CN103910481A - Method for carrying out curing treatment on landfill leachate membrane concentration solution sludge by using novel curing agent - Google Patents
Method for carrying out curing treatment on landfill leachate membrane concentration solution sludge by using novel curing agent Download PDFInfo
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Abstract
The invention relates to a method for carrying out a curing treatment on landfill leachate membrane concentration solution sludge by using a novel curing agent. According to the present invention, a covalent bond type inorganic-organic composite flocculant and silicate cement are compounded to obtain a novel efficient curing agent, and the curing agent can form a powerful curing network so as to efficiently warp and fix contaminants in the sludge during the sludge treatment process; and the method has characteristics of convenient operation and low cost, and can be used for the curing stabilization treatment of the sludge produced through the landfill leachate treatment or landfill leachate membrane concentration solution treatment.
Description
Technical field
The present invention relates to a kind of method of solidification treatment rubbish percolation liquid membrane concentrated solution mud.Specifically, the present invention adopts a kind of novel sludge solidifying agent can effectively solidify and stabilization rubbish percolation liquid membrane concentrated solution mud.
Background technology
Rubbish percolation liquid membrane concentrated solution mud is to producing after membrane concentration liquid flocculation treatment, and its complicated component, contains a large amount of heavy metal, organism etc., is not good at causing serious secondary pollution as processed.The processing of mud is at present disposed means and is mainly comprised landfill, burning and soil utilization etc., but because membrane concentration liquid mud contains multiple pollutant, water ratio high, above-mentioned processing disposal means have been subject to restriction in various degree.
Solidifying of mud both comprised that add solidifying agent made it can not flow or form solid in mud, also comprised the material stabilization in mud, made objectionable impurities in mud become the material of hypotoxicity, low leachability and low migration.At present to the most frequently used curing technology of mud mainly comprise that lime solidifies, large-scale encapsulate and cement solidification etc.The solidification process of cement is mainly that the xln that the hydration of cement forms wraps up mud particulate, the objectionable impurities in mud is closed in cured body, thereby reaches object innoxious, stabilization.In solidification process, the heavy metal ion in mud is under alkaline condition, and oxyhydroxide or carbonate etc. that generation is insoluble in water are fixed in cement matrix, can effectively prevent the leaching of heavy metal ion.From economy and technical feasibility analysis, using cement as solidify material, mud is cured to processing and has broad application prospects, cement is cheap and easy to get, is convenient to engineering application.
But high for organic content and contain multiple pollutant membrane concentration liquid mud, common solidifying agent can not make organism and the effective stabilization of other pollutents wherein.It is mainly that the hydrated product that solidifying agent hydration reaction generates produces cementation to solid waste particle that mud is cured.Mud is because water ratio is high, inorganic solid particles composition is wherein considerably less, the intensity forming after solidification treatment is mainly the hydrated product that relies on solidifying agent hydration reaction to form, mud granule self is little to the contribution of intensity, and heavy metal and organic existence have hindered the hydration reaction of cement, need to consume a large amount of solidifying agent and could obtain certain intensity, so its processing costs is very high, affect the promotion and application of this technology in China.Covalent bond type inorganic organic composite flocculant is combined organic and heavy metal effectively, and it is stably fixed in lattice, can effectively solve the problem that after solidifying, leaching exceeds standard.
Summary of the invention
The present invention develops a kind of new and effective sludge solidifying agent, effectively fixes organism, heavy metal and ammonia nitrogen etc., to efficiently solidification and stabilization of rubbish percolation liquid membrane concentrated solution mud.
The present invention's sludge solidifying agent used is by solid covalent bond type inorganic organic composite flocculant and silicate cement is composite forms.Covalent bond type inorganic organic composite flocculant be patent of invention " a kind of covalent bond type inorganic organic composite flocculant, preparation technology and application thereof " (application number: the covalent bond type inorganic organic composite flocculant 200810115990.8), this type of flocculation agent can with mud in the pollutent such as organism, heavy metal stable bond.Silicate cement used is ordinary Portland cement, cheap and easy to get.Organism, heavy metal etc. in the membrane concentration liquid mud strong curing net parcel forming that is cured, is locked in the staggered crystals generating, and has realized indissoluble, insoluble.
