CN105293771A - Rubbish penetrating fluid treatment method - Google Patents
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- CN105293771A CN105293771A CN201510762890.4A CN201510762890A CN105293771A CN 105293771 A CN105293771 A CN 105293771A CN 201510762890 A CN201510762890 A CN 201510762890A CN 105293771 A CN105293771 A CN 105293771A
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Abstract
The invention provides a rubbish penetrating fluid treatment method. The rubbish penetrating fluid treatment method comprises flocculent settling treatment, Fenton oxidation treatment and activated carbon adsorption treatment which are performed in sequence. First in the flocculent settling treatment step, by combined use of a decolorizing agent, PAC and PAM, the very good decolorizing effect is achieved, the chromaticity can be reduced by at least two orders of magnitude, and CODs, BODs and heavy metal ions such as arsenite, lead and mercury in water can be removed effectively. Next, organic pollutants difficult to degrade can be removed more effectively through Fenton oxidation under the acidic conditions. Finally, adsorption is performed by utilizing activated carbon. Therefore, the rubbish penetrating fluid treatment method is low in cost, high in effect and simple to operate and saves manpower and material resources. Moreover, the treatment degree is high, the effect is stable, the penetrating fluid chromaticity, CODs, BODs, the heavy metal content and ammonia nitrogen of rubbish treated through the method reach the emission standard.
Description
Technical field
The present invention relates to refuse leachate processing technology field, particularly relate to a kind of refuse leachate treatment process.
Background technology
Refuse leachate is rubbish in stacking and landfill process due to fermentation, rain drop erosion and surface water, underground water immersion and ooze sewage caught on a filter.Penetrating fluid is a kind of high concentrated organic wastewater of complicated component, its character depends on the factors such as the particle diameter of component of refuse, rubbish, compaction, on-the-spot weather, hydrologic condition and landfill time, in general there is water quality complicated, hazardness is large, CODcr and BOD5 concentration is high, ammonia-nitrogen content is high, and change of water quality is large, metal content high.China's major part city is using sanitary landfill as the basic mode of refuse treatment, and in one period from now on, sanitary landfill process will be the basic mode of domestic city domestic rubbish disposal.Sanitary landfill, as current modal waste disposal method, also also exists many pollution problems, a large amount of refuse leachates particularly produced in landfill process, if do not dealt carefully with, can cause severe contamination to the water body of surrounding and soil.
The treatment process of refuse leachate comprises physico-chemical processes and biological process.Physico-chemical processes mainly contains the multiple methods such as charcoal absorption, chemical precipitation, density separation, chemical oxidation, chemical reduction, ion-exchange, film dialysis, air lift and wet oxidation process, when COD is 2000 ~ 4000mg/L, the COD clearance of physical chemistry method can reach 50% ~ 87%.Compare with biological treatment, materializing strategy is not by the impact of water quality and quantity variation, and effluent quality is more stable, especially BOD5/COD ratio lower (0.07 ~ 0.20) is difficult to the refuse leachate of carrying out a biological disposal upon, has good treatment effect.But physical chemistry method processing cost is higher, be unsuitable for the process of big yield refuse leachate, and the general sludge yield of biological process is large, BODs load is low, and the treatment time is long, and efficiency is not high.
Therefore, current refuse leachate treatment process is that above-mentioned various physico-chemical process and biological process are carried out different combinations to reach good treatment effect mostly, but combination is often very complicated, and technical process is many, cause water producing cost high on the contrary, complicated operation, wastes time and energy.
Summary of the invention
For above-mentioned defect and the problem of prior art, the object of the embodiment of the present invention is to provide a kind of refuse leachate treatment process, solves the treatment process complex process of conventional garbage penetrating fluid, causes water producing cost high, complicated operation, the technical problem wasted time and energy.
In order to achieve the above object, the invention provides following technical scheme:
A kind of refuse leachate treatment process, comprises the following steps:
Step one, flocculation sediment process: refuse leachate is sent into flocculation sedimentation tank, then in refuse leachate, add discoloring agent successively, polymerize aluminum chloride (PAC) and polyacrylamide (PAM), after being uniformly mixed, leave standstill, get supernatant liquor I;
Step 2, Fenton oxidation process: the pH value of the supernatant liquor I step one obtained is adjusted to 2 ~ 4; And then hydrogen peroxide and ferric sulfate is added in supernatant liquor, be uniformly mixed reaction, then leave standstill, get supernatant liquor II;
Step 3, charcoal absorption process: the pH value of the supernatant liquor II step 2 obtained is adjusted to neutrality, then send into active carbon filler pond and carry out charcoal absorption, leave standstill, then water outlet is discharged;
Complete refuse leachate process.
