CN103880253B - Garbage leachate advanced treatment method and Fenton reaction tower - Google Patents

Garbage leachate advanced treatment method and Fenton reaction tower Download PDF

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CN103880253B
CN103880253B CN201410137029.4A CN201410137029A CN103880253B CN 103880253 B CN103880253 B CN 103880253B CN 201410137029 A CN201410137029 A CN 201410137029A CN 103880253 B CN103880253 B CN 103880253B
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fenton
water
water outlet
reaction tower
percolate
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CN201410137029.4A
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CN103880253A (en
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曾胜学
申司浩
王侃
朱红斌
金鑫
龙纯
章秋来
吕一展
陈雁雄
蔡得华
张立奎
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深圳市百斯特环保工程有限公司
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Abstract

The invention discloses a garbage leachate advanced treatment method and a Fenton reaction tower. The advanced treatment method comprises the following steps: (1) treating garbage leachate in a membrane bioreactor; (2) sending effluent water treated by the step (1) into a Fenton reaction tower, and carrying out advanced oxidation treatment; (3) sending the effluent water treated by the step (2) into a precipitation tank; (4) sending the effluent water treated by the step (3) into an anaerobic aeration biofilter; and (5) sending the effluent water treated by the step (4) into an aerobic aeration biofilter, and discharging the effluent water after reaching the standard. The method is simple to operate and low in operating cost, does not generate any concentrated solution, can implement energy saving and emission reduction in deed.

Description

A kind of deep treatment method of percolate and Fenton's reaction tower

Technical field

The present invention relates to water treatment field, particularly relate to a kind of deep treatment method and Fenton's reaction tower of percolate.

Background technology

At present, the advanced treatment of percolate is mainly based on membrane filtration, by using the filter membrane of different pore size to reach different specification requirement, but the process of membrane filtration belongs to physical process, just pollutent is transferred in concentrated solution, can not removal pollutent truly, the concentrated solution that membrane processing method produces is the secondary pollution source that a kind of intractability is very large, the process of concentrated solution does not also have good method till now, and film belongs to Nonrenewable resources, must more renew as damaged, cannot recycle, cause the waste of resource, running cost is high.

Summary of the invention

Technical problem to be solved by this invention is: make up above-mentioned the deficiencies in the prior art, propose a kind of deep treatment method and Fenton's reaction tower of percolate, it is simple to operate, and running cost is low, and do not produce concentrated solution, truly can accomplish energy-saving and emission-reduction.

Technical problem of the present invention is solved by following technical scheme:

A deep treatment method for percolate, comprises the steps:

(1) percolate is entered Membrane Bioreactor for Wastewater Treatment;

(2) enter Fenton's reaction tower after regulating pH to be 2-3 the water outlet after step (1) process and carry out advanced oxidation process, the oxygenant of described advanced oxidation process is Fenton reagent, and described Fenton reagent is H 2o 2and FeSO 4mixture, add 4-6kg H according to the water entering Fenton's reaction tower per ton 2o 2and 2-2.6kgFeSO 4enter the water of Fenton's reaction tower in the shape of a spiral, the time of described advanced oxidation process is 6-8 hour, in treating processes, again pass back into described Fenton's reaction tower after part water in described Fenton's reaction tower is drawn out of, the water entering Fenton's reaction tower is 1:4 ~ 1:5 with the ratio of the flow of the water passing back into Fenton's reaction tower;

(3) water outlet after step (2) process is entered settling tank, adjustment pH is 9-10, and adds the PAM(polyacrylamide of 0.002-0.003kg by the water entering settling tank per ton, Polyacrylamide) precipitate, sedimentation time is 12-14 hour;

(4) water outlet after step (3) process is entered anaerobism BAF, the carbon source of 2-3kg is added by the water entering anaerobism BAF per ton, in anaerobism BAF, sludge concentration is 6000-8000mg/L, dissolved oxygen concentration is 0.3-0.5mg/L, and the residence time is 4-5 hour;

(5) water outlet after step (4) process is entered aerobic aeration biological filter, in aerobic aeration biological filter, sludge concentration is 8000-12000mg/L, dissolved oxygen concentration 2-3mg/L, and after residence time 10-12 hour, qualified discharge is carried out in water outlet.

The deep treatment method of above technical scheme is by advanced oxidation (AOP, advanced oxidationprocesses) as pre-treatment, by Fenton reagent, the organism of difficult degradation in percolate is converted into the organism of readily biodegradable, improve the biodegradability of waste water, by follow-up precipitation, throw out is removed again, then sequentially enter anaerobism BAF to be hydrolyzed acidifying, then enter after aerobic aeration biological filter carries out the further removal of pollutent, the object of organics removal and removal of ammonia and nitrogen and total nitrogen can be reached, effective guarantee standard water discharge discharge, SS(solid suspension substrate concentration, Suspended solid) very low, be no more than 20mg/L, water outlet reaches sewage drainage standard in city life garbage landfill pollutant catabolic gene (GB16889-2008) and discharges.

