CN1587213A - Method for sludge composting using new regulator - Google Patents
Method for sludge composting using new regulator Download PDFInfo
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- CN1587213A CN1587213A CNA2004100534240A CN200410053424A CN1587213A CN 1587213 A CN1587213 A CN 1587213A CN A2004100534240 A CNA2004100534240 A CN A2004100534240A CN 200410053424 A CN200410053424 A CN 200410053424A CN 1587213 A CN1587213 A CN 1587213A
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- mud
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Treatment Of Sludge (AREA)
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Abstract
The present invention relates to new technological process of aerobically composting sludge with suspended biological carrier normally used in sewage treatment as the amendment. The sludge material is added with wood dust in 5-15 wt% of sludge and suspending biological carrier stuffing in 5-10 wt% of sludge as the amendment to make the stirred material possess water content of 60-70 %. The aerobic fermentation apparatus is dynamically controlled I ventilation and stirring frequency for fast composing treatment. Finally, the suspending biological carrier stuffing is sieved out for reuse. The new amendment of the present invention has good attaching performance, no loss and reuse, and the present invention has high composing efficiency.
Description
Technical field
The present invention relates to a kind of novel process of sludge aerobic compost processing.Be specifically related to floated bio-carrier is applied to method in the sludge aerobic compost metallization processes as novel amendment.
Background technology
Along with the quickening of Urbanization in China, the mud that municipal wastewater treatment plant produces also will increase considerably.According to statistics, at present the annual dewatered sludge amount that produces of China is about 6,670,000 tons, and only the Shanghai City mud that produces water ratio 99% every day just has more than 50,000 ton.At present, disposing municipal sludge has methods such as burning, sanitary landfill and soil utilization, and wherein the soil utilization has become an important disposal approach.But must carry out stabilization and harmless treatment before the soil utilization.Sludge stabilization and harmless treatment mainly contain: aerobic sigestion, anaerobic digestion, composting, double digestion, heat drying and alkaline stabilisation etc.Wherein, composting (aerobic compost processing) is the most frequently used.Composting is exactly in fact to utilize aerobic microbiological (as bacillus, coccus and actinomycetes etc.) in the mud to carry out the process of aerobic fermentation, with mud and amendment (as stalk, wood chip, leaf, Pericarppium arachidis hypogaeae, corn cob etc.) under conditions such as pH, C/N, ventilation, moisture, temperature, by mixing microorganisms colony organism is carried out oxygenolysis, make organism be converted into the class soil ulmin, its product also is biosolids (Biosolids).Mud is after composting, pathogenic bacteria, parasitic ovum, weed seed etc. almost all are killed, moisture percentage in sewage sludge and volatile component reduce, stink is eliminated, the ratio of heavy metal exchangeable species also can reduce, available nutrient increases to some extent, and the product behind the sludge composting becomes the product of the clean and stable in properties of a kind of comparison.But amendments such as traditional wood chip, stalk, rice husk because of decomposition takes place for self, lose water-retaining capacity in composting process, can not play a supporting role, and can only disposablely utilize, and can not recycle.And increasing along with mud handling capacity, the source of wood chip class amendment has become a great problem.
Summary of the invention
The objective of the invention is to seek a kind of novel amendment that can be recycled, further purpose is to provide and uses this novel amendment to carry out the technology of municipal sewage sludge aerobic compostization.
To achieve these goals, the present invention is performed such: at first (patent No. ZL 97 2 23855.7 with commodity commonly used in a kind of water treatment floated bio-carrier by name, ZL 98 2 23959.9, ZL 98 225557.8, sell in Shanghai with credit environmental protection development in science and technology company limited) as novel amendment.This floating stuffing is established the spheroid or the right cylinder of through hole in being, diameter has bigger specific surface area (144-285m between 2-4cm
2/ m
3).It is a kind of technology of biological membrane in water technology, its essence is that microorganism is grown on the floating stuffing with membranaceous.It can increase biomass in the pond, reduces load, improves treatment effect and has good removal ammonia nitrogen effect.Because moisture percentage in sewage sludge higher (general dewatered sludge is 75～80%), air permeability is relatively poor, therefore before compost, needs to add a certain amount of amendment.This filler can be given full play to its high-specific surface area and play support as microbe carrier with in mud, guarantees that aerobic compost can finish quickly and efficiently.
