CN1242927C - Preparation method of sludge adsorbent and method for intensified processing domestic sewage using the same - Google Patents
Preparation method of sludge adsorbent and method for intensified processing domestic sewage using the same Download PDFInfo
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- CN1242927C CN1242927C CN 200410043980 CN200410043980A CN1242927C CN 1242927 C CN1242927 C CN 1242927C CN 200410043980 CN200410043980 CN 200410043980 CN 200410043980 A CN200410043980 A CN 200410043980A CN 1242927 C CN1242927 C CN 1242927C
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Abstract
The present invention relates to a preparation method of sludge adsorbent and a method for intensively processing domestic sewage, particularly to a preparation method of sludge adsorbent and a method for processing domestic sewage by the sludge adsorbent. The sludge adsorbent has the production processes that (a), the domestic sewage enters a mixing tank, and a chemical agent is added in the mixing tank; (b), the sewage passes a reaction tank, and sludge-water separation is carried out on sedimentation substances through a sedimentation tank; (c), the sludge is dewatered, dried and ground into particles; (d), the dry sludge particles are activated and are ground into particles, and the sludge adsorbent is obtained. The domestic sewage processing method using the sludge adsorbent is characterized in that the domestic sewage enters the mixing tank, the reaction tank and the sedimentation tank, and the sludge-water separation is carried out; the chemical agent is added in the mixing tank, and the sludge adsorbent is added in the mixing tank or the reaction tank. The present invention has the advantages that the adsorption capacity of COD and the adsorption capacity of TP are respectively more than 242.80 mg/g and 5.46 mg/g, and the medicine consumption is saved by more than 50 %.
Description
Technical field:
The present invention relates to a kind of preparation method of mud adsorbent and with the treatment process of this mud adsorbent sanitary sewage.
Background technology:
It is extensive that the sewage chemical enhanced primary is handled (CEPT) process applications, is particularly suitable for the city of developing country's fast development, and foreign study is thought can become the alternative techniques of traditional biological treatment process.The key issue of CEPT technology is the disposal of pharmaceutical chemicals expense and mud, and wherein the chemical method sludge output is 1.5～2.0 times of traditional one-level treatment process output.Therefore, strengthening chemical one-level treatment process key issue is to reduce consumption of chemical agent, and reduces the quantity discharged and the recycling sludge of mud.Sludge disposal and processing costs are the major portions of sewage work's working cost, account for closely 30～50%, are the problems that need conscientiously solve about sludge disposal and resource utilization at present, and recycling sludge is imperative.Organic content is up to 60%～80% in the sludge of sewage treatment plant, and utilizing mud is feasible for the cheap gac that the preparation of charcoal source has certain mass.
Summary of the invention:
The preparation method and the method for utilizing its intensive treatment sanitary sewage that the purpose of this invention is to provide a kind of mud adsorbent, this method by chemically precipitated sludge in the chemical enhanced domestic sewage treatment process is made sorbent material improve its in the sanitary sewage intensive treatment to organic removal efficient, reduce the usage quantity of chemical agent in the chemical enhanced treatment process and reduce the quantity discharged of mud.Mud adsorbent of the present invention is preparation like this: a, sanitary sewage enter into mixing pit, add 2～100mg/L (in pure metal salt in the chemical agent) chemical agent in mixing pit; B, sewage and react through reaction tank after chemical agent mixes carry out mud-water separation with the precipitation that produces in the reaction tank by settling tank then; C, the mud that obtains in the settling tank is dewatered, under 100～110 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; D, the dewatered sludge particulate is immersed in the sulfuric acid, contacts 1～48h and finish sludge activation under agitation condition, wherein mud and sulfuric acid weight ratio are 1: (1～2); E, activated sludge is kept 30～180min under 200～700 ℃ condition, pulverize into the particulate of 0.001～2mm then, obtain mud adsorbent.Utilize this mud adsorbent chemical treatment sanitary sewage to be achieved in that (one) sanitary sewage enters into mixing pit, to wherein adding chemical agent; (2) sewage with react through reaction tank after chemical agent mixes; (3) sedimentable matter is carried out mud-water separation by settling tank, in mixing pit or reaction tank, add mud adsorbent in (two) process, described mud adsorbent is to obtain like this: a, sanitary sewage enter into mixing pit, add 2～1OOmg/L (in pure metal salt in the chemical agent) chemical agent in mixing pit; B, sewage and react through reaction tank after chemical agent mixes carry out mud-water separation with the precipitation that produces in the reaction tank by settling tank then; C, the mud that obtains in the settling tank is dewatered, under 100～110 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; D, the dewatered sludge particulate is immersed in the sulfuric acid, contacts 1～48h and finish sludge activation under agitation condition, wherein mud and sulfuric acid weight ratio are 1: (1～2); E, activated sludge is kept 30～180min under 200～700 ℃ condition, pulverize into the particulate of 0.001～2mm then, obtain mud adsorbent.The mud of (three) process gained can reuse in the sewage disposal of the present invention, handles once more to obtain mud adsorbent.Contain a large amount of organism and metal hydroxides in the CEPT mud, organism is converted into and has the very mud charcoal of high-specific surface area and flourishing microvoid structure in chemical activation and high temperature sintering process, metal salt compound (is example with the molysite), the oxyhydroxide of iron is converted into Fe
2O
3, form the complex body sorbent material that iron charcoal adsorption activity number of spots is huge, surface energy is very high, have physical adsorption and chemisorption, its effect is better than sorbent material that common aerating activated sludge makes to organic matter removal effect in the sewage.Mud adsorbent BET surface-area and micropore area reach 200～300m respectively
2/ g and 171m
2/ g, near 100%, the clearance of colourity, COD and SS reaches 87%, 78% and 99% in the textile waste to the clearance of Viola crystallina.Technology (CEPT) mud adsorbent that chemical enhanced one-level is handled sanitary sewage to the adsorptive power of COD, TP be respectively 242.80mg/g, more than the 5.46mg/g.The consumption that the adding of CEPT mud adsorbent makes chemical agent is when identical with independent use chemical agent treatment effect, and the medicament usage quantity has been saved more than 50%.
