CN109879572A - Landfill leachate advanced purification process system - Google Patents

Landfill leachate advanced purification process system Download PDF

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Publication number
CN109879572A
CN109879572A CN201910274611.8A CN201910274611A CN109879572A CN 109879572 A CN109879572 A CN 109879572A CN 201910274611 A CN201910274611 A CN 201910274611A CN 109879572 A CN109879572 A CN 109879572A
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China
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subsystem
anoxic
level
aerobic
slot
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CN201910274611.8A
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Chinese (zh)
Inventor
况力
郑辉
王尧
王静
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CHONGQING GANGLI ENVIRONMENTAL PROTECTION Co.,Ltd.
Chongqing GANGLONG Environmental Protection Technology Co.,Ltd.
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Port Of Chongqing Power Environmental Protection Coltd
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Priority to CN201910274611.8A priority Critical patent/CN109879572A/en
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Abstract

A kind of landfill leachate advanced purification process system that the present invention announces, including materialized pretreatment subsystem, biochemical treatment subsystem and embrane method advanced treating subsystem;Materialized pretreatment subsystem includes leachate collection pool, inlet water lifting pumps, bag filter, coagulant drug-adding device, coagulating slot, flocculant chemicals dosing plant, flocculation reaction slot, precipitation tank, sludge-tank, sludge force (forcing) pump and filter press;Biochemical treatment subsystem includes that quenched slot, denitrifying carbon source chemicals dosing plant, biochemical elevator pump, level-one Anoxic/Aerobic biochemical reactor, second level Anoxic/Aerobic biochemical reactor, level-one reflux pump, second level reflux pump and bio-chemical effluent slot, embrane method advanced treating subsystem include MBR subsystem, NF subsystem, RO subsystem and DTRO subsystem.After the present invention passes through three-level system fine processing, percolate can be effectively purified, relevant emission standards are reached, prevents Landfill Leachate Pollution environment.

Description

Landfill leachate advanced purification process system
Technical field
The invention belongs to technical field of domestic garbage treatment, and in particular to a kind of landfill leachate advanced purification process system System.
Background technique
Domestic refuse landfill is mainly carried out in a manner of rubbish mixed collection and blended landfill, the composition of rubbish at Divide complexity, landfill leachate refers to the moisture that rubbish itself contains in refuse landfill, the sleet water into landfill yard And other moisture, the saturation moisture capacity of rubbish, overburden layer is deducted, and undergo waste layer and overburden layer and a kind of high concentration for being formed Organic wastewater.
Landfill leachate not only contains oxygen consumption organic pollutant, also contains each metalloid and nutrient for plants (ammonia nitrogen etc.); BOD5, COD concentration are high, significantly larger than municipal sewage;Organic pollutant category is more, wherein being difficult to biodegradable naphthalene, phenanthrene etc. Non-chlorinated aromatic compounds, chlorinated aromatic group compound, phosphate, phthalic acid ester, phenolic compound and phenyl amines Close object etc.;Contain ten various metals ions in landfill leachate, heavy metal ion therein can generate inhibiting effect to microorganism; Ammonia-nitrogen content is high, and C/N is out of proportion, and P elements lack.Therefore, landfill leachate can cause environment greatly to pollute.
Summary of the invention
In view of the above technical problems, the present invention is intended to provide consumer waste landfill percolate can be effectively treated in one kind, It is set to be finally reached the landfill leachate advanced purification process system of relevant emission standards.
