Original Environment Investment Management Co Ltd
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Beijing Original Environment Investment Management Co Ltd
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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
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • 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
    • C02F1/50Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • 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
    • C02F3/02Aerobic processes
    • 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
    • C02F3/02Aerobic processes
    • C02F3/12Activated sludge processes
    • C02F3/1236Particular type of activated sludge installations
    • C02F3/1268Membrane bioreactor systems
    • 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
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/28Anaerobic digestion processes
    • C02F3/2846Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E50/00Technologies for the production of fuel of non-fossil origin
    • Y02E50/30Fuel from waste, e.g. synthetic alcohol or diesel

Abstract

The invention discloses a landfill leachate treatment system, comprising a water collecting tank, an adjusting tank, a hydrolytic acidification tank, a UASB (Upflow Anaerobic Sludge Blanket) reactor, a membrane bioreactor, an anoxic tank, an aerobic tank, disc-tube reverse osmosismembrane equipment and a disinfectant fluid tank, which are connected with one another in sequence. The landfill leachate treatment system disclosed by the invention is simple in sewage treatment flow, is convenient to operate, greatly reduces the output of sludge, and reduces the operating cost of sewage treatment.

Description

A kind of garbage percolation liquid treating system
Technical field
The present invention relates to field of waste water treatment, particularly a kind of garbage percolation liquid treating system.
Background technology
Percolate has the features such as pollution concentration is high, complicated component, change extremely unstable, and its principal feature is as follows:
1, variation water quality is large, and leachate quality changes greatly in time, leachate quality be variation factor, daily variation factor generally up to 200% and 300%, and the water quality of aged landfill yard is time dependent relatively large.Leachate quality is large at different landfill time period difference.Usual initial landfill stage percolate is black, good biodegradability, is easy to process; And along with the prolongation of landfill time, percolate is gradually in brown, biodegradability is deteriorated, and ammonia nitrogen concentration obviously increases, more and more difficult.Therefore any one refuse landfill, the selection of its garbage leachate treatment process not only will meet water quality characteristic and the processing requirements of recent percolate, also will take into account and adapt to the leachate quality feature after running life change.
2, biodegradability (biodegradability) with landfill age increase and reduce gradually; Containing a large amount of organic pollutants in percolate, along with the time lengthening of landfill, voltaile fatty acid reduces gradually, and the proportion of two fulvinic acid class materials increases.The change of this organic constituents, means the decline of B/C, i.e. the reduction of the biodegradability of percolate.BOD5 in percolate generally progressively increases between 6 months to about 2 years years and peaks after garbage loading embeading, and the BOD5 in this stage is main mainly with dissolved organic matter.
3, nutritive element proportional imbalance: the ammonia nitrogen concentration in percolate is high, and phosphoric lacks.
The water quality of percolate is quite complicated, general containing high-enriched organics, heavy metallic salt, SS and ammonia nitrogen, percolate is contaminated soil and earth surface water source not only, also can pollute underground water, generally Biochemical method is adopted for percolate, but treatment effect is not very desirable, and running cost is relatively high.
Summary of the invention
The object of this invention is to provide a kind of system adopting anaerobism-Membrane Bioreactor for Wastewater Treatment percolate, its structure is simple, achieves the qualified discharge of percolate, reduces costs, energy-conservation environmental protection again.
Technical scheme provided by the invention is as follows:
A kind of garbage percolation liquid treating system, comprises water collecting basin, equalizing tank, hydrolysis acidification pool, UASB reactor, membrane bioreactor, anoxic pond, Aerobic Pond, disc tube reverse osmosis (dt-ro) film device and disinfection pool, the water outlet of water collecting basin is connected to the water inlet of equalizing tank by water pump and pipeline, the water outlet of equalizing tank is connected to the water inlet of hydrolysis acidification pool by water pump and pipeline, the water outlet of hydrolysis acidification pool is connected to the water inlet of UASB reactor by water pump and pipeline, the water outlet of UASB reactor is connected to the water inlet of membrane bioreactor by pipeline, the water outlet of membrane bioreactor is connected to the water inlet of anoxic pond by pipeline, the water outlet of anoxic pond is connected to the water inlet of Aerobic Pond by pipeline, the water outlet of Aerobic Pond is connected to the water inlet of disc tube reverse osmosis (dt-ro) film device by water pump and pipeline, the water outlet of disc tube reverse osmosis (dt-ro) film device is connected to the water inlet of disinfection pool by pipeline.
Preferably, grid is provided with before the water inlet of water collecting basin.
Preferably, also comprise sludge thickener and sludge dehydration device, the water outlet of hydrolysis acidification pool, UASB reactor and Aerobic Pond is connected to the water inlet of sludge thickener by pipeline, the water outlet of sludge thickener is connected to equalizing tank and sludge dehydration device respectively by pipeline.
Preferably, also comprise methane pretreatment apparatus and biogas storage cabinet, the venting port of UASB reactor is connected to the air intake of methane pretreatment apparatus by pipeline, and the air outlet of methane pretreatment apparatus is connected to the air intake of biogas storage cabinet by pipeline.
Preferably, the water outlet of described Aerobic Pond is also connected to the water inlet of anoxic pond and the water inlet of membrane bioreactor respectively by pipeline.
Preferably, the water outlet of described membrane bioreactor is also connected to the water inlet of UASB reactor by pipeline.