Embodiment:
Embodiment one: the mud adsorbent of present embodiment is preparation like this: a, sanitary sewage enter into mixing pit, add 2～100mg/L (in pure metal salt in the chemical agent) chemical agent in mixing pit; B, sewage and react through reaction tank after chemical agent mixes carry out mud-water separation with the precipitation that produces in the reaction tank by settling tank then; C, the mud that obtains in the settling tank is dewatered, under 100～110 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; D, the dewatered sludge particulate is immersed in the sulfuric acid, contacts 1～48h and finish sludge activation under agitation condition, wherein mud and sulfuric acid weight ratio are 1: (1～2); E, activated sludge is kept 30～180min under 200～700 ℃ condition, pulverize into the particulate of 0.001～2mm then, obtain mud adsorbent.Described chemical agent is molysite or aluminium salt.
Embodiment two: present embodiment is like this sanitary sewage to be carried out chemical enhanced processing: (one) sanitary sewage enters into mixing pit, to wherein adding chemical agent; (2) sewage with react through reaction tank after chemical agent mixes; (3) sedimentable matter is carried out mud-water separation by settling tank, in mixing pit or reaction tank, add mud adsorbent in (two) process, described mud adsorbent is to obtain like this: a, sanitary sewage enter into mixing pit, add 2～100mg/L (in pure metal salt in the chemical agent) chemical agent in mixing pit; B, sewage and react through reaction tank after chemical agent mixes carry out mud-water separation with the precipitation that produces in the reaction tank by settling tank then; C, the mud that obtains in the settling tank is dewatered, under 100～110 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; D, the dewatered sludge particulate is immersed in the sulfuric acid, contacts 1～48h and finish sludge activation under agitation condition, wherein mud and sulfuric acid weight ratio are 1: (1～2); E, activated sludge is kept 30～180min under 200～700 ℃ condition, pulverize into the particulate of 0.001～2mm then, obtain mud adsorbent.The position that adds of described mud adsorbent is optional position in mixing pit or the reaction tank; The time of adding of described mud adsorbent is that chemical agent added the back 0～600 second.Described chemical agent is molysite or aluminium salt, and described molysite is an iron(ic) chloride.The dosage of described mud adsorbent is 0.01～10g/L (with a solid weight meter).The dosage of chemical agent is 2～40mg/L in described (one) process.Present embodiment can be united use with follow-up biological treatment or middle water technology.
Embodiment three: present embodiment be like this to sanitary sewage carry out chemical enhanced processing: a, sanitary sewage enters into mixing pit, adds 10mg/L iron(ic) chloride (in iron) in mixing pit; B, sewage and react through reaction tank after chemical agent mixes carry out mud-water separation with the precipitation that produces in the reaction tank by settling tank then; C, the mud that obtains in the settling tank is dewatered, under 105 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; D, the dewatered sludge particulate is immersed in the sulfuric acid, contact 1h finishes sludge activation under agitation condition, and wherein mud and sulfuric acid weight ratio are 1: 1.5; E, activation 30min pulverize into the particulate of 0.001～1mm then, obtain mud adsorbent; F, mud adsorbent is made into suspension liquid, adjusts the pH value and be 4.0～8.0, standby; G, sanitary sewage enter into mixing pit, add 10mg/L iron(ic) chloride (in iron) in mixing pit, add 0.6g/L (with solid weight meter) mud adsorbent simultaneously in reaction tank, and chemical precipitation is carried out mud-water separation by settling tank.The reinforcement clearance of turbidity, UV254, COD and TP is respectively 83.33%, 52.300%, 48.84% and 88.96% in the present embodiment, and the adsorptive power of corresponding COD and TP reaches 242.80mg/g and 5.46mg/g respectively.