For this purpose, the technical scheme adopted by the invention is as follows: a kind of landfill leachate advanced purification process system, including materialization Pre-process subsystem, biochemical treatment subsystem and embrane method advanced treating subsystem;
The materialized pretreatment subsystem includes leachate collection pool, inlet water lifting pumps, bag filter, coagulant dosing Device, coagulating slot, flocculant chemicals dosing plant, flocculation reaction slot, precipitation tank, sludge-tank, sludge force (forcing) pump and filter press, institute The percolate stated in leachate collection pool is lifted into bag filter through inlet water lifting pumps pressurization, and the bag filter goes out The mouth of a river is connected with coagulating slot, and coagulant, the coagulation are added into coagulating slot by the coagulant drug-adding device The water outlet of reactive tank is connected with flocculation reaction slot, and flocculation is added into flocculation reaction slot by the flocculant chemicals dosing plant The water outlet of agent, the flocculation reaction slot is connected with precipitation tank, and the sludge precipitated in the bottom bucket of the precipitation tank enters dirt Mud sump is delivered to filter press by sludge force (forcing) pump and carries out filter-press dehydration, and the filters pressing water of the filter press drains into trench, after dehydration Sludge be transported to refuse landfill processing;
The biochemical treatment subsystem includes that quenched slot, denitrifying carbon source chemicals dosing plant, biochemical elevator pump, level-one anoxic are good Oxygen biochemical reactor, second level Anoxic/Aerobic biochemical reactor, level-one reflux pump, second level reflux pump and bio-chemical effluent slot are described heavy Supernatant in the slot of shallow lake enters quenched slot, it is quenched after the completion of percolate through the pressurization of biochemical elevator pump to be lifted into level-one anoxic good The anoxic section of oxygen biochemical reactor, the water outlet and level-one Anoxic/Aerobic of the anoxic section of the level-one Anoxic/Aerobic biochemical reactor The aerobic section of biochemical reactor is connected, and the water part of the aerobic section of the level-one Anoxic/Aerobic biochemical reactor passes through reflux pump It is back to the anoxic section of level-one Anoxic/Aerobic biochemical reactor, rest part enters the anoxic of second level Anoxic/Aerobic biochemical reactor Section, the water outlet of the anoxic section of the second level Anoxic/Aerobic biochemical reactor and the aerobic section of second level Anoxic/Aerobic biochemical reactor It is connected, the water part of the aerobic section of the second level Anoxic/Aerobic biochemical reactor is back to second level Anoxic/Aerobic by reflux pump The anoxic section of biochemical reactor, rest part enter bio-chemical effluent slot, the aerobic section of the second level Anoxic/Aerobic biochemical reactor The sludge of interior precipitating is discharged into sludge-tank, by denitrifying carbon source chemicals dosing plant to the anoxic section of level-one Anoxic/Aerobic biochemical reactor Denitrifying carbon source is added in the anoxic section of second level Anoxic/Aerobic biochemical reactor;
The embrane method advanced treating subsystem includes MBR subsystem, NF subsystem, RO subsystem and DTRO subsystem, institute The percolate of bio-chemical effluent slot is stated by membranous system intake pump pressurized delivered to MBR subsystem, the water outlet of the MBR subsystem into Enter MBR clear liquid case, the clear liquid in MBR clear liquid case passes through NF intake pump pressurized delivered to NF subsystem, point of the MBR subsystem It separates out the biochemical sludge come and is back to level-one Anoxic/Aerobic biochemical reactor, it is clear that the clear liquid that the NF subsystem separating goes out enters NF Liquid case, the dope that the clear liquid in NF clear liquid case is gone out by RO intake pump pressurized delivered to RO subsystem, the NF subsystem separating Into dope case, the water outlet of the RO subsystem is connected with fresh-water tank, concentrated water outlet and the dope case of the RO subsystem It is connected, the water outlet of the dope case passes through DTRO intake pump pressurized delivered to DTRO subsystem, the fresh water of the DTRO subsystem Outlet is connected with fresh-water tank, and the concentrated water that the DTRO subsystem separating goes out enters recharge slot, then extremely by recharging pump pressurized delivered Refuse landfill carries out recharge processing.
Preferably, passing through aerobic section of the level-one jetting type aeration pump to the level-one Anoxic/Aerobic biochemical reactor respectively Interior oxygenation is oxygenated by secondary jets formula aeration pump into the aerobic section of second level Anoxic/Aerobic biochemical reactor.Using the above knot Structure, molten gas is high-efficient, and equipment is simple, easy to maintain.
