CN102180583A - Technique for conditioning sludge by using synergic action of Fenton reagent and polyacrylamide - Google Patents
Technique for conditioning sludge by using synergic action of Fenton reagent and polyacrylamide Download PDFInfo
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- CN102180583A CN102180583A CN 201110087907 CN201110087907A CN102180583A CN 102180583 A CN102180583 A CN 102180583A CN 201110087907 CN201110087907 CN 201110087907 CN 201110087907 A CN201110087907 A CN 201110087907A CN 102180583 A CN102180583 A CN 102180583A
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Abstract
The invention discloses a 'technique for conditioning sludge by using the synergic action of Fenton reagent and polyacrylamide', and mainly aims to overcome the defects in sludge dehydration conditioning of urban sewage treatment plants at present. The invention provides a sludge conditioning combined technical process which can effectively degrade organic substances, realize sludge reduction, effectively release combined water and cell internal water difficult to be dehydrated in the sludge and improve the dehydration performance of the sludge. In the technique, the oxidizing action of the Fenton reagent and the strong flocculation of CPAM (cationic polyacrylamide) are fully combined and used to enhance the dehydration performance of the sludge and improve the solid-liquid separation ratio in sludge dehydration. Through conditioning, the water content of the sludge after centrifugal dehydration is reduced from 87.7 percent to 79.3 percent, and the mud cake output is reduced from 0.218t/m<3> to 0.128t/m<3>.
Description
Technical field
The invention belongs to environmental engineering and sludge treatment engineering field, and be absorbed in a kind of Fenton reagent and polyacrylamide synergy sludge conditioning technology.
Background technology
Along with the increase year by year of China's sludge yield, the mud outlet becomes a great problem that many cities face.The water ratio of mud is high, and dewatering is poor, and difficulty that the mud subsequent disposal is disposed and expense increase severely.At present through mechanical dehydration, the water ratio of mud mud cake does not reach the requirement that subsequent disposal is disposed usually, becomes restriction sludge reduction, innoxious, principal element that recycling treatment is disposed, therefore, improve dewatering performance of sludge, reduce moisture percentage in sewage sludge, become an important research project.
Sludge conditioning can change the physics and the chemical property of mud, thereby improves the dewatering of mud, the water ratio after the reduction sludge dewatering.Sludge Chemical Conditioning is simple to operate because of it, expense low and effect stability is widely used.Cationic polyacrylamide (CPAM) was to use the most a kind of flocculation formulation chemical amendment during city sewage and sludge was handled, and it is simple to operate in using, and is more efficient than inorganic flocculating agent, dosage is little and effect stability.But because mud particularly contains a large amount of microorganism cellss and extracellular polymeric (EPS) in the active sludge, cell interior water and EPS surface-bonded water are difficult to discharge by the conditioning of CPAM, become the key factor that hinders dewatering performance of sludge.
Along with scientific-technical progress, technology such as chemical oxidation also are applied to improve the dewatering of mud.Oxygenant Fenton (Fenton) reagent has degradation of organic substances, dissolves and cracks EPS, cell walls, realizes the decrement of mud and improves dewatering performance of sludge.As application number is 201010000269.1, name is called a kind of biological acidification-Fenton-like oxidation coupling and improves the method for excess sludge dewatering, publication number is CN101759337A, under the condition that adds the capacity substrate, cultivates the indigenous acidification bacteria of domestication as inoculation liquid from mud; Inoculation liquid is joined in the excess sludge, under aerobic, stirring and appropriate amount of substrate condition mud is carried out biological acidification, utilize Fenton reagent that mud is carried out oxidation then, the pH that adds Ca (OH) 2 adjusting mud has again improved dewatering performance of sludge to neutral.But this method needs in advance mud to be carried out acidifying, and the preprocessing process mud handling capacity before the sludge conditioning is big, operates wayward.
Utilize the Fenton reagent oxidation to utilize the mode of CPAM flocculation that mud is nursed one's health then, one side can utilize the oxygenizement of Fenton reagent thoroughly to change the structure of mud, discharge cell interior water and EPS surface-bonded water, improve the dewatering of mud greatly; Can further utilize the strong throwing out of CPAM on the other hand, little and dispersive mud granule flocculates with the particle after the oxidation, improves sludge dewatering solid-liquid separation ratio.And directly mud is carried out acidifying by mineral acid, can shorten the mud acidifying time greatly.In summary, Fenton reagent and polyacrylamide are worked in coordination with usefulness, can significantly improve dewatering performance of sludge, form more excellent mud form and improve the effect that the subsequent disposal of mud is disposed.
