CN109879578A - A kind of dehydrating residual active sludge filter aid and its application - Google Patents
A kind of dehydrating residual active sludge filter aid and its application Download PDFInfo
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- CN109879578A CN109879578A CN201910194922.3A CN201910194922A CN109879578A CN 109879578 A CN109879578 A CN 109879578A CN 201910194922 A CN201910194922 A CN 201910194922A CN 109879578 A CN109879578 A CN 109879578A
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- bagasse
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
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Abstract
The invention discloses a kind of dehydrating residual active sludge filter aid and its application, filter aid is selected from least one of grafting extruding bagasse, sugarcane chaff.Filter aid in the present invention is greatly improved filters pressing effect and efficiency, and dewatered mud cake moisture and filtered juice CODcr are reduced, and entire pressure-filtering process is smooth, and equipment is simple, small investment, and safety is easy to operate, has good economic benefit and extensive social benefit.The filter cake that dewatering obtains in the present invention can be used for preparing water body purifying material, and by residual active sludge in sewage disposal process, this problem switchs to the method for solving sewage treatment, turns waste into wealth, forms closed cycle, realize residual active sludge resource utilization.The filter cake that dewatering obtains in the present invention can also be used to prepare biological organic fertilizer, realize residual active sludge resource utilization.
Description
Technical field
The present invention relates to residual active sludges to handle processing technology field, in particular to a kind of dehydrating residual active sludge helps
Filtering agent and its application.
Background technique
Activated sludge process is a kind of widely used sewage disposal technology, it can remove deliquescent and colloid from sewage
The biochemical organic matter of state and suspended solid etc. by activated sludge absorption, but a large amount of residues can be generated during processing
Activated sludge.Residual active sludge is a kind of to be made of extremely organic substance relic, microorganism, inorganic particle and colloid etc.
Complicated heterogeneous body, main component is biosolids, i.e., by the xenogeneic subjects such as bacterium class, Mycophyta, protozoan group institute
The mixture of composition.In addition, also containing most of organic matter in excess sludge, wherein about containing 60%~70% crude protein
Matter, 25% or so carbohydrate.Residual active sludge capacity is big, easily corruption, foul smelling, if processing is bad, it will make
At large-scale secondary pollution, how science, which is dealt carefully with these residual active sludges and had become in sewage disposal process, is urgently solved
Certainly the problem of.
Residual active sludge processing method mainly has concentration, digestion, dehydration, drying etc..Wherein, sludge dewatering is to utilize row
Water or the method for filtering make wet mud be converted into a kind of processing method of semisolid or solid-state clod, and dewatered sludge generally compares
The sludge of concentration or liquid is easy storing.Dewatering type is mainly mechanical dehydration at present, but due to residual active sludge organic matter
The features such as content is high, partial size is small, hydrophilicity is high, dewatering is poor causes filters pressing difficulty, the rate of filtration in filters pressing slow, de-
Mud cake water content is high after water, a large amount of places is needed to carry out secondary airing, easily cause secondary pollution problems, has seriously affected sludge fortune
Defeated storage and subsequent disposition.
Solve the problems, such as this key be improve dewatering performance of sludge, improve sludge dewatering efficiency, reduce moisture content of the cake,
Reduce sludge volume.Existing published technical solution mostly uses the thinking of conditioner conditioning sludge, is primarily directed to and dirt
Mud particle combines stronger absorption water and internal water, it is therefore an objective to will be converted into Free water in conjunction with water as far as possible.The tune of use
Managing agent is mostly high polymer coagulant polyacrylamide, calcium oxide, coal dust etc..But above-mentioned conditioner, there are over dry mud amount increase, at
The problems such as this height, mud granule easily block.
In view of this, the present invention is specifically proposed.
Summary of the invention
The purpose of the present invention is to provide a kind of dehydrating residual active sludge filter aid and its applications.
The technical solution used in the present invention is:
A kind of dehydrating residual active sludge filter aid, filter aid are selected from least one of grafting extruding bagasse, sugarcane chaff.
Further, the mass ratio that extruding bagasse and sugarcane chaff are grafted in filter aid is (15~30): 1.
