CN203820605U - Landfill leachate treatment system achieving national first-level A emission standard - Google Patents
Landfill leachate treatment system achieving national first-level A emission standard Download PDFInfo
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- CN203820605U CN203820605U CN201420217496.3U CN201420217496U CN203820605U CN 203820605 U CN203820605 U CN 203820605U CN 201420217496 U CN201420217496 U CN 201420217496U CN 203820605 U CN203820605 U CN 203820605U
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Abstract
The utility model discloses a landfill leachate treatment system achieving a national first-level A emission standard. The landfill leachate treatment system comprises a water collecting well, a coagulation and sedimentation tank, a heavy metal sedimentation tank, a denitrification tank, a hydrolytic acidification tank, a biogas fermentation tank, a grille well, a contact oxidation tank, an ultrafiltration device, a nanofiltration device and a water outlet well which are connected sequentially, wherein a stirrer is arranged in the coagulation and sedimentation tank, filter cloth is respectively arranged at the bottom of the coagulation and sedimentation tank and the bottom of the heavy metal sedimentation tank, the ultrafiltration device is connected with the coagulation and sedimentation tank, and the nanofiltration device is connected with the heavy metal sedimentation tank. According to the landfill leachate treatment system disclosed by the utility model, the defects of leachate relative to general wastewater are overcome through the effects of coagulation and sedimentation, heavy metal sedimentation and denitrification, and the leachate after treatment can achieve the first-level A emission standard in emission standard of pollutants for municipal wastewater treatment plant, realize direct emission, prevent polluting ground and a water body and further effectively prevent leachate pollution from threatening human health through a food chain.
Description
Technical field
The utility model relates to sewage treatment area, specifically refers to a kind of garbage-leachate processing system that reaches country-level A emission standard.
Background technology
Oozing drop liquid is in the process of municipal solid waste landfill, and due to the effect of compacting and microorganism, pollutent contained in rubbish is with moisture stripping, and the sewage being mixed to form with rainfall, runoff etc.Oozing drop liquid is the secondary pollution producing in garbage loading embeading process, can make surface water body anoxic, water quality deterioration, eutrophication, threaten tap water and industrial or agricultural water water source, make underground water lose utility value, organic pollutant enters food chain will directly threaten human health.
Ooze drop liquid and be different from general waste water, its feature is mainly manifested in: (1) water quality is complicated, not only contains aerobic microbiological, all kinds of metal ion and nutrient for plants (ammonia nitrogen etc.), also may contain poisonous and hazardous organic pollutant; (2) Pollutant levels are high and variation range is large, and chemical oxygen demand (COD) and biochemical oxygen demand (BOD) range up to and reach several ten thousand; (3) in garbage leachate, contained organic pollutant category is many; (4) metal ion content is high, and wherein heavy metal ion can produce restraining effect to biological treatment; (5) ammonia-nitrogen content is high, carbon-nitrogen ratio imbalance, biological treatment difficulty.Owing to oozing drop liquid, be different from general waste water, the garbage leachate that therefore existing leachate treatment system is processed does not reach one-level A emission standard in < < urban wastewater treatment firm pollutant emission standard > > conventionally.
Utility model content
The purpose of this utility model is to provide a kind of garbage-leachate processing system that reaches one-level A emission standard in the < < urban wastewater treatment firm pollutant emission standard > > being put into effect by country.
The utility model is achieved through the following technical solutions:
A kind of garbage-leachate processing system that reaches country-level A emission standard, comprise the pump well, coagulative precipitation tank, heavy metal precipitation pond, denitrification pond, hydrolysis acidification pool, marsh gas fermentation pool, grille well, contact-oxidation pool, ultrafiltration apparatus, nanofiltration equipment, the wet well that connect successively, in coagulative precipitation tank, be provided with agitator, coagulative precipitation tank bottom and bottom, heavy metal precipitation pond are laid with respectively filter cloth, ultrafiltration apparatus is connected with coagulative precipitation tank, and nanofiltration equipment is connected with heavy metal precipitation pond.
Further, between described pump well and coagulative precipitation tank, be provided with mixing tank.By mixing tank, coagulating agent can be evenly distributed to and ooze in drop liquid, improve the result of use of coagulating agent, reduce the usage quantity of coagulating agent.
Further, between described heavy metal precipitation pond and denitrification pond, be provided with equalizing tank.Denitrification pond is anoxic pond, and the impact of being oozed drop flow quantity and change in concentration is larger.By the adjustable concentration of oozing drop liquid of equalizing tank, control the flow that oozes drop liquid, by oozing drop flow quantity and change in concentration, the impact in denitrification pond is controlled to minimum.