Summary of the invention
This patent invention is at sludge from wastewater treatment plant water ratio height, and dewatering is poor, and the dehydrated sludge moisture content of the cake can not satisfy subsequent disposal and dispose the present situation that requires, and provides a kind of Fenton reagent and polyacrylamide to work in coordination with sludge conditioning combination technique technology.By Fenton reagent oxidation unit and CPAM flocculate unitary design and control, make this combination technique technology can effectively realize sludge reduction, improve the technology of dewatering performance of sludge, and dispose for the subsequent disposal of mud more excellent mud form is provided.
This patent invention is characterised in that, utilize the oxygenizement of Fenton reagent, degradation of organic substances, microorganism cells and extracellular polymeric EPS in dissolving and the breaking sludge, on the one hand mud there are sterilization, deodorization, because cell interior water and EPS surface-bonded water are released, improve the dewatering of mud greatly on the other hand; Utilize the strong throwing out of CPAM simultaneously, the mud that the structure that will be formed after the Fenton reagent oxidation is disperseed, grain diameter is little, specific surface area is big is flocculation effectively, strengthens the dewatering of mud, and improves the solid-liquid separation ratio in the sludge dewatering.
The main purpose of this patent invention is to overcome the deficiency that exists in the present sludge from wastewater treatment plant dehydrating and conditioning, a kind of effectively degradation of organic substances is provided, realize sludge reduction, and effectively discharge combination water and the cell interior water that is difficult in the mud deviate from, improve the sludge conditioning combination technique technology of dewatering performance of sludge.Compared with prior art, the art of this patent has the following advantages:
(1) effectively improves dewatering performance of sludge.The present invention adopts Fenton reagent and the collaborative sludge conditioning combination technique technology of polyacrylamide, gives full play to two kinds of amendments advantage separately, effectively improves the structure and the character of mud, improves the dewatering of mud, and has increased the solid-liquid separation ratio of sludge dewatering.
(2) the sludge reduction effect is obvious.Because the strong oxidizing property effect of Fenton reagent can effectively reduce the SS in the mud, directly reduces follow-up mud handling capacity.
(3) comprehensive cost is cheap.Because of the minimizing of mud SS and the reduction of moisture percentage in sewage sludge, dehydrated sludge transportation and processing costs reduce.And, use medicament expense that Fenton reagent increased with the reduction of increasing amount much smaller than subsequent transportation of bringing because of mud decrement and processing costs.
(4) structures are few, and operation is simple, easy handling.
Description of drawings
Accompanying drawing 1 is the artwork of Fenton reagent of the present invention and polyacrylamide synergy sludge conditioning technology.
Accompanying drawing 2 is concentration basin mud, the mud after Fenton reagent is nursed one's health and the microcosmic mud form comparison diagram after Fenton reagent of the present invention and the collaborative sludge conditioning technology conditioning of polyacrylamide.
Embodiment
Below describe principle of work of the present invention and embodiment in detail:
Dewatering performance of sludge conditioning combination technique technology of the present invention, make full use of Fenton reagent and CPAM advantage separately, organism in the efficient oxidation degraded mud, discharge combination water and cell interior water, and effectively little and dispersive mud flocculates with particle, strengthen the dewatering of mud, and improve the solid-liquid separation ratio in the sludge dewatering.The present invention realizes sludge reduction, and improves dewatering performance of sludge that disposing for follow-up sludge treatment provides more excellent mud form under the best of breed processing condition in conjunction with the throwing out of the oxygenizement of Fenton reagent and CPAM.
The process of its operation as shown in Figure 1, through spissated mud acidified after, be delivered to the Fenton reagent oxidation pond, mud reacts with Fenton reagent and oxidized under the stirring action that continues in oxidation pond; When Fenton's reaction fully after, add CPAM to the mud conditioning of flocculating, and be delivered to mechanical dewatering equipment and dewater; Mud mud cake after dehydration outward transport is at last further handled, and reduces subsequent disposal disposal amount and processing costs greatly, and the moisture of deviating from then returns Sewage treatment systems and further handles.
Embodiment 1
The process of its operation as shown in Figure 1, the mud of concentration basin is (pH=5) after the mineral acid acidifying, is delivered to Fenton reagent oxidation pond (H
2O
2Dosage is 2g/L, FeSO
4Dosage is 2.4g/L, reacts 1 hour), mud is under the stirring action that continues in oxidation pond, react with Fenton reagent, organism is degraded in the mud, and extracellular polymeric in cell walls and the mud (EPS) is dissolved and crack, and a large amount of cell interior water and EPS combination water are released; When Fenton's reaction fully after, to the mud conditioning (C8050 adds and is that 75mg/L, alr mode are that 400rpm stirs behind the 30s with 60rpm stirring 5min) of flocculating, the dispersion fine particle in the mud is adsorbed flocculation, realizes good mud-water separation with CPAM; Mud is transported to mechanical dewatering equipment and dewaters then; Mud mud cake after dehydration outward transport is at last further handled, and the moisture of deviating from then returns Sewage treatment systems and further handles.