Further, be grafted extruding bagasse preparation method the following steps are included:
1) bagasse is dry, controls bagasse moisture≤55%；
2) bagasse after drying carries out grafting expanding treatment, comprising the following steps:
A) bagasse and NaOH, cationic polyacrylamide, crosslinking agent (10000~20000) in mass ratio: (5~20):
(10~100): (1~10) is uniformly mixed, and using airflow puffing technique, swelling temperature is 150 DEG C~220 DEG C, pressure 0.5MPa
~2.5MPa, 2~15min of puffing time obtain bagasse A；
B) bagasse and NaOH, anionic polyacrylamide, crosslinking agent (10000~20000) in mass ratio: (5~20):
(10~100): (1~10) is uniformly mixed, and using airflow puffing technique, swelling temperature is 150 DEG C~220 DEG C, pressure 0.5MPa
~2.5MPa, 2~15min of puffing time obtain bagasse B；
C) bagasse A and bagasse B is in proportion (1~3): (1~3) mixing obtains grafting extruding bagasse；
The NaOH is solid NaOH, and the crosslinking agent is short chain fatty acids esters.
A kind of residual active sludge press-filtering dehydration method uses above-mentioned dehydrating residual active sludge filter aid.
Further, residual active sludge press-filtering dehydration method comprises the following steps that:
1) residual active sludge carries out concentration in concentration basin；
2) above-mentioned dehydrating residual active sludge filter aid is added after sludge digestion, stirs evenly；
3) sludge that filter aid is added is delivered in filter press and carries out filter-press dehydration.
Further, in step 1) concentrated processing sludge moisture content≤95%.
Further, the mass ratio of sludge and filter aid is (5~15) in step 2): 1.
A kind of water body purifying material, it is by above-mentioned residual active sludge press-dehydrating method that residual activity is dirty for preparing raw material
The filter cake obtained after mud filter-press dehydration.
Further, water body purifying material is obtained after being carbonized by filter cake.
A kind of biological organic fertilizer, preparing raw material is by above-mentioned residual active sludge press-dehydrating method by residual active sludge
The filter cake obtained after filter-press dehydration.
The beneficial effects of the present invention are:
The present invention is big for residual active sludge viscosity, filtering is difficult, contains the features such as positive and negative colloid, to sugar refinery by-product sugarcane
Slag carries out grafting extruding, and grafting processing makes excellent flocculating properties of the bagasse with polyacrylamide, and expanding treatment then makes bagasse
Rapid expanding increases pulp freeness, enhances its adsorption capacity, meanwhile, under conditions of puffing process high temperature and pressure,
Sugarcane fiber generates free radical, and carries out graft crosslinking with polyacrylamide under the action of crosslinking agent, makes reaction can be shorter
Time in can reach preferable graft effect；Bagasse after being grafted extruding combines polyacrylamide and extruding bagasse
Characteristic is added in residual active sludge as filter aid, can substantially improve the flocculating effect and dewatering of sludge, and pressing
Filter cake is formed during filter, greatly improves filters pressing effect and efficiency, and dewatered mud cake moisture and filtered juice CODcr are reduced, entirely
Pressure-filtering process is smooth, and equipment is simple, small investment, and safety is easy to operate, has good economic benefit and extensive society's effect
Benefit.
The filter cake that dewatering obtains in the present invention can be used for preparing water body purifying material, and filter cake is aqueous few, can reduce water
Hot carbonization treatment energy consumption, filter cake are mainly bagasse and sludge, and biomass is abundant, and bagasse passes through expanding treatment, in hydrothermal carbonization
Carbonisation can be strengthened in the process, so that the Carbon Materials of preparation are porous containing a large amount of oxygen-containing groups, it is the ideal material of water body purification
Material；By residual active sludge in sewage disposal process, this problem switchs to the method for solving sewage treatment, turns waste into wealth, formation is closed
Road circulation, realizes residual active sludge resource utilization.
The filter cake that dewatering obtains in the present invention can also be used to prepare biological organic fertilizer, realize residual active sludge money
Sourceization utilizes.
Specific embodiment
Enumerate embodiment further below with the present invention will be described in detail.It will similarly be understood that following embodiment is served only for this
Invention is further described, and should not be understood as limiting the scope of the invention, those skilled in the art are according to the present invention
Some nonessential modifications and adaptations that the principle of elaboration is made all belong to the scope of protection of the present invention.Following specific works of example
Skill parameter etc. is also only an example in OK range, i.e. those skilled in the art can do suitable model by the explanation of this paper
Interior selection is enclosed, and does not really want to be defined in hereafter exemplary specific data.
Embodiment 1
A kind of grafting extruding bagasse, preparation method are as follows:
1) bagasse is dry, controls bagasse moisture≤55%；
2) bagasse after drying carries out grafting expanding treatment:
A) bagasse mixes with NaOH (solid), cationic polyacrylamide, crosslinking agent 2000:4:20:1 in mass ratio
Even, using airflow puffing technique, swelling temperature is 200 DEG C, pressure 1MPa, puffing time 4min and obtains bagasse A；
B) bagasse mixes with NaOH (solid), anionic polyacrylamide, crosslinking agent 2000:4:20:1 in mass ratio
Even, using airflow puffing technique, swelling temperature is 200 DEG C, pressure 1MPa, puffing time 4min and obtains bagasse B；
C) 1:3 is mixed bagasse A and bagasse B in proportion, obtains grafting extruding bagasse；
The crosslinking agent is short chain fatty acids esters.
