CN103910481B - A kind of Novel curing agent that utilizes solidifies the method disposing rubbish percolation liquid membrane concentrated solution mud - Google Patents

A kind of Novel curing agent that utilizes solidifies the method disposing rubbish percolation liquid membrane concentrated solution mud Download PDF

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Publication number
CN103910481B
CN103910481B CN201310003850.2A CN201310003850A CN103910481B CN 103910481 B CN103910481 B CN 103910481B CN 201310003850 A CN201310003850 A CN 201310003850A CN 103910481 B CN103910481 B CN 103910481B
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China
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mud
solidifying agent
concentrated solution
liquid membrane
membrane concentrated
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CN201310003850.2A
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Chinese (zh)
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CN103910481A (en
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赵华章
秦墨涵
李振山
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北京大学
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Abstract

The present invention relates to the method that rubbish percolation liquid membrane concentrated solution mud is disposed in the solidification of a kind of Novel curing agent.The present invention utilize covalent bond type inorganic organic composite flocculant and silicate cement composite go out a kind of new and effective solidifying agent, this solidifying agent can form the pollutent in strong solidification web, high efficiency parcel, fixing mud in lignin-sludge disposal process.The present invention is easy to operate, with low cost, and the solidification and stabilization that can be used for the mud of percolate or rubbish percolation liquid membrane concentrated solution process generation is disposed.

Description

A kind of Novel curing agent that utilizes solidifies the method disposing rubbish percolation liquid membrane concentrated solution mud

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 produces after membrane concentration liquid flocculation treatment, its complicated component, containing a large amount of heavy metals, organism etc., as process is not good at causing serious secondary pollution.The process of current mud is disposed means and is mainly comprised landfill, burning and Land_use change etc., but contains multiple pollutant, water ratio high due to membrane concentration liquid mud, and above-mentioned process is disposed means and received restriction in various degree.

The solidification of mud had both comprised interpolation solidifying agent makes it can not flow or form solid in mud, also comprises the material stabilization in mud, makes the objectionable impurities in mud become the material of hypotoxicity, low leachability and low migration.The curing technology the most frequently used to mud mainly comprises lime solidification, large-scale encapsulate and cement solidification etc. at present.Mud particulate wraps up by the xln that the hydration of the solidification process of cement mainly cement is formed, and the objectionable impurities in mud is closed in cured body, thus reach innoxious, the object of stabilization.In the curing process, the heavy metal ion in mud in the basic conditions, generates and is insoluble in the oxyhydroxide of water or carbonate etc. and is fixed in cement matrix, effectively can prevent the leaching of heavy metal ion.From economy and technical feasibility analysis, be cured process using cement as solidify material to mud and have broad application prospects, cement is cheap and easy to get, is convenient to engineer applied.

But high for organic content and containing multiple pollutant membrane concentration liquid mud, common solidifying agent can not make organism wherein and the effective stabilization of other pollutents.The hydrated product that mainly solidifying agent hydration reaction generates is cured to mud cementation is produced to solid waste particle.Mud due to water ratio high, inorganic solid particles composition is wherein considerably less, the hydrated product that the intensity formed after solidification treatment mainly relies on solidifying agent hydration reaction to be formed, the contribution of mud granule self to intensity is little, and heavy metal and organic existence hinder 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, have impact on the promotion and application of this technology in China.Covalent bond type inorganic organic composite flocculant can effectively combined organic and heavy metal, makes it be stably fixed in lattice, effectively can solve solidification and leach the problem exceeded standard afterwards.

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., can efficient solidification and stabilization to 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 and 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 the pollutent stable bond such as the organism in mud, heavy metal.Silicate cement used is ordinary Portland cement, cheap and easy to get.Organism, heavy metal etc. in membrane concentration liquid mud are cured the strong solidification net parcel formed, and are locked in the crystals of staggered generation, achieve 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 the mixing of a certain amount of solidifying agent, 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, adding certain water gaging according to moisture percentage in sewage sludge makes mixture water ratio 80% ~ 70%, mix after 10 minutes and discharge, namely health 1-10 days completes solidification process.This process efficiently can fix the pollutents such as organism, heavy metal and ammonia nitrogen in mud, cured article can directly landfill or be used as building materials.

