CN104418456A - Method for recycling household refuse landfill leachate - Google Patents
Method for recycling household refuse landfill leachate Download PDFInfo
- Publication number
- CN104418456A CN104418456A CN201310402805.4A CN201310402805A CN104418456A CN 104418456 A CN104418456 A CN 104418456A CN 201310402805 A CN201310402805 A CN 201310402805A CN 104418456 A CN104418456 A CN 104418456A
- Authority
- CN
- China
- Prior art keywords
- concentration
- percolate
- stage
- concentration liquid
- liquid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/10—Liquid waste
- F23G2209/101—Waste liquor
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fertilizers (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a method for recycling household refuse landfill leachate. The method is characterized by comprising the following steps: 1) pumping leachate which is decomposed by an anaerobic bioreactor or landfill leachate entering into a methane-producing phase into a first-stage ultrafiltration system, wherein the operation pressure difference is 0.3-0.5Mpa, the concentration multiple is 5-10 times; and carrying out membrane separation to obtain first-stage concentrated liquor; 2) pumping first-stage concentrated liquor into a second-stage ultrafiltration system, wherein the operation pressure difference is 1.0-1.5Mpa and the concentration multiple is 4-5 times; and carrying out membrane separation to obtain second-stage concentrated liquor; and 3) enabling the second-stage concentrated liquor to flow into a submerged combustion evaporation system and carrying out concentration and purification to obtain an organic liquid fertilizer under the conditions that the temperature of the combustion chamber is greater than or equal to 750 DEGC, the immersion depth is 0.3-0.6m and the concentration multiple is 5-10 times.
Description
Technical field
The invention belongs to technical field of waste treatment, particularly from consumer waste landfill percolate, extract humic acids and the process for reclaiming of simmer down to organic liquid fertilizer.
Background technology
Sanitary landfill is because of the major way that economy is cheap, technically reliable is Disposal of Domestic always, and in the daily operation management of landfill yard, the process of percolate is up to standard so far or a difficult problem, becomes the main secondary pollution source of city life garbage landfill.Form refractory organic-humic acids and ammonia nitrogen that the unmanageable essential reason of percolate is to contain in percolate high density, the former reality is more difficult to resolve certainly, because much research and engineering practice all show, as long as reasonable selection reactor or Optimizing Process Parameters, even if ammonia nitrogen concentration is high to about 1500mg/L, still up to standard by biological nitration.And the humic acids of difficult for biological degradation, be all difficult to effective removal by biochemical and conventional physicochemical techniques.At present, the practical art that process percolate Absorbable organic halogens reaches first discharge standard only has membrane process, is mainly reverse osmosis and nanofiltration, but its investment and working cost all higher, and the concentrated solution that retains usually accounting for original volume 10 ~ 25% in addition needs to process further.Because reverse osmosis and nanofiltration are generally to composition each in concentrated solution, the rejection comprising organism and inorganic salt is all very high, selectivity is poor again, especially reverse osmosis, all retain almost indiscriminately, therefore, the complicated component of concentrated solution, concentration is high, at present its treatment process mainly contain recharge, burn, solidification etc., wherein burns and solidify with high costs, and it is lower to recharge cost, but can cause recharging the accumulation of salt ion in the percolate of rear landfill yard, this will affect the normal operation of membrane process.In sum, percolate is considered all there is certain problem and shortcoming from process angle merely.
Summary of the invention
Humic acids affects percolate process principal pollutant difficult up to standard, but it is also the main component of organic fertilizer, therefore the invention provides reconcentration be separated humic acids from percolate after is the process for reclaiming of organic liquid fertilizer, this technique also makes the handlability of percolate improve or can up to standardly process simultaneously, and overcomes problem and the shortcoming of concentrated solution process in reverse osmosis and nanofiltration technique.
The invention provides the reuse method of one way of life percolate from garbage filling field,
Comprise the steps:
1) by the percolate after decomposing through anaerobic biological reactor, pump into one-level ultrafiltration system, operating pressure difference is 0.3 ~ 0.5Mpa, and cycles of concentration is 5 ~ 10 times, obtains primary concentration liquid after membrane sepn;
2) primary concentration liquid pump is entered two-stage ultrafiltering system, operating pressure difference is 1.0 ~ 1.5Mpa, and cycles of concentration is 4 ~ 5 times, obtains secondary concentration liquid after membrane sepn;
3) allow secondary concentration liquid flow into submerged combustion evaporation system, chamber temperature >=750 DEG C, submergence 0.3 ~ 0.6m, cycles of concentration is 5 ~ 10 times, obtains organic liquid fertilizer after concentrated, purification.