A kind of dehydrating residual active sludge filter aid, by above-mentioned grafting extruding bagasse and sugarcane chaff with mass ratio 20:1 mixing and
At.
A kind of residual active sludge press-filtering dehydration method, comprises the following steps that:
1) residual active sludge carries out concentration, sludge moisture content≤95% of concentrated processing in concentration basin；
2) it pumps after sludge digestion to the stirring pool for having agitating device, above-mentioned dehydrating residual active sludge filter aid is added
It is uniformly mixed, stirring 1h, the mass ratio of sludge and filter aid is 10:1；
3) sludge that filter aid is added is delivered in filter press and carries out filter-press dehydration.
Moisture percentage in sewage sludge is 45% after filter-press dehydration, filters pressing water CODCrIt is 40.
Embodiment 2
A kind of grafting extruding bagasse, preparation method are as follows:
1) bagasse is dry, controls bagasse moisture≤55%；
2) bagasse after drying carries out grafting expanding treatment:
A) bagasse and NaOH (solid), cationic polyacrylamide, crosslinking agent are uniformly mixed in 4000:4:20:1 ratio,
Using airflow puffing technique, swelling temperature is 200 DEG C, pressure 1MPa, puffing time 4min and obtains bagasse A；
B) bagasse and NaOH (solid), anionic polyacrylamide, crosslinking agent are uniformly mixed in 4000:4:20:1 ratio,
Using airflow puffing technique, swelling temperature is 200 DEG C, pressure 1MPa, puffing time 4min and obtains bagasse B；
C) 1:3 is mixed bagasse A and bagasse B in proportion, obtains grafting extruding bagasse；
The crosslinking agent is short chain fatty acids esters.
A kind of dehydrating residual active sludge filter aid obtains grafting extruding bagasse and sugarcane chaff is mixed with mass ratio 20:1 by above-mentioned
It closes.
A kind of residual active sludge press-filtering dehydration method, comprises the following steps that:
1) residual active sludge carries out concentration, sludge moisture content≤95% of concentrated processing in concentration basin；
2) it pumps after sludge digestion to the stirring pool for having agitating device, above-mentioned dehydrating residual active sludge filter aid is added
It is uniformly mixed, stirring 1h, the mass ratio of sludge and filter aid is 10:1；
3) sludge that filter aid is added is delivered in filter press and carries out filter-press dehydration.
Moisture percentage in sewage sludge is 50% after filter-press dehydration, filters pressing water CODCrIt is 60.
Embodiment 3
A kind of grafting extruding bagasse, preparation method are as follows:
1) bagasse is dry, controls bagasse moisture≤55%,
2) bagasse after drying carries out grafting expanding treatment:
A) bagasse and NaOH (solid), cationic polyacrylamide, crosslinking agent are uniformly mixed in 2000:4:20:1 ratio,
Using airflow puffing technique, swelling temperature is 200 DEG C, pressure 1MPa, puffing time 4min and obtains bagasse A；
B) bagasse and NaOH (solid), anionic polyacrylamide, crosslinking agent are uniformly mixed in 2000:4:20:1 ratio,
Using airflow puffing technique, swelling temperature is 200 DEG C, pressure 2MPa, puffing time 4min and obtains bagasse B；
C) 1:3 is mixed bagasse A and bagasse B in proportion, obtains grafting extruding bagasse；
The crosslinking agent is short chain fatty acids esters.
A kind of dehydrating residual active sludge filter aid, by above-mentioned grafting extruding bagasse and sugarcane chaff with mass ratio 20:1 mixing and
At.
A kind of residual active sludge press-filtering dehydration method, comprises the following steps that:
1) residual active sludge carries out concentration, sludge moisture content≤95% of concentrated processing in concentration basin；
2) it pumps after sludge digestion to the stirring pool for having agitating device, above-mentioned dehydrating residual active sludge filter aid is added
It is uniformly mixed, stirring 1h, the mass ratio of sludge and filter aid is 10:1；
3) sludge that filter aid is added is delivered in filter press and carries out filter-press dehydration.
Moisture percentage in sewage sludge is 45% after filter-press dehydration, filters pressing water CODCrIt is 45.