Further, also comprise plate type pressure filter, described plate type pressure filter is connected with grille well, coagulative precipitation tank respectively.Ooze after drop liquid ferments in marsh gas fermentation pool and filter and obtain waste residue and filtered liquid by grille well.On the filter cloth of coagulative precipitation tank periodic replacement with coagulation sediment.Waste residue and coagulation sediment produce filtrate and mud cake under the filter pressing of plate type pressure filter.Mud cake can be transported to refuse tip landfill again outward, and filtrate is back to and in coagulation reaction tank, re-starts processing.
Further, also comprise gas blower, in described contact-oxidation pool, be laid with aeration tube, described aeration tube is connected with gas blower.By gas blower and aeration tube, can increase the oxygen-supplying amount in contact-oxidation pool, for the aerobic microbiological oxygenolysis organism in contact-oxidation pool provides sufficient oxygen, accelerate the oxygenolysis speed of contact-oxidation pool, reduce the treatment time of contact-oxidation pool, improve the processing efficiency of whole garbage-leachate processing system.
Further, in described wet well well, be provided with gac.By charcoal absorption after treatment ooze drop liquid, can planar water in peculiar smell, make wet well water outlet can as in water use.
Further, also comprise marsh gas recovery device, described marsh gas recovery device is connected with marsh gas fermentation pool.By the recyclable biogas of marsh gas recovery device, reduce the processing cost of oozing drop liquid.
The utility model compared with prior art, has the following advantages and beneficial effect:
(1) the utility model has been overcome and has been oozed drop liquid phase for the defect of general waste water by coagulating sedimentation, heavy metal precipitation and denitrification, ooze after treatment drop liquid and can reach one-level A emission standard in < < urban wastewater treatment firm pollutant emission standard > >, can directly discharge, not only can not pollute surface water body, can also effectively avoid oozing the pollution of drop liquid and threaten human health by food chain;
(2) the utility model can be processed the waste residue producing in leachate treatment process safely and effectively by plate type pressure filter, has avoided to the full extent the directly harm of discharge to surface water body of waste residue;
(3) the utility model is by wet well well, gac being set, by charcoal absorption after treatment ooze drop liquid, can planar water in peculiar smell, make wet well water outlet can as in water use.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment 1.
Embodiment
Below in conjunction with embodiment, the utility model is described in further detail, but embodiment of the present utility model is not limited to this.
Embodiment 1:
Referring to Fig. 1, a kind of garbage-leachate processing system that reaches country-level A emission standard, comprise the pump well, coagulative precipitation tank, heavy metal precipitation pond, denitrification pond, hydrolysis acidification pool, marsh gas fermentation pool, grille well, contact-oxidation pool, ultrafiltration apparatus, nanofiltration equipment, the wet well that connect successively, in coagulative precipitation tank, be provided with agitator, coagulative precipitation tank bottom and bottom, heavy metal precipitation pond are laid with respectively filter cloth, ultrafiltration apparatus is connected with coagulative precipitation tank, and nanofiltration equipment is connected with heavy metal precipitation pond.
Owing to oozing, drop liquid water quality is complicated, and Pollutant levels are high and variation range is large, and organic pollutant category is many, and heavy metal ion content is high, and ammonia-nitrogen content is high.The present embodiment mainly eliminated and oozed drop liquid defect by following step, impels the drop liquid that oozes after processing to reach country-level A emission standard.By the coagulating sedimentation in coagulative precipitation tank, reduce and ooze colloid and total suspended solids in drop liquid.By heavy metal precipitator in heavy metal precipitation pond, separate the heavy metal ion of oozing in drop liquid, avoid the existence impact biological treatment of heavy metal ion.By the denitrification in denitrification pond, consume ammonia nitrogen in water, reduce biological treatment difficulty.By hydrolysis acidification pool, degrade and ooze miscellaneous organism in drop liquid, make macromole hardly degraded organic substance be degraded to low molecule labile organic compound.By objectionable impuritiess such as the bacterium in ultrafiltration apparatus energy filtering water, iron rust, colloids, retain original trace element and mineral substance in water.The concentrated solution A producing in ultrafiltration apparatus working process is again back to and in coagulation reaction tank, re-starts processing.By nanofiltration equipment, can isolate the impurity such as colloid, organism, bacterium, microorganism, avoid these impurity to enter wet well, affect wet well water quality.The concentrated solution B producing in the process of the impurity such as nanofiltration equipment isolation colloid, organism, bacterium, microorganism is back in heavy metal precipitation pond and re-starts processing.The drop liquid that oozes is after treatment discharged in wet well and reduces water energy, and now the water quality of wet well has reached country-level A emission standard, can directly discharge.
For better realizing the utility model, between described pump well and coagulative precipitation tank, be provided with mixing tank.By mixing tank, coagulating agent can be evenly distributed to and ooze in drop liquid, improve the result of use of coagulating agent, reduce the usage quantity of coagulating agent.
