CN1274402C - Method for preparing active absorbent and method for intensify water treatment thereby - Google Patents
Method for preparing active absorbent and method for intensify water treatment thereby Download PDFInfo
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- CN1274402C CN1274402C CN 200410044018 CN200410044018A CN1274402C CN 1274402 C CN1274402 C CN 1274402C CN 200410044018 CN200410044018 CN 200410044018 CN 200410044018 A CN200410044018 A CN 200410044018A CN 1274402 C CN1274402 C CN 1274402C
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- water
- sludge
- hypersober
- mud
- particulate
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a method for preparing active absorbent material and a method for intensifying water processing, particularly to a method for preparing active absorbent material by sludge generated from a biochemical sewage processing technique and a method for intensifying water processing by the active absorbent material. The active absorbent is prepared by the processes that solid-liquid separation objects formed after biochemical processing of domestic sewage are used for separating sludge and water through precipitating; the sludge generated from a precipitation tank is dewatered and dried, and the dry sludge is ground into particles which are soaked in acid, and sludge activation is completed under the condition of stirring; the active absorbent is obtained through warming and grinding. The present invention has the water processing intensifying method that raw water enters a mixing tank, a reaction tank, a filter tank and a disinfection tank; a chemical agent is added in the mixing tank; sludge adsorbent is added in the reaction tank. The present invention has the advantages that the soluble rate of sludge adsorbent hydrochloric acid is about 0.25%, the soluble rate of NaOH is about 1.05%, the turbidity removal rate of the filtered effluent water is increased by 10 to 40 %, and the removal rate of organic pollutant is increased by 10 to 40 %.
Description
Technical field:
The present invention relates to a kind of technology of utilizing the mud that produces in the sewage biochemical processing process to prepare the method for active adsorbing material and utilizing this active adsorbing material fortified water to handle.
Background technology:
The present municipal water of China is handled the treatment process that generally adopts: the multistage barrier technological process of coagulation → precipitation → filtration → sterilization, wherein, coagulation and filtration are the key links that ensures water quality.Studies show that, in the filtering technique link, organic increase causes that organic matter can not get effective removal in the coagulation process in the water, reagent consumption is excessive, filtrate in the filter tank is subjected to organic pollution, partly or entirely lost absorption and crown_interception, filtered and greatly weaken as the crucial barrier action in the technology to colloidal impurity; Turbidity, organic matter do not obtain effectively catching in filter process, in follow-up disinfecting process, produced more DBPs.Meeting produces more deposition in clear water reserviors and pipe network, burn into is smelt flavor and reached the secondary pollution problems that is caused by the viral micro-organisms breeding, and these all cause extremely bad influence to human health.Strengthening organic removal method has multiplely, wherein add Powdered Activated Carbon and be a treatment process in reaction tank flexibly and efficient ways, but the price of active carbon is more expensive, and cost of water treatment also will increase substantially thereupon.Can develop the comparatively cheap adsorbent of a kind of efficient price be the task that needs of current water treatment solve.
