CN102267796B - Sludge curing agent for treating sludge in urban sewage treatment plant and sludge treatment method - Google Patents
Sludge curing agent for treating sludge in urban sewage treatment plant and sludge treatment method Download PDFInfo
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Abstract
The invention relates to a sludge curing agent for treating sludge in an urban sewage treatment plant. The sludge curing agent consists of the following components in percentage by mass: 40-60 percent of sludge bottom ash, 20-40 percent of lime and 10-20 percent of magnesium chloride, wherein the lime is raw lime; the sludge bottom ash is dried bottom ash of sludge in the urban sewage treatment plant; and the magnesium chloride is industrial grade absolute magnesium chloride. The treatment method disclosed by the invention comprises the following steps of: adding sewage plant sludge with the water content of 95-97 percent and a sludge curing agent of which the wet weight mass percentage is 5-10 percent in the terms of the sewage plant sludge with the water content of 95-97 percent into a sludge stirrer; mixing and stirring for not less than 10 minutes; molding in a mold; and demolding, and maintaining at room temperature for 1-7 days for performing landfilling or serving as an earth covering material for a landfill field. The method has the advantages of convenience for operation, low cost and the like; and moreover, the odor of cured sludge is greatly lowered, so that damage to operation personnel is lowered to the maximum extent, and the method can be widely applied to curing stabilization treatment of sewage in the urban sewage plant.
Description
Technical field
The present invention relates to a kind of sludge solidifying agent, especially for Treating Municipal Sewage treatment plant mud, make it to satisfy the security landfill requirement or as sludge solidifying agent and the method for sludge treatment thereof of Landfill.
Background technology
Mud is the by product that city domestic sewage is processed,, complicated components bulky due to it, water ratio is high, intensity is low, also contain simultaneously the objectionable impuritiess such as a large amount of pathogenic microorganisms, parasitic ovum, heavy metal, and produce with stench, these unfavorable factors have all been brought inconvenience to its transportation, storage and follow-up recycling.Therefore, the processing of mud is at present disposed and has been become the significant problem that municipal wastewater treatment plant faces.
At present, sludge treating method mainly comprises sanitary landfill, compost and burning etc.But the excess sludge water ratio is generally higher, secondary pond excess sludge water ratio is generally up to 98%-99%, its water ratio of excess sludge after concentration is also usually in the 95%-97% left and right, too high water ratio, be all can produce serious disadvantageous effect to landfill, compost or burning disposal, seriously restricted its promotion and application.The curing/stabilizing method is that a kind of solidify material that adds in the mud reduces moisture percentage in sewage sludge, improves its mechanical stability, the noxious pollutant such as efficient fixedly Heavy Metals in Sludge simultaneously, the preconditioning technique of accelerate sludge stabilization process.It is efficient low energy, simple to operate not only, and can effectively reduce the water ratio of mud, improve its mechanical stability, the also fixing pollutent such as Heavy Metals in Sludge simultaneously, reduce its environmental transport and transfer ability, this provides prerequisite for the final harmlessness disposing of mud, can expect that the curing/stabilizing technology of mud will become one of Main Means of sludge pretreatment from now on.At present, the document of the curing/stabilizing method of relevant mud has:
Chinese patent literature " mud, sludge solidifying agent " (publication number CN 101638311A, open day on February 3rd, 2010) disclose a kind of mud, sludge solidifying agent, this solidifying agent is comprised of the major ingredient of 95% cementation and the auxiliary material of 5% its katalysis.Major ingredient is: coal gangue, wilkinite, wollastonite, volcanic ash soil, slag, flyash, grey rock and carbide slag; Auxiliary material is mainly: polyacrylamide, and trolamine, silica powder, aerosil, cupric oxide, ferric oxide, calcium hydroxide, water glass and phosphoric acid form.Its major advantage is that the solidifying agent addition is less, is 5%-10%; But weak point is, curing agent component is too complicated, and cost is higher, and difficulty of construction is large.