The relative molecular weight that retains of two-stage ultrafiltration system of the present invention film used is 500 ~ 5000.
When the present invention utilizes two-stage ultrafiltering system process primary concentration liquid, add a small amount of hydrochloric acid and reduce calcium carbonate concentration in primary concentration liquid, and remain that pH value is more than 7, to avoid calcium carbonate blockage problem occurs.
When the present invention utilizes two-stage ultrafiltering system process primary concentration liquid, regulate the pH value of primary concentration liquid to acid range, to make under in primary concentration liquid, heavy metal element is in free state and through film, the pH value of permeate is regulated to precipitate removal heavy metal to alkaline range again, to ensure that in final organic liquid fertilizer, heavy metal element concentration is in claimed range.
Feature of the present invention is: for percolate because causing the main problem that in process water outlet, organic indicator is difficult up to standard containing higher concentration humic acids, propose process for reclaiming, taken into account the process up to standard of percolate simultaneously from another angle.
Embodiment
Below percolate process for reclaiming of the present invention is further described.
Percolate after anaerobic biological reactor decomposes, or entered the percolate of methane phase stage landfill yard, in the organism contained, most of character is more stable.This kind of percolate is promoted by pump and enters sandfiltration pot, removes particle diameter and is greater than the particulate matter such as the mud of more than 1 ~ 10 μm, ensure the good operation of subsequent ultrafiltration system.Water outlet enters one-level ultrafiltration system with pump again, under pressure (operating pressure difference is 0.3 ~ 0.5Mpa) drives, percolate is divided into two portions: the primary concentration liquid (cycles of concentration is 5 ~ 10 times) that a part retains for film, be rich in the refractory organic based on humic acids, dense, and contained be divided into the charging percolate before total solvability residue (TDS) of main body and membrane sepn substantially close with inorganic salt, namely mineral ion can well pass through in one-level ultrafiltration system, and this part water yield of primary concentration liquid accounts for into water 10 ~ 20%; Another part is permeate, and the water yield accounts for into water 80 ~ 90%, contained organism molecular weight, and biodegradability improves greatly, easily process rear discharge up to standard further.The primary concentration liquid that film is retained down containing humic acids will be used as the relevant requirements that humus organic liquid fertilizer does not also reach product in concentration and quality, needs to be separated further to concentrate.In order to not make inorganic salinity too high levels in the finished product, primary concentration liquid is first again through the two-stage ultrafiltering systematic position of larger pressure difference, and operating pressure difference is 1.0 ~ 1.5Mpa, and cycles of concentration can reach 4 ~ 5 times, obtains secondary concentration liquid.Usually do not need the problem of special concern in the process, but sometimes there are some problems yet, if calcium carbonate blocking is serious, a small amount of hydrochloric acid can be added and reduce calcium carbonate concentration in feed liquor, but pH value remains at more than 7; If certain Heavy Metallic Elements concentration may exceed claimed range in the final product, then should after specific aim experimental study, can in the process by adjust ph to acid range, this heavy metal is mainly in through film under free state, then regulates the pH value of permeate to precipitate removal heavy metal to alkaline range.The permeate of two-stage ultrafiltering system is back to the process of one-level ultrafiltration system, and secondary concentration liquid (pH value is generally 7 ~ 9) flows into submerged combustion evaporation system concentrated (chamber temperature >=750 DEG C further, submergence 0.3 ~ 0.6m, cycles of concentration is 5 ~ 10 times) reach the content requirement of product, general organism weight ratio can reach 14 ~ 20%, simultaneously aromatic hydrocarbons in the process, poisonous or harmful micro-content organism and a small amount of instability the low molecule organic matter etc. that halohydrocarbon etc. may affect product quality on a small quantity can be cleaned, all right all inactivating pathogens, and namely the concentrated solution of vapo(u)rization system can be used as humic acid organic hquid fertnizer substantially.The steam evaporated achieves UTILIZATION OF VESIDUAL HEAT IN, save energy through internal system cooling, and water of condensation is incorporated in the permeate of percolate after one-level ultrafiltration system and enters aftertreatment systems together, and therefore this process for reclaiming does not have secondary pollution.