Further, in step one, described discoloring agent adopts and is mixed with massfraction is that the form of the quaternary amine type cationic polymeric compound solution of 2% ~ 3% adds in refuse leachate, controls to add that volume is refuse leachate volume 2% ~ 4%.
Preferably, described discoloring agent adopts and is mixed with massfraction is that the form of the quaternary amine type cationic polymeric compound solution of 2% adds in refuse leachate, controls to add that volume is refuse leachate volume 3%.
Further, in step one, described polymerize aluminum chloride adopts and is mixed with concentration is that the form of the polymeric aluminum chlorides solution of 15g/L ~ 25g/L adds in refuse leachate; Control add that volume is refuse leachate volume 1% ~ 3%.
Preferably, described polymerize aluminum chloride adopts and is mixed with concentration is that the form of the polymeric aluminum chlorides solution of 20g/L adds in refuse leachate; Control add that volume is refuse leachate volume 2%.
Further, in step one, described polyacrylamide adopts and is mixed with massfraction is that the form of the polyacrylamide solution of 0.1% adds in refuse leachate, controls to add that volume is refuse leachate volume 0.5% ~ 2%.Preferably, add that volume is refuse leachate volume 1% is controlled.
Further, in step one, described flocculation sedimentation tank adopts rectangular sedimentation tank, and to control mean flow rate in settling tank be 10 ~ 50mm/s.Be preferably 10 ~ 25mm/s.
Further, in step one, time of repose is fixed according to the amount of refuse leachate.As, leave standstill 1 hour.
Further, in step 2, the pH value of the supernatant liquor I adopting sulfuric acid step one to be obtained is adjusted to 3.
Further, in step 2, described hydrogen peroxide adopts massfraction to be the hydrogen peroxide solution of 30%, controls add that volume is refuse leachate volume in step one 0.5% ~ 2% of hydrogen peroxide solution.
Preferably, add that volume is refuse leachate volume in step one 1% of hydrogen peroxide solution is controlled.
Further, in step 2, described ferric sulfate is the FeSO of 40 ~ 60g/L with concentration
47H
2the form of the O aqueous solution adds, control FeSO
47H
2add that volume is refuse leachate volume in step one 0.5% ~ 2% of the O aqueous solution.
Preferably, described ferric sulfate take concentration as the FeSO of 50g/L
47H
2the form of the O aqueous solution adds, control FeSO
47H
2add that volume is refuse leachate volume in step one 1% of the O aqueous solution.
Further, in step 2, time of repose is fixed according to the amount of the supernatant liquor I of process.As, leave standstill 2 hours.
Further, in step 3, the volume ratio controlling refuse leachate in quality of activated carbon and step one in active carbon filler pond is 2 ~ 5g ﹕ 1L.Be preferably, 3g ﹕ 1L.
Further, in step 3, time of repose is fixed according to the amount of the supernatant liquor II of process.As, leave standstill 2 hours.
Refuse leachate treatment process of the present invention only include carry out in turn flocculation sediment process, Fenton oxidation process and charcoal absorption process three steps, first, in flocculation sediment treatment step, utilize being combined of discoloring agent, PAC and PAM, there is good decolorizing effect, colourity can be reduced at least 2 orders of magnitude, effectively can remove the heavy metal ion such as COD, BOD and arsenic, lead, mercury in water simultaneously.Especially, when adopting quaternary amine type cationic polymeric compound to be discoloring agent, coordinate PAC and PAM, decolorizing effect is better.Next, Fenton oxidation process carries out in acid condition, and the Fenton oxidation under acidic conditions more effectively can remove the organic pollutant of difficult degradation.Gac is finally utilized to adsorb.
Therefore, refuse leachate treatment process water producing cost of the present invention is low, and effect is large, simple to operate, saves human and material resources.And degree for the treatment of is high, effect stability, through the refuse leachate colourity handled by the present invention, COD, BODs, heavy metal content and ammonia nitrogen all reach emission standard.
Embodiment
Below in conjunction with embodiments of the invention, be clearly and completely described technical scheme of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
A kind of refuse leachate treatment process, comprises the following steps:
Step one, flocculation sediment process: 1000L refuse leachate is sent into flocculation sedimentation tank, described flocculation sedimentation tank adopts rectangular sedimentation tank, and to control mean flow rate in settling tank be 25 ~ 50mm/s; Then in refuse leachate, add 30L massfraction is successively that the quaternary amine type cationic polymeric compound solution of 2% is as discoloring agent, 20L concentration is the polymeric aluminum chlorides solution of 20g/L and 10L massfraction is the polyacrylamide solution of 0.1%, fully be uniformly mixed, leave standstill 1 hour.