Preferably, the COD(chemical oxygen demand (COD) of the water outlet after step (1) process)≤1000mg/L, NH 3-N(ammonia nitrogen)≤100mg/L, TN(total nitrogen)≤200mg/L.

Preferably, the COD≤300mg/L of the water outlet after step (2) process, NH 3-N≤40mg/L, TN≤160mg/L.

Preferably, the COD≤270mg/L of the water outlet after step (3) process, NH 3-N≤36mg/L, TN≤150mg/L.

Preferably, the COD≤180mg/L of the water outlet after step (4) process, NH 3-N≤27mg/L, TN≤80mg/L.

Preferably, the COD≤75mg/L of the water outlet after step (5) process, NH 3-N≤6mg/L, TN≤20mg/L.

Preferably, the carbon source in described step (4) is methyl alcohol.

A kind of Fenton's reaction tower for described deep treatment method, comprise tower body, described tower body is cylinder shape, adopt enamel material, water-in is provided with at the close bottom position of described tower body, mud discharging mouth and backflow water-in, recycling effluent mouth is provided with at the medium position of described tower body, overflow weir is provided with at the close tip position of described tower body, the water inlet pipe be connected with described water-in is provided with in the inside of described tower body, described water inlet pipe comprises house steward and arm, described house steward is connected with described water-in, described house steward is annular, described arm has 3-5 and is distributed in that described house steward is upper to be communicated with described house steward, the angle of the tangential direction of described arm and described annular is 40-60 °, described arm is to the water outlet in the shape of a spiral of the top towards described tower body, described recycling effluent mouth is connected by pipeline with backflow water-in, also recycle pump is provided with in the position near backflow water-in.

The percolate be through after Membrane Bioreactor for Wastewater Treatment of Fenton's reaction tower process, the height being exclusively used in its tower body of Fenton's reaction tower of the present invention in technique scheme is greater than tower diameter, above structure makes to enter the water of Fenton's reaction tower in the shape of a spiral, Fenton reagent is from recycle pump charging, abundant reaction can be uniformly mixed with spiral helicine water inlet, be convenient to follow-up further process.

Preferably, the rational height of described recycling effluent mouth is 0.5-0.6 with the ratio of the height of described tower body.

Preferably, the little 200-250mm of radius of tower body described in the radius ratio of described annular.

Preferably, the angle of the tangential direction of described arm and described annular is 45 °.

Preferably, described overflow weir is zig-zag.

Preferably, the distance at the top of described overflow weir and the top of described tower body is 300-400mm.

Preferably, described arm is uniformly distributed on described house steward.

Preferably, described mud discharging mouth is lower than described water-in, and described backflow water-in flushes with described water-in or higher than described water-in.

The present invention also tool has the following advantages:

(1) floor space is little, and initial cost is economized.BAF is a kind of bio-reactor efficiently, collection biological degradation, filter, the good characteristics such as absorption are in one, BAF is built with ceramic grain filter, second pond is not established after BAF, occupation of land and the investment of settling tank can be saved, in addition, because the particle diameter of filter medium adopted is less, specific surface is large, biomass is high, add back flushing and effectively can upgrade microbial film, keep biomembranous high reactivity, so just can carry out fast purification to sewage at short notice, hydraulic load and the volumetric loading of BAF are much higher than traditional waste water treatment process, the residence time is short, therefore required biological treatment area and volume all very little, save and taken up an area and investment.

(2) working cost is low.BAF coefficient of oxygen utilization is higher than general activated sludge process, can reach 20%-30%, and require that gas-water ratio is low, be generally 2:1-5:1, saves tolerance more than 50%, so working cost is less than the half of activated sludge process.

(3) effluent quality is good.In the art, because filler itself retains and the biological flocculation of surface biological film, make water outlet SS very low, be generally no more than 20mg/L; Because of periodic back flushing, microbial film is able to effective renewal, and show as microbial film thinner (being generally 110 μm), activity is very high.The material that highly active microbial film is adsorbable, retain some difficult degradations, and play the object of certain denitrogenation dephosphorizing.

(4) operational reliability is high, easy to be filmed, starts fast.BAF has stronger capacity of resisting impact load, and without sludge bulking problem, for some time is not run (several days or some months), and microorganism can not be run off, and can recover in the short period of time.

Accompanying drawing explanation

Fig. 1 is the schematic flow sheet of the deep treatment method of percolate in the embodiment of the present invention;

Fig. 2 is the schematic diagram of the Fenton's reaction tower in the embodiment of the present invention;

Fig. 3 is the cross-sectional schematic of the Fenton's reaction tower in Fig. 2 along A-A '.