Preferably, the water outlet of the fresh-water tank is connected with discharge pond, it is provided with sampling pump in the discharge pond, institute Sewage treatment plant's progress subsequent processing can be emitted into after detection is up to standard by stating the water outlet in discharge pond.Using the above structure, energy Whether the enough sewage of quickly detection after processing reaches discharge standard, examines treatment effect.
Preferably, the water outlet in the discharge pond is connected with Bashel flow channel, discharged after metering.Use with Upper structure can measure discharge water yield, convenient for statistics and management.
Preferably, the filter press is chamber-type press filter.Using the above structure, it is conveniently replaceable filter cloth, it is easy to maintain.
The beneficial effects of the present invention are: landfill leachate is through materialized pretreatment subsystem, biochemical treatment subsystem and embrane method After advanced treating subsystem three-level system fine processing, percolate can be effectively purified, treated, and percolate can reach " raw Refuse landfill living controls standard " GB16889-2008, prevent Landfill Leachate Pollution environment.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
By way of example and in conjunction with the accompanying drawings, the invention will be further described:
As shown in Figure 1, a kind of landfill leachate advanced purification process system, by materialized pretreatment subsystem, biochemical treatment Subsystem and embrane method advanced treating subsystem composition;Materialized pretreatment subsystem is by leachate collection pool 1, inlet water lifting pumps 2, bag Formula filter 3, coagulant drug-adding device 14, coagulating slot 4, flocculant chemicals dosing plant 15, flocculation reaction slot 5, precipitation tank 6, Sludge-tank 7, sludge force (forcing) pump 8 and filter press 9 form;Biochemical treatment subsystem is by quenched slot 10, denitrifying carbon source chemicals dosing plant 21, biochemical elevator pump 11, level-one Anoxic/Aerobic biochemical reactor 12, second level Anoxic/Aerobic biochemical reactor 13, level-one reflux pump 17, second level reflux pump 19, level-one jetting type aeration pump 18, secondary jets formula aeration pump 20 and bio-chemical effluent slot 16 form;Embrane method Advanced treating subsystem by membranous system intake pump 22, MBR subsystem 23, MBR clear liquid case 24, NF intake pump 25, NF subsystem 26, NF clear liquid case 27, RO intake pump 28, RO subsystem 29, dope case 30, DTRO intake pump 31, DTRO subsystem 32, recharge slot 33, Recharging pump 34, fresh-water tank 35, discharge pond 36 and Bashel flow channel 37 form, and MBR subsystem 23 is external membrane biological respinse Device system, NF subsystem 26 are nanofiltration system, RO subsystem 29 i.e. counter-infiltration system, and DTRO subsystem 32 is disc tube reverse osmosis (dt-ro) System.
As shown in Figure 1, materialized pretreatment subsystem removes rubbish by filtering, coagulating, flocculation reaction and precipitation Bulky grain sundries, suspended matter in rubbish percolate etc., the percolate in leachate collection pool 1 pressurizes through inlet water lifting pumps 2 to be promoted Into bag filter 3, the bulky grain sundries in removal percolate, pocket type mistake are intercepted with accurate filter bag in bag filter 3 The water outlet of filter 3 is connected with coagulating slot 4, and the water outlet of coagulating slot 4 is connected with flocculation reaction slot 5, passes through coagulation Orange medicine is added into coagulating slot 4 as coagulant for agent chemicals dosing plant 14, makes percolate generation coagulating, in percolate Suspension pollutant generates tiny alumen ustum together with coagulant, and the water outlet of coagulating slot 4 is connected with flocculation reaction slot 5, seeps Filtrate is flow automatically after coagulating enters flocculation reaction slot 5, is added by flocculant chemicals dosing plant 15 into flocculation reaction slot 5 white Medicine makes percolate that flocculation reaction occur as flocculant, and previous tiny alumen ustum generates big alumen ustum together with flocculant, and flocculation is anti- The water outlet of slot 5 is answered to be connected with precipitation tank 6, the percolate gravity flow after flocculation reaction, which enters in precipitation tank 6, to be precipitated, and is precipitated The sludge precipitated in the bottom bucket of slot 6 enters sludge-tank 7, and the sludge in sludge-tank 7 is delivered to filters pressing by sludge force (forcing) pump 8 Machine 9 carries out filter-press dehydration, and in the present embodiment, filter press 9 uses chamber-type press filter, and the filters pressing water of filter press 9 drains into trench, is dehydrated Sludge afterwards is transported to refuse landfill processing, and percolate forms supernatant on 6 top of precipitation tank, and gravity flow enters biochemical treatment system System.