Certain sewage work, design discharge is 100,000 t/d, water inlet is 60,000 t/d at present, adopts A2/O oxidation ditch water technology.Sanitary sewage accounts for 70%～80% in the water inlet, and trade effluent mainly is the waste water of Electronics Factory, copper zinc Electroplate Factory, the generation of hair long battery production factory.This factory's concentration basin moisture percentage in sewage sludge is that water ratio is 96.3% at present, and dehydration back moisture content of the cake is 87.7%.This factory adopts Fenton reagent and polyacrylamide to work in coordination with the sludge conditioning technology, technical process as shown in Figure 1, shown in the every index of the mud table 1:
Certain sewage work's concentration basin mud of table 1 is the every index of mud before and after Fenton reagent and the collaborative conditioning of polyacrylamide
Accompanying drawing 2 is a mud microgram before and after the collaborative conditioning of Fenton reagent and CPAM.
Claims (1)
1. the collaborative sludge conditioning technology of Fenton reagent and polyacrylamide, it is characterized in that: the oxygenizement of utilizing Fenton reagent, microorganism cells and extracellular polymeric EPS in dissolving and the breaking sludge, on the one hand mud there are sterilization, deodorization, because cell interior water and EPS surface-bonded water are released, improve the dewatering of mud greatly on the other hand; Utilize the strong throwing out of CPAM simultaneously, the effective rice that flocculated of the mud that the structure that will be formed after the Fenton reagent oxidation is disperseed, grain diameter is little, specific surface area is big strengthens the dewatering of mud, and improves the solid-liquid separation ratio in the sludge dewatering.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110087907 CN102180583A (en) | 2011-04-08 | 2011-04-08 | Technique for conditioning sludge by using synergic action of Fenton reagent and polyacrylamide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110087907 CN102180583A (en) | 2011-04-08 | 2011-04-08 | Technique for conditioning sludge by using synergic action of Fenton reagent and polyacrylamide |
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| CN102180583A true CN102180583A (en) | 2011-09-14 |
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| CN 201110087907 Pending CN102180583A (en) | 2011-04-08 | 2011-04-08 | Technique for conditioning sludge by using synergic action of Fenton reagent and polyacrylamide |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910793A (en) * | 2012-11-12 | 2013-02-06 | 北京师范大学 | Joint-conditioning dehydration method for sludge |
| CN103723906A (en) * | 2013-12-20 | 2014-04-16 | 湖南大学 | Deep dehydration recycling method for livestock and poultry feces |
| CN103880260A (en) * | 2014-02-13 | 2014-06-25 | 陕西延长石油（集团）有限责任公司永坪炼油厂 | Conditioning process for oil-refining sludge with high viscosity and high oil content |
| CN104129899A (en) * | 2013-05-03 | 2014-11-05 | 新昌县中发环保材料有限公司 | Sludge modifying agent |
| CN104973741A (en) * | 2015-07-01 | 2015-10-14 | 新奥科技发展有限公司 | Sludge pretreatment method |
| CN105174676A (en) * | 2015-09-30 | 2015-12-23 | 沈阳建筑大学 | Electro-Fenton source sludge reduction method and system based on electrochemical sludge pretreatment |
| CN106587560A (en) * | 2017-01-10 | 2017-04-26 | 广东工业大学 | New application of short-term anaerobic digestion in sludge dewatering |
| CN106746483A (en) * | 2017-02-10 | 2017-05-31 | 周毅 | The agent of compound type sludge decrement, preparation method and applications |
| CN107089787A (en) * | 2017-05-23 | 2017-08-25 | 北京尚水清源水处理技术有限公司 | A kind of sludge water from water works separation of solid and liquid safe reuse method |
| CN108178491A (en) * | 2017-12-20 | 2018-06-19 | 华侨大学 | A kind of method for improving sewage treatment plant residual active sludge dewatering |
| CN108409091A (en) * | 2018-02-13 | 2018-08-17 | 太原理工大学 | The method that Fenton-type reagent combination Amphiphatic high polymer coagulant based on biological nano iron carries out sludge dewatering |