Then, according to dewatered sludge initial aqueous rate, be controlled to be according to determining mud, novel amendment mass ratio (relevant) with the windrow water ratio with the water ratio of wood chip and mud with wood chip class amendment, first fermentation reaction will add commercially available VT bacterium (Beijing Voto Sky ﹠ Land Biotech Co., Ltd.) and induce microbial inoculum (all realizing the recycle of advantage organism of fermentation flora later on by feed back) as what produce the superior microorganism population, makes initial material water ratio after the stirring 60%～70%.Control the ventilation and the stirring frequency of dynamic aerobic fermentation device simultaneously, carry out aerobic high-rate composting and handle.The concrete steps that this floated bio-carrier is used for the sludge aerobic compost treatment process are as follows:
The first step: determine that earlier novel amendment is floated bio-carrier, then mud is carried out sampling analysis, determine to add two kinds of amendments and backflow material's proportion then: to water ratio is 75-80%, (DM represents dry-matter to total organic matter 400-600g/kgDM, down together), water-soluble total nitrogen 3.0-5.0g/kgDM, coliform value 〉=24, the mud of 000MPN/100gDM, adding two kinds of amendments is respectively: water ratio is that the wood chip of 10-20% is the 5-15% of mud weight, floated bio-carrier is the 5-10% of mud weight, makes compound initial aqueous rate reach 60-70% and is as the criterion.0.1 ‰ the VT bacterium that needs weighing mud weight during first fermentation is as inducing microbial inoculum, and stand-by with 10 times of tap water dilutions.Fa Jiao control of reflux ratio is between 10-40% once more.
Second step: mud and above-mentioned load weighted in proportion wood chip, floated bio-carrier are put into dynamic aerobic fermentation chamber, and two-way then stirring, first fermentation then will above-mentionedly be converted water and be diluted the VT bacterium that gets well and evenly be sprayed on the material; The backflow material of later on can be directly and keeping in the storehouse carries out thorough mixing, and adjust the ventilation system air quantity and be controlled at 100-300L/min, the directed stirring, setting corresponding stirring frequency automatically be every stirring in 5-10 hour 5-20 minute, carries out fermentative processing.
The 3rd step: when more than the fermentation calefaction to 55 ℃, continue to finish in 5-13 days by the stirring frequency and the ventilation operation of above-mentioned setting, the whole compost cycle is 7-14 days, can keep more than 55 ℃ 4～5 days, when compost is finished after testing the coliform value in the mud be reduced to below the 30MPN/100gDM, roundworm egg 100% deactivation, NH in the storehouse
3Concentration is lower than 1.0mg/m
3, mud granule is even, meets the related request that the soil utilizes.
The 4th step: sieve, floated bio-carrier is separated from the mud of harmless treatment, in the batching of the first step, recycle once more as novel amendment.
The present invention has following advantage:
1. because the novel amendment that the present invention finds is the polypropylene material, be porous ball-type or cylindrical, specific surface area is big, biological attachment ability than wood chip class amendment is stronger, the amendment weightening finish was 4.6 times when the compost end was found in experiment, therefore used this novel amendment to carry out compost, the material loosening that the reaction end obtains, amendment is easy to separate with material, and the superior microorganism that adheres in its surface micropore again can be with it as the feed back utilization.
Since in the use novel amendment lossless substantially, repeated use capable of circulation, the wastage rate of each compost are lower than 3%.And low price, more than extra large geographic price be example, only be equivalent to about 2/3 of 500 yuan/ton of wood chip/wood chips.Therefore running cost of the present invention is cheap, and economic benefit is fairly obvious.
3. because novel amendment of the present invention has good supporting role, the micropore of self can make the interior ventilation of heap body more unobstructed again, experimental results show that, use this amendment can make the wood chip amount reduce more than 50%, therefore can save the gas blower air-supply time greatly, be 12kWh thereby make current consumption in the composting process be reduced to the current consumption of handling mud per ton.
4. because the present invention has added novel amendment, compare with traditional amendment technologies such as only adopting wood chip/wood chip, compost early warming speed is fast, and dehydration of heap body and cooling were rapider when compost finished.Therefore, compost maturity required time maximum can shorten to 7 days, and therefore the compost cycle shortening 1/2～3/4 than domestic and international similar industrialization composting technology can improve composting efficiency greatly, also is more suitable for the automatic control in composting process simultaneously.
5. the utilising efficiency that helps composting production minimizing and raising conversion unit.From our experiment situation, add the novel amendment of 5%-10%, can the wood chip decrement is over half, so wood chip content reduces greatly in the composting production, be consistent with the principle of sludge treatment minimizing, for good condition has been created in the soil utilization of follow-up mud.In addition,, reduce the wood chip ratio, improve novel amendment consumption, also help the utilising efficiency that improves the compost conversion unit because of the more novel amendment of wood chip density is little.