The process for reclaiming of consumer waste landfill percolate is example, further illustrates the present invention.
This landfill yard brings into operation for 2012, has now entered the methane phase stage, and day produces percolate 200 tons, and water quality is as follows: pH is 7.67 ~ 8.48, COD is 2220 ~ 3520mg/L, BOD
5be 230 ~ 617mg/L, TOC be 841 ~ 1590mg/L, specific conductivity is 18.2 ~ 24.1ms/cm, heavy metal concentration all lower than first discharge standard, color in yellow to sorrel.This percolate directly can be promoted by pump and enter sandfiltration pot and small-sized micro-filtration, remove particle diameter and be greater than the particulate matter such as the mud of more than 1 ~ 10 μm, water outlet enters one-level ultrafiltration system through pump again, the relative molecular weight (MWCO) that retains of ultra-filtration membrane is 1000, and operating pressure difference is 0.4Mpa, and cycles of concentration is 5 times, primary concentration liquid is obtained after membrane sepn, its TOC is 3000 ~ 6000mg/L, and color is dark reddish brown, shows the humic acids containing very high density.Permeate is transparent, colourless, enters percolate aftertreatment systems (being generally made up of biological and materializing strategy system).Afterwards, in primary concentration liquid, first add a certain amount of hydrochloric acid, remove the hydrocarbonate of 50 ~ 80%, this process pH remains on more than 7, and then enter two-stage ultrafiltering system with pump, the relative molecular weight (MWCO) that retains of ultra-filtration membrane is still 1000, and operating pressure difference is 1.0 ~ 1.2Mpa, and cycles of concentration is 4 ~ 5 times, obtain secondary concentration liquid, its TOC is 15000 ~ 20000mg/L, and color is garnet, and permeate is back to the feed-pipe of one-level ultrafiltration system.After two-stage ultrafiltering systematic position is concentrated, secondary concentration liquid flows into submerged combustion evaporation system.This submerged combustion evaporation system utilizes landfill gas to do combustion gas, CH in landfill gas
4content is 53 ~ 66% (volume ratios), chamber temperature>=750 DEG C, submergence 0.3 ~ 0.6m, cycles of concentration is 5 ~ 8 times, in final concentrated solution (i.e. organic liquid fertilizer) after evaporation, TOC is greater than 8% (weight ratio), meets the content requirement of humic acid organic hquid fertnizer to organic carbon.And the steam evaporated can be used to preheated feed liquid, thus at internal system recycle heat, such some vapor is condensed into water, also have part uncooled steam percolate treated up to standard after water outlet spraying cooling, steam water coolant and water of condensation enter percolate aftertreatment systems and handle together.
The percolate of Landfill Stabilization Rate stage before the methane phase stage, COD concentration is high, but usually also hold labile organism containing a large amount of, biodegradability is good, and pH value is lower, and this stage percolate should first through anaerobic biological reactor pre-treatment, organism is fully degraded, and the organism that remnants get off character is more stable substantially, pH value can rise to weakly alkaline in the process, heavy metal because formed precipitation wait act on and concentration in water outlet is reduced further; For the percolate entering the methane phase stage, its abundant anaerobic digestion in landfill yard, basically identical with first through the pretreated percolate of anaerobic biological reactor of water quality.Therefore process for reclaiming of the present invention all can be suitable for the percolate in each stage of landfill yard.
Claims (4)
1. one way of life percolate from garbage filling field reuse method, it is characterized in that, described method comprises the steps: 1) by the percolate after decomposing through anaerobic biological reactor, or enter the percolate of methane phase stage landfill yard, pump into one-level ultrafiltration system, operating pressure difference is 0.3 ~ 0.5Mpa, and cycles of concentration is 5 ~ 10 times, obtains primary concentration liquid after membrane sepn; 2) primary concentration liquid pump is entered two-stage ultrafiltering system, operating pressure difference is 1.0 ~ 1.5Mpa, and cycles of concentration is 4 ~ 5 times, obtains secondary concentration liquid after membrane sepn; 3) allow secondary concentration liquid flow into submerged combustion evaporation system, chamber temperature >=750 DEG C, submergence 0.3 ~ 0.6m, cycles of concentration is 5 ~ 10 times, obtains organic liquid fertilizer after concentrated, purification.
2. landfill percolate reuse method according to claim 1, is characterized in that: the relative molecular weight that retains of described two-stage ultrafiltration system film used is 500 ~ 5000.