Step 2, Fenton oxidation process: Fenton pond sent into by the supernatant liquor I obtained after step one being left standstill, and then in supernatant liquor I, adds sulfuric acid, the pH value of supernatant liquor I is adjusted to 3; And then add successively 10L massfraction be 30% hydrogen peroxide solution and 10L concentration be the FeSO of 50g/L
47H
2the O aqueous solution, is fully uniformly mixed reaction, then leaves standstill 2 hours.
Step 3, charcoal absorption process: the acid-basicity of the supernatant liquor II obtained after leaving standstill according to step 2, sulfuric acid or sodium hydroxide is added in supernatant liquor II, the pH value of supernatant liquor II is adjusted to neutrality, then send into active carbon filler pond and carry out charcoal absorption, 3kg gac is loaded in active carbon filler pond, fully be uniformly mixed, then leave standstill 2 hours, can water outlet discharge.Complete refuse leachate process.
Carried out water quality detection to refuse leachate stoste untreated in step one and the water outlet after step 3 process in embodiment 1, shown in concrete employing municipal effluent water examination method standard CJ/T51-2004, method detects, and detected result is as shown in table 1 below.
Table 1
Analyze known, the refuse leachate disposal methods degree of the embodiment of the present invention 1 is high, effective, the refuse leachate colourity after process, and COD, BODs, heavy metal content and ammonia nitrogen all reach emission standard.
Embodiment 2
A kind of refuse leachate treatment process, comprises the following steps:
Step one, flocculation sediment process: 2000L refuse leachate is sent into flocculation sedimentation tank, described flocculation sedimentation tank adopts rectangular sedimentation tank, and to control mean flow rate in settling tank be 10 ~ 25mm/s; Then in refuse leachate, add 60L massfraction is successively that the quaternary amine type cationic polymeric compound solution of 2% is as discoloring agent, 40L concentration is the polymeric aluminum chlorides solution of 40g/L and 20L massfraction is the polyacrylamide solution of 0.1%, fully be uniformly mixed, leave standstill 1 hour.
Step 2, Fenton oxidation process: Fenton pond sent into by the supernatant liquor I obtained after step one being left standstill, and then in supernatant liquor I, adds sulfuric acid, the pH value of supernatant liquor I is adjusted to 3; And then add successively 20L massfraction be 30% hydrogen peroxide solution and 20L concentration be the FeSO of 50g/L
47H
2the O aqueous solution, is fully uniformly mixed reaction, then leaves standstill 2 hours.
Step 3, charcoal absorption process: the acid-basicity of the supernatant liquor II obtained after leaving standstill according to step 2, sulfuric acid or sodium hydroxide is added in supernatant liquor II, the pH value of supernatant liquor II is adjusted to neutrality, then send into active carbon filler pond and carry out charcoal absorption, 6Kg gac is loaded in active carbon filler pond, fully be uniformly mixed, then leave standstill 2 hours, can water outlet discharge.Complete refuse leachate process.
Carried out water quality detection to refuse leachate stoste untreated in step one and the water outlet after step 3 process in embodiment 2, shown in concrete employing municipal effluent water examination method standard CJ/T51-2004, method detects, and detected result is as shown in table 2 below.
Table 2
Analyze known, the refuse leachate disposal methods degree of the embodiment of the present invention 2 is high, effective, the refuse leachate colourity after process, and COD, BODs, heavy metal content and ammonia nitrogen all reach emission standard.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection domain of claim.
Claims (10)
1. a refuse leachate treatment process, is characterized in that, comprises the following steps:
Step one, flocculation sediment process: refuse leachate is sent into flocculation sedimentation tank, then add discoloring agent successively in refuse leachate, polymerize aluminum chloride and polyacrylamide, after being uniformly mixed, leaving standstill, get supernatant liquor I;
Step 2, Fenton oxidation process: the pH value of the supernatant liquor I step one obtained is adjusted to 2 ~ 4; And then hydrogen peroxide and ferric sulfate is added in supernatant liquor, be uniformly mixed reaction, then leave standstill, get supernatant liquor II;
Step 3, charcoal absorption process: the pH value of the supernatant liquor II step 2 obtained is adjusted to neutrality, then send into active carbon filler pond and carry out charcoal absorption, leave standstill, then water outlet is discharged;
Complete refuse leachate process.