As shown in Figure 1, biochemical treatment subsystem removed by denitrification and nitrification it is most total in percolate Nitrogen pollutant and ammonia nitrogen pollutant, the supernatant in precipitation tank 6 enter quenched slot 10, and homogeneous average is quenched complete in quenched slot 10 Percolate after is lifted into the anoxic section 12a of level-one Anoxic/Aerobic biochemical reactor, level-one through the pressurization of biochemical elevator pump 11 The water outlet of the anoxic section 12a of Anoxic/Aerobic biochemical reactor is connected with the aerobic section 12b of level-one Anoxic/Aerobic biochemical reactor, The water part of the aerobic section 12b of level-one Anoxic/Aerobic biochemical reactor is back to level-one Anoxic/Aerobic by level-one reflux pump 17 The anoxic section 12a of biochemical reactor, rest part enter the anoxic section 13a of second level Anoxic/Aerobic biochemical reactor, pass through anti-nitre Change carbon source chemicals dosing plant 21 and denitrifying carbon source is added into the anoxic section 12a of level-one Anoxic/Aerobic biochemical reactor, makes denitrification Denitrification denitrogenation reaction occurs for microorganism, removes most total nitrogen pollutant in percolate, biochemical anti-in level-one Anoxic/Aerobic It answers in the aerobic section 12b of device, through level-one jetting type aeration pump 18 into the aerobic section 12b of level-one Anoxic/Aerobic biochemical reactor Oxygenation, nitrifying microorganisms make the ammonia nitrogen pollutant in percolate that nitration reaction occur under aerobic condition, remove most ammonia-nitrogen Pollutant arrives the water outlet high-flow backflow of the aerobic section 12b of level-one Anoxic/Aerobic biochemical reactor by level-one reflux pump 17 The water inlet end of the anoxic section 12a of level-one Anoxic/Aerobic biochemical reactor, guarantees that anti-nitration reaction is normally carried out;Second level Anoxic/Aerobic The water outlet of the anoxic section 13a of biochemical reactor is connected with the aerobic section 13b of second level Anoxic/Aerobic biochemical reactor, second level anoxic The water part of the aerobic section 13b of aerobic biochemical reactor is back to second level Anoxic/Aerobic biochemical reaction by second level reflux pump 19 The anoxic section 13a of device, rest part enter bio-chemical effluent slot 16, the aerobic section 13b of the second level Anoxic/Aerobic biochemical reactor The sludge of interior precipitating is discharged into sludge-tank 7, passes through the lacking to second level Anoxic/Aerobic biochemical reactor of denitrifying carbon source chemicals dosing plant 21 Denitrifying carbon source is added in oxygen section 13a, makes denitrifying microorganism that denitrification denitrogenation reaction occur, removes again total in percolate Nitrogen pollutant is lacked by secondary jets formula aeration pump 20 to second level in the aerobic section 13b of second level Anoxic/Aerobic biochemical reactor Oxygenation, nitrifying microorganisms make the ammonia nitrogen pollutant in percolate under aerobic condition in the aerobic section of oxygen aerobic biochemical reactor 13 Nitration reaction occurs, removes ammonia nitrogen pollutant again, the good of second level Anoxic/Aerobic biochemical reactor is made by second level reflux pump 19 The water outlet high-flow backflow of oxygen section 13b to second level Anoxic/Aerobic biochemical reactor anoxic section 13a water inlet end, guarantee denitrification Reaction is normally carried out;The water outlet gravity flow of the aerobic section 13b of second level Anoxic/Aerobic biochemical reactor enters bio-chemical effluent slot 16.
