CN102674657A - Sludge dewatering method for urban sewage plant - Google Patents
Sludge dewatering method for urban sewage plant Download PDFInfo
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- CN102674657A CN102674657A CN2012101904019A CN201210190401A CN102674657A CN 102674657 A CN102674657 A CN 102674657A CN 2012101904019 A CN2012101904019 A CN 2012101904019A CN 201210190401 A CN201210190401 A CN 201210190401A CN 102674657 A CN102674657 A CN 102674657A
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Abstract
The invention discloses a sludge dewatering method used for an urban sewage plant. The method comprises the following steps of: putting original sludge of the urban sewage plant in a container, wherein the moisture content of the sludge is more than 90 percent, and stirring fully and uniformly; adding mixed coagulant aids of dolomite and quick lime into the obtained sludge and uniformly stirring; adding inorganic flocculant, stirring uniformly, adding a polyacrylamide (PAM) flocculating agent, and stirring uniformly; and feeding the obtained sludge into a plate-and-frame filter press, squeezing and dewatering the sludge, keeping pressure for 5 to 30 minutes, and decompressing and discharging. The sludge of the urban sewage plant is conditioned and flocculated further, and then is filtered, squeezed and dewatered, so that moisture in the original sludge in the sewage plant, which is not dewatered by a belt filter press, can be dewatered effectively, the treatment process of the sludge dewatering method is simple, and the sludge dewatering method is low in treatment cost.
Description
Technical field
The invention belongs to technical field of sludge treatment, be specifically related to a kind of municipal sewage sludge treatment process, relate in particular to dewatering agent that is used for sludge dewatering and mud dewatering method that coagulant aids and flocculation agent are formed.
Background technology
Along with the quickening of Urbanization in China, treatment rate of domestic sewage improves year by year, and activated sludge process is one of main method of present Treating Municipal Sewage; In sewage treatment process, produce a large amount of excess sludges inevitably; These sludge moisture contents are high, particle is tiny, are mostly wetting ability negative electricity biomone, and contain a large amount of organism, heavy metal, pathogenic bacteria etc. in the mud; Behind mud entering environment without appropriate treatment and disposal; Bring secondary pollution directly for water body and atmosphere, not only reduced the effective processing capacity of Sewage treatment systems, and ecotope and mankind's activity have been constituted serious threat.
It is one of important component part of sewage treatment project that municipal sewage sludge is handled, and the purpose of sludge treatment is to make sludge reduction, stabilization, innoxious and comprehensive utilization.The active sludge of present most municipal wastewater treatment plant adopts belt filter press to carry out sludge dewatering; Its water ratio of mud after the dehydration is high; Generally reach about 80%, because water ratio is high, directly sanitary landfill is disposed; The ultimate disposal and the recycling that are unfavorable for mud make mud later stage cost of disposal high.Existing adopt in the municipal sludge treatment process more; The water ratio of mud is reached about 50%, though the solid content of mud is high, the mud of handling is that the water ratio after the process belt filter press processed is about 80% mud; And the entire treatment complex process, processing cost is high.
Summary of the invention
The object of the present invention is to provide a kind of can passing through that municipal sewage sludge is implemented further modified and throwing out; Filter press dewatering then, thereby improve the sludge dewatering and drying method of the Sewage Plant primary sludge solid content that does not pass through the belt filter press processed.
The mud dewatering method that is used for municipal wastewater treatment plant of the present invention comprises the steps:
1) mud pre-treatment: get the municipal wastewater treatment plant primary sludge of water ratio more than 90% in container, stir;
2) add coagulant aids: in step 1) gained mud, add the mixing coagulant aids of rhombspar and unslaked lime, stir; The weight of said mixing coagulant aids is 2% ~ 10% of primary sludge solid content;
3) interpolation flocculation agent: to step 2) add inorganic flocculating agent in the gained mud, stir, adding weight again is the PAM flocculation agent of primary sludge solid content 0.1% ~ 0.5%, and after stirring, flocculation sediment is more than 5 minutes; The weight of said inorganic flocculating agent is 2% ~ 8% of primary sludge solid content;
4) sludge dewatering: step 3) gained mud is advanced mud to plate-and-frame filter press, mud is carried out press dewatering, keep-uped pressure 5-30 minute;
5) pressure release discharging.
The weight of mixing coagulant aids step 2) is 5% ~ 7% of primary sludge solid content.
