CN1266832A - Process for preparing compound organic fertilizer from municipal sludge - Google Patents

Process for preparing compound organic fertilizer from municipal sludge Download PDF

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Publication number
CN1266832A
CN1266832A CN00113760A CN00113760A CN1266832A CN 1266832 A CN1266832 A CN 1266832A CN 00113760 A CN00113760 A CN 00113760A CN 00113760 A CN00113760 A CN 00113760A CN 1266832 A CN1266832 A CN 1266832A
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China
Prior art keywords
zeolite
mud
sludge
fertilizer
organic composite
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CN00113760A
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Chinese (zh)
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CN1137870C (en
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张增强
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Northwest A&F University
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Northwest A&F University
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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05D—INORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C; FERTILISERS PRODUCING CARBON DIOXIDE
    • C05D9/00—Other inorganic fertilisers
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/10—Solid or semi-solid fertilisers, e.g. powders
    • C05G5/12—Granules or flakes
    • 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
    • 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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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Fertilizers (AREA)

Abstract

A process for preparing compound organic fertilizer from municipal sludge includes mixing the zeolite as swelling amendment with said sludge, aerobic fermentation, adding inorganic fertilizer to screened sludge heap, proportioning and granulating. It features that said zeolite does not take part in microbe degradation, so it can be reused. its advantages are low cost and reducing the affect of sludge on environment.

