CN111689641A - Full-quantitative treatment method for landfill leachate - Google Patents
Full-quantitative treatment method for landfill leachate Download PDFInfo
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- CN111689641A CN111689641A CN201910188536.3A CN201910188536A CN111689641A CN 111689641 A CN111689641 A CN 111689641A CN 201910188536 A CN201910188536 A CN 201910188536A CN 111689641 A CN111689641 A CN 111689641A
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- 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
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- 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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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- 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
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- 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
- C02F3/30—Aerobic and anaerobic processes
Abstract
In order to solve the problem that the conventional treatment mode of the landfill leachate cannot be completely treated, the invention provides a full-quantification treatment method of the landfill leachate, which comprises the following operation steps: resin adsorption separation: adsorbing the garbage leachate with macromolecular organic matters through resin to obtain permeate liquid subjected to resin adsorption treatment; and (3) analysis: resolving the resin subjected to adsorption treatment by using alkali liquor to obtain a macromolecular organic matter concentrated solution; high-temperature oxidation: and carrying out high-temperature oxidation treatment on the macromolecular organic matter concentrated solution to oxidize organic matters in the macromolecular organic matter concentrated solution. The full-quantization treatment method for the landfill leachate provided by the invention can realize full-quantization treatment, no pollutant recharge is generated, the treatment cost is effectively reduced, and the materials entering the high-temperature wet catalytic oxidation device do not contain scaling salt, so that the influence of high-hardness water quality in the landfill leachate on the operation stability of the high-temperature wet catalytic oxidation device is avoided.
Description
Technical Field
The invention belongs to the field of sewage environment-friendly treatment, and particularly relates to a full-quantitative treatment method for landfill leachate.
Background
The landfill leachate is toxic and harmful municipal high-concentration high-pollution wastewater which is mainly produced in a refuse transfer station/a refuse landfill/a refuse incineration plant, the damage to the ecological environment caused by direct discharge is large, and the national landfill leachate output exceeds 200 million tons every year, so that the market value and the social benefit of developing a new technology and a new technology for the landfill leachate are very important.
The existing landfill leachate treatment technology is divided into two types according to the route: one is the biochemical membrane separation and purification technology. The technology is to separate the landfill leachate through an anaerobic membrane, a nitrification membrane, a denitrification membrane, a nanofiltration membrane and a reverse osmosis membrane, and finally the landfill leachate meets the discharge requirement. The other is a pure membrane process, namely, the landfill leachate stock solution is separated by a high anti-pollution reverse osmosis filter membrane (a disc reverse osmosis membrane or a roll reverse osmosis filter membrane) to directly obtain membrane produced water meeting the discharge requirement. The former method is suitable for landfill leachate in a wide range, but the technological process is quite complex, the operation is unstable, and the treatment cost is high. The latter method is suitable for treating landfill leachate with medium and low pollutant concentration, the process is simple, the membrane surface is easy to pollute, frequent cleaning is needed, and the membrane performance attenuation is large along with the time, so that the proportion of clean water produced by the membrane system is reduced. No matter which process is involved, membrane treatment is involved, membrane concentrated solution formed by intercepting organic matters on the surface of a membrane is generated, the output proportion accounts for 10% -40% of the feeding amount, and the output proportion of the membrane concentrated solution is larger and larger along with the time, the treatment of the membrane concentrated solution at the present stage is a technical problem, the method of recharging the refuse landfill is adopted commonly, the concentration of pollutants in the refuse landfill is enriched by the method, the discharge concentration of the pollutants in the refuse landfill exceeds the design upper limit and exceeds the treatment load of a refuse leachate treatment device configured originally, the treated water quality is unqualified or the treatment capacity of the device cannot be balanced, and full-quantization treatment cannot be realized.