Step 2) inorganic flocculating agent described in is inorganic molecules flocculation agent or inorganic polymer flocculant, and the weight of inorganic flocculating agent is 3% ~ 5% of primary sludge solid content.
Said inorganic molecules flocculation agent is aluminum soluble salt or molysite.
Said inorganic polymer flocculant is Poly aluminum Chloride (PAC) or polyaluminium sulfate.
The weight of the flocculation agent of PAM step 2) is 0.2% ~ 0.3% of primary sludge solid content.
Said inorganic molecules flocculation agent comprises aluminum soluble salt, molysite, calcium chloride etc., and said inorganic polymer flocculant comprises polyaluminium sulfate, Poly aluminum Chloride (PAC), activated silica etc.
Aluminum soluble salt comprises Tai-Ace S 150, aluminum chloride, aluminum nitrate etc. in the flocculation agent of inorganic molecules described in the present invention, and said soluble ferric iron salt comprises ferric sulfate, iron(ic)chloride, iron nitrate etc.
Said PAM flocculation agent comprises cationic PAM flocculation agent, anionic PAM flocculation agent and non-ionic type PAM flocculation agent, preferred cationic type PAM flocculation agent, and molecular weight can be 8,000,000-1,500 ten thousand.
Primary sludge of the present invention is not for to pass through the initial mud of belt filter press processed, and its water ratio is more than 90%.
The present invention is through implementing further modified and throwing out to municipal sewage sludge; Filter press dewatering then; Thereby effectively deviate from not pass through the moisture in the Sewage Plant primary sludge of belt filter press processed; And the treatment process process of mud dewatering method of the present invention is simple, and processing cost is low.
Embodiment
Embodiment 1
The dewatering that being used for of present embodiment handles municipal sludge; The weight of the mixing coagulant aids of rhombspar and unslaked lime is 7.0% of primary sludge solid content; The weight of inorganic flocculating agent Tai-Ace S 150 is 3.0% of primary sludge solid content, and the weight of cationic PAM is 0.3% of primary sludge solid content.
The described processing method of sludge dewatering of present embodiment specifically comprises the steps:
1) mud pre-treatment: 400 liters of municipal sewage sludges getting water ratio 97.50% stir with the speed of 25r/min in container.
2) add coagulant aids: in mud, add each rhombspar and unslaked lime of 0.35 kilogram respectively, with the speed of 50r/min, churning time is 5 minutes.
3) add flocculation agent: the inorganic flocculating agent Tai-Ace S 150 that adds 0.3 kilogram earlier; Speed with 50r/min stirred 5 minutes; Add massfraction and be 15 liters of the aqueous solution of 0.2% cationic PAM flocculation agent, continue to stir flocculation sediment 10 minutes 5 minutes with the speed of 25r/min.
4) sludge dewatering: utilize the filter pressure of 1.0MPa to advance mud, advanced that the pressure with 1.5MPa carries out press dewatering to mud behind the mud, keep-uped pressure 10 minutes to plate-and-frame filter press.
5) pressure release discharging, the water ratio of discharging mud is 56.78% after squeezing.
Embodiment 2
The dewatering that being used for of present embodiment handles municipal sludge, step 3) adopts the inorganic flocculating agent Poly aluminum Chloride (PAC), and other are with embodiment 1, and the water ratio that obtains mud is 55.07%.
Embodiment 3
The dewatering that being used for of present embodiment handles municipal sludge, step 3) add 10 liters of the aqueous solution that massfraction is 0.2% cationic PAM flocculation agent, and other are with embodiment 1, and the water ratio that obtains mud is 58.85%.
Embodiment 4
The dewatering that being used for of present embodiment handles municipal sludge, step 3) adopts the inorganic flocculating agent aluminum nitrate, and other are with embodiment 1, and the water ratio that obtains mud is 57.68%.
Embodiment 5
The dewatering that being used for of present embodiment handles municipal sludge, step 3) adopts inorganic flocculating agent ferric sulfate, and other are with embodiment 1, and the water ratio that obtains mud is 58.36%.
Embodiment 6
The dewatering that being used for of present embodiment handles municipal sludge, step 2) in mud, add each rhombspar and unslaked lime of 0.25 kilogram respectively, other are with embodiment 1, and the water ratio that obtains mud is 56.67%.
