CN1220637C - Technology for treating and controlling waterlogging in refuse bury field - Google Patents

Technology for treating and controlling waterlogging in refuse bury field Download PDF

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Publication number
CN1220637C
CN1220637C CNB021478716A CN02147871A CN1220637C CN 1220637 C CN1220637 C CN 1220637C CN B021478716 A CNB021478716 A CN B021478716A CN 02147871 A CN02147871 A CN 02147871A CN 1220637 C CN1220637 C CN 1220637C
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China
Prior art keywords
technology
refuse
treatment
treating
anaerobic treatment
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Expired - Fee Related
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CNB021478716A
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Chinese (zh)
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CN1418832A (en
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王宗平
裴华
陶涛
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Huazhong University of Science and Technology
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Huazhong University of Science and Technology
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    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

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  • Physical Water Treatments (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

The present invention discloses a technology for treating and controlling penetrated liquid in refuse landfills, which comprises the following steps: (1) adding FeCl3.6H2O with the concentration of 250 to 1000 mg/l into a coagulation tank; (2) treating via photochemical reaction under acid condition after coagulating sedimentation; (3) carrying out anaerobic treatment; (4) carrying out aerobic treatment. The photochemical reaction adopts a high-voltage mercury lamp as a lamp source, and the light application time is from 2 to 6 hours; dissolved oxygen during the anaerobic treatment is controlled below 0.2 mg/l, and the residence time is from 1.5 to 4 days. The technology has the advantages that the technology can solve the problem that the refuse penetrated liquid is difficult to treat, and can make refuse waste water reach the discharge standard; the coagulating agent and the photocatalyst are the same substance, and thus, the technology has convenient operation, low cost and less secondary pollution.

Description

A kind of method of administering waste landfill site leachate
Technical field
The invention belongs to the high-concentration waste water treatment technology, be specifically related to a kind of method of administering waste landfill site leachate.
Background technology
The treatment process of garbage leachate is more at present, mainly introduces three kinds below:
1. stripping pre-treatment+biological treatment.As described in " garbage leachate pre-treatment-ammonia stripping " and " blow-off method is removed city refuse landfill and oozed ammonia nitrogen in the drop liquid ", (king ancestor equality, June calendar year 2001 " water supply and drainage " VOL20, NO6, PP15-19; Wu Fang is equal, June calendar year 2001 " water supply and drainage " VOL20, NO6, PP20-24) pre-treatment of ammonia blow-off method easily causes secondary pollution-polluted air, and to COD load high to ooze drop liquid effect not good enough, be difficult to reach relevant emission standards (GB8978-1996 secondary standard).
2. light Fenton reaction+biological treatment, as described in " Landfill Leachate Treatmentby a Photoassiated Fenton Reaction " literary composition, (Kim Soo-M. etc., 1997, Wat.Sci.Tech., Vol.35, NO.4 PP239-248) this method adds H 2O 2Measure too big, the cost height, and the residue H 2O 2May have a negative impact to subsequent biological treatment.
3. Fenton reaction+biological treatment, as (2000.Wat.Res. such as Lin Sheng H. as described in " Treatment of LandfillLeachate Treatment by Combined Electro-Fenton Oxidation andSequencing Batch Reactor Method " one literary composition, Vol34, NO17, PP4242-4249) this method is similarly and adds H 2O 2Too much, cost height.
Summary of the invention
The object of the present invention is to provide a kind of method that can overcome the improvement waste landfill site leachate of above-mentioned defective, this method is simple to operate, less investment, operating cost is low, treatment effect good.
For achieving the above object, a kind of method of administering waste landfill site leachate may further comprise the steps successively:
(1) FeCl of adding 250-1000mg/l in coagulation basin 36H 2O;
(2) under acidic conditions, carrying out the photochemical reaction processing behind the coagulating sedimentation;
(3) carry out anaerobic treatment;
(4) carry out aerobic treatment.
High voltage mercury lamp is adopted in described photochemically reactive lamp source, and light application time is 2-6 hour; Dissolved oxygen is controlled at below the 0.2mg/l during described anaerobic treatment, and the residence time is 1.5-4 days.
The present invention carries out coagulating treatment earlier to garbage, waste-water, has made full use of coagulation to the high-concentration waste water good effectiveness, has adopted novel process---photochemical method, and coagulating agent and photocatalyst employing same substance, not only save cost but also make things convenient for management.The present invention combines the advantage of coagulation process and photochemical technology: coagulation is handled effectively high-concentration waste water, and photochemical method is to the low concentration wastewater better effects if; Waste water after photochemical through conventional biological treatment, combines photochemical and advantage biochemical treatment, the photochemical biodegradability that improves waste water again.Anaerobic filter and contact-oxidation pool all belong to high-efficiency bio-filter pool, effective, take up an area of little.After the inventive method was handled, water outlet can reach the secondary discharge standard of GB8978-1996.In a word, the first advantage of the present invention is to solve the difficult problem that garbage leachate is handled, and can make the garbage, waste-water qualified discharge; Second largest advantage is coagulating agent and photocatalyst same substance, have easy to operate, cost is low, the characteristics that secondary pollution is few.
Description of drawings
Accompanying drawing 1 is the inventive method schema.
Embodiment
Further describe the present invention below in conjunction with accompanying drawing and example.
The FeCl that in coagulation basin, adds 250-1000mg/l 36H 2O, behind the coagulating sedimentation, water outlet still is dissolved with Fe 3+, and itself contain Fe in some garbage leachate 3+Or other photocatalyst.Thereby next step photochemical reaction does not need to add in addition catalyzer.Photochemical reaction lamp source can be selected high voltage mercury lamp for use, and (UV-Vis, λ＞313nm), the high voltage mercury lamp spectral range is near sunlight, and the life-span of lamp is long, is suitable for practice and produces.Light application time is 2-6 hour, and photochemical reaction is carried out pH2-5 under acidic conditions comparatively suitable, regulates the pH value and adopts H 2SO 4Or HCl and NaOH or KOH.Biodegradability through waste water after the photochemical reaction improves, for subsequent biological treatment has been created condition.Aerobic after elder generation's anaerobism is that macromolecular complex is changed into small-molecule substance in the waste water because anaerobism can make, and further improves biodegradability, not only created favourable condition more for follow-up aerobic treatment, and anaerobe is also also removed most of organism.Anaerobism can be carried out at normal temperatures, and dissolved oxygen is controlled at below the 0.2mg/l, and the pH value is about 7, and the residence time is 1.5-4 days, and the aerobic time is 2-6 hour, and dissolved oxygen is controlled at more than the 2mg/l, and the pH value is about 7.Through after above several art breading, but the waste water qualified discharge.
Example 1:
Water inlet 20L, COD=3000mg/L, coagulant charging quantity 250mg/L.Light application time 4h, pH2.5, light source: 2 250W high voltage mercury lamps.3 days anaerobism time, pH7 carries out under the dissolved oxygen 0mg/l condition.Aerobic 4h, dissolved oxygen 2.5mg/l.Water outlet COD is as follows after each stage processing: 2800mg/L behind the coagulation, and 1350mg/L after the illumination, 670mg/L after the anaerobism, aerobic back 296mg/L is less than the emission standard of 300mg/L.
Example 2:
Water inlet 20L, COD=4200mg/L, coagulant charging quantity 500mg/L.Light application time 4h, pH3, light source: 2 250W high voltage mercury lamps.2 days anaerobism time, pH7 carries out under the dissolved oxygen 0mg/l condition.Aerobic 4h, dissolved oxygen 2.5mg/l.Water outlet COD is as follows after each stage processing: 3445mg/L behind the coagulation, and 1584mg/L after the illumination, 475mg/L after the anaerobism, aerobic back 220mg/L is less than the emission standard of 300mg/L.
Example 3:
Water inlet 50L, water inlet COD=6500mg/L.Coagulant charging quantity 750mg/L.Light application time 4h, pH3, light source: 2 250W high voltage mercury lamps.3 days anaerobism time, pH7 carries out under the dissolved oxygen 0.1mg/l condition.After each art breading, water outlet COD is as follows: 5130mg/L behind the coagulation, and 2240mg/L after the illumination, 650mg/L after the anaerobism, aerobic back 245mg/L is less than the emission standard of 300mg/L.
Example 4:
Water inlet 50L, water inlet COD=8000mg/L.Coagulant charging quantity 1000mg/L.Light application time 4h, pH3, light source: 2 250W high voltage mercury lamps.3 days anaerobism time, pH7 carries out under the dissolved oxygen 0.1mg/l condition.After each art breading, water outlet COD is as follows: 5200mg/L behind the coagulation, and 2340mg/L after the illumination, 660mg/L after the anaerobism, aerobic back 260mg/L is less than the emission standard of 300mg/L.