Embodiment
Embodiment 1
At first the dewatered sludge to Shanghai municipal wastewater treatment plant (sanitary sewage and and a small amount of food wastewater) carries out sampling analysis, the essential property of mud is: water ratio 80%, total organic matter 550g/kgDM, water-soluble total nitrogen 3.0g/kgDM, coliform value 〉=24,000MPN/100gDM.The wood chip and the specification of adding water ratio about 10%～20% then are ZG25, external diameter Φ 25mm, and two kinds of amendments of the floated bio-carrier of spheric polypropylene are as auxiliary material, and addition is respectively 15% and 5% of mud weight.Above-mentioned material is put into by ventilation system and the close-fitting dynamic aerobic fermentation chamber of automatic blending system.The weight of control backflow material is 40% of mud weight.Two-way then stirring makes fermentation dominant microflora uniform mixing in the material system.Open pneumatic pump, ventilation is controlled at 100-300L/min, the directed stirring 5-10 minute every 5-10 hour, and through processing back discharging in 7 days, weight of material reduced 43.0%.Detect coliform value≤30MPN/100gDM in the mud, roundworm egg 100% deactivation, NH in the fermentation cabin
3Concentration is lower than 1.0mg/m
3, germination index＞60%, material particles is even, meets the related request that the soil utilizes.Sieve at last, floated bio-carrier separated from the mud of harmless treatment, once more in batching as the amendment recycle.
Embodiment 2
Dewatered sludge to Shanghai municipal wastewater treatment plant (sanitary sewage and trade effluent account for 80% and 20% respectively) carries out sampling analysis, the essential property of mud is: water ratio 78%, total organic matter 600g/kgDM, water-soluble total nitrogen 3.5g/kgDM, coliform value 〉=24,000MPN/100gDM.Add the wood chip of water ratio about 10%～20% and as the spheric polypropylene filler of embodiment 1 as auxiliary material, addition is respectively 5% and 10% of mud weight, and above-mentioned material is put into by ventilation system with the close-fitting dynamic aerobic fermentation chamber of automatic blending system.The weight of control backflow material is 40% of mud weight.Two-way then stirring makes fermentation dominant microflora uniform mixing in the material system.Open pneumatic pump, ventilation is controlled at 100-300L/min, the directed stirring 10-20 minute every 5-10 hour.Through processing back discharging in 14 days, weight of material reduced 51.0%.Detect coliform value≤30MPN/100gDM in the mud, roundworm egg 100% deactivation, NH in the fermentation cabin
3Concentration is lower than 1.0mg/m
3, germination index＞50%, material particles is even, meets the related request that the soil utilizes.Sieve, floated bio-carrier is separated from the mud of harmless treatment, be used in again in the batching of the first step as novel amendment.
Embodiment 3
Dewatered sludge to Shanghai municipal wastewater treatment plant (sanitary sewage and and a small amount of food wastewater) carries out sampling analysis, the essential property of mud is: water ratio 80%, total organic matter 550g/kgDM, water-soluble total nitrogen 3.0g/kgDM, coliform value 〉=24,000MPN/100gDM.Add the wood chip of water ratio about 10%～20% then and as the polypropylene cylindrical pad of embodiment 1 as auxiliary material, addition is respectively 10% and 10% of mud weight.Above-mentioned material is put into by ventilation system and the close-fitting dynamic aerobic fermentation chamber of automatic blending system.The weight of control backflow material is 10% of mud weight.Two-way then stirring makes fermentation dominant microflora uniform mixing in the material system.Open pneumatic pump, ventilation is controlled at 100-300L/min, the directed stirring 5-10 minute every 5-10 hour, and through processing back discharging in 14 days, weight of material reduced 42.3%.Detect coliform value≤30MPN/100gDM in the mud, roundworm egg 100% deactivation, NH in the fermentation cabin
3Concentration is lower than 1.0mg/m
3, germination index＞60%, material particles is even, meets the related request that the soil utilizes.Sieve, floated bio-carrier is separated from the mud of harmless treatment, be used in again in the batching of the first step as novel amendment.