Summary of the invention:
The method that the purpose of this invention is to provide a kind of preparation method of hypersober and utilize its fortified water to handle, this hypersober not only has the advantage that specific area is big, porosity is big, adsorption capacity is high, the advantage that also have the mechanical strength height, regenerate easily, cost is low.The present invention prepares the Separation of Solid and Liquid thing that forms after hypersober: a, the biochemical treatment of sanitary sewage process to carry out mud-water separation by precipitation like this; B, the mud that obtains in the sedimentation basin is dewatered, under 100～130 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; C, the dewatered sludge particulate is immersed in the acid, contacts 1～48h and finish sludge activation under stirring condition, wherein mud and sour weight ratio are 1: (1～2), described acid are hydrochloric acid or sulfuric acid; D, activated sludge progressively is warming up to 400～1200 ℃ with 1～20 ℃/min speed, under 400～1200 ℃ condition, keeps 30～180min, pulverize into the particulate of 0.001～1mm then, obtain hypersober.The method of utilizing this hypersober fortified water to handle is achieved in that (one) former water enters into mixing pit, in mixing pit, add chemical agent, (2) former water with react through reaction tank after chemical agent mixes, then the precipitation that produces in the reaction tank is carried out mud-water separation by sedimentation basin; (3) the sedimentation basin water outlet is filtered, is sterilized through filter tank, sterilization pool successively, obtain qualified water outlet, the core of this method is to add hypersober in reaction tank, and wherein hypersober is prepared according to following step: a, sanitary sewage carry out mud-water separation through the Separation of Solid and Liquid thing that forms after the biochemical treatment by precipitation; B, the mud that obtains in the sedimentation basin is dewatered, under 100～130 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; C, the dewatered sludge particulate is immersed in the acid, contacts 1～48h and finish sludge activation under stirring condition, wherein mud and sour weight ratio are 1: (1～2), described acid are hydrochloric acid or sulfuric acid; D, activated sludge progressively is warming up to 400～1200 ℃ with 1～20 ℃/min speed, under 400～1200 ℃ condition, keeps 30～180min, pulverize into the particulate of 0.001～1mm then.The tradition biochemical process is handled in the sanitary sewage technology and is contained a large amount of organic matter (more than 60～80%) and a spot of metal salt compound in its mud, organic matter is converted into and has the very mud charcoal of high-specific surface area and flourishing microcellular structure in the high temperature sintering process, a spot of metal salt compound, with molysite and aluminium salt is example, and the compound of iron changes major part and is converted into Fe
2O
3, the compound major part of aluminium is converted into active Al
2O
3, forming the huge surface of adsorption activity number of spots can very high adsorbent, has excellent physical absorption and chemisorption.The surface area of sludge filtration sorbing material of the present invention and micropore area are respectively 40～300m
2/ g and 50～171m
2/ g, grain density is 1.4～2.6g/cm
3About, porosity is about 65%, abrasion of particles rate about 0.30%, the hydrochloric acid soluble rate is about 0.25%, the NaOH soluble rate is about 1.05%, have very good adsorption and remove the organic pollution performance, this invention not only make mud locate be equipped with a new way, and make the resource of mud obtain extraordinary utilization.In the fortified water treatment process, select for use filtering adsorbing material that chemical sludge makes as filtrate, filter back delivery turbidity clearance improves 10%～40%, the organic pollutant removal rate improves 10%～40%, consuming amount of concrete saves 10～30%, haloform antecedent and haloform growing amount reduce significantly, and toxicology detects index and is negative.
The specific embodiment:
The specific embodiment one: present embodiment is to prepare the Separation of Solid and Liquid thing that forms after hypersober: a, the biochemical treatment of sanitary sewage process like this to carry out mud-water separation by precipitation; B, the mud that obtains in the sedimentation basin is dewatered, under 100～130 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; C, the dewatered sludge particulate is immersed in the acid, contacts 1～48h and finish sludge activation under stirring condition, wherein mud and sour weight ratio are 1: (1～2); D, activated sludge progressively is warming up to 400～1200 ℃ with 1～20 ℃/min speed, under 400～1200 ℃ condition, keeps 30～180min, pulverize into the particulate of 0.001～1mm then, obtain hypersober.Described acid is hydrochloric acid or sulfuric acid.
The specific embodiment two: present embodiment is that such fortified water is handled: (one) former water enters into mixing pit, in mixing pit, add chemical agent, (2) former water with react through reaction tank after chemical agent mixes, then the precipitation that produces in the reaction tank is carried out mud-water separation by sedimentation basin; (3) the sedimentation basin water outlet is filtered, is sterilized through filter tank, sterilization pool successively, obtains qualified water outlet, and the core of this method is to add hypersober in reaction tank.The dosage of described chemical agent is 1～100mg/L.Described chemical agent is molysite or aluminium salt, as FeCl
3, Fe
2(SO4)
3, bodied ferric sulfate, AlCl
3, Al
2(SO4)
3, aluminium polychloride etc.The dosage of described hypersober is 1～500mg/L.
The specific embodiment three: what present embodiment and the specific embodiment two were different is also to have added 0～5mg/L oxidant before adding chemical agent.Other technical process are identical with the specific embodiment two.Described oxidant is one or more the mixture in ozone, ferrate, permanganate, chlorine, the chlorine dioxide.