Embodiment 7
The dewatering that being used for of present embodiment handles municipal sludge, step 2) in mud, add each rhombspar and unslaked lime of 0.4 kilogram respectively, other are with embodiment 1, and the water ratio that obtains mud is 55.73%.
Embodiment 8
The dewatering that being used for of present embodiment handles municipal sludge, step 3) adds 0.5 kilogram inorganic flocculating agent Tai-Ace S 150, and other are with embodiment 1, and the water ratio that obtains mud is 56.43%.
Embodiment 9
The dewatering that being used for of present embodiment handles municipal sludge, step 3) adds 0.8 kilogram inorganic flocculating agent Tai-Ace S 150, and other are with embodiment 1, and the water ratio that obtains mud is 54.68%.
Embodiment 10
The dewatering that being used for of present embodiment handles municipal sludge, step 3) add 20 liters of the aqueous solution that massfraction is 0.25% cationic PAM flocculation agent, and other are with embodiment 1, and the water ratio that obtains mud is 57.63%.
Claims (6)
1. a mud dewatering method that is used for municipal wastewater treatment plant comprises the steps:
(1) mud pre-treatment: get the municipal wastewater treatment plant primary sludge of water ratio more than 90% in container, stir;
(2) add coagulant aids: in step 1) gained mud, add the mixing coagulant aids of rhombspar and unslaked lime, stir; The weight of said mixing coagulant aids is 2% ~ 10% of primary sludge solid content;
(3) interpolation flocculation agent: to step 2) add inorganic flocculating agent in the gained mud, stir, adding weight again is the PAM flocculation agent of primary sludge solid content 0.1% ~ 0.5%, and after stirring, flocculation sediment is more than 5 minutes; The weight of said inorganic flocculating agent is 2% ~ 8% of primary sludge solid content;
(4) sludge dewatering: step 3) gained mud is advanced mud to plate-and-frame filter press, mud is carried out press dewatering, keep-uped pressure 5-30 minute;
(5) pressure release discharging.
2. mud dewatering method as claimed in claim 1 is characterized in that: step 2) described in mix coagulant aids weight be 5% ~ 7% of primary sludge solid content.
3. mud dewatering method as claimed in claim 1 is characterized in that: step 2) described in inorganic flocculating agent be inorganic molecules flocculation agent or inorganic polymer flocculant, the weight of inorganic flocculating agent is 3% ~ 5% of primary sludge solid content.
4. mud dewatering method as claimed in claim 3 is characterized in that: said inorganic molecules flocculation agent is aluminum soluble salt or molysite.
5. mud dewatering method as claimed in claim 3 is characterized in that: said inorganic polymer flocculant is Poly aluminum Chloride (PAC) or polyaluminium sulfate.
6. mud dewatering method as claimed in claim 1 is characterized in that: step 2) described in the weight of PAM flocculation agent be 0.2% ~ 0.3% of primary sludge solid content.
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| CN2012101904019A CN102674657A (en) | 2012-06-11 | 2012-06-11 | Sludge dewatering method for urban sewage plant |
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| CN2012101904019A CN102674657A (en) | 2012-06-11 | 2012-06-11 | Sludge dewatering method for urban sewage plant |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214158A (en) * | 2013-05-09 | 2013-07-24 | 中冶华天工程技术有限公司 | Sludge dewatering method |
| CN103304114A (en) * | 2013-05-28 | 2013-09-18 | 北京工业大学 | Curing/stabilizing method for sludge from urban sewage treatment plant |
| CN103739182A (en) * | 2013-12-26 | 2014-04-23 | 浙江华章科技有限公司 | Dehydration method of heterogeneous sludge |
| CN104649458A (en) * | 2013-11-19 | 2015-05-27 | 江苏昌鑫基础工程有限公司 | Novel separating method for mud slurry and muddy water |