Claims (1)
1. one kind is carried out the method for sludge compostingization with novel amendment, it is characterized in that:
The first step: determine that earlier novel amendment is floated bio-carrier, then mud is carried out sampling analysis, determine to add two kinds of amendments and backflow material's proportion then: to water ratio is 75-80%, total organic matter 400-600g/kgDM, water-soluble total nitrogen 3.0-5.0g/kgDM, coliform value 〉=24, the mud of 000MPN/100gDM, adding two kinds of amendments is respectively: water ratio is that the wood chip of 10-20% is the 5-15% of mud weight, floated bio-carrier is the 5-10% of mud weight, making compound initial aqueous rate reach 60-70% is as the criterion, 0.1 ‰ of need weighing mud weight VT bacterium is as inducing microbial inoculum during first the fermentation, and stand-by with 10 times of tap water dilutions, Fa Jiao control of reflux ratio is between 10-40% once more;
Second step: mud and above-mentioned load weighted in proportion wood chip, floated bio-carrier are put into dynamic aerobic fermentation chamber, and two-way then stirring, first fermentation then will above-mentionedly be converted water and be diluted the VT bacterium that gets well and evenly be sprayed on the material; The backflow material of later on can be directly and keeping in the storehouse carries out thorough mixing, and adjust the ventilation system air quantity and be controlled at 100-300L/min, the directed stirring, setting corresponding stirring frequency automatically be every stirring in 5-10 hour 5-20 minute, carries out fermentative processing;
The 3rd step: when more than the fermentation calefaction to 55 ℃, continue to finish in 5-13 days by the stirring frequency and the ventilation operation of above-mentioned setting, the whole compost cycle is 7-14 days, can keep more than 55 ℃ 4～5 days, when compost is finished after testing the coliform value in the mud be reduced to below the 30MPN/100gDM, roundworm egg 100% deactivation, NH in the storehouse
3Concentration is lower than 1.0mg/m
3, mud granule is even, meets the related request that the soil utilizes;
The 4th step: sieve, floated bio-carrier is separated from the mud of harmless treatment, in the batching of the first step, use once more as novel amendment circulation profit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100534240A CN100434401C (en) | 2004-08-04 | 2004-08-04 | Method for sludge composting using new regulator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100534240A CN100434401C (en) | 2004-08-04 | 2004-08-04 | Method for sludge composting using new regulator |
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| Publication Number | Publication Date |
|---|---|
| CN1587213A true CN1587213A (en) | 2005-03-02 |
| CN100434401C CN100434401C (en) | 2008-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100534240A Expired - Fee Related CN100434401C (en) | 2004-08-04 | 2004-08-04 | Method for sludge composting using new regulator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101774836A (en) * | 2010-01-22 | 2010-07-14 | 江苏江达生态科技有限公司 | Method for mixed composting of dredging silt and life sludge by composite microorganism |
| CN101781131A (en) * | 2010-02-11 | 2010-07-21 | 厦门水务集团有限公司 | Sludge composting method |
| CN101913920A (en) * | 2010-08-09 | 2010-12-15 | 娄底市裕德科技有限公司 | Composite conditioner for preparing sludge compost and application thereof |
| CN101372427B (en) * | 2008-09-28 | 2012-01-11 | 李伟光 | Solid waste high temperature aerobic composting method using stereoscopic ventilating apparatus |
| CN102515904A (en) * | 2011-12-23 | 2012-06-27 | 河南工业大学 | Cyclically degradable granulated conditioning agent and application of conditioning agent in sludge compost |
| CN108083862A (en) * | 2017-12-25 | 2018-05-29 | 河南师范大学 | A kind of compost method using recoverable version compost conditioner |
| CN110040924A (en) * | 2019-03-14 | 2019-07-23 | 杭州电子科技大学 | Sludge reduction method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100348637B1 (en) * | 1999-07-21 | 2002-08-13 | 김재인 | Witout Discharging Treatment System and Paddy Rice Fertilizer by The Composting Method of Livestock Sewage. |
| CN1149183C (en) * | 2000-05-15 | 2004-05-12 | 黄焕忠 | Biological Compost treating method |
| CN1397519A (en) * | 2002-08-16 | 2003-02-19 | 福建省尤溪县绿地生物制品有限公司 | Process for preparing organic fertilizer from sewage and sludge |
-
2004
- 2004-08-04 CN CNB2004100534240A patent/CN100434401C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101372427B (en) * | 2008-09-28 | 2012-01-11 | 李伟光 | Solid waste high temperature aerobic composting method using stereoscopic ventilating apparatus |
| CN101774836A (en) * | 2010-01-22 | 2010-07-14 | 江苏江达生态科技有限公司 | Method for mixed composting of dredging silt and life sludge by composite microorganism |
| CN101781131A (en) * | 2010-02-11 | 2010-07-21 | 厦门水务集团有限公司 | Sludge composting method |
| CN101913920A (en) * | 2010-08-09 | 2010-12-15 | 娄底市裕德科技有限公司 | Composite conditioner for preparing sludge compost and application thereof |
| CN102515904A (en) * | 2011-12-23 | 2012-06-27 | 河南工业大学 | Cyclically degradable granulated conditioning agent and application of conditioning agent in sludge compost |
| CN102515904B (en) * | 2011-12-23 | 2014-10-22 | 河南工业大学 | Cyclically degradable granulated conditioning agent and application of conditioning agent in sludge compost |
| CN108083862A (en) * | 2017-12-25 | 2018-05-29 | 河南师范大学 | A kind of compost method using recoverable version compost conditioner |
| CN110040924A (en) * | 2019-03-14 | 2019-07-23 | 杭州电子科技大学 | Sludge reduction method |
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| CN100434401C (en) | 2008-11-19 |
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Granted publication date: 20081119 Termination date: 20110804 |