Disclosure of Invention
Aiming at the problem that the existing treatment mode of the landfill leachate cannot be treated in a full-quantification mode, the invention provides the full-quantification treatment method of the landfill leachate, which can realize the full-quantification treatment of the landfill leachate with lower operation cost and thoroughly eliminate the defect that a part of landfill sites need to be refilled in the process of treating the landfill leachate.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides a full-quantitative treatment method of landfill leachate, which comprises the following operation steps:
resin adsorption separation: adsorbing the garbage leachate with macromolecular organic matters through resin to obtain permeate liquid subjected to resin adsorption treatment;
and (3) analysis: resolving the resin subjected to adsorption treatment by using alkali liquor to obtain a macromolecular organic matter concentrated solution;
high-temperature oxidation: and carrying out high-temperature oxidation treatment on the macromolecular organic matter concentrated solution to oxidize and remove the organic matters in the macromolecular organic matter concentrated solution.
According to the garbage leachate full-quantification treatment method provided by the invention, macromolecular organic matters in the garbage leachate are enriched by a resin adsorption separation technology, a macromolecular organic matter concentrated solution is obtained by resolution and removal, most organic matters in the macromolecular organic matter concentrated solution are degraded by high-temperature oxidation treatment and oxidized into carbon dioxide to be removed, and the residual micromolecular pollutants are ensured to have good biochemical degradation capability, the resin separation permeate liquid and the micromolecular pollutants formed by high-temperature oxidation of the macromolecular pollutants are degraded and removed by a cheap biochemical process, the comprehensive treatment cost is low by the process route, about 30% of the traditional biochemical + membrane process, the comprehensive investment cost is only 50% of the traditional biochemical + membrane process, more importantly, the process route can realize full-quantification treatment, no pollution liquid residue is generated, the treatment cost is effectively reduced, and the treatment effect is improved.
Optionally, the operation of "resin adsorption separation" further comprises:
and carrying out hydrolytic acidification on the landfill leachate, and then carrying out anaerobic pretreatment.
Optionally, in the operation of "resin adsorption separation", styrene macroporous resin is adopted for adsorption.
Optionally, the "high temperature oxidation" operation includes:
and spraying the macromolecular organic matter concentrated solution into a waste incinerator for dry incineration removal.
Optionally, the "high temperature oxidation" operation includes:
and carrying out high-temperature wet catalytic oxidation treatment on the macromolecular organic matter concentrated solution to degrade and oxidize most of organic matters.
Optionally, the oxidant for the high-temperature wet catalytic oxidation treatment is compressed air or high-pressure oxygen, the oxidation temperature is 180-280 ℃, and the pressure is 2.0-8.0 Mpa.
Optionally, the feed liquid after the high-temperature wet catalytic oxidation treatment is mixed with the permeate liquid after the resin adsorption treatment, the pH value is adjusted to 10-12, and the feed liquid is filtered to remove insoluble substances.
Optionally, the filtered feed liquid is introduced into deamination equipment, and air or steam is used for blowing to remove deamination.
Optionally, the pH value of the feed liquid subjected to stripping deamination treatment is adjusted to 7-8, the feed liquid is introduced into anaerobic equipment for biochemical anaerobic fermentation, and then the feed liquid subjected to fermentation treatment is subjected to aerobic aeration biochemical treatment.
Optionally, the feed liquid after the aerobic aeration biochemical treatment is subjected to supplementary oxidation treatment by using a chemical oxidant, wherein the chemical oxidant comprises one or more of sodium hypochlorite and calcium hypochlorite.
Drawings
Fig. 1 is a process flow diagram of the landfill leachate full-scale treatment method provided by the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, an embodiment of the present invention provides a full-scale treatment method for landfill leachate, including the following operation steps:
resin adsorption separation: adsorbing the garbage leachate with macromolecular organic matters through resin to obtain permeate liquid subjected to resin adsorption treatment;
and (3) analysis: resolving the resin subjected to adsorption treatment by using alkali liquor to obtain a macromolecular organic matter concentrated solution;
high-temperature oxidation: and carrying out high-temperature oxidation treatment on the macromolecular organic matter concentrated solution to oxidize and remove the organic matters in the macromolecular organic matter concentrated solution.