Preferably, described water pump is variable frequency pump.
Present invention also offers the method utilizing said system to process percolate, comprise the steps:
Percolate pumps into water collecting basin after collecting, and establishes fine fack at water collecting basin feed-water end, removes large granular impurity;
Pumped into equalizing tank by percolate after process, in equalizing tank, obtain homogeneous all measure, adopt boring aeration pipe to stir in equalizing tank, prevent sludge settling;
Equalizing tank establishes one-level lift pump to be processed to hydrolysis acidification pool by sewage lifting;
Sewage after process promotes through charging pump and enters UASB reactor, after removing most of organism, enter MBR system, MBR system major control index comprises: water inlet C:N:P=(350-500): 5:1, temperature controls at 30-35 DEG C, and pH value controls at 7-7.2;
MBR system water outlet enters anoxic pond, Aerobic Pond and disc tube reverse osmosis (dt-ro) film device successively and processes, and wherein in anaerobic treatment process, oxygen concn is 0.1-0.13mg/L, and in Aerobic, oxygen concn is 0.15-0.18mg/L; The water reaching reuse standard through the process of disc tube reverse osmosis (dt-ro) film device enters sterilization pool sterilization, then discharges, and the dope that disc tube reverse osmosis (dt-ro) film device is retained recharges or return spray process.
Further, hydrolysis acidification pool, UASB reactor, Aerobic Pond produce excess sludge enter sludge condensation he, the moisture content of the cake after thickening process is less than 50%, then deliver to outward transport or landfill; The supernatant liquor that sludge thickener produces is back to equalizing tank and carries out circular treatment.
Further, the water outlet of Aerobic Pond also sends mixed solution back to anoxic pond by reflux line and MBR system does circular treatment, and the water outlet of MBR system is also sent mixed solution back to UASB reactor by reflux line and done circular treatment.
Garbage percolation liquid treating system provided by the invention, has following beneficial effect:
1, this system adopts acidication technique, UASB reaction, MBR process successively to percolate process, belongs to a kind of anaerobic treatment mode, effectively reduces the energy consumption of native system.
2, this system has higher COD degradation efficiency, anaerobic part COD clearance high (85%-92%), the high [2.3-19.8kg/ (m of COD rate of load condensate 3d)], mud age long (SRT>200d), sludge output is few, the water conservancy residence time short (HRT is 8-12h).
3, the water inlet of this system is to TSS, fat, oil, grease strong adaptability, and biomass separation energy consumes low, does not need to add coagulating agent and flocculation agent.Stable effluent quality, various index all reaches " household refuse landfill sites Environmental capacity standard " GB16889-2008 Sewage Water Emissions concentration limit, can meet irrigation water demand.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of garbage percolation liquid treating system provided by the present invention.
Embodiment
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 1, a kind of garbage percolation liquid treating system provided by the invention, comprise water collecting basin, equalizing tank, hydrolysis acidification pool, UASB reactor, membrane bioreactor, anoxic pond, Aerobic Pond, disc tube reverse osmosis (dt-ro) film device and disinfection pool.The garbage leachate that refuse tip produces pumps into grid water collecting basin after collecting, and establishes fine fack at water collecting basin feed-water end, removes large granular impurity, prevents occluding device and affect wastewater treatment efficiency.Then percolate pumps into equalizing tank, obtains homogeneous and all measure in equalizing tank.Adopt boring aeration pipe to stir in pond, prevent sludge settling.Equalizing tank establishes one-level lift pump to be processed to hydrolysis acidification pool by sewage lifting, and the macromole open loop chain rupture in sewage can be become small molecules by hydrolysis acidification pool, improves the biodegradability of sewage, to utilize microorganism to process, and can reduce sludge yield.
Hydrolysis acidification pool water outlet can enter a dosing chamber (not shown), can carry out the adjustment of nutraceutical dosing, water temperature and pH in dosing chamber, after reaching the final condition that anaerobe requires, promotes enter UASB reactor through charging pump.Sewage, after UASB reactor removes most of organism, enters MBR system, and MBR system major control index comprises: water inlet C:N:P=(350-500): 5:1, temperature controls at 30-35 DEG C, and pH value controls at 7-7.2.MBR system water outlet enters anoxic pond and Aerobic Pond (i.e. A/O pond) does further process.A/O pond fully realizes the function of organics removal and denitrogenation.The water outlet of A/O pond enters disc tube reverse osmosis (dt-ro) film device (i.e. DTRO equipment), enters sterilization pool sterilization, then discharge after the process of DTRO equipment reaches reuse standard.And DTRO dope can recharge or return spray.
Hydrolysis acidification pool, UASB reactor, A/O pond produce excess sludge enter sludge condensation he, the moisture content of the cake after thickening process can reach below 60%-70%, then deliver to outward transport or landfill.Sludge thickener supernatant liquor is back to equalizing tank.
The biogas produced in UASB reactor has good economic worth, and carry out sending into biogas storage cabinet after gas-liquid separation and desulfurization through methane pretreatment apparatus and recycled, unnecessary biogas incendivity emits.
As further improvement, the water outlet of Aerobic Pond also sends mixed solution back to anoxic pond by reflux line and MBR system does circular treatment, the water outlet of MBR system is also sent mixed solution back to UASB reactor by reflux line and is done circular treatment, ensures that sewage fully carries out purifying treatment.
Water body after DTRO device processes is sent in disinfection pool and is sterilized, and namely complete the process to percolate after water outlet, whole flow process is convenient and swift, economical environment-protective.
Through reality test, the stable effluent quality of native system, various index all reaches " household refuse landfill sites Environmental capacity standard " GB16889-2008 Sewage Water Emissions concentration limit.
Above a kind of garbage percolation liquid treating system provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands core concept of the present invention for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.

