CN105254153A - Potassium permanganate lysis/ferric chloride flocculation/biological carbon skeleton combined conditioning method for municipal sludge - Google Patents
Potassium permanganate lysis/ferric chloride flocculation/biological carbon skeleton combined conditioning method for municipal sludge Download PDFInfo
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- CN105254153A CN105254153A CN201510818726.0A CN201510818726A CN105254153A CN 105254153 A CN105254153 A CN 105254153A CN 201510818726 A CN201510818726 A CN 201510818726A CN 105254153 A CN105254153 A CN 105254153A
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Abstract
The invention discloses a potassium permanganate lysis/ferric chloride flocculation/biological carbon skeleton combined conditioning method for municipal sludge, belonging to the technical field of environmental management. The method comprises the step of feeding certain amounts of potassium permanganate, ferric chloride and biological carbon into excess sludge at a certain stirring speed according to a certain feeding sequence, so as to condition the municipal sludge, so that the dehydration property of the municipal sludge is improved. The method has the beneficial effects that the cost of conditioning agents is low, and the operation is simple; meanwhile, the sludge breakage, flocculating constituent reconstruction and filter cake skeleton structure construction are achieved by virtue of three conditioning agents, so that the dehydration property of the sludge is overall improved, and the limitations of a single method and the combination of two methods in the past are broken through; by virtue of combined conditioning of the three conditioning agents, the dehydration property of the sludge can be obviously improved, and the moisture content of dehydrated sludge reaches 62%-67%; the cost is low, and the process is simple. The method is significant for the solving of the pollution problem of sludge.
Description
Technical field
The invention belongs to technical field of environmental management, particularly a kind of potassium permanganate breaks the method for born of the same parents/iron(ic) chloride flocculation/biological carbon skeleton co-conditioning municipal sludge.
Background technology
Along with Economic development and people's living standard improve, the centralized sewage work of China major part urban construction, produces a large amount of excess sludges in sewage treatment process, and in the trend grown at top speed year by year.China's sludge treatment is due to many-sided reasons such as technology, economy, environment, society and laws, and the mud of about 80% sewage work can not get dealing carefully with disposal, causes serious secondary pollution.Excess sludge contains the moisture more than 97%, and therefore effective dehydration of mud is the key of sludge treatment.Excess sludge is as a kind of high-ductility fluid, and compressibility extreme difference, after Direct Dehydration, moisture percentage in sewage sludge is still more than 90%, therefore needs to improve its dewatering through conditioning.Therefore, for China's sludge characteristics, develop safe, efficient, economic novel mud strengthening conditioning technology extremely important.
Urban sludge conditioning processing method is a lot, can be divided into Physical, chemical method and biological process three major types substantially.Chemical conditioning in sludge conditioning method because having stronger suitability to the change of sludge quantity and sludge quality, and easy and simple to handle, effective, treatment cycle is short, investment working cost is low etc. is used widely.By adding certain flocculation agent in mud, as organic polyacrylamide, inorganic molysite and aluminium salt etc., chemical reaction is there is on sludge bacteria micelle surface, in and mud colloidal solid electric charge, destroy the colloidal state structure of mud, reduce the avidity between muddy water, adjustment floc particle group property and ordered state thereof, flco cohesive force is strengthened, and particle becomes large, and dewatering improves.By adding some inorganic or organic granulars in mud, as wood chip, flyash etc., as skeleton, mud cake can be made to keep porousness, reduce the compressibility of mud cake, thus improving the dewatering of mud.Because sludge bacteria micelle network structure is highly stable, a large amount of extracellular polymerics is there is in zoogloea, its main component has the polymer substances such as the saccharan of wetting ability and viscosity, protein, nucleic acid, lipid and DNA, and the existence of extracellular polymeric causes sludge dewatering difficulty.Therefore, adopt certain sludge disintegration method, mud flocculation structure can be made broken as ultrasonication, Fenton oxidation etc. and cause cell disintegration further, promoting the release of intracellular organic matter and moisture.Single sludge conditioning method action effect is limited, therefore, adopts co-conditioning method raising dewatering performance of sludge to become the study hotspot of sludge conditioning.