Description

The method of preparing compound organic fertilizer from municipal sludge
The present invention relates to the preparation method of organic composite fertilizer, particularly a kind of novel method of utilizing preparing compound organic fertilizer from municipal sludge.
Along with China's Increase of population and expanding economy, the municipal sewage treatment cause develops rapidly, and the mud of leaving over after the sewage disposal how better to dispose be the weak link that the restriction sewage treatment industry develops in a healthy way always.Owing to reasons such as economy and technical limitation, the disposal of mud can not get basic solution always, municipal sludge has been manipulated so the heavy burden of sewage work, so that some sewage works can't run well, produced simultaneously mud is stacked arbitrarily and discharging, environment around the plant area is caused secondary pollution again, make the sewage work that builds up to bring into play it and thoroughly eliminate less environmental contamination.
Contain a large amount of and micronutrient element of a large amount of organic matters and necessary for plant growth in the mud, the soil utilization of municipal sludge is a kind of effect method of disposal preferably, has certain economic benefits and environmental benefit.But the direct as fertilizer sources of mud is used, and its fertilizer efficiency is very limited after all, is difficult to its real market, owing to contain pollution substances such as pathogenic bacteria, parasite (ovum) and heavy metal in the mud, using in a large number to increase the risk that goes up earth, water body and topsoil simultaneously.At present, to the method for disposal of mud have that sanitary landfill, sea jettison, burning and soil utilization etc.Landfill may give an offensive smell, also possible polluted underground water source, and many countries can reduce day by day for the place of landfill.The sea jettisons can endanger Marine ecosystems, threatens human food chain.Burn the waste bioenergy, atmosphere pollution, and also investment and process cost and pre-treatment expense are all very big.The soil utilization generally comes into one's own abroad.The soil utilization promptly mud be applied to farmland, forest land, grow seedlings, ornamental plant, turf, park, herbage, fruit tree, vegetables, golf course, the ground of reclaiming wasteland, landfill pit, fixing seabeach, expressway greening band and the building island of Gong travelling etc.
At present, the outlet of China's municipal sludge mainly contains landfill and soil utilization.The disposal costs of landfill is higher, as Beijing every year only spending of trucking costs of sludge disposal just reach more than 1,000 ten thousand yuan.The soil utilization also is the mud without stabilization treatment, is easy to produce secondary pollution.Thereby before the soil utilized, it was necessary that mud is carried out stabilization treatment.
The stabilization treatment method of sewage sludge is more, considers that it is more appropriate that mud is carried out composting to the soil utilization after the sludge stabilizing processing.Amendment that developed countries such as the U.S. add in the sludge composting process and swelling agent are mainly wood chip, the Pericarppium arachidis hypogaeae of adding, stalk, leaf, a rubbish etc. are also arranged, because amendment, swelling agents such as wood chip have participated in the DeR of microorganism in the composting process, become fragile gradually, diminish, be not easy to separate, for the wood fragments bits are fully become thoroughly decomposed, have to prolong the stack retting time, the compost cycle generally long (2-6 month), simultaneously, in order to satisfy the requirement of sludge compostingization, need constantly to replenish new wood chip, the rate of consumption of wood chip is increased, and expense improves.
Abroad generally sludge composting is sold, economic benefit is lower.The existing fertilizer production breach of China is bigger, and chemical fertilizer industry develops to composite fertilizer's direction, mud and chemical fertilizer compound are made organic composite fertilizer, both can solve the environmental problem of sludge disposal, can make full use of the nutrient resource in the mud again, drive the sound development of wastewater treatment in China cause, thereby can obtain good economy and environmental benefit.
The purpose of this invention is to provide a kind of is the method that main raw material is made organic composite fertilizer with the municipal sludge, solving the handling problems of the mud that sewage work produces, and makes full use of a large amount of organic matters and the micronutrient element that contains in the mud; Use a kind of cheap, and repeatedly used expansion amendment, shorten the compost cycle, overcome the deficiency of above-mentioned technology.
Accompanying drawing 1 is a process flow sheet of the present invention.
Be described in detail implementation procedure of the present invention below in conjunction with accompanying drawing 1:
Utilize the method for preparing compound organic fertilizer from municipal sludge, may further comprise the steps successively:
A, mud is mixed with zeolite, carry out aerobic fermentation to becoming thoroughly decomposed;
B, the mud that will become thoroughly decomposed and zeolite sieving separating, the sludge composting that obtains becoming thoroughly decomposed;
C, in above-mentioned sludge composting, add the inorganic fertilizer granulation of preparing burden and get final product.
Because mud granule is fine and closely woven, the water content height lumps easily, and free spatial domain is few, is unfavorable for ventilation oxygen-supplying, is difficult to reach the purpose of aerobic sigestion.And, therefore, should add swelling agent, amendment because fermentation is in anaerobic state and easily produces stench, to adjust the material situation, play the expansion supporting role and satisfy the requirement of composting process or equipment material.Amendment can be different materials with swelling agent, can be same material also, is determined on a case-by-case basis.It is that 2 * 2cm-5 * 5cm, density are 1.9-2.3g/cm that the present invention selects particle diameter for use 3, unit weight is 0.8-1.5g/cm 3Zeolite be expansion amendment (amendment and swelling agent being united two into one) with the two function, compare with existing wood chip, have that water-absorbent is strong, the contamination-free stripping, advantage such as can use repeatedly.
Sludge of sewage treatment plants is mixed with zeolite, mud is 1 with zeolite mixed volume ratio: 1-3, carry out aerobic fermentation, the high temperature that microbial process produces (general sustainable more than 3 days at the high-temperature time more than 55 ℃) is with decomposing organic matter, kill pathogenic bacteria and parasite (ovum), 2-4 week can become thoroughly decomposed, and piles the rotten sewage sludge nitrogen content 2-4% that crosses after testing, and containing Vanadium Pentoxide in FLAKES is 0.5-2.5%, containing potassium oxide is 0.3-1%, and organic content reaches 20-60%.Preferably add a certain amount of returned sluge compost in mud and the zeolite mixing process, be convenient to quick composting, mud, zeolite and returned sluge compost three mixed volume ratio are 1: 1-3: 0.5-1.The mud and the zeolite that will become thoroughly decomposed sieve, and the sludge composting that obtains becoming thoroughly decomposed, is pulverized at the sludge composting that becomes thoroughly decomposed above-mentioned oven dry, add 40～90% nitrogen, phosphorus, potash fertilizer and prepare burden, and carry out granulation after stirring, oven dry can obtain organic composite fertilizer.
Use above-mentioned technology, take any granulation mode, all can produce and meet State Standard of the People's Republic of China's (national standard ZB G21002-87), free of contamination complex fertilizer product, reached deodorizing and germ-resistant purpose through the rotten sewage sludge of crossing of high temperature nuclear reactor.
Advantage of present method and positively effect: 1, this method is utilized the expansion amendment of zeolite as sludge composting, does not participate in the