CN1781853A - Dewatering method for sludge microbiologically treating life waste water - Google Patents
Dewatering method for sludge microbiologically treating life waste water Download PDFInfo
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- CN1781853A CN1781853A CN 200510086739 CN200510086739A CN1781853A CN 1781853 A CN1781853 A CN 1781853A CN 200510086739 CN200510086739 CN 200510086739 CN 200510086739 A CN200510086739 A CN 200510086739A CN 1781853 A CN1781853 A CN 1781853A
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Abstract
The present invention belongs to the field of environment protection technology, and is especially process of dewatering sludge from city sewage treating microbiological process. The sludge dewatering process includes the following steps: 1. adding flyash into sludge in the amount of 0.2-0.6 g each liter of sludge, and stirring for 20-120 sec; 2. adding aluminum chloride in the amount of 4-6 wt% of dry sludge, and stirring for 20-120 sec; 3. adding polyacrylamine in the amount of 0.03-0.05 g each liter of sludge, and stirring for 20-90 sec; 4. depositing naturally for 10-600 sec; and 5. vacuum suction filtering or pressure filtering for 2-6 min. The said process can lower the water content of sludge from 99.4-99.8 % to 76.5-79.0 %, and compared with single polyacrylamine process, the present invention has higher sludge dewatering rate and low polyacrylamine consumption.
Description
Technical field
The invention belongs to the environmental protection field, particularly a kind of dewatering that is suitable for handling microbial method processing excess sludge that municipal wastewater produces.
Background technology
In whole capital costs of sewage work, be used to handle the 20%-50% that accounts for of mud, so sludge treatment is the important component part of Sewage treatment systems.In recent years, the sludge yield of municipal sewage plant sharply increases.Because the volume of mud is very huge, character is very unstable, is unfavorable for transportation and disposal; And, can bring secondary pollution to environment, and ecotope and mankind's activity have been constituted serious threat without after appropriately the mud of treatment and disposal enters environment.The problem of sludge treatment existence at present is: the water ratio height of (1) mud, transportation cost height; (2) the resource utilization rate is low.Be head it off, taked in mud, to add the method for flocculation agent, as adding metallic salt flocculation agent and polymeric flocculant.The advantage that adds the metallic salt flocculation agent is a less expensive, and usage is simple, but its consumption is big, and flocculating effect is poorer than the flocculating effect of polymeric flocculant.Existing described in " the synthetic and water quality of cationic polyacrylamide flocculant agent is to the research of its influence " (chemical propellant and macromolecular materials 2004.2 (5)) such as Wang Xiaochun.And that organic polymer coargulator has a consumption is few, and flocculation rate is fast, and the salt that coexisted, pH value and temperature effect are little, generate the few advantage of sludge quantity.Yet organic polymer coargulator is than inorganic flocculating agent cost height, and treatment effect is also not fully up to expectations, and adopts single flocculation agent to be unfavorable for handling complexity, various, mud that organic content is high in sludge dewatering.As described in " application of organic polymer coargulator in sludge dewatering " such as Shen Yinghua (polymer material science and engineering 2004.9.20 (5)).
Therefore, people begin to pay close attention to the novel method that two kinds of medicaments are used.As described in document: Shen Yinghua etc. " application of organic polymer coargulator in sludge dewatering " (polymer material science and engineering 2004.9.20 (5)), it has adopted cationic flocculant and amphiphilic polymers and inorganic flocculating agent and amphiphilic polymers to carry out compound respectively, more effective for the mud of handling inorganic salt and surfactant content height, dehydration difficulty, its water ratio can drop to 77.8%.But the cost height of amphoteric polymkeric substance, the market owning amount is less, is difficult for buying.So this kind method is applicable to the mud that is difficult to dewater, and is not suitable for municipal wastewater treatment plant excess sludge.
Summary of the invention
The objective of the invention is to improve the dewatering of excess sludge, make it be easy to realize mud-water separation, be convenient to post-processed, reduce the sludge disposal cost, thereby a kind of dewatering that microbial method is handled excess sludge that municipal wastewater produces that is suitable for handling is provided.
A kind of microbial method that is suitable for is handled the dewatering that sanitary sewage produces excess sludge, it is characterized in that present method adopts inorganic medicament aluminum chloride and inorganic adsorbing material flyash to add the compound flocculating aids that is mixed with of organic polymer coargulator polyacrylamide (PAM), is used for improving the excess sludge dewatering.