Embodiment 4
A kind of grafting extruding bagasse, preparation method are as follows:
1) bagasse is dry, controls bagasse moisture≤55%；
2) bagasse after drying carries out grafting expanding treatment:
A) bagasse and NaOH (solid), cationic polyacrylamide, crosslinking agent are uniformly mixed in 2000:4:20:1 ratio,
Using airflow puffing technique, swelling temperature is 200 DEG C, pressure 1MPa, puffing time 4min and obtains bagasse A；
B) bagasse and NaOH (solid), anionic polyacrylamide, crosslinking agent are uniformly mixed in 2000:4:20:1 ratio,
Using airflow puffing technique, swelling temperature is 200 DEG C, pressure 2MPa, puffing time 4min and obtains bagasse B；
C) 1:3 is mixed bagasse A and bagasse B in proportion, obtains grafting extruding bagasse；
The crosslinking agent is short chain fatty acids esters.
A kind of dehydrating residual active sludge filter aid, by above-mentioned grafting extruding bagasse and sugarcane chaff with mass ratio 20:1 mixing and
At.
A kind of residual active sludge press-filtering dehydration method, comprises the following steps that:
4) residual active sludge carries out concentration, sludge moisture content≤95% of concentrated processing in concentration basin；
5) it pumps after sludge digestion to the stirring pool for having agitating device, above-mentioned dehydrating residual active sludge filter aid is added
It is uniformly mixed, stirring 1h, the mass ratio of sludge and filter aid is 20:1；
6) sludge that filter aid is added is delivered in filter press and carries out filter-press dehydration.
Moisture percentage in sewage sludge is 55% after filter-press dehydration, filters pressing water CODCrIt is 58.
Embodiment 5
A kind of grafting extruding bagasse, preparation method are as follows:
1) bagasse is dry, controls bagasse moisture≤55%；
2) bagasse after drying carries out grafting expanding treatment:
A) bagasse and NaOH (solid), cationic polyacrylamide, crosslinking agent are uniformly mixed in 2000:4:20:1 ratio,
Using airflow puffing technique, swelling temperature is 200 DEG C, pressure 1MPa, puffing time 4min and obtains bagasse A；
B) bagasse and NaOH (solid), anionic polyacrylamide, crosslinking agent are uniformly mixed in 2000:4:20:1 ratio,
Using airflow puffing technique, swelling temperature is 200 DEG C, pressure 1MPa, puffing time 4min and obtains bagasse B；
C) 1:2 is mixed bagasse A and bagasse B in proportion, obtains grafting extruding bagasse；
The crosslinking agent is short chain fatty acids esters.
A kind of dehydrating residual active sludge filter aid, by above-mentioned grafting extruding bagasse and sugarcane chaff with mass ratio 20:1 mixing and
At.
A kind of residual active sludge press-filtering dehydration method, comprises the following steps that:
1) residual active sludge carries out concentration, sludge moisture content≤95% of concentrated processing in concentration basin；
2) it pumps after sludge digestion to the stirring pool for having agitating device, above-mentioned dehydrating residual active sludge filter aid is added
It is uniformly mixed, stirring 1h, the mass ratio of sludge and filter aid is 10:1；
3) sludge that filter aid is added is delivered in filter press and carries out filter-press dehydration.
Moisture percentage in sewage sludge is 43% after filter-press dehydration, filters pressing water CODCrIt is 53.
Claims (10)
1. a kind of dehydrating residual active sludge filter aid, it is characterised in that: it is swollen that dehydrating residual active sludge filter aid is selected from grafting
Change at least one of bagasse, sugarcane chaff.
2. dehydrating residual active sludge filter aid according to claim 1, it is characterised in that: dehydrating residual active sludge helps
The mass ratio that extruding bagasse and sugarcane chaff are grafted in filtering agent is (15~30): 1.
3. dehydrating residual active sludge filter aid according to claim 1, it is characterised in that: the preparation of grafting extruding bagasse
Method the following steps are included:
1) bagasse is dry, controls bagasse moisture≤55%；
2) bagasse after drying carries out grafting expanding treatment, comprising the following steps:
A) bagasse and NaOH, cationic polyacrylamide, crosslinking agent (10000~20000) in mass ratio: (5~20): (10~
100): (1~10) is uniformly mixed, and using airflow puffing technique, swelling temperature is 150 DEG C~220 DEG C, and pressure 0.5MPa~
2.5MPa, 2~15min of puffing time obtain bagasse A；
B) bagasse and NaOH, anionic polyacrylamide, crosslinking agent (10000~20000) in mass ratio: (5~20): (10~
100): (1~10) is uniformly mixed, and using airflow puffing technique, swelling temperature is 150 DEG C~220 DEG C, and pressure 0.5MPa~
2.5MPa, 2~15min of puffing time obtain bagasse B；
C) bagasse A and bagasse B is in proportion (1~3): (1~3) mixing obtains grafting extruding bagasse；
The NaOH is solid NaOH, and the crosslinking agent is short chain fatty acids esters.