Claims (10)

1. a garbage percolation liquid treating system, is characterized in that, comprises water collecting basin, equalizing tank, hydrolysis acidification pool, UASB reactor, membrane bioreactor, anoxic pond, Aerobic Pond, disc tube reverse osmosis (dt-ro) film device and disinfection pool, the water outlet of water collecting basin is connected to the water inlet of equalizing tank by water pump and pipeline, the water outlet of equalizing tank is connected to the water inlet of hydrolysis acidification pool by water pump and pipeline, the water outlet of hydrolysis acidification pool is connected to the water inlet of UASB reactor by water pump and pipeline, the water outlet of UASB reactor is connected to the water inlet of membrane bioreactor by pipeline, the water outlet of membrane bioreactor is connected to the water inlet of anoxic pond by pipeline, the water outlet of anoxic pond is connected to the water inlet of Aerobic Pond by pipeline, the water outlet of Aerobic Pond is connected to the water inlet of disc tube reverse osmosis (dt-ro) film device by water pump and pipeline, the water outlet of disc tube reverse osmosis (dt-ro) film device is connected to the water inlet of disinfection pool by pipeline.
2. garbage percolation liquid treating system according to claim 1, is characterized in that, is provided with grid before the water inlet of water collecting basin.
3. garbage percolation liquid treating system according to claim 1, it is characterized in that, also comprise sludge thickener and sludge dehydration device, the water outlet of hydrolysis acidification pool, UASB reactor and Aerobic Pond is connected to the water inlet of sludge thickener by pipeline, the water outlet of sludge thickener is connected to equalizing tank and sludge dehydration device respectively by pipeline.
4. garbage percolation liquid treating system according to claim 1, it is characterized in that, also comprise methane pretreatment apparatus and biogas storage cabinet, the venting port of UASB reactor is connected to the air intake of methane pretreatment apparatus by pipeline, the air outlet of methane pretreatment apparatus is connected to the air intake of biogas storage cabinet by pipeline.
5. garbage percolation liquid treating system according to claim 1, is characterized in that, the water outlet of described Aerobic Pond is also connected to the water inlet of anoxic pond and the water inlet of membrane bioreactor respectively by pipeline.
6. garbage percolation liquid treating system according to claim 1, is characterized in that, the water outlet of described membrane bioreactor is also connected to the water inlet of UASB reactor by pipeline.
7. the garbage percolation liquid treating system according to any one of claim 1-6, is characterized in that, described water pump is variable frequency pump.
8. utilize the garbage percolation liquid treating system described in claim 1 to carry out a method for landfill leachate treatment, it is characterized in that, comprise the steps:
Percolate pumps into water collecting basin after collecting, and establishes fine fack at water collecting basin feed-water end, removes large granular impurity;
Percolate after process is pumped to equalizing tank, obtains homogeneous and all measure in equalizing tank, adopts boring aeration pipe to stir, prevent sludge settling in equalizing tank;
Equalizing tank establishes one-level lift pump to be processed to hydrolysis acidification pool by sewage lifting;
After process, sewage promotes through charging pump and enters UASB reactor, after removing most of organism, enter MBR system, MBR system major control index comprises: water inlet C:N:P=(350-500): 5:1, temperature controls at 30-35 DEG C, and pH value controls at 7-7.2;