Present method is to add a kind of inorganic medicament aluminum chloride and a kind of inorganic adsorbing material flyash on the basis of common macromolecule organic flocculating agent polyacrylamide (PAM) more successively, stir certain hour, by the charge neutrality effect of inorganic medicament and inorganic adsorbing material and the structure of adsorption destruction mud, zeta-potential particularly, mud is taken off surely, utilize the adsorption bridging effect of organic polymer coargulator to improve dewatering efficiency again.Because this kind method has the advantage of inorganic flocculating agent and organic polymer coargulator concurrently, fully taken into account " synergistic effect " of flocculation agent, so can reduce and wrap up water in the mud, improve the settling property of mud, increase the intensity of floc sedimentation, thereby improve the gravity filtration performance of mud and the water ratio of filter cake.
Its step comprises: (1) evenly adds flyash in the excess sludge, and consumption is that every liter of excess sludge adds 0.2-0.6g, stirs 20～120 seconds; (2) add aluminum chloride again, add-on is dewatered sludge amount 4-6% (massfraction), stirs 20～120 seconds; (3) add 0.03～0.05g polyacrylamide (PAM) with every liter of excess sludge, stirred 20～90 seconds; (4) natural subsidence is 10～600 seconds; (5) vacuum filtration or press filtration are 2～6 minutes.The excess sludge of water ratio 99.4-99.8% water ratio after above-mentioned processing is 76.5-79.0%, has descended 3.1-5.6 percentage point than single with PAM, and the consumption of PAM descended 28.6%, has reduced the flocculation agent cost more significantly.
The granularity of above-mentioned flyash is :-74 μ m account for 100%, and density is: 1250-1450Kg/m
3
The invention has the advantages that:
(1) water ratio of mud reduces greatly, has reduced the volume and weight of mud cake, helps reducing follow-up mud trucking costs, has reduced the difficulty of sludge ultimate disposal;
(2) dewatering efficiency of raising sludge dewatering equipment, the conserve water resource;
(3) reduce the cost of flocculation agent, be easy to realize industrialization;
(4) increase the approach of the Ash Utilization that industrial and mining enterprises produce, helped the treatment of wastes with processes of wastes against one another, improved resource utilization, had a good benefits in environment;
(5) the sedimentation mud granule is big, is easy to sedimentation and separates.
Embodiment
Example 1
Flyash is evenly added in the excess sludge, and consumption is 0.2g/L, stirs for 30 seconds; Add aluminum chloride again, add-on is dewatered sludge amount 4% (massfraction), stirs for 30 seconds; Amount with 0.04g/L adds polyacrylamide (PAM), stirs for 30 seconds; Natural subsidence (about 15 seconds); Vacuum filtration or press filtration 3 minutes.Through above-mentioned processing, 3.10 percentage points have been descended than single water ratio during with PAM.
Example 2
Flyash is evenly added in the excess sludge, and consumption is 0.4g/L, stirs 1 minute; Add aluminum chloride again, add-on is dewatered sludge amount 5% (massfraction), stirs 1 minute; Amount with 0.04g/L adds polyacrylamide (PAM), stirs 1 minute; Natural subsidence (about 30 seconds); Vacuum filtration or press filtration 4 minutes.Through above-mentioned processing, 3.89 percentage points have been descended than single water ratio during with PAM.
Example 3
Flyash is evenly added in the excess sludge, and consumption is 0.6g/L, stirs 90 seconds; Add aluminum chloride again, add-on is dewatered sludge amount 6% (massfraction), stirs 90 seconds; Amount with 0.04g/L adds polyacrylamide (PAM), stirs 80 seconds; Natural subsidence (about 60 seconds); Vacuum filtration or press filtration 5 minutes.Through above-mentioned processing, 5.60 percentage points have been descended than single water ratio during with PAM.
Claims (2)
1. one kind is suitable for the dewatering that microbial method is handled sanitary sewage generation excess sludge, it is characterized in that adopting inorganic medicament aluminum chloride and inorganic adsorbing material flyash to add the compound flocculating aids that is mixed with of organic polymer coargulator polyacrylamide (PAM), the flyash consumption is that every liter of excess sludge adds 0.2-0.6g, aluminum chloride massfraction add-on is the 4-6% of dewatered sludge amount, and every liter of excess sludge of polyacrylamide adds 0.03～0.05g.