In the above-mentioned sludge solidifying agent that the present invention uses, silicate cement accounts for 50% to 99% of solidifying agent total mass, and solid covalent bond type inorganic organic composite flocculant accounts for 50% to 1% of solidifying agent total mass.
Concrete program curing is: in a certain amount of rubbish percolation liquid membrane concentrated solution mud, add a certain amount of solidifying agent to mix, solidifying agent accounts for 5% to 40% of total mass, rubbish percolation liquid membrane concentrated solution mud accounts for 95% to 60% of total mass, add certain water gaging to make mixture water ratio 80%～70% according to moisture percentage in sewage sludge, after mixing 10 minutes, discharge, within health 1-10 days, complete solidification process.This process can efficiently be fixed the pollutents such as organism, heavy metal and the ammonia nitrogen in mud, directly landfill or as building materials of cured article.
Embodiment
Further illustrate the present invention with embodiment below, but be not limited to this.
Embodiment 1
Solidifying agent by silicate cement and solid covalent bond type inorganic organic composite flocculant according to 8: 2 composite forming of mass ratio.Silicate cement used is ordinary Portland cement; Solid covalent bond type inorganic composite floculant aluminum oxide (Al used
2o
3) content is 13.5%.Mud is the membrane concentration liquid mud of rubbish percolation liquid membrane concentrated solution after flocculation treatment, its organic content 3851mg/g.Get a certain amount of pending membrane concentration liquid mud, by mud: solidifying agent (butt)=add solidifying agent at 8: 1, add certain water gaging to make mixture water ratio 80%～70% according to moisture percentage in sewage sludge, mix 10 minutes, discharge, health.Conditioned time is 5 days.Mud unconfined compression strength after health has reached 70.12kPa, and can meet Sludge landfill time, unconfined compression strength is not less than the requirement of 50kPa, and increase-volume ratio is 1.22.Mud after treatment is carried out to lixiviate experiment according to " GB5086.1-1997 solid waste Leaching leaching method-inversion method ", and its COD leaching yield is 0.05%, and ammonia nitrogen leaching yield is 1.03%.Not adding covalent bond type inorganic organic composite flocculant directly adopts silicate cement to process above-mentioned membrane concentration liquid mud, mud unconfined compression strength 33.41kPa after health, can not meet Sludge landfill requirement, increase-volume ratio is 1.44, COD leaching yield is 17.32%, and ammonia nitrogen leaching yield is 21.32%.Adopt the Novel curing agent in the present invention to be cured membrane concentration liquid mud, cured article increase-volume is than little, and pollutent is efficient stable in solidification process, meets direct landfill or the requirement as building materials.
Embodiment 2
Silicate cement and covalent bond type inorganic organic composite flocculant is composite according to mass ratio 7: 3, get final product to obtain sludge solidifying agent of the present invention.Silicate cement used is ordinary Portland cement; Solid covalent bond type inorganic composite floculant aluminum oxide (Al used
2o
3) content is 16%.Mud is the membrane concentration liquid mud of rubbish percolation liquid membrane concentrated solution after flocculation treatment, its organic content 3624mg/g.Get a certain amount of pending membrane concentration liquid mud, by mud: solidifying agent (butt)=add solidifying agent at 19: 1, add certain water gaging to make mixture water ratio 80%～70% according to moisture percentage in sewage sludge, mix 10 minutes, discharge, health.Conditioned time is 10 days.Mud unconfined compression strength after health has reached 92.49kPa, can meet landfill requirement of strength, and increase-volume ratio is 1.09, much smaller than the curing increase-volume ratio of Portland cement.Do not add covalent bond type inorganic organic composite flocculant and directly adopt silicate cement to process above-mentioned membrane concentration liquid mud, after health, mud unconfined compression strength is 39.08kPa, can not meet Sludge landfill requirement, and increase-volume ratio is 1.32.Mud after treatment is carried out to lixiviate experiment according to " GB5086.1-1997 solid waste Leaching leaching method-inversion method ", and Novel curing agent cured article COD after treatment leaching yield is 0.03%, and ammonia nitrogen leaching yield is 0.23%.Adopting silicate cement cured article COD after treatment leaching yield is 24.88%, and ammonia nitrogen leaching yield is 27.69%.Leaching rate of heavy metals after two kinds of solidifying agent solidify is as shown in table 1 below:
Table 1 health leaching yield of heavy metal in vat liquor after 10 days
As shown in Table 1, compared with solidifying with employing silicate cement, after the Novel curing agent that adopts present method to prepare is cured, its cured article leaching rate of heavy metals reduces greatly.Adopt the Novel curing agent in the present invention to be cured membrane concentration liquid mud, cured article increase-volume is than little, and organism and Leaching of Heavy Metals are low, meets direct landfill or the requirement as building materials.