Embodiment four: present embodiment be like this to sanitary sewage carry out chemical enhanced processing: a, sanitary sewage enters into mixing pit, adds 10mg/L iron(ic) chloride (in iron) in mixing pit; B, sewage and react through reaction tank after chemical agent mixes carry out mud-water separation with the precipitation that produces in the reaction tank by settling tank then; C, the mud that obtains in the settling tank is dewatered, under 105 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; D, the dewatered sludge particulate is immersed in the sulfuric acid, contact 2h finishes sludge activation under agitation condition, and wherein mud and sulfuric acid weight ratio are 1: 1.5; E, activation 30min pulverize into the particulate of 0.001～1mm then, obtain mud adsorbent; F, mud adsorbent is made into suspension liquid, adjusts the pH value and be 4.0～7.O, standby; G, add 10mg/L iron(ic) chloride, add at iron(ic) chloride then and in reaction tank, added 0.6g/L (with solid weight meter) mud adsorbent in back 135 seconds, chemical precipitation is carried out mud-water separation by settling tank in the ingress of reaction tank.Present embodiment is respectively 94.55%, 66.28%, 46.11% and 89.59% to the reinforcement clearance of turbidity, UV254, COD and TP.When adding iron(ic) chloride 10mg/L separately, the COD clearance is 36.83%, adds CEPT mud adsorbent 0.6g/L and chemical agent iron(ic) chloride 10mg/L in sewage, and the COD clearance brings up to 46.11%, the relative raising 25.2% of COD clearance from 36.83%.
Claims (7)
1, the preparation method of mud adsorbent, it is characterized in that described mud adsorbent is preparation like this: a, sanitary sewage enter into mixing pit, add 2～100mg/L chemical agent in mixing pit; B, sewage and react through reaction tank after chemical agent mixes carry out mud-water separation with the precipitation that produces in the reaction tank by settling tank then; C, the mud that obtains in the settling tank is dewatered, under 100～110 ℃, dry, dewatered sludge is ground into the particulate of 0.001～1mm to constant weight; D, the dewatered sludge particulate is immersed in the sulfuric acid, contacts 1～48h and finish sludge activation under agitation condition, wherein mud and sulfuric acid weight ratio are 1: 1～2; E, activated sludge is kept 30～180min under 200～700 ℃ condition, pulverize into the particulate of 0.001～2mm then, obtain mud adsorbent.
2, the preparation method of mud adsorbent according to claim 1 is characterized in that described chemical agent is molysite or aluminium salt.
3, utilize the method for the mud adsorbent intensive treatment sanitary sewage of the described preparation method's acquisition of claim 1, the method of described intensive treatment sanitary sewage is handled according to following step:, sanitary sewage enters into mixing pit, to wherein adding chemical agent; Two, sewage with react through reaction tank after chemical agent mixes; Three, sedimentable matter is carried out mud-water separation by settling tank, it is characterized in that in mixing pit or reaction tank, adding mud adsorbent in second process.
4, the method for utilizing mud adsorbent intensive treatment sanitary sewage according to claim 3, the dosage that it is characterized in that chemical agent in described first process is 2～40mg/L.
5, the method for utilizing mud adsorbent intensive treatment sanitary sewage according to claim 3, the time of adding that it is characterized in that described mud adsorbent is that chemical agent added the back 0～600 second.
6,, it is characterized in that described chemical agent is molysite or aluminium salt according to claim 3, the 4 or 5 described methods of utilizing mud adsorbent intensive treatment sanitary sewage.
7, the method for utilizing mud adsorbent intensive treatment sanitary sewage according to claim 3, the dosage that it is characterized in that described mud adsorbent is 0.01～10g/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410043980 CN1242927C (en) | 2004-10-26 | 2004-10-26 | Preparation method of sludge adsorbent and method for intensified processing domestic sewage using the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410043980 CN1242927C (en) | 2004-10-26 | 2004-10-26 | Preparation method of sludge adsorbent and method for intensified processing domestic sewage using the same |
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| Publication Number | Publication Date |
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| CN1603244A CN1603244A (en) | 2005-04-06 |
| CN1242927C true CN1242927C (en) | 2006-02-22 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100348309C (en) * | 2005-07-29 | 2007-11-14 | 南京理工大学 | Method for preparing mud adsorbent used for desulfurization of flue-gas |
| CN101537342B (en) * | 2009-03-23 | 2010-12-01 | 浙江大学 | Chemical modification method for preparing residual activated sludge to absorbent |
| 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, |
| CN102381774A (en) * | 2010-08-30 | 2012-03-21 | 东莞市上水环保科技有限公司 | Method for treating urban sewage |
| WO2013063763A1 (en) * | 2011-11-01 | 2013-05-10 | 华南再生资源（中山）有限公司 | Method for using sludge to manufacture microporous adsorbent, product, and special equipment |
| CN102432144B (en) * | 2011-11-01 | 2013-04-17 | 华南再生资源（中山）有限公司 | Method for preparing microporous adsorbent from sludge, product and special equipment |
| CN102553515B (en) * | 2012-01-19 | 2014-04-02 | 苏州科技学院 | Method for preparing dephosphorus adsorbent by using water purification sludge as raw material |
| CN106186530B (en) * | 2016-08-04 | 2019-04-23 | 云南腾旭市政工程设计有限公司 | A kind of high-efficient treatment method of sanitary sewage |
| CN113213564A (en) * | 2021-05-17 | 2021-08-06 | 深圳市金海威景观设计工程有限公司 | Method for preparing water treatment medicament by using sludge residues |
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