| CN104671636A (en) * | 2015-01-30 | 2015-06-03 | 深圳市水务(集团)有限公司 | Deep dehydration conditioning medicament for sludge and application method of deep dehydration conditioning medicament |
| CN105645734A (en) * | 2016-03-09 | 2016-06-08 | 旌德县圣裕莹石加工有限公司 | Sludge dewatering and circulating equipment for fluorite tail pulp treatment and application of sludge dewatering and circulating equipment |
| CN106082584A (en) * | 2016-08-10 | 2016-11-09 | 山东华泰纸业股份有限公司 | A kind of proportioning process being applicable to pulping wastewater treatment sludge drying |
| CN107056014A (en) * | 2017-04-25 | 2017-08-18 | 李忠锋 | The quick anhydration system of sludge and method |
| CN108014527A (en) * | 2017-12-14 | 2018-05-11 | 安徽国祯环保节能科技股份有限公司 | A kind of efficient filter press |
| CN108409104A (en) * | 2018-04-20 | 2018-08-17 | 东莞市顶盛环保科技有限公司 | A kind of New Type of Sludge Dewatering agent |
| CN109354367A (en) * | 2018-12-05 | 2019-02-19 | 北京尚水清源水处理技术有限公司 | The method of pyrohydrolysis anaerobically digested sludge dehydration |
| CN110255836A (en) * | 2019-06-05 | 2019-09-20 | 路德环境科技股份有限公司 | Composition and sludge curing method for rapid curing municipal sludge |
| CN110746061A (en) * | 2019-10-30 | 2020-02-04 | 方小兵 | Sludge treatment method |
| CN111620539A (en) * | 2020-06-11 | 2020-09-04 | 昆明滇池水务股份有限公司 | Deep dehydration tempering method for sludge |
| CN112794621A (en) * | 2020-12-27 | 2021-05-14 | 同济大学 | Efficient sludge dewatering composite conditioning agent and application thereof |
| CN113816572A (en) * | 2021-09-18 | 2021-12-21 | 南昌大学 | Method for quickly dehydrating and curing foundation pit sludge |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103214158A (en) * | 2013-05-09 | 2013-07-24 | 中冶华天工程技术有限公司 | Sludge dewatering method |
| CN103304114A (en) * | 2013-05-28 | 2013-09-18 | 北京工业大学 | Curing/stabilizing method for sludge from urban sewage treatment plant |
| CN104649458A (en) * | 2013-11-19 | 2015-05-27 | 江苏昌鑫基础工程有限公司 | Novel separating method for mud slurry and muddy water |
| CN103739182A (en) * | 2013-12-26 | 2014-04-23 | 浙江华章科技有限公司 | Dehydration method of heterogeneous sludge |
| CN104671636A (en) * | 2015-01-30 | 2015-06-03 | 深圳市水务(集团)有限公司 | Deep dehydration conditioning medicament for sludge and application method of deep dehydration conditioning medicament |
| CN105645734A (en) * | 2016-03-09 | 2016-06-08 | 旌德县圣裕莹石加工有限公司 | Sludge dewatering and circulating equipment for fluorite tail pulp treatment and application of sludge dewatering and circulating equipment |
| CN106082584A (en) * | 2016-08-10 | 2016-11-09 | 山东华泰纸业股份有限公司 | A kind of proportioning process being applicable to pulping wastewater treatment sludge drying |
| CN107056014A (en) * | 2017-04-25 | 2017-08-18 | 李忠锋 | The quick anhydration system of sludge and method |
| CN108014527A (en) * | 2017-12-14 | 2018-05-11 | 安徽国祯环保节能科技股份有限公司 | A kind of efficient filter press |
| CN108409104A (en) * | 2018-04-20 | 2018-08-17 | 东莞市顶盛环保科技有限公司 | A kind of New Type of Sludge Dewatering agent |
| CN109354367A (en) * | 2018-12-05 | 2019-02-19 | 北京尚水清源水处理技术有限公司 | The method of pyrohydrolysis anaerobically digested sludge dehydration |
| CN110255836A (en) * | 2019-06-05 | 2019-09-20 | 路德环境科技股份有限公司 | Composition and sludge curing method for rapid curing municipal sludge |
| CN110746061A (en) * | 2019-10-30 | 2020-02-04 | 方小兵 | Sludge treatment method |
| CN111620539A (en) * | 2020-06-11 | 2020-09-04 | 昆明滇池水务股份有限公司 | Deep dehydration tempering method for sludge |
| CN112794621A (en) * | 2020-12-27 | 2021-05-14 | 同济大学 | Efficient sludge dewatering composite conditioning agent and application thereof |
| CN113816572A (en) * | 2021-09-18 | 2021-12-21 | 南昌大学 | Method for quickly dehydrating and curing foundation pit sludge |
| CN113816572B (en) * | 2021-09-18 | 2023-04-07 | 南昌大学 | Method for quickly dehydrating and curing foundation pit sludge |
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Application publication date: 20120919 |