Embodiment

Below contrast accompanying drawing and combine preferred embodiment the invention will be further described.

The invention provides a kind of deep treatment method of percolate, in one embodiment, as shown in Figure 1, comprise the steps:

(1) percolate is entered Membrane Bioreactor for Wastewater Treatment, the COD≤1000mg/L of the water outlet after step (1) process, NH 3-N≤100mg/L, TN≤200mg/L.

(2) enter Fenton's reaction tower after being 2-3 by the water outlet sulphur acid for adjusting pH after step (1) process and carry out advanced oxidation process, the oxygenant of described advanced oxidation process is Fenton reagent, and described Fenton reagent is H 2o 2and FeSO 4mixture, add 5kg H according to the water entering Fenton's reaction tower per ton 2o 2and 2.6kgFeSO 4enter the water of Fenton's reaction tower in the shape of a spiral, the time of described advanced oxidation process is 6 hours, in treating processes, again pass back into described Fenton's reaction tower after part water in described Fenton's reaction tower is drawn out of, the water entering Fenton's reaction tower is 1:4 with the ratio of the flow of the water passing back into Fenton's reaction tower; COD≤the 300mg/L of the water outlet after step (2) process, NH 3-N≤40mg/L, TN≤160mg/L.

(3) water outlet after step (2) process is entered settling tank, regulates pH to be 9-10 with NaOH, and add the PAM(polyacrylamide of 0.002kg by the water entering settling tank per ton, Polyacrylamide) precipitate, sedimentation time is 12 hours; COD≤the 270mg/L of the water outlet after step (3) process, NH 3-N≤36mg/L, TN≤150mg/L.

(4) water outlet after step (3) process is entered anaerobism BAF, the methyl alcohol of 2kg is added by the water entering anaerobism BAF per ton, in anaerobism BAF, sludge concentration is 6000mg/L, and dissolved oxygen concentration is 0.3mg/L, and the residence time is 4 hours; Larger molecular organics hydrolysis is mainly become small organic molecule by anaerobism BAF, and adding methyl alcohol for microorganism provides nutrition, and can ensure suitable carbon-nitrogen ratio as carbon source, 4) COD≤180mg/L of water outlet after process, NH 3-N≤27mg/L, TN≤80mg/L.

(5) water outlet after step (4) process is entered aerobic aeration biological filter, in aerobic aeration biological filter, sludge concentration is 8000mg/L, dissolved oxygen concentration 2mg/L, water outlet after 10 hours residence time, enters clean water basin and carries out qualified discharge.Water outlet after step (5) process can reach sewage drainage standard in city life garbage landfill pollutant catabolic gene (GB16889-2008), its COD≤75mg/L, NH 3-N≤6mg/L, TN≤20mg/L.

The present invention also provides a kind of Fenton's reaction tower for described deep treatment method, as Figure 2-3, comprise tower body 1, described tower body 1 is cylinder shape, adopt enamel material, water-in 2 is provided with at the close bottom position of described tower body 1, mud discharging mouth 3 and backflow water-in 4, recycling effluent mouth 5 is provided with at the medium position of described tower body 1, overflow weir 6 is provided with at the close tip position of described tower body 1, the water inlet pipe 7 be connected with described water-in 2 is provided with in the inside of described tower body 1, described water inlet pipe 7 comprises house steward 71 and arm 72, described house steward 71 is connected with described water-in 2, described house steward 71 is in annular, described arm 72 has 3-5 and is distributed on described house steward 71 and is communicated with described house steward 71, described arm 72 is 40-60 ° with the angle of the tangential direction of described annular, described arm 72 is to the top water outlet in the shape of a spiral towards described tower body 1, described recycling effluent mouth 5 is connected by pipeline with backflow water-in 4, recycle pump 8 is also provided with in the position near backflow water-in 4.

In embodiment as Figure 2-3, mud discharging mouth 3 is lower than water-in 2, backflow water-in 4 flushes with water-in 2, the rational height of recycling effluent mouth 5 is 0.5 with the ratio of the height of described tower body 1, the little 250mm of the radius of tower body described in the radius ratio of the annular of house steward, arm 71 has three, it is 45 ° with the angle of the tangential direction of described annular, the water outlet of this Fenton's reaction tower adopts gravity flow water outlet, overflow weir 6 zig-zag that water outlet is arranged, the distance at the top of overflow weir 6 and the top of described tower body 1 is 400mm.Certainly, be also provided with water pump (not indicating in figure) in water inlet, the top of tower body can adopt removable cover.

Enamel material is wherein that unorganic glass material coagulates the matrix material on matrix stainless steel and together with stainless steel mortise by melting, and tower body is made up of enamel assembling, acid-fast alkali-proof protection against corrosion.

Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For those skilled in the art, without departing from the inventive concept of the premise, some equivalent to substitute or obvious modification can also be made, and performance or purposes identical, all should be considered as belonging to protection scope of the present invention.