This landfill leachate full-quantization processing method passes through the resin adsorption separation technique and enriches the macromolecule organic matter in with landfill leachate, for traditional membrane separation, its concentration efficiency promotes more than 5 times, obtains macromolecule organic matter concentrate through the analytic desorption again, to possessing the condition of burning, can take the above-mentioned macromolecule organic matter concentrate of direct burning. For the organic matters which do not have the incineration condition and are treated by configuring high-temperature wet catalytic oxidation equipment, most of the organic matters in the macromolecular organic matter concentrated solution are degraded and oxidized into carbon dioxide to be removed, and ensures that the residual micromolecule pollutants have good biochemical degradation characteristics, the resin separation permeate liquid and the micromolecule pollutants (oxidation chemical fragments) formed after the macromolecular pollutants are oxidized at high temperature are combined and degraded and removed by adopting a cheap biochemical process, through the process route, the comprehensive treatment cost is low, about 30 percent of the traditional biochemical and membrane process, the comprehensive investment cost is only 50 percent of the traditional biochemical and membrane process, more importantly, the process route can realize full-scale treatment, no pollutant liquid residue is generated, and the secondary problem caused by the fact that the conventional landfill leachate treatment process can not avoid generating a large amount of pollutants to recharge a landfill site is effectively solved.
In one embodiment, the "resin adsorption separation" operation further comprises:
and carrying out hydrolytic acidification on the landfill leachate, and then carrying out anaerobic pretreatment.
The degradable pollutants of the garbage leachate are derived from oil/protein produced in daily life and humic acid produced by microbial fermentation in the garbage, the pollutants have certain biochemical degradation capability, and are preferably pretreated by adopting a hydrolytic acidification and anaerobic fermentation process, so that the easily biodegradable part is degraded by using a low-cost simple process, the pollutant concentration of the material is reduced, good material conditions are established for subsequent treatment, and the investment and the operation cost of subsequent treatment procedures are reduced.
Anaerobic pretreatment adopts the USAB technology (upflow anaerobic sludge bed method) or suspension ball liquid bag type anaerobic fermentation technology, feed liquid dwell time is 1 ~ 8 days in the anaerobic pretreatment, and dwell time is decided according to the original concentration of degradable pollutant in the feed liquid, and the feed liquid color through anaerobic pretreatment becomes light, through the dwell time of control feed liquid with the COD control of feed liquid below 5000 mg/L.
In another embodiment, the "resin adsorption separation" operation further comprises:
and (3) performing membrane filtration pretreatment on the landfill leachate.
If the landfill leachate is subjected to membrane filtration pretreatment, the hydrolysis acidification operation and the anaerobic pretreatment operation can be cancelled, and the landfill leachate directly enters resin adsorption separation operation after the membrane filtration pretreatment.
In some embodiments, the "resin adsorption separation" operation employs a styrene macroporous resin for adsorption.
Introducing landfill leachate after anaerobic pretreatment into a DL-type large-aperture high-crosslinking-degree polystyrene resin adsorption tower, wherein the styrene macroporous resin has a strong adsorption effect on macromolecular organic matters in feed liquid, so that an enrichment effect is formed on the macromolecular organic matters, and the macromolecular organic matters on the styrene macroporous resin can be eluted under the action of a 2-10% sodium hydroxide aqueous solution to obtain a macromolecular organic matter concentrated solution.
The full-quantitative treatment method of the landfill leachate is suitable for treating the landfill leachate of a landfill site and is also suitable for treating the landfill leachate of a waste incineration plant.
In one embodiment, when the method for fully treating landfill leachate is applied to landfill leachate treatment in a waste incineration plant, the operation of "high temperature oxidation" includes:
and spraying the macromolecular organic matter concentrated solution into a waste incinerator for dry incineration removal.
Because contain a large amount of macromolecule organic matters in the macromolecule organic matter concentrate, can degrade through the mode of burning, can produce a large amount of heats in the combustion process to offset the heat that the evaporation of water took away in some macromolecule organic matter concentrate.