As shown in Figure 1, embrane method advanced treating subsystem purifies percolate step by step by multiple filtration, it is finally reached discharge Standard, the life of the percolate of bio-chemical effluent slot 16 by 22 pressurized delivered of membranous system intake pump to MBR subsystem 23, in percolate Change sludge to be separated by MBR subsystem 23, and be back to level-one Anoxic/Aerobic biochemical reactor 12, MBR subsystem 23 goes out The mouth of a river is connected with MBR clear liquid case 24, and through MBR subsystem 23, treated that percolate is stored to MBR clear liquid case 24, MBR clear liquid case Percolate in 24 passes through the filtration of NF subsystem 26, diafiltration by 25 pressurized delivered of NF intake pump to NF subsystem 26 The pollutants such as the larger molecular organics in liquid are efficiently removed, and the concentrated water outlet of NF subsystem 26 is connected with dope case 30, fresh water Outlet is connected with NF clear liquid case 27, and the percolate in NF clear liquid case 27 enters RO subsystem by 28 pressurized delivered of RO intake pump 29, in RO subsystem 29, the pollutants such as remaining ammonia nitrogen, total nitrogen, total phosphorus and small organic molecule are effectively gone in percolate It removes, the water outlet of RO subsystem 29 is connected with fresh-water tank 35, and concentrated water outlet is connected with dope case 30, and the dope of dope case 30 is logical It crosses 31 pressurized delivered of DTRO intake pump and enters DTRO subsystem 32, in DTRO subsystem 32, dope is further concentrated, separation Water outlet for fresh water and concentrated water, DTRO subsystem 32 is connected with fresh-water tank 35, and concentrated water outlet is connected with recharge slot 33, recharge The concentrated water of slot 33 is transported to refuse landfill recharge processing, water outlet and discharge 36 phase of pond of fresh-water tank 35 by recharging pump 34 Even, it is provided with sampling pump in discharge pond 36, the water quality for discharging water in pond 36 is carried out by sample detecting by sampling pump, discharges pond 36 water outlet is connected with Bashel flow channel 37, can measure to discharge amount, discharges in pond 36 after detection is up to standard Water can be reserved for one's own use into metered discharge in Bashel flow channel 37.

Claims (5)

1. a kind of landfill leachate advanced purification process system, it is characterised in that: including materialized pretreatment subsystem, biochemical treatment Subsystem and embrane method advanced treating subsystem;
The materialized pretreatment subsystem includes leachate collection pool, inlet water lifting pumps, bag filter, coagulant dosing dress It sets, coagulating slot, flocculant chemicals dosing plant, flocculation reaction slot, precipitation tank, sludge-tank, sludge force (forcing) pump and filter press, it is described Percolate in leachate collection pool is lifted into bag filter, the water outlet of the bag filter through inlet water lifting pumps pressurization Mouth is connected with coagulating slot, coagulant is added into coagulating slot by the coagulant drug-adding device, the coagulation is anti- It answers the water outlet of slot to be connected with flocculation reaction slot, flocculant is added into flocculation reaction slot by the flocculant chemicals dosing plant, The water outlet of the flocculation reaction slot is connected with precipitation tank, and the sludge precipitated in the bottom bucket of the precipitation tank enters sludge Pond is delivered to filter press by sludge force (forcing) pump and carries out filter-press dehydration, and the filters pressing water of the filter press drains into trench, dewatered Sludge is transported to refuse landfill processing;