The people such as Luo Haijian have studied organic floculant cationic polyacrylamide and skeleton particle wood chip co-conditioning municipal sludge, the people such as Wang Dongsheng have studied enzyme and crack and inorganic flocculating agent co-conditioning municipal sludge, research shows, after two kinds of method co-conditioning mud, dewatering performance of sludge is better than the effect of single method conditioning, the former is owing to cracking in advance mud, the existence of a large amount of extracellular polymeric still hinders the further raising of dewatering performance of sludge, the latter does not add skeleton particle, in filter dehydration process, filter cake becomes more and more tightr, greatly hinder the circulation of moisture, therefore these two kinds of method co-conditioning mud also have some limitations.There is no at present and utilize mud to break born of the same parents-flco reconstruction-skeleton to set up the method that triple combination nurses one's health municipal sludge.This patent proposes to utilize potassium permanganate to break the method for born of the same parents/iron(ic) chloride flocculation/biological carbon skeleton co-conditioning municipal sludge, potassium permanganate is oxidized brokenly born of the same parents to mud, iron(ic) chloride is flocculated by electrostatic neutralizing effect again to the mud after broken born of the same parents, biological carbon forms skeleton structure in sludge filter cake, effective raising dewatering performance of sludge, has the benefit of good economy, society and environment.
Summary of the invention
Technical problem to be solved by this invention is: overcome the deficiency in existing sludge conditioning technology, provides that a kind of technique is simple, the potassium permanganate that utilizes of excellent effect breaks the method for born of the same parents/iron(ic) chloride flocculation/biological carbon skeleton co-conditioning municipal sludge.
For achieving the above object, the present invention is by the following technical solutions: first in mud, add potassium permanganate carries out brokenly born of the same parents to mud, moisture in release extracellular polymeric, inorganic flocculating agent iron(ic) chloride is added again in broken born of the same parents' mud, flco reconstruct is carried out to the particle of broken born of the same parents' mud, finally add biological carbon particle, in sludge filter cake, build skeleton structure, improve the dewatering of mud further.
The potassium permanganate that the present invention proposes breaks the method for born of the same parents/iron(ic) chloride flocculation/biological carbon skeleton conditioning municipal sludge, and concrete steps are as follows:
(1) under the agitation condition of 200-400r/min, in primary sludge, add the potassium permanganate of 15-25g/kg mud dry weight, stir 1-3min, carry out mud cell and crack;
(2) under the agitation condition of 200-400r/min, in the described broken born of the same parents' mud of step (1), continue the iron(ic) chloride adding 138-150g/kg mud dry weight, stir 1-3min, promote the growth of mud flco;
(3) under the agitation condition of 20-50r/min, in step (2) described flocculation sludge, continue the biological carbon adding 50%-80% mud dry weight, stir 2-6min, biological carbon promotes the water stream channel in sludge filter cake as skeleton;
(4) mud after step (3) described conditioning is carried out filter dehydration.
In the present invention, primary sludge described in step (1) is the excess sludge of sludge from wastewater treatment plant concentration basin, and described in step (1), potassium permanganate particles is technical grade.
In the present invention, described in step (2), iron(ic) chloride is technical grade.
In the present invention, biological carbon described in step (3) is the sludge organism carbon that excess sludge of municipal sewage plant pyrolysis under limited oxygen condition obtains, pyrolysis temperature is 350-450 DEG C, and pyrolysis time is 1-2h, and sludge organism carbon granule size is 200-300 μm.
The invention has the advantages that: amendment cost of the present invention is low, easily easy to operate, simultaneously, potassium permanganate breaks born of the same parents/iron(ic) chloride flocculation/biological carbon skeleton co-conditioning by rebuilding and the structure of filter cake skeleton structure sludge disintegration, flco, the dewatering of comprehensive raising mud, the limitation of single method and two kinds of method couplings conditioning mud before breaking, the dewatering breaking mud after born of the same parents/iron(ic) chloride flocculation/biological carbon skeleton co-conditioning through potassium permanganate is obviously better than the efficiency of a kind of Opsonizing method or two kinds of Opsonizing method co-conditionings.Compared with primary sludge, sludge specific resistance decline 98%-99.5%, the clean productive rate of mud improves 22-27 doubly, and moisture content of the cake reaches 62-67%.Working method of the present invention is simple, practical, significant for solution sludge pollution problem.
Embodiment:
Below by specific embodiment, the present invention is set forth further, but do not limit the present invention.
Potassium permanganate used in the present embodiment and iron(ic) chloride are industrial goods, biological carbon used is the sludge organism carbon that the pyrolysis under limited oxygen condition of Changsha second sewage treatment plant residual mud obtains, pyrolysis temperature is 400 DEG C, pyrolysis time is 1h, sludge organism carbon granule size is 200-300 μm, the mud of embodiment 1, embodiment 2 and embodiment 3 conditioning is the excess sludge taking from Changsha second sewage work, and primary sludge water ratio is 98.5-99.7%.