Claims (6)

1. a deep treatment method for percolate, is characterized in that, comprises the steps:
(1) percolate is entered Membrane Bioreactor for Wastewater Treatment;
(2) enter Fenton's reaction tower after regulating pH to be 2-3 the water outlet after step (1) process and carry out advanced oxidation process, the oxygenant of described advanced oxidation process is Fenton reagent, and described Fenton reagent is H 2o 2and FeSO 4mixture, add 4-6kg H according to the water entering Fenton's reaction tower per ton 2o 2and 2-2.6kgFeSO 4enter the water of Fenton's reaction tower in the shape of a spiral, the time of described advanced oxidation process is 6-8 hour, in treating processes, again pass back into described Fenton's reaction tower after part water in described Fenton's reaction tower is drawn out of, the water entering Fenton's reaction tower is 1:4 ~ 1:5 with the ratio of the flow of the water passing back into Fenton's reaction tower;
(3) water outlet after step (2) process is entered settling tank, adjustment pH is 9-10, and precipitates by the PAM that the water entering settling tank per ton adds 0.002-0.003kg, and sedimentation time is 12-14 hour;
(4) water outlet after step (3) process is entered anaerobism BAF, the carbon source of 2-3kg is added by the water entering anaerobism BAF per ton, in anaerobism BAF, sludge concentration is 6000-8000mg/L, dissolved oxygen concentration is 0.3-0.5mg/L, and the residence time is 4-5 hour;
(5) water outlet after step (4) process is entered aerobic aeration biological filter, in aerobic aeration biological filter, sludge concentration is 8000-12000mg/L, after dissolved oxygen concentration 2-3mg/L, residence time 10-12 hour, qualified discharge is carried out in water outlet.
2. the deep treatment method of percolate as claimed in claim 1, is characterized in that: the COD≤1000mg/L of the water outlet after step (1) process, NH 3-N≤100mg/L, TN≤200mg/L.
3. the deep treatment method of percolate as claimed in claim 1, is characterized in that: the COD≤300mg/L of the water outlet after step (2) process, NH 3-N≤40mg/L, TN≤160mg/L.
4. the deep treatment method of percolate as claimed in claim 1, is characterized in that: the COD≤270mg/L of the water outlet after step (3) process, NH 3-N≤36mg/L, TN≤150mg/L.
5. the deep treatment method of percolate as claimed in claim 1, is characterized in that: the COD≤180mg/L of the water outlet after step (4) process, NH 3-N≤27mg/L, TN≤80mg/L.
6. the deep treatment method of percolate as claimed in claim 1, is characterized in that: the COD≤75mg/L of the water outlet after step (5) process, NH 3-N≤6mg/L, TN≤20mg/L.
CN201410137029.4A 2014-04-04 2014-04-04 Garbage leachate advanced treatment method and Fenton reaction tower CN103880253B (en)

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Publication number Priority date Publication date Assignee Title
CN103755007B (en) * 2014-02-19 2015-07-08 南京大学 Fenton fluidized bed treatment device and waste water treatment method thereof
CN104192955B (en) * 2014-08-05 2016-04-06 广西大学 The treatment process of ultrafiltration and concentration liquid in a kind of percolate membrane treatment process
CN105668914A (en) * 2015-07-24 2016-06-15 德州蓝德再生资源有限公司 Two-stage Fenton and BAF advanced treatment device and treatment method for garbage concentrated liquid
CN105130131A (en) * 2015-09-25 2015-12-09 河海大学 Treatment system and method of landfill refuse leachate
CN105906142B (en) * 2016-04-29 2019-01-01 安徽华骐环保科技股份有限公司 A kind of landfill leachate advanced treatment system and processing method
CN106045235B (en) * 2016-08-05 2019-03-22 江西沃邦兴环保科技有限公司 A kind for the treatment of process of high-concentration hardly-degradable wastewater from chemical industry
CN106673362A (en) * 2016-12-30 2017-05-17 南昌大学 Combined treatment process of landfill leachate

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CN100532298C (en) * 2006-12-08 2009-08-26 辽宁科技大学 Energy-saving method for processing leachate of middle-aged or old refuse landfill
CN101357812B (en) * 2007-07-31 2010-12-15 深圳市百斯特环保工程有限公司 Processing method for domestic garbage leachate
CN101767914B (en) * 2010-01-12 2011-09-21 广西博世科环保科技股份有限公司 Method for treating garbage leachate
CN101805099B (en) * 2010-04-22 2012-03-28 长沙华时捷环保科技发展有限公司 Treatment methods of landfill leachate and treatment systems thereof
CN203820523U (en) * 2014-04-04 2014-09-10 深圳市百斯特环保工程有限公司 Fenton reaction tower for treatment of landfill leachate

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