In another embodiment, the "high temperature oxidation" operation comprises:
and carrying out high-temperature wet catalytic oxidation treatment on the macromolecular organic matter concentrated solution to degrade and oxidize most of organic matters.
The macromolecular organic matter can take place quick catalytic oxidation effect with the oxidant under high temperature and high pressure, and the macromolecular organic matter takes place the degradation effect in this in-process material, and most thoroughly mineralizes into carbon dioxide. The COD of the material is reduced by more than 80 percent, the biodegradability is improved by more than 3 times, and more than 90 percent of organic nitrogen in the material is converted into ammonia nitrogen.
The resin adsorption separation and the high-temperature wet catalytic oxidation treatment are combined, inorganic salt in the landfill leachate is not intercepted by the resin adsorption separation at the front section, the separation of inorganic matters and organic matters is realized, macromolecular organic matter concentrated solution entering the high-temperature wet oxidation device does not contain scaling salt, the influence of high-hardness water quality in the landfill leachate on the operation of the high-temperature wet oxidation device is avoided, the material is alkaline and salt-free, the requirement on the material of the high-temperature wet oxidation device is lower, and the manufacturing cost of the high-temperature wet oxidation device is greatly reduced.
In some embodiments, the oxidant for the high-temperature wet catalytic oxidation treatment is compressed air or high-pressure oxygen, the oxidation temperature is 180-280 ℃, and the pressure is 2.0-8.0 Mpa. Thermal oxidation liquid obtained by high-temperature wet catalytic oxidation is stored in a container in a heat preservation manner, so that subsequent ammonia nitrogen removal is facilitated.
In some embodiments, the feed liquid after the high-temperature wet catalytic oxidation treatment is mixed with the permeate liquid after the resin adsorption treatment, the pH value of the feed liquid is detected, sodium carbonate is added to adjust the pH value to 10-12, a small amount of divalent and above metal ions in the feed liquid are separated out in the form of insoluble hydroxide, the feed liquid is filtered to remove the insoluble substances, and the obtained insoluble substances are buried.
The operation of this regulation pH value can effectively reduce the content of metal ion in the feed liquid, and the ammonia nitrogen that high temperature wet-type catalytic oxidation produced exists mainly with the form of ammonium ion simultaneously, adds alkali and can form the ammonia gas that dissolves in the feed liquid, does benefit to subsequent stripping deamination.
In some embodiments, the filtered feed solution is introduced into a deamination apparatus and deamination is performed by air or steam stripping.
A large amount of aeration promotes ammonia gas to be transferred from a liquid phase to a gas phase to be taken away, thereby achieving the purpose of removing most of inorganic ammonia nitrogen.
Controlling the ammonia nitrogen content of the feed liquid after stripping to be below 50mg/L, and absorbing the gas after stripping by using water or dilute sulfuric acid to obtain ammonia water or an ammonium sulfate solution.
In some embodiments, the pH of the feed liquid after the stripping deamination treatment is adjusted to 7-8, specifically, the pH can be adjusted by adding dilute hydrochloric acid, the feed liquid is introduced into an anaerobic device for biochemical anaerobic fermentation, the biochemical anaerobic fermentation adopts short-range biochemical treatment, the retention time of the feed liquid is 12-24 h, after the anaerobic fermentation of the feed liquid, the fermented feed liquid is subjected to aerobic aeration biochemical treatment, specifically, traditional suspended elastic filler or suspended ball biological filler is adopted, preferably, BAF (biological filter) process is adopted for short-range aerobic biochemical treatment, and simultaneously, sludge and water are separated, and the retention time of the feed liquid is 12-24 h.
After aerobic aeration biochemical treatment, the feed liquid is subjected to water quality detection, if the water quality reaches the discharge standard, the feed liquid can be directly discharged, and if the water quality does not reach the discharge standard, supplementary oxidation treatment is required.
In some embodiments, the feed liquid after the aerobic aeration biochemical treatment is subjected to supplementary oxidation treatment by using a chemical oxidant, wherein the chemical oxidant can oxidize organic matters remained in the feed liquid to reduce COD (chemical oxygen demand) of the feed liquid, and the chemical oxidant comprises one or more of sodium hypochlorite and calcium hypochlorite.