4. a kind of residual active sludge press-filtering dehydration method, it is characterised in that: described in any item surplus using claims 1 to 33
Remaining activated sludge dehydration filter aid.
5. residual active sludge press-filtering dehydration method according to claim 4, it is characterised in that: walked including following technique
It is rapid:
1) residual active sludge carries out concentration in concentration basin；
2) the described in any item dehydrating residual active sludge filter aids of claims 1 to 3 are added after sludge digestion, stir evenly；
3) sludge that filter aid is added is delivered in filter press and carries out filter-press dehydration.
6. residual active sludge press-filtering dehydration method according to claim 5, it is characterised in that: concentrated place in step 1)
Sludge moisture content≤95% of reason.
7. residual active sludge press-filtering dehydration method according to claim 5 or 6, it is characterised in that: sludge in step 2)
Mass ratio with filter aid is (5~15): 1.
8. a kind of water body purifying material, it is characterised in that: preparing raw material is by the described in any item residues of claim 4~7
The filter cake that activated sludge press-dehydrating method will obtain after residual active sludge filter-press dehydration.
9. water body purifying material according to claim 8, it is characterised in that: obtained after being carbonized by filter cake.
10. a kind of biological organic fertilizer, it is characterised in that: it is described in any item remaining living by claim 4~7 for preparing raw material
The filter cake that property sludge press-dehydrating method will obtain after residual active sludge filter-press dehydration.
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| CN201910194922.3A CN109879578B (en) | 2019-03-14 | 2019-03-14 | Residual activated sludge dewatering filter aid and application thereof |
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| CN201910194922.3A CN109879578B (en) | 2019-03-14 | 2019-03-14 | Residual activated sludge dewatering filter aid and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111320355A (en) * | 2019-11-21 | 2020-06-23 | 佛山科学技术学院 | Preparation method of efficient flocculant for sludge dewatering |
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| CN102838198A (en) * | 2012-09-13 | 2012-12-26 | 江苏艾特克化学工业有限公司 | Preparation method of novel flocculant for sewage treatment |
| CN105060444A (en) * | 2015-08-14 | 2015-11-18 | 宁波保税区维迪克环保科技有限公司 | Papermaking wastewater treatment agent and manufacturing method thereof |
| CN106883349A (en) * | 2017-02-07 | 2017-06-23 | 广西科学院 | A kind of application of the preparation method and flocculant of flocculant |
| CN108840417A (en) * | 2018-07-06 | 2018-11-20 | 佛山市陵谐环保科技有限公司 | A kind of preparation method of food and drink waste water flocculant |
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2019
- 2019-03-14 CN CN201910194922.3A patent/CN109879578B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102838198A (en) * | 2012-09-13 | 2012-12-26 | 江苏艾特克化学工业有限公司 | Preparation method of novel flocculant for sewage treatment |
| CN105060444A (en) * | 2015-08-14 | 2015-11-18 | 宁波保税区维迪克环保科技有限公司 | Papermaking wastewater treatment agent and manufacturing method thereof |
| CN106883349A (en) * | 2017-02-07 | 2017-06-23 | 广西科学院 | A kind of application of the preparation method and flocculant of flocculant |
| CN108840417A (en) * | 2018-07-06 | 2018-11-20 | 佛山市陵谐环保科技有限公司 | A kind of preparation method of food and drink waste water flocculant |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111320355A (en) * | 2019-11-21 | 2020-06-23 | 佛山科学技术学院 | Preparation method of efficient flocculant for sludge dewatering |
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Address after: No.10, shiliugang Road, Haizhu District, Guangzhou City, Guangdong Province 510000 Patentee after: Institute of biological and medical engineering, Guangdong Academy of Sciences Address before: No.10, shiliugang Road, Haizhu District, Guangzhou City, Guangdong Province 510000 Patentee before: Institute of bioengineering, Guangdong Academy of Sciences |
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Address after: No.10, shiliugang Road, Haizhu District, Guangzhou City, Guangdong Province 510000 Patentee after: Institute of bioengineering, Guangdong Academy of Sciences Address before: 510316, 10, pomegranate Road, Guangzhou, Guangdong, Haizhuqu District Patentee before: GUANGDONG PROVINCIAL BIOENGINEERING INSTITUTE (GUANGZHOU SUGARCANE INDUSTRY RESEARCH INSTITUTE) |
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