For better realizing the utility model, between described heavy metal precipitation pond and denitrification pond, be provided with equalizing tank.Denitrification pond is anoxic pond, and the impact of being oozed drop flow quantity and change in concentration is larger.By the adjustable concentration of oozing drop liquid of equalizing tank, control the flow that oozes drop liquid, by oozing drop flow quantity and change in concentration, the impact in denitrification pond is controlled to minimum.
For better realizing the utility model, also comprise plate type pressure filter, described plate type pressure filter is connected with grille well, coagulative precipitation tank respectively.Ooze after drop liquid ferments in marsh gas fermentation pool and filter and obtain waste residue and filtered liquid by grille well.On the filter cloth of coagulative precipitation tank periodic replacement with coagulation sediment.Waste residue and coagulation sediment produce filtrate and mud cake under the filter pressing of plate type pressure filter.Mud cake can be transported to refuse tip landfill again outward, and filtrate is back to and in coagulation reaction tank, re-starts processing.
For better realizing the utility model, also comprise gas blower, in described contact-oxidation pool, be laid with aeration tube, described aeration tube is connected with gas blower.By gas blower and aeration tube, can increase the oxygen-supplying amount in contact-oxidation pool, for the aerobic microbiological oxygenolysis organism in contact-oxidation pool provides sufficient oxygen, accelerate the oxygenolysis speed of contact-oxidation pool, reduce the treatment time of contact-oxidation pool, improve the processing efficiency of whole garbage-leachate processing system.
For better realizing the utility model, in described wet well well, be provided with gac.By charcoal absorption after treatment ooze drop liquid, can planar water in peculiar smell, make wet well water outlet can as in water use.
For better realizing the utility model, also comprise marsh gas recovery device, described marsh gas recovery device is connected with marsh gas fermentation pool.By the recyclable biogas of marsh gas recovery device, reduce the processing cost of oozing drop liquid.
The above; it is only preferred embodiment of the present utility model; not the utility model is done to any pro forma restriction, any simple modification, equivalent variations that every foundation technical spirit of the present utility model is done above embodiment, within all falling into protection domain of the present utility model.
Claims (7)
1. a garbage-leachate processing system that reaches country-level A emission standard, it is characterized in that: comprise the pump well, coagulative precipitation tank, heavy metal precipitation pond, denitrification pond, hydrolysis acidification pool, marsh gas fermentation pool, grille well, contact-oxidation pool, ultrafiltration apparatus, nanofiltration equipment, the wet well that connect successively, in described coagulative precipitation tank, be provided with agitator, described coagulative precipitation tank bottom and bottom, heavy metal precipitation pond are laid with respectively filter cloth, described ultrafiltration apparatus is connected with coagulative precipitation tank, and described nanofiltration equipment is connected with heavy metal precipitation pond.
2. a kind of garbage-leachate processing system that reaches country-level A emission standard according to claim 1, is characterized in that: between described pump well and coagulative precipitation tank, be provided with mixing tank.
3. a kind of garbage-leachate processing system that reaches country-level A emission standard according to claim 1, is characterized in that: between described heavy metal precipitation pond and denitrification pond, be provided with equalizing tank.
4. a kind of garbage-leachate processing system that reaches country-level A emission standard according to claim 1, is characterized in that: also comprise plate type pressure filter, described plate type pressure filter is connected with grille well, coagulative precipitation tank respectively.
5. a kind of garbage-leachate processing system that reaches country-level A emission standard according to claim 1, is characterized in that: also comprise gas blower, in described contact-oxidation pool, be laid with aeration tube, described aeration tube is connected with gas blower.
6. a kind of garbage-leachate processing system that reaches country-level A emission standard according to claim 1, is characterized in that: in described wet well well, be provided with gac.
7. a kind of garbage-leachate processing system that reaches country-level A emission standard according to claim 1, is characterized in that: also comprise marsh gas recovery device, described marsh gas recovery device is connected with marsh gas fermentation pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420217496.3U CN203820605U (en) | 2014-04-30 | 2014-04-30 | Landfill leachate treatment system achieving national first-level A emission standard |
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| CN201420217496.3U CN203820605U (en) | 2014-04-30 | 2014-04-30 | Landfill leachate treatment system achieving national first-level A emission standard |
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| CN203820605U true CN203820605U (en) | 2014-09-10 |
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| CN201420217496.3U Expired - Fee Related CN203820605U (en) | 2014-04-30 | 2014-04-30 | Landfill leachate treatment system achieving national first-level A emission standard |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2565000A1 (en) * | 2014-09-26 | 2016-03-30 | Mancar Tecnologías Sl | Process and system of leachate mineralization (Machine-translation by Google Translate, not legally binding) |
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2014
- 2014-04-30 CN CN201420217496.3U patent/CN203820605U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2565000A1 (en) * | 2014-09-26 | 2016-03-30 | Mancar Tecnologías Sl | Process and system of leachate mineralization (Machine-translation by Google Translate, not legally binding) |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20190430 |