Embodiment 1:
(1) under the agitation condition of 300r/min, in primary sludge, add the potassium permanganate of 18g/kg mud dry weight, stir 1min, carry out mud cell and crack;
(2) under the agitation condition of 300r/min, in the described broken born of the same parents' mud of step (1), continue the iron(ic) chloride adding 138g/kg mud dry weight, stir 1min, promote the growth of mud flco;
(3) under the agitation condition of 30r/min, in step (2) described flocculation sludge, continue the biological carbon adding 55% mud dry weight, stir 4min, biological carbon promotes the water stream channel in sludge filter cake as skeleton;
(4) mud after step (3) described conditioning is carried out filter dehydration.
Acquired results is as follows: primary sludge filters, and sludge specific resistance is 7.70 × 10
13m/kg, the clean productive rate of mud is 1.12kg/ (m
2h); Singly adding the rear sludge specific resistance of potassium permanganate conditioning is 2.33 × 10
13m/kg, the clean productive rate of mud is 2.71kg/ (m
2h); Sludge specific resistance after potassium permanganate and iron(ic) chloride co-conditioning is 2.51 × 10
12m/kg, the clean productive rate of mud is 15.78kg/ (m
2h); 7.45 × 10 are dropped to the sludge specific resistance after potassium permanganate, iron(ic) chloride and biological carbon co-conditioning
11m/kg, the clean productive rate of mud rises to 28.90kg/ (m
2h), filter cake moisture content drops to 64.93% by 92.15% of primary sludge.
Embodiment 2:
(1) under the agitation condition of 350r/min, in primary sludge, add the potassium permanganate of 20g/kg mud dry weight, stir 2min, carry out mud cell and crack;
(2) under the agitation condition of 350r/min, in the described broken born of the same parents' mud of step (1), continue the iron(ic) chloride adding 140g/kg mud dry weight, stir 2min, promote the growth of mud flco;
(3) under the agitation condition of 40r/min, in step (2) described flocculation sludge, continue the biological carbon adding 60% mud dry weight, stir 5min, biological carbon promotes the water stream channel in sludge filter cake as skeleton;
(4) mud after step (3) described conditioning is carried out filter dehydration.
Acquired results is as follows: primary sludge filters, and sludge specific resistance is 5.37 × 10
13m/kg, the clean productive rate of mud is 1.51kg/ (m
2h); Singly adding the rear sludge specific resistance of potassium permanganate conditioning is 1.04 × 10
13m/kg, the clean productive rate of mud is 3.88kg/ (m
2h); Sludge specific resistance after potassium permanganate and iron(ic) chloride co-conditioning is 1.26 × 10
12m/kg, the clean productive rate of mud is 16.51kg/ (m
2h); 5.99 × 10 are dropped to the sludge specific resistance after potassium permanganate, iron(ic) chloride and biological carbon co-conditioning
11m/kg, the clean productive rate of mud rises to 35.01kg/ (m
2h), filter cake moisture content drops to 63.90% by 90.72% of primary sludge.
Embodiment 3:
(1) under the agitation condition of 400r/min, in primary sludge, add the potassium permanganate of 22g/kg mud dry weight, stir 3min, carry out mud cell and crack;
(2) under the agitation condition of 400r/min, in the described broken born of the same parents' mud of step (1), continue the iron(ic) chloride adding 146g/kg mud dry weight, stir 3min, promote the growth of mud flco;
(3) under the agitation condition of 40r/min, in step (2) described flocculation sludge, continue the biological carbon adding 70% mud dry weight, stir 6min, biological carbon promotes the water stream channel in sludge filter cake as skeleton;
(4) mud after step (3) described conditioning is carried out filter dehydration.
Acquired results is as follows: primary sludge filters, and sludge specific resistance is 8.89 × 10
13m/kg, the clean productive rate of mud is 1.06kg/ (m
2h); Singly adding the rear sludge specific resistance of potassium permanganate conditioning is 3.79 × 10
13m/kg, the clean productive rate of mud is 2.17kg/ (m
2h); Sludge specific resistance after potassium permanganate and iron(ic) chloride co-conditioning is 3.03 × 10
12m/kg, the clean productive rate of mud is 13.55kg/ (m
2h); 8.36 × 10 are dropped to the sludge specific resistance after potassium permanganate, iron(ic) chloride and biological carbon co-conditioning
11m/kg, the clean productive rate of mud rises to 26.80kg/ (m
2h), filter cake moisture content drops to 66.47% by 93.23% of primary sludge.