MBR system water outlet enters anoxic pond, Aerobic Pond and disc tube reverse osmosis (dt-ro) film device successively and processes, and wherein in anaerobic treatment process, oxygen concn is 0.1-0.13mg/L, and in Aerobic, oxygen concn is 0.15-0.18mg/L; The water reaching reuse standard through the process of disc tube reverse osmosis (dt-ro) film device enters sterilization pool sterilization, then discharges, and the dope that disc tube reverse osmosis (dt-ro) film device is retained recharges or return spray process.
9. method as claimed in claim 8, is characterized in that, the excess sludge that hydrolysis acidification pool, UASB reactor, Aerobic Pond produce enter sludge condensation he, the moisture content of the cake after thickening process is less than 50%, then delivers to outward transport or landfill; The supernatant liquor that sludge thickener produces is back to equalizing tank and carries out circular treatment.
10. method as claimed in claim 8, it is characterized in that, the water outlet of Aerobic Pond also sends mixed solution back to anoxic pond by reflux line and MBR system does circular treatment, and the water outlet of MBR system is also sent mixed solution back to UASB reactor by reflux line and done circular treatment.
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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010065008A (en) * 1999-12-20 2001-07-11 홍상복 A treatment method of leachates discharged from landfill by using reverse osmosis system and evaporation method
CN2832807Y (en) * 2005-09-14 2006-11-01 北京天地人环保科技有限公司 Device for treating garbage leachate in domestic garbage burning factory
CN101219845A (en) * 2008-01-28 2008-07-16 北京洁绿科技发展有限公司 Technique for processing garbage leachate
CN101870543A (en) * 2010-07-14 2010-10-27 柳州森淼环保技术开发有限公司 Landfill percolate treatment novel process
CN201809252U (en) * 2010-07-22 2011-04-27 北京水气蓝德环保科技有限公司 High-concentration refractory organic wastewater two-phase anaerobic membrane biological treatment pool
CN102826726A (en) * 2012-09-25 2012-12-19 重庆三峰环境产业集团有限公司 Refuse incineration plant leachate treatment process
CN102976566A (en) * 2012-12-24 2013-03-20 北京桑德环境工程有限公司 System and method for treating high-concentration landfill leachate in aerobic composting site
CN202953907U (en) * 2012-11-28 2013-05-29 贵州深海环保工程有限公司 Landfill leachate treatment device
CN103708675A (en) * 2013-12-13 2014-04-09 广东省环境科学研究院 Landfill leachate treatment method based on high-frequency vibration membrane
CN203653393U (en) * 2014-01-01 2014-06-18 浙江四通环境工程有限公司 Landfill leachate treatment device
CN204058193U (en) * 2014-08-28 2014-12-31 中国电建集团中南勘测设计研究院有限公司 A kind of garbage percolation liquid treating system

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010065008A (en) * 1999-12-20 2001-07-11 홍상복 A treatment method of leachates discharged from landfill by using reverse osmosis system and evaporation method
CN2832807Y (en) * 2005-09-14 2006-11-01 北京天地人环保科技有限公司 Device for treating garbage leachate in domestic garbage burning factory
CN101219845A (en) * 2008-01-28 2008-07-16 北京洁绿科技发展有限公司 Technique for processing garbage leachate
CN101870543A (en) * 2010-07-14 2010-10-27 柳州森淼环保技术开发有限公司 Landfill percolate treatment novel process
CN201809252U (en) * 2010-07-22 2011-04-27 北京水气蓝德环保科技有限公司 High-concentration refractory organic wastewater two-phase anaerobic membrane biological treatment pool
CN102826726A (en) * 2012-09-25 2012-12-19 重庆三峰环境产业集团有限公司 Refuse incineration plant leachate treatment process
CN202953907U (en) * 2012-11-28 2013-05-29 贵州深海环保工程有限公司 Landfill leachate treatment device
CN102976566A (en) * 2012-12-24 2013-03-20 北京桑德环境工程有限公司 System and method for treating high-concentration landfill leachate in aerobic composting site
CN103708675A (en) * 2013-12-13 2014-04-09 广东省环境科学研究院 Landfill leachate treatment method based on high-frequency vibration membrane
CN203653393U (en) * 2014-01-01 2014-06-18 浙江四通环境工程有限公司 Landfill leachate treatment device
CN204058193U (en) * 2014-08-28 2014-12-31 中国电建集团中南勘测设计研究院有限公司 A kind of garbage percolation liquid treating system

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