Embodiment

Further illustrate the present invention with embodiment below, but be not limited thereto.

Embodiment 1

Solidifying agent is formed according to mass ratio 8: 2 is composite by silicate cement and solid covalent bond type inorganic organic composite flocculant.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)=8: 1 adds solidifying agent, add certain water gaging according to moisture percentage in sewage sludge and make mixture water ratio 80% ~ 70%, mix 10 minutes, discharge, health.Conditioned time is 5 days.Mud unconfined compression strength after health reaches 70.12kPa, and when can meet Sludge landfill, unconfined compression strength is not less than the requirement of 50kPa, and increase-volume ratio is 1.22.Carry out lixiviate experiment to the mud after process according to " GB5086.1-1997 solid waste Leaching leaching method-inversion method ", 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, Sludge landfill requirement can not be met, 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 the curing process, meets direct landfill or the requirement as building materials.

Embodiment 2

By silicate cement and covalent bond type inorganic organic composite flocculant composite according to mass ratio 7: 3, 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)=19: 1 adds solidifying agent, add certain water gaging according to moisture percentage in sewage sludge and make mixture water ratio 80% ~ 70%, mix 10 minutes, discharge, health.Conditioned time is 10 days.Mud unconfined compression strength after health reaches 92.49kPa, can meet landfill requirement of strength, and increase-volume ratio is 1.09, much smaller than the increase-volume ratio of Portland cement solidification.Not adding covalent bond type inorganic organic composite flocculant directly adopts silicate cement to process above-mentioned membrane concentration liquid mud, and after health, mud unconfined compression strength is 39.08kPa, can not meet Sludge landfill requirement, and increase-volume ratio is 1.32.Carry out lixiviate experiment to the mud after process according to " GB5086.1-1997 solid waste Leaching leaching method-inversion method ", the cured article COD leaching yield after Novel curing agent process is 0.03%, and ammonia nitrogen leaching yield is 0.23%.Adopt the cured article COD leaching yield after silicate cement process to be 24.88%, ammonia nitrogen leaching yield is 27.69%.Leaching rate of heavy metals after two kinds of solidifying agent solidifications 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 adopting 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 than little, organism and Leaching of Heavy Metals low, meet direct landfill or be used as the requirement of building materials.

Claims (3)

1. one kind utilizes solidifying agent to solidify the method disposing rubbish percolation liquid membrane concentrated solution mud, it is characterized in that: solidifying agent is by solid covalent bond type inorganic organic composite flocculant and silicate cement is composite forms, wherein 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.
2. method according to claim 1, is characterized in that: the effect of covalent bond type inorganic organic composite flocculant is that the pollutent in stable bond rubbish percolation liquid membrane concentrated solution mud makes it in the curing process and not easily leaches or migration after solidifying.
3. the method according to claim 1 and 2, it is characterized in that: in a certain amount of rubbish percolation liquid membrane concentrated solution mud, add the mixing of a certain amount of solidifying agent, 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, adding certain water gaging according to moisture percentage in sewage sludge makes mixture water ratio 80% ~ 70%, mix after 10 minutes and discharge, health 1-10 days.
CN201310003850.2A 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 CN103910481B (en)

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CN108380632A (en) * 2018-03-04 2018-08-10 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
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

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CN100488903C (en) * 2007-05-10 2009-05-20 上海交通大学 Treatment method for solidifying sludge of sewage plant in city
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TW201139298A (en) * 2010-05-12 2011-11-16 Ming-Yu Li Process for stabilizing hazardous sludge containing heavy metal
CN102443125B (en) * 2011-09-05 2013-10-02 天津壹生环保科技有限公司 Compound functional polymer having water reducing performance and heavy metal stabilizing performance

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