Chinese patent literature " sewage plant sewage sludge curing/stabilizing treatment material " (publication number CN 101428950A, open day on May 13rd, 2009) disclose a kind of sewage plant sewage sludge curing/stabilizing treatment material, this material mainly is comprised of cement, clay mineral, promoting agent and Sodium sulfate anhydrous.min(99).Although solidify material has higher epistasis energy morning, its addition is larger, is generally the 10-15% of mud weight in wet base.In addition, its complicated component, difficulty of construction is large, for applying of this technology proposed new problem.
Chinese patent literature " a kind of sludge solidifying agent and application " relates to a kind of formula and raw material of sludge curing in (publication number CN 101265070A, open day on September 17th, 2008).Its solidifying agent mainly by Tai-Ace S 150, salt cement, gypsum, lime and a small amount of setting accelerator by a certain percentage mixed preparing form, the each component proportioning is followed successively by 30-60%, 20-40%, 8-20% and 1-5%.After solidifying agent and mud mix and blend, can carry out security landfill after maintenance 1-7 or as material of construction, but its weak point is, solidifying agent is expensive, complicated component, and addition is larger, is unfavorable for large-scale sludge curing.
Chinese patent literature " sludge dewatering and stabilization treatment method " (publication number CN 1693242A, open day on November 9th, 2005) relate to a kind of sludge dewatering and stabilization treatment method, by adding alkaline pulverulent material two step process to the mud heat drying with in mud, mud is dewatered and stabilization treatment, and industrial residue alkalescence powder can be the flying dust of flyash, industrial dust, fly-ash separator collection etc.The aspects such as its hardness of treated mud, viscosity and bonding characteristic all have clear improvement, dewatering performance of sludge be improved significantly.But the add-on of its amendment is larger, and this follow-up safe disposal to mud is very disadvantageous, also can greatly increase the safe disposal expense of mud simultaneously.
Although above invention differs from one another, still there are three following large deficiency and shortcomings when being applied to sludge curing/stabilizing:
One. solidifying agent throwing add-on is larger, and the mud increase-volume is obvious;
Two. curing agent component is complicated, is not suitable for extensive curing/stabilizing and uses;
Three. economy is relative with environmental benefit relatively poor, and investment is higher with working cost.
Summary of the invention
One of technical problem to be solved by this invention is to provide a kind of sludge solidifying agent for the treatment of sludge from wastewater treatment plant for the existing many technical problems of existing sludge solidifying agent, this sludge solidifying agent is cheap, consumption is few, the curing/stabilizing that can be used for the large-scale city sewage plant sludge, but the solidification sludge water ratio is down to 60% within a short period of time, satisfies the requirements such as mud sanitary landfill.
Two of technical problem to be solved by this invention is to utilize the method for above-mentioned sludge solidifying agent Treating Municipal Sewage treatment plant mud.
Technical problem to be solved by this invention can be achieved through the following technical solutions:
As a kind of sludge solidifying agent for the treatment of sludge from wastewater treatment plant of first aspect present invention, be that the sludge incineration bottom ash of 40-60%, lime and the mass percent that mass percent is 20-40% are the magnesium chloride of 10-20% by mass percent.
Wherein, described lime is unslaked lime, and described sludge incineration bottom ash is municipal sewage sludge anhydration and incineration bottom ash, and described magnesium chloride is the technical grade Magnesium Chloride Anhydrous.
Method as a kind of sludge solidifying agent lignin-sludge for the treatment of sludge from wastewater treatment plant of second aspect present invention, it is characterized in that, at first, adding water ratio 95～97% sewage plant sludges and described water ratio 95～97% sewage plant sludge weight in wet base mass percents in the sludge agitation device is 5～10% described sludge solidifying agents, then carry out mix and blend, churning time should be no less than 10 minutes, after stirring end, in die for molding, carry out landfill after the demoulding after 1～7 day in maintenance under room temperature or as the landfill yard casingmaterial.