Claims (4)
1. utilize Novel curing agent to solidify a method of disposing rubbish percolation liquid membrane concentrated solution mud, it is characterized in that: solidifying agent is by covalent bond type inorganic organic composite flocculant and silicate cement is composite forms.
2. by the solidifying agent described in claim 1, it is characterized in that: the effect of covalent bond type inorganic organic composite flocculant is to make the pollutent efficient stable in solidification process in rubbish percolation liquid membrane concentrated solution mud, make it to be difficult for leaching and migration.
3. by the solidifying agent described in claim 1 and 2, it is characterized in that: silicate cement accounts for 50% to 99% of solidifying agent total mass, covalent bond type inorganic organic composite flocculant accounts for 50% to 1% of solidifying agent total mass.
4. by the method described in claim 1, it is characterized in that: in a certain amount of rubbish percolation liquid membrane concentrated solution mud, add a certain amount of solidifying agent to mix, solidifying agent accounts for 5% to 40% of total mass, rubbish percolation liquid membrane concentrated solution mud accounts for 95% to 60% of total mass, add certain water gaging to make mixture water ratio 80%～70% according to moisture percentage in sewage sludge, after mixing 10 minutes, discharge health 1-10 days.
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| CN201310003850.2A CN103910481B (en) | 2013-01-07 | 2013-01-07 | A kind of Novel curing agent that utilizes solidifies the method disposing rubbish percolation liquid membrane concentrated solution mud |
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| CN201310003850.2A CN103910481B (en) | 2013-01-07 | 2013-01-07 | A kind of Novel curing agent that utilizes solidifies the method disposing rubbish percolation liquid membrane concentrated solution mud |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332344A (en) * | 2018-03-04 | 2019-02-15 | 辽宁海天阁环保科技有限公司 | Refuse landfill concentrate recycling treatment and rubbish waterproof cover in-situ applications technique |
| CN109833586A (en) * | 2019-01-23 | 2019-06-04 | 东南大学 | A kind of high efficiency, low cost processing method of liquid debris |
| CN110372175A (en) * | 2019-08-30 | 2019-10-25 | 重庆艾克洛环保科技有限公司 | A kind of sludge conditioner and sludge drying processing method |
| CN111747621A (en) * | 2020-05-28 | 2020-10-09 | 武汉天源环保股份有限公司 | Landfill leachate curing treatment method and landfill leachate curing treatment device |
| CN111960765A (en) * | 2020-08-19 | 2020-11-20 | 湖南天为环保科技有限公司 | Evaporation residue curing process based on garbage leachate full-quantization treatment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109332344A (en) * | 2018-03-04 | 2019-02-15 | 辽宁海天阁环保科技有限公司 | Refuse landfill concentrate recycling treatment and rubbish waterproof cover in-situ applications technique |
| CN109332344B (en) * | 2018-03-04 | 2019-07-12 | 辽宁海天阁环保科技有限公司 | Refuse landfill concentrate recycling treatment and rubbish waterproof cover in-situ applications technique |
| CN109833586A (en) * | 2019-01-23 | 2019-06-04 | 东南大学 | A kind of high efficiency, low cost processing method of liquid debris |
| CN110372175A (en) * | 2019-08-30 | 2019-10-25 | 重庆艾克洛环保科技有限公司 | A kind of sludge conditioner and sludge drying processing method |
| CN111747621A (en) * | 2020-05-28 | 2020-10-09 | 武汉天源环保股份有限公司 | Landfill leachate curing treatment method and landfill leachate curing treatment device |
| CN111960765A (en) * | 2020-08-19 | 2020-11-20 | 湖南天为环保科技有限公司 | Evaporation residue curing process based on garbage leachate full-quantization treatment |
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| CN103910481B (en) | 2015-09-30 |
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