2. a kind of refuse leachate treatment process according to claim 1, it is characterized in that, in step, described discoloring agent adopts and is mixed with massfraction is that the form of the quaternary amine type cationic polymeric compound solution of 2% ~ 3% adds in refuse leachate, controls to add that volume is refuse leachate volume 2% ~ 4%.
3. a kind of refuse leachate treatment process according to claim 2, it is characterized in that, described discoloring agent adopts and is mixed with massfraction is that the form of the quaternary amine type cationic polymeric compound solution of 2% adds in refuse leachate, controls to add that volume is refuse leachate volume 3%.
4. a kind of refuse leachate treatment process according to claim 1, is characterized in that, in step one, described polymerize aluminum chloride adopts and is mixed with concentration is that the form of the polymeric aluminum chlorides solution of 15g/L ~ 25g/L adds in refuse leachate; Control add that volume is refuse leachate volume 1% ~ 3%.
5. a kind of refuse leachate treatment process according to claim 4, is characterized in that, described polymerize aluminum chloride adopts and is mixed with concentration is that the form of the polymeric aluminum chlorides solution of 20g/L adds in refuse leachate; Control add that volume is refuse leachate volume 2%.
6. a kind of refuse leachate treatment process according to claim 1, it is characterized in that, in step, described polyacrylamide adopts and is mixed with massfraction is that the form of the polyacrylamide solution of 0.1% adds in refuse leachate, controls to add that volume is refuse leachate volume 0.5% ~ 2%.
7. a kind of refuse leachate treatment process according to any one of claim 1 to 6, is characterized in that, in step one, described flocculation sedimentation tank adopts rectangular sedimentation tank, and to control mean flow rate in settling tank be 10 ~ 50mm/s.
8. a kind of refuse leachate treatment process according to any one of claim 1 to 6, it is characterized in that, in rapid two, described hydrogen peroxide adopts massfraction to be the hydrogen peroxide solution of 30%, controls add that volume is refuse leachate volume in step one 0.5% ~ 2% of hydrogen peroxide solution.
9. a kind of refuse leachate treatment process according to any one of claim 1 to 6, is characterized in that, in step 2, described ferric sulfate is the FeSO of 40 ~ 60g/L with concentration
47H
2the form of the O aqueous solution adds, control FeSO
47H
2add that volume is refuse leachate volume in step one 0.5% ~ 2% of the O aqueous solution.
10. a kind of refuse leachate treatment process according to any one of claim 1 to 6, is characterized in that, in step 3, the volume ratio controlling refuse leachate in quality of activated carbon and step one in active carbon filler pond is 2 ~ 5g ﹕ 1L.
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| CN107857401A (en) * | 2017-11-22 | 2018-03-30 | 中国科学院城市环境研究所 | A kind of percolate nanofiltration concentrate treatment combined device |
| CN110040839A (en) * | 2019-05-08 | 2019-07-23 | 赵佳妮 | Handle the composition and preparation method thereof of fruits and vegetables rubbish |
| CN110294583A (en) * | 2019-07-15 | 2019-10-01 | 浙江创韵环境科技有限公司 | A kind of organic solid waste system for anaerobic treatment |
| CN111233198A (en) * | 2020-02-11 | 2020-06-05 | 武汉轻工大学 | Industrial wastewater treatment method and device |
| CN112162072A (en) * | 2020-09-28 | 2021-01-01 | 重庆大学 | BOD rapid detection method based on deep pretreatment of landfill leachate |
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| CN107540135A (en) * | 2017-10-17 | 2018-01-05 | 中国科学院城市环境研究所 | A kind of safe and efficient percolate nanofiltration concentrate processing group technology |
| CN107540135B (en) * | 2017-10-17 | 2020-07-07 | 中国科学院城市环境研究所 | Safe and efficient landfill leachate nanofiltration concentrated solution treatment combined process |
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| CN111233198A (en) * | 2020-02-11 | 2020-06-05 | 武汉轻工大学 | Industrial wastewater treatment method and device |
| CN112162072A (en) * | 2020-09-28 | 2021-01-01 | 重庆大学 | BOD rapid detection method based on deep pretreatment of landfill leachate |
| CN112162072B (en) * | 2020-09-28 | 2021-07-27 | 重庆大学 | BOD rapid detection method based on deep pretreatment of landfill leachate |
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