Compared with prior art, the present invention has advantage and effect:
1. technique of the present invention is simple, and is easy to operate;
Due to the present invention take lime, sludge incineration bottom ash and magnesium chloride as main solidify material, addition is few, processing cost is low, therefore Pollutant Treatment is comparatively thorough, has higher environment and economy benefit;
3. municipal sewage sludge through after solidification treatment, can be realized security landfill or recycling.
Embodiment
Embodiment 1:
In agitator, adding water ratio is the sludge solidifying agent of 95～97% sewage plant sludges and mud weight in wet base 5%, mud and sludge solidifying agent mix and blend 10～15 minutes, stir rear in carrying out maintenance under room temperature after 4 days, its water ratio can be down to 59.3%, and solidification sludge can be carried out security landfill or carry out recycling as Landfill this moment.
Wherein the sludge solidifying agent each component mixes according to mass percent:
Sludge incineration bottom ash 50%
Calcium oxide 30%
Technical grade magnesium chloride 20%
Embodiment 2
The sludge solidifying agent of the present embodiment formula identical with embodiment 1, in agitator, adding water ratio is the sludge solidifying agent of 95～97% sewage plant sludges and mud weight in wet base 10%, mud and sludge solidifying agent mix and blend 10～15 minutes, stir rear after carrying out maintenance 2-3 days under room temperature, its water ratio can be down to below 60%, and solidification sludge can be carried out security landfill or carry out recycling as Landfill this moment.
Embodiment 3
In agitator, adding water ratio is the sludge solidifying agent of 95～97% sewage plant sludges and mud weight in wet base 5%, mud and sludge solidifying agent mix and blend 10～15 minutes, stir rear in carrying out maintenance under room temperature after 4 days, its water ratio can be down to 59.3%, and solidification sludge can be carried out security landfill or carry out recycling as Landfill this moment.
Wherein the sludge solidifying agent each component mixes according to mass percent:
Sludge incineration bottom ash 60%
Calcium oxide 20%
Technical grade magnesium chloride 20%
Embodiment 4
The sludge solidifying agent of the present embodiment formula identical with embodiment 3, in agitator, adding water ratio is the sludge solidifying agent of 95～97% sewage plant sludges and mud weight in wet base 10%, mud and sludge solidifying agent mix and blend 10～15 minutes, stir rear after carrying out maintenance 1-2 days under room temperature, its water ratio can be down to below 60%, and solidification sludge can be carried out security landfill or carry out recycling as Landfill this moment.
Embodiment 5:
In agitator, adding water ratio is the sludge solidifying agent of 95～97% sewage plant sludges and mud weight in wet base 5%, mud and sludge solidifying agent mix and blend 15 minutes, stir rear in carrying out maintenance under room temperature after 7 days, its water ratio can be down to 55.0%, and solidification sludge can be carried out security landfill or carry out recycling as Landfill this moment.
Wherein the sludge solidifying agent each component mixes according to mass percent:
Sludge incineration bottom ash 40%
Calcium oxide 40%
Technical grade magnesium chloride 20%
Embodiment 6:
In agitator, adding water ratio is the sludge solidifying agent of 95～97% sewage plant sludges and mud weight in wet base 5%, mud and sludge solidifying agent mix and blend 10 minutes, stir rear in carrying out maintenance under room temperature after 6 days, its water ratio can be down to 57.0%, and solidification sludge can be carried out security landfill or carry out recycling as Landfill this moment.
Wherein the sludge solidifying agent each component mixes according to mass percent:
Sludge incineration bottom ash 50%
Calcium oxide 40%
Technical grade magnesium chloride 10%
Claims (5)
1. sludge solidifying agent for the treatment of sludge from wastewater treatment plant is that the magnesium chloride that the sludge incineration bottom ash of 40-60%, lime that mass percent is 30-40% and mass percent are 10-20% forms by mass percent.