2. be suitable for microbial method according to claim 1 and handle the excess sludge dewatering that sanitary sewage produces, it is characterized in that treatment step comprises: (1) evenly adds flyash in the excess sludge, stirs 20～120 seconds; (2) add aluminum chloride again, stirred 20～120 seconds; (3) add polyacrylamide, stirred 20～90 seconds; (4) natural subsidence is 10～600 seconds; (5) vacuum filtration or press filtration are 2～6 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510086739 CN1781853A (en) | 2005-10-28 | 2005-10-28 | Dewatering method for sludge microbiologically treating life waste water |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200510086739 CN1781853A (en) | 2005-10-28 | 2005-10-28 | Dewatering method for sludge microbiologically treating life waste water |
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| CN1781853A true CN1781853A (en) | 2006-06-07 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101985386A (en) * | 2010-12-09 | 2011-03-16 | 湖南多普生环境能源有限公司 | Conditioner and conditioning method for dewatering of domestic sludge |
| CN102452781A (en) * | 2010-10-22 | 2012-05-16 | 宇星科技发展(深圳)有限公司 | Carbon-based sludge composite regulating and dehydrating agent based on sludge incineration |
| CN103159389A (en) * | 2011-12-16 | 2013-06-19 | 贵阳铝镁设计研究院有限公司 | Efficient treatment method for sludge and sludge drying bed |
| CN103193374A (en) * | 2013-05-03 | 2013-07-10 | 湖南品铸科技发展有限公司 | Sludge dewatering tempering agent and method for sludge dewatering by utilizing same |
| CN106495303A (en) * | 2016-09-08 | 2017-03-15 | 北京神雾环境能源科技集团股份有限公司 | A kind of method that utilization calcium carbide furnace gas dust prepares water body oily waste degradation agent |
| CN106915893A (en) * | 2017-04-28 | 2017-07-04 | 新锦龙生物基材料（湖北）有限公司 | The method and its device of a kind of efficient process sludge dewatering |
| CN111875232A (en) * | 2020-08-10 | 2020-11-03 | 安徽工业大学 | Integrated treatment method for quickly separating mud and water from building waste slurry and solidifying filter mud |
| CN113929278A (en) * | 2021-11-26 | 2022-01-14 | 西安西热水务环保有限公司 | Method for improving dehydration performance of magnesium hydroxide |
-
2005
- 2005-10-28 CN CN 200510086739 patent/CN1781853A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452781A (en) * | 2010-10-22 | 2012-05-16 | 宇星科技发展(深圳)有限公司 | Carbon-based sludge composite regulating and dehydrating agent based on sludge incineration |
| CN102452781B (en) * | 2010-10-22 | 2015-12-02 | 宇星科技发展(深圳)有限公司 | Based on the carbon back mud combined cooker dewatering agent of sludge incineration |
| CN101985386A (en) * | 2010-12-09 | 2011-03-16 | 湖南多普生环境能源有限公司 | Conditioner and conditioning method for dewatering of domestic sludge |
| CN101985386B (en) * | 2010-12-09 | 2012-04-18 | 湖南多普生环境能源有限公司 | Conditioner and conditioning method for dewatering of domestic sludge |
| CN103159389A (en) * | 2011-12-16 | 2013-06-19 | 贵阳铝镁设计研究院有限公司 | Efficient treatment method for sludge and sludge drying bed |
| CN103193374A (en) * | 2013-05-03 | 2013-07-10 | 湖南品铸科技发展有限公司 | Sludge dewatering tempering agent and method for sludge dewatering by utilizing same |
| CN106495303A (en) * | 2016-09-08 | 2017-03-15 | 北京神雾环境能源科技集团股份有限公司 | A kind of method that utilization calcium carbide furnace gas dust prepares water body oily waste degradation agent |
| CN106915893A (en) * | 2017-04-28 | 2017-07-04 | 新锦龙生物基材料（湖北）有限公司 | The method and its device of a kind of efficient process sludge dewatering |
| CN111875232A (en) * | 2020-08-10 | 2020-11-03 | 安徽工业大学 | Integrated treatment method for quickly separating mud and water from building waste slurry and solidifying filter mud |
| CN111875232B (en) * | 2020-08-10 | 2022-07-08 | 安徽工业大学 | Integrated treatment method for quickly separating mud and water from building waste slurry and solidifying filter mud |
| CN113929278A (en) * | 2021-11-26 | 2022-01-14 | 西安西热水务环保有限公司 | Method for improving dehydration performance of magnesium hydroxide |
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