The biochemical treatment subsystem includes quenched slot, denitrifying carbon source chemicals dosing plant, biochemical elevator pump, the life of level-one Anoxic/Aerobic Change reactor, second level Anoxic/Aerobic biochemical reactor, level-one reflux pump, second level reflux pump and bio-chemical effluent slot, the precipitation tank Interior supernatant enters quenched slot, it is quenched after the completion of percolate through the pressurization of biochemical elevator pump to be lifted into level-one Anoxic/Aerobic raw Change the anoxic section of reactor, the water outlet and level-one Anoxic/Aerobic of the anoxic section of the level-one Anoxic/Aerobic biochemical reactor are biochemical The aerobic section of reactor is connected, and the water part of the aerobic section of the level-one Anoxic/Aerobic biochemical reactor passes through level-one reflux pump It is back to the anoxic section of level-one Anoxic/Aerobic biochemical reactor, rest part enters the anoxic of second level Anoxic/Aerobic biochemical reactor Section, the water outlet of the anoxic section of the second level Anoxic/Aerobic biochemical reactor and the aerobic section of second level Anoxic/Aerobic biochemical reactor It is connected, the water part of the aerobic section of the second level Anoxic/Aerobic biochemical reactor is back to second level anoxic by second level reflux pump The anoxic section of aerobic biochemical reactor, rest part enter bio-chemical effluent slot, the second level Anoxic/Aerobic biochemical reactor it is good The sludge precipitated in oxygen section is discharged into sludge-tank, passes through denitrifying carbon source chemicals dosing plant lacking to level-one Anoxic/Aerobic biochemical reactor Denitrifying carbon source is added in oxygen section and the anoxic section of second level Anoxic/Aerobic biochemical reactor;
The embrane method advanced treating subsystem includes MBR subsystem, NF subsystem, RO subsystem and DTRO subsystem, the life The percolate of sink is dissolved by membranous system intake pump pressurized delivered to MBR subsystem, the water outlet of the MBR subsystem enters MBR clear liquid case, the clear liquid in MBR clear liquid case pass through NF intake pump pressurized delivered to NF subsystem, the separation of the MBR subsystem Biochemical sludge out is back to level-one Anoxic/Aerobic biochemical reactor, and the clear liquid that the NF subsystem separating goes out enters NF clear liquid Case, the clear liquid in NF clear liquid case by RO intake pump pressurized delivered to RO subsystem, the dope that the NF subsystem separating goes out into Enter dope case, the water outlet of the RO subsystem is connected with fresh-water tank, concentrated water outlet and the dope case phase of the RO subsystem Even, by DTRO intake pump pressurized delivered to DTRO subsystem, the fresh water of the DTRO subsystem goes out for the water outlet of the dope case Mouth is connected with fresh-water tank, and the concentrated water that the DTRO subsystem separating goes out enters recharge slot, then passes through recharging pump pressurized delivered to rubbish Rubbish landfill yard carries out recharge processing.
2. landfill leachate advanced purification process system according to claim 1, it is characterised in that: penetrated respectively by level-one Streaming aeration pump is oxygenated into the aerobic section of the level-one Anoxic/Aerobic biochemical reactor, by secondary jets formula aeration pump to two Oxygenation in the aerobic section of grade Anoxic/Aerobic biochemical reactor.
3. landfill leachate advanced purification process system according to claim 1, it is characterised in that: the fresh-water tank goes out The mouth of a river is connected with discharge pond, and sampling pump is provided in the discharge pond, and the water outlet in the discharge pond is after detection is up to standard Sewage treatment plant can be emitted into and carry out subsequent processing.
4. landfill leachate advanced purification process system according to claim 3, it is characterised in that: the discharge pond goes out The mouth of a river is connected with Bashel flow channel, is discharged after metering.
5. landfill leachate advanced purification process system according to claim 1, it is characterised in that: the filter press is compartment Formula filter press.
CN201910274611.8A 2019-04-08 2019-04-08 Landfill leachate advanced purification process system Pending CN109879572A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110482760A (en) * 2019-08-29 2019-11-22 上海丰信环保科技有限公司 A kind of Treated sewage reusing technique of zero discharge

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110482760A (en) * 2019-08-29 2019-11-22 上海丰信环保科技有限公司 A kind of Treated sewage reusing technique of zero discharge

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