| CN108558177A (en) * | 2018-02-13 | 2018-09-21 | 太原理工大学 | A kind of method of Amphiphatic high polymer coagulant combination biological nano Zero-valent Iron conditioning sludge |
| CN109020044A (en) * | 2017-06-08 | 2018-12-18 | 中国石油天然气股份有限公司 | A kind of method of wastewater treatment and mud decrement |
| CN110590118A (en) * | 2019-09-02 | 2019-12-20 | 深圳市深创环境工程技术有限公司 | Deep dehydration method for chemical conditioning of sludge garbage and dehydration system |
| CN110590121A (en) * | 2019-08-30 | 2019-12-20 | 中山大学 | Sludge dehydrating agent and sludge dehydrating method |
| CN110981160A (en) * | 2019-12-23 | 2020-04-10 | 广东慧信环保有限公司 | Novel composite sludge dehydrating agent and preparation and use methods thereof |
| CN111362536A (en) * | 2020-03-13 | 2020-07-03 | 辽宁大学 | Application of Fenton-flocculation combined conditioning method in urban domestic sludge dewatering |
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| JP2005510354A (en) * | 2001-11-29 | 2005-04-21 | コーポレイション バイオリックス | Methods for stabilizing and treating urban and industrial wastewater sludge |
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Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910793A (en) * | 2012-11-12 | 2013-02-06 | 北京师范大学 | Joint-conditioning dehydration method for sludge |
| CN104129899A (en) * | 2013-05-03 | 2014-11-05 | 新昌县中发环保材料有限公司 | Sludge modifying agent |
| CN103723906A (en) * | 2013-12-20 | 2014-04-16 | 湖南大学 | Deep dehydration recycling method for livestock and poultry feces |
| CN103723906B (en) * | 2013-12-20 | 2015-01-14 | 湖南大学 | Deep dehydration recycling method for livestock and poultry feces |
| CN103880260A (en) * | 2014-02-13 | 2014-06-25 | 陕西延长石油（集团）有限责任公司永坪炼油厂 | Conditioning process for oil-refining sludge with high viscosity and high oil content |
| CN104973741A (en) * | 2015-07-01 | 2015-10-14 | 新奥科技发展有限公司 | Sludge pretreatment method |
| CN105174676B (en) * | 2015-09-30 | 2017-09-22 | 沈阳建筑大学 | Electric Fenton source sludge reduction method and system based on electrochemistry sludge pretreatment |
| CN105174676A (en) * | 2015-09-30 | 2015-12-23 | 沈阳建筑大学 | Electro-Fenton source sludge reduction method and system based on electrochemical sludge pretreatment |
| CN106587560B (en) * | 2017-01-10 | 2020-04-28 | 广东工业大学 | Novel application of short-term anaerobic digestion in sludge dewatering |
| CN106587560A (en) * | 2017-01-10 | 2017-04-26 | 广东工业大学 | New application of short-term anaerobic digestion in sludge dewatering |
| CN106746483A (en) * | 2017-02-10 | 2017-05-31 | 周毅 | The agent of compound type sludge decrement, preparation method and applications |
| CN107089787A (en) * | 2017-05-23 | 2017-08-25 | 北京尚水清源水处理技术有限公司 | A kind of sludge water from water works separation of solid and liquid safe reuse method |
| CN109020044A (en) * | 2017-06-08 | 2018-12-18 | 中国石油天然气股份有限公司 | A kind of method of wastewater treatment and mud decrement |
| CN108178491A (en) * | 2017-12-20 | 2018-06-19 | 华侨大学 | A kind of method for improving sewage treatment plant residual active sludge dewatering |
| CN108178491B (en) * | 2017-12-20 | 2021-04-30 | 华侨大学 | Method for improving dehydration performance of residual activated sludge of sewage treatment plant |
| CN108558177A (en) * | 2018-02-13 | 2018-09-21 | 太原理工大学 | A kind of method of Amphiphatic high polymer coagulant combination biological nano Zero-valent Iron conditioning sludge |
| CN108409091A (en) * | 2018-02-13 | 2018-08-17 | 太原理工大学 | The method that Fenton-type reagent combination Amphiphatic high polymer coagulant based on biological nano iron carries out sludge dewatering |
| CN110590121A (en) * | 2019-08-30 | 2019-12-20 | 中山大学 | Sludge dehydrating agent and sludge dehydrating method |
| CN110590118A (en) * | 2019-09-02 | 2019-12-20 | 深圳市深创环境工程技术有限公司 | Deep dehydration method for chemical conditioning of sludge garbage and dehydration system |
| CN110981160A (en) * | 2019-12-23 | 2020-04-10 | 广东慧信环保有限公司 | Novel composite sludge dehydrating agent and preparation and use methods thereof |
| CN111362536A (en) * | 2020-03-13 | 2020-07-03 | 辽宁大学 | Application of Fenton-flocculation combined conditioning method in urban domestic sludge dewatering |
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Application publication date: 20110914 |