3. landfill percolate reuse method according to claim 1, it is characterized in that: when utilizing two-stage ultrafiltering system process primary concentration liquid, add a small amount of hydrochloric acid and reduce calcium carbonate concentration in primary concentration liquid, and remain that pH value is more than 7, to avoid calcium carbonate blockage problem occurs.
4. landfill percolate reuse method according to claim 1, it is characterized in that: when utilizing two-stage ultrafiltering system process primary concentration liquid, regulate the pH value of primary concentration liquid to acid range, to make under in primary concentration liquid, heavy metal element is in free state and through film, the pH value of permeate is regulated to precipitate removal heavy metal to alkaline range again, to ensure that in final organic liquid fertilizer, heavy metal element concentration is in claimed range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310402805.4A CN104418456A (en) | 2013-09-08 | 2013-09-08 | Method for recycling household refuse landfill leachate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310402805.4A CN104418456A (en) | 2013-09-08 | 2013-09-08 | Method for recycling household refuse landfill leachate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104418456A true CN104418456A (en) | 2015-03-18 |
Family
ID=52968679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310402805.4A Pending CN104418456A (en) | 2013-09-08 | 2013-09-08 | Method for recycling household refuse landfill leachate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104418456A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883386A (en) * | 2017-11-07 | 2018-04-06 | 天华化工机械及自动化研究设计院有限公司 | A kind of cornstarch concentration useless slurry recovery torch firing method |
| CN110330179A (en) * | 2019-07-11 | 2019-10-15 | 福州大学 | Couple the advanced treating method of landfill leachate of nanofiltration concentrate humic acid extraction and application |
-
2013
- 2013-09-08 CN CN201310402805.4A patent/CN104418456A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883386A (en) * | 2017-11-07 | 2018-04-06 | 天华化工机械及自动化研究设计院有限公司 | A kind of cornstarch concentration useless slurry recovery torch firing method |
| CN110330179A (en) * | 2019-07-11 | 2019-10-15 | 福州大学 | Couple the advanced treating method of landfill leachate of nanofiltration concentrate humic acid extraction and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1278962C (en) | Resource process for percolation liquid of city life garbage landfill | |
| Shi et al. | Review on treatment technology of salt wastewater in coal chemical industry of China | |
| CN1298640C (en) | Resource process of inflitration liquid | |
| CN110240342B (en) | Device and method for treating landfill leachate in arid and cold regions | |
| US20120315209A1 (en) | Methods and systems for treating water streams | |
| CN204588908U (en) | A kind of New-type refuse vehicle percolation liquid treating system | |
| WO2013169091A1 (en) | Zero discharge treatment system of palm oil mill effluent (pome) | |
| CN104150722A (en) | Treatment process for acrylic fiber waste water | |
| CN101172724A (en) | Method for processing sewage from industrial cycle water | |
| CN113955888A (en) | Integrated treatment system and process for recycling concentrated brine in coking wastewater | |
| CN106746120A (en) | A kind of technique of zero discharge of the biochemical tailrace advanced treatment of Coal Chemical Industry | |
| CN105084651A (en) | Purification treatment and pure-salt recovery process for strong-salt wastewater in coal chemical industry | |
| CN108558101A (en) | Wastewater treatment method | |
| CN113072229A (en) | Full-quantitative treatment method for landfill leachate | |
| CN101376550B (en) | Method for processing process waste water of dimethyl ether preparation by dehydrating methyl alcohol | |
| CN104803542A (en) | Integrated treatment and reuse technology of esterification wastewater | |
| CN105417898A (en) | Method for treating reverse osmosis concentrated water and ultrafiltration back washing water in double-membrane method system | |
| CN104418456A (en) | Method for recycling household refuse landfill leachate | |
| CN104341179A (en) | Recycling method of municipal solid waste landfill leachate | |
| CN104445799B (en) | The treatment process of a kind of high salt, ammonia nitrogen and unmanageable solution of gold smelting plant waste water | |
| CN215102410U (en) | Zero release resource utilization system of flowing back is returned in fracturing | |
| CN105000736A (en) | Process method for nanofiltration concentrated liquor reduction of landfill leachate | |
| CN108545892A (en) | The processing system and processing method of coal-ethylene glycol waste water | |
| CN113754164A (en) | Desulfurization wastewater treatment method and system | |
| CN114105349A (en) | Zero-emission resource utilization system and process method of fracturing flow-back fluid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150318 |