Claims (4)
1. potassium permanganate breaks a method for born of the same parents/iron(ic) chloride flocculation/biological carbon skeleton co-conditioning municipal sludge, it is characterized in that concrete steps are as follows:
(1) under the agitation condition of 200-400r/min, in primary sludge, add the potassium permanganate of 15-25g/kg mud dry weight, stir 1-3min, carry out mud cell and crack;
(2) under the agitation condition of 200-400r/min, in the described broken born of the same parents' mud of step (1), continue the iron(ic) chloride adding 138-150g/kg mud dry weight, stir 1-3min, promote the growth of mud flco;
(3) under the agitation condition of 20-50r/mim, in step (2) described flocculation sludge, continue the biological carbon adding 50%-80% mud dry weight, stir 2-6min, biological carbon promotes the water stream channel in sludge filter cake as skeleton;
(4) mud after step (3) described conditioning is carried out filter dehydration.
2. a kind of potassium permanganate according to claim 1 breaks the method for born of the same parents/iron(ic) chloride flocculation/biological carbon skeleton co-conditioning municipal sludge, it is characterized in that, primary sludge described in step (1) is the excess sludge of sludge from wastewater treatment plant concentration basin, and described in step (1), potassium permanganate is technical grade.
3. a kind of potassium permanganate as claimed in claim 1 breaks the method for born of the same parents/iron(ic) chloride flocculation/biological carbon skeleton co-conditioning municipal sludge, and it is characterized in that, described in step (2), iron(ic) chloride is technical grade.
4. a kind of potassium permanganate as claimed in claim 1 breaks the method for born of the same parents/iron(ic) chloride flocculation/biological carbon skeleton co-conditioning municipal sludge, it is characterized in that, biological carbon described in step (3) is the sludge organism carbon that excess sludge of municipal sewage plant pyrolytic incineration under limited oxygen condition obtains, pyrolysis temperature is 350-450 DEG C, pyrolysis time is 1-2h, and sludge organism carbon granule size is 200-300 μm.
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| CN106242242A (en) * | 2016-09-23 | 2016-12-21 | 北京林业大学 | A kind of manganese salt sludge conditioner and mud dewatering method |
| CN108101334A (en) * | 2018-01-17 | 2018-06-01 | 浙江海云能源科技有限公司 | Sludge carbonization disposal and method of comprehensive utilization |
| CN108358429A (en) * | 2018-03-05 | 2018-08-03 | 北京环球中科水务科技有限公司 | A kind of method of anaerobically digested sludge dehydration |
| CN108358430A (en) * | 2018-03-13 | 2018-08-03 | 南京城建环保水务股份有限公司 | A kind of Treatment of Sludge conditioning medicament and its application method |
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| CN108101334A (en) * | 2018-01-17 | 2018-06-01 | 浙江海云能源科技有限公司 | Sludge carbonization disposal and method of comprehensive utilization |
| CN108358429A (en) * | 2018-03-05 | 2018-08-03 | 北京环球中科水务科技有限公司 | A kind of method of anaerobically digested sludge dehydration |
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| CN109928603B (en) * | 2019-04-23 | 2021-06-29 | 同济大学 | Preparation method and use method of green sludge dewatering agent |
| WO2020215775A1 (en) * | 2019-04-24 | 2020-10-29 | 中国科学院广州能源研究所 | Novel municipal sludge conditioner |
| CN110002709A (en) * | 2019-04-24 | 2019-07-12 | 中国科学院广州能源研究所 | A kind of novel municipal sludge conditioner |
| CN110217956A (en) * | 2019-06-19 | 2019-09-10 | 武汉市城市排水发展有限公司 | For the stabilized combination conditioner of deeply dehydrating sludge collaboration mud cake and application |
| CN110606539A (en) * | 2019-10-16 | 2019-12-24 | 河南省科学院化学研究所有限公司 | Method for treating organic wastewater by utilizing sludge resource |
| CN110606539B (en) * | 2019-10-16 | 2021-10-15 | 河南省科学院化学研究所有限公司 | Method for treating organic wastewater by utilizing sludge resource |
| CN111825304A (en) * | 2020-06-02 | 2020-10-27 | 昆明理工大学 | Method for reducing municipal sludge moisture content by using ultrasonic and self-made dehydrating agent |
| CN112811783A (en) * | 2021-01-14 | 2021-05-18 | 华中科技大学 | Sludge conditioning and dewatering method for activating molecular oxygen by sludge-based iron-rich biochar |
| CN113896385A (en) * | 2021-10-11 | 2022-01-07 | 北京尚水清源水处理技术有限公司 | Sludge dewatering method |
| CN114262143A (en) * | 2021-12-24 | 2022-04-01 | 中国科学院广州能源研究所 | Method for improving dehydration efficiency of antibiotic fungi residues through combined conditioning of microwaves and biochar |
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Application publication date: 20160120 |