2. sludge solidifying agent according to claim 1, it is characterized in that: described lime is unslaked lime.
3. sludge solidifying agent according to claim 1, it is characterized in that: described sludge incineration bottom ash is municipal sewage sludge anhydration and incineration bottom ash.
4. sludge solidifying agent according to claim 1, it is characterized in that: described magnesium chloride is the technical grade Magnesium Chloride Anhydrous.
5. the method for the sludge solidifying agent lignin-sludge for the treatment of sludge from wastewater treatment plant claimed in claim 1, it is characterized in that: adding the sewage plant sludge of water ratio 95～97% and account for described sewage plant sludge weight in wet base mass percent in the sludge agitation device is 5～10% sludge solidifying agent, then carry out mix and blend, churning time should be no less than 10 minutes, after stirring end, in die for molding, carry out landfill after the demoulding after 1～7 day in maintenance under room temperature or as the landfill yard casingmaterial.
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| CN 201110191790 CN102267796B (en) | 2011-07-08 | 2011-07-08 | Sludge curing agent for treating sludge in urban sewage treatment plant and sludge treatment method |
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| CN 201110191790 CN102267796B (en) | 2011-07-08 | 2011-07-08 | Sludge curing agent for treating sludge in urban sewage treatment plant and sludge treatment method |
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| CN102267796A CN102267796A (en) | 2011-12-07 |
| CN102267796B true CN102267796B (en) | 2013-06-26 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103553293B (en) * | 2013-11-07 | 2014-12-24 | 上海环保工程成套有限公司 | Deep dehydration method for solidifying fresh sludge through landfill stabilized sludge incineration residue |
| CH714568B1 (en) | 2017-11-24 | 2020-03-13 | Univ Southeast | Treatment system for ex situ carbonization and consolidation of a silt soil using active magnesium oxide and associated process. |
| CN109293326B (en) * | 2018-11-23 | 2021-02-26 | 中国葛洲坝集团绿园科技有限公司 | Curing agent for sludge treatment and preparation method and application thereof |
| CN111592244B (en) * | 2020-06-02 | 2022-05-20 | 张斌 | Solid waste sludge conversion bonding sintering material |
| CN111848113A (en) * | 2020-07-28 | 2020-10-30 | 南京河海环境研究院有限公司 | Method and device for realizing efficient reduction and recycling of dewatered sludge by hydrothermal system |
| CN112239312A (en) * | 2020-09-23 | 2021-01-19 | 杭州国泰环保科技股份有限公司 | Method for landfill of sludge |
| CN113149589A (en) * | 2021-04-25 | 2021-07-23 | 上海市建筑科学研究院有限公司 | Soil body curing agent doped with sludge incineration ash and preparation method thereof |
| CN113603328A (en) * | 2021-08-10 | 2021-11-05 | 天翊科技有限公司 | Method for preparing oil sludge curing agent by using filter-pressed soil |
| CN114133121A (en) * | 2021-10-19 | 2022-03-04 | 中国科学院武汉岩土力学研究所 | Dredged sediment solidification treatment material with high water content and preparation method thereof |
| CN114044618A (en) * | 2021-11-25 | 2022-02-15 | 上海交通大学 | Sludge forming agent and application thereof in sludge granulation |
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| JPH105800A (en) * | 1996-06-21 | 1998-01-13 | Chichibu Onoda Cement Corp | Dehydration treating material for sludge and dehydration treatment |
| CN101254996A (en) * | 2008-03-24 | 2008-09-03 | 上海明诺环境科技有限公司 | Method for treating dehydrated sludge of domestic sewage treatment plant |
| CN101863601A (en) * | 2009-04-14 | 2010-10-20 | 株式会社安农津技研 | Flocculation curing agent, composition thereof and stabilization improvement method of silt type soil |
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