The specific embodiment four: present embodiment is an example with former water body 3 classes, adds 1～100mg/l iron chloride (with Fe in mixing pit
3+Meter), add 1～300mg/L hypersober and handle micro-polluted water in reaction tank, filter back delivery turbidity clearance improves 10%～20%, and the organic pollutant removal rate improves 10%～30%, consuming amount of concrete saves 10～15%, and haloform antecedent and haloform growing amount reduce significantly.
The specific embodiment five: present embodiment is an example with former water body 4 classes, adds 2～4mg/L ferrate earlier in mixing pit, and then adds 1～100mg/lAl
2(SO4)
3(with Al
3+Meter), in reaction tank, add 1～500mg/L hypersober and handle micro-polluted water.Filter back delivery turbidity clearance improves 10%～30%, and the organic pollutant removal rate improves 10%～40%, and consuming amount of concrete saves 10～15%, and haloform antecedent and haloform growing amount reduce significantly.
Claims (5)
1, the preparation method of hypersober is characterized in that it is prepared according to following step: a, sanitary sewage carry out mud-water separation through the Separation of Solid and Liquid thing that forms after the biochemical treatment by precipitation; B, the mud that obtains in the sedimentation basin is dewatered, under 100～130 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; C, the dewatered sludge particulate is immersed in the acid, contacts 1～48h and finish sludge activation under stirring condition, wherein mud and sour weight ratio are 1: (1～2), described acid are hydrochloric acid or sulfuric acid; D, activated sludge progressively is warming up to 400～1200 ℃ with 1～20 ℃/min speed, under 400～1200 ℃ condition, keeps 30～180min, pulverize into the particulate of 0.001～1mm then, obtain mud adsorbent.
2, the method for utilizing the hypersober fortified water to handle, it carries out according to following step: (one) former water enters into mixing pit, in mixing pit, add chemical agent, (2) former water with react through reaction tank after chemical agent mixes, then the precipitation that produces in the reaction tank is carried out mud-water separation by sedimentation basin; (3) the sedimentation basin water outlet is filtered, is sterilized through filter tank, sterilization pool successively, obtain qualified water outlet, it is characterized in that adding in reaction tank hypersober, wherein hypersober is prepared according to following step: a, sanitary sewage carry out mud-water separation through the Separation of Solid and Liquid thing that forms after the biochemical treatment by precipitation; B, the mud that obtains in the sedimentation basin is dewatered, under 100～130 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; C, the dewatered sludge particulate is immersed in the acid, contacts 1～48h and finish sludge activation under stirring condition, wherein mud and sour weight ratio are 1:(1～2), described acid is hydrochloric acid or sulfuric acid; D, activated sludge progressively is warming up to 400～1200 ℃ with 1～20 ℃/min speed, under 400～1200 ℃ condition, keeps 30～180min, pulverize into the particulate of 0.001～1mm then.
3, the method for utilizing the hypersober fortified water to handle according to claim 2, the dosage that it is characterized in that described chemical agent is 1～100mg/L.
4, according to claim 2 or the 3 described methods of utilizing the hypersober fortified water to handle, it is characterized in that described chemical agent is molysite or aluminium salt.
5, the method for utilizing the hypersober fortified water to handle according to claim 2, the dosage that it is characterized in that described hypersober is 1～500mg/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410044018 CN1274402C (en) | 2004-11-08 | 2004-11-08 | Method for preparing active absorbent and method for intensify water treatment thereby |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410044018 CN1274402C (en) | 2004-11-08 | 2004-11-08 | Method for preparing active absorbent and method for intensify water treatment thereby |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1631507A CN1631507A (en) | 2005-06-29 |
| CN1274402C true CN1274402C (en) | 2006-09-13 |
Family
ID=34845948
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|---|---|---|---|
| CN 200410044018 Expired - Fee Related CN1274402C (en) | 2004-11-08 | 2004-11-08 | Method for preparing active absorbent and method for intensify water treatment thereby |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100445223C (en) * | 2005-07-29 | 2008-12-24 | 南京理工大学 | Preparation method of sludge adsorber used for polluted water treatment |
| CN101804319B (en) * | 2010-05-26 | 2011-11-23 | 哈尔滨工业大学 | Method for preparing chemical-biological mixing sludge adsorbent and recycling method thereof for sewage treatment, |
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2004
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