Claims (3)

1, a kind of method of administering waste landfill site leachate may further comprise the steps successively:
(1) FeCl of adding 250-1000mg/l in coagulation basin 36H 2O;
(2) under acidic conditions, carrying out the photochemical reaction processing behind the coagulating sedimentation;
(3) carry out anaerobic treatment;
(4) carry out aerobic treatment.
2, method according to claim 1 is characterized in that: high voltage mercury lamp is adopted in described photochemically reactive lamp source, and light application time is 2-6 hour.
3, method according to claim 1 and 2 is characterized in that: dissolved oxygen is controlled at below the 0.2mg/l during described anaerobic treatment, and the residence time is 1.5-4 days.
CNB021478716A 2002-12-16 2002-12-16 Technology for treating and controlling waterlogging in refuse bury field Expired - Fee Related CN1220637C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB021478716A CN1220637C (en) 2002-12-16 2002-12-16 Technology for treating and controlling waterlogging in refuse bury field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB021478716A CN1220637C (en) 2002-12-16 2002-12-16 Technology for treating and controlling waterlogging in refuse bury field

Publications (2)

Publication Number Publication Date
CN1418832A CN1418832A (en) 2003-05-21
CN1220637C true CN1220637C (en) 2005-09-28

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1325400C (en) * 2003-09-30 2007-07-11 深圳市宇力科技有限公司 House refuse percolate treating method
CN1329318C (en) * 2005-09-14 2007-08-01 北京天地人环保科技有限公司 Method for disposing refuse leachate of domestic refuse landfill
CN101209885B (en) * 2006-12-29 2011-02-02 中国市政工程华北设计研究院 Wastewater treatment method of garbage leachate
CN102503022B (en) * 2011-10-19 2014-12-10 常州浩瀚新材料科技有限公司 Method for synthesis treatment of landfill leachate

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