The present invention will be further illustrated by the following examples.
Example 1
Landfill leachate is produced in a certain initially-built landfill site in south, 100 tons of landfill leachate are treated every day, and the typical water quality of the landfill leachate is as follows: COD is 4580mg/L, ammonia nitrogen is 825mg/L, total salt is 6590mg/L, and the appearance is black and foul.
Hydrolyzing and acidifying for 8h, performing anaerobic pretreatment, wherein the anaerobic fermentation time is 48h, the COD of the anaerobic fermentation effluent is 1865mg/L, the ammonia nitrogen is 765mg/L, the effluent is subjected to resin adsorption separation treatment, the separation concentration multiple is 25 times, the obtained macromolecular organic matter concentrated solution is 3.4 tons/day, the COD of the macromolecular organic matter concentrated solution is 43298mg/L, the resin adsorption permeate solution COD is 575mg/L, the ammonia nitrogen is 543mg/L, the COD of the macromolecular organic matter concentrated solution is reduced to 6031mg/L after high-temperature wet catalytic oxidation degradation treatment, the feed liquid subjected to high-temperature wet catalytic oxidation is mixed with the resin adsorption permeate solution, the ammonia nitrogen mixed solution is 46mg/L after deamination, the COD mixed solution is 734mg/L, the COD is only 221mg/L after 12h anaerobic fermentation, the COD is subjected to 12h BAF aerobic aeration biochemical treatment and is 62mg/L, and the ammonia nitrogen is 12mg/L, the emission requirement is met.
Example 2
Landfill leachate is produced from medium-age landfill sites 6 years old in certain construction period in south, 150 tons of landfill leachate are treated every day, and the typical water quality of the landfill leachate is as follows: COD7882mg/L, ammonia nitrogen 1251mg/L, total salt 7890mg/L, black and odorous appearance.
Firstly, hydrolyzing and acidifying for 8h, then performing anaerobic pretreatment, wherein the anaerobic fermentation time is 48h, the COD of anaerobic fermentation effluent is 3321mg/L, the ammonia nitrogen is 1210mg/L, the effluent is subjected to resin adsorption separation treatment, the separation concentration multiple is 15 times, 6 tons/day of macromolecular organic matter concentrated solution is obtained, the COD of the macromolecular organic matter concentrated solution is 41876mg/L, 779mg/L of resin adsorption permeate COD and 1056mg/L of ammonia nitrogen are obtained, after the macromolecular organic matter concentrated solution is subjected to high-temperature wet catalytic oxidation degradation treatment, the COD is reduced to 6176mg/L, feed liquid subjected to high-temperature wet catalytic oxidation is mixed with the resin adsorption permeate, the ammonia nitrogen is 48mg/L after deamination of mixed liquid, 1267mg/L of mixed liquid is subjected to 12h anaerobic fermentation, the COD is only 481mg/L, and the COD is 96mg/L after 12h BAF aerobic aeration biochemical treatment, the ammonia nitrogen is 21mg/L, and the discharge requirement is met.
Example 3
Landfill leachate is produced from old landfill sites with 9 years of operation period in the north, 200 tons of landfill leachate are treated every day, and the typical water quality of the landfill leachate is as follows: 10386mg/L of COD, 1652mg/L of ammonia nitrogen, 8670mg/L of total salt and black and stink appearance.
Firstly, hydrolyzing and acidifying for 8h, then performing anaerobic pretreatment, wherein the anaerobic fermentation time is 60h, the COD of anaerobic fermentation effluent is 4835mg/L, ammonia nitrogen is 1539mg/L, the effluent is subjected to resin adsorption separation treatment, the separation concentration multiple is 12 times, 13 tons/day of macromolecular organic matter concentrated solution is obtained, the COD of the macromolecular organic matter concentrated solution is 58569mg/L, the COD of resin adsorption permeate solution is 1015mg/L, and the ammonia nitrogen is 1429mg/L, the COD of the macromolecular organic matter concentrated solution is reduced to 9211mg/L after high-temperature wet catalytic oxidation degradation treatment, the feed liquid after high-temperature wet catalytic oxidation is mixed with the resin adsorption permeate solution, the ammonia nitrogen of the mixed liquid is 42mg/L after deamination, the COD of the mixed liquid is 1521mg/L, the COD of the mixed liquid is 782mg/L after 12h anaerobic fermentation, and the COD of the mixed liquid is 137mg/L after 12h, 38mg/L of ammonia nitrogen can not meet the discharge requirement, the advanced treatment is needed to be supplemented, after 5kg of sodium hypochlorite oxidant is added into each ton of water for treatment, the COD is reduced to 92mg/L, and the ammonia nitrogen is reduced to 22mg/L, so that the discharge water quality requirement is met.
From the above, the adoption of the full-quantization treatment method for the landfill leachate provided by the invention can effectively reduce the COD and ammonia nitrogen content in the landfill leachate.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A full-quantitative treatment method for landfill leachate is characterized by comprising the following operation steps:
resin adsorption separation: adsorbing the garbage leachate with macromolecular organic matters through resin to obtain permeate liquid subjected to resin adsorption treatment;
and (3) analysis: resolving the resin subjected to adsorption treatment by using alkali liquor to obtain a macromolecular organic matter concentrated solution;
high-temperature oxidation: and carrying out high-temperature oxidation treatment on the macromolecular organic matter concentrated solution to oxidize and remove the organic matters in the macromolecular organic matter concentrated solution.
2. The method for the full-scale treatment of landfill leachate according to claim 1, wherein the operation of "resin adsorption separation" further comprises:
and carrying out hydrolytic acidification on the landfill leachate, and then carrying out anaerobic pretreatment.
3. The method for the full-scale treatment of landfill leachate according to claim 1, wherein in the operation of "resin adsorption separation", styrene macroporous resin is used for adsorption.
4. The method for the full-scale treatment of landfill leachate according to claim 1, wherein the "high temperature oxidation" operation comprises:
and spraying the macromolecular organic matter concentrated solution into a waste incinerator for dry incineration removal.
5. The method for the full-scale treatment of landfill leachate according to claim 1, wherein the "high temperature oxidation" operation comprises:
and carrying out high-temperature wet catalytic oxidation treatment on the macromolecular organic matter concentrated solution to degrade and oxidize most of organic matters.
6. The method for the full-scale treatment of landfill leachate according to claim 5, wherein the oxidant for the high temperature wet catalytic oxidation treatment is compressed air or high pressure oxygen, the oxidation temperature is 180 ℃ to 280 ℃, and the pressure is 2.0MPa to 8.0 MPa.
7. The method for the full-scale treatment of landfill leachate according to claim 5, wherein the feed liquid after the high temperature wet catalytic oxidation treatment is mixed with the permeate liquid after the resin adsorption treatment, the pH value is adjusted to 10-12, and the feed liquid is filtered to remove insoluble substances.
8. The method for the full-scale treatment of landfill leachate according to claim 7, wherein the filtered feed liquid is introduced into a deamination device and is subjected to air or steam stripping deamination.
9. The method for the total quantitative treatment of the landfill leachate according to claim 8, wherein the pH value of the feed liquid after the stripping deamination treatment is adjusted to 7-8, the feed liquid is introduced into anaerobic equipment for biochemical anaerobic fermentation, and then the feed liquid after the fermentation treatment is subjected to aerobic aeration biochemical treatment.
10. The method for the full-scale treatment of landfill leachate according to claim 9, wherein the feed liquid after the aerobic aeration biochemical treatment is subjected to supplementary oxidation treatment by using a chemical oxidant, wherein the chemical oxidant comprises one or more of sodium hypochlorite and calcium hypochlorite.
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| CN113860668A (en) * | 2021-11-09 | 2021-12-31 | 中科国发(深圳)技术有限公司 | Culture manure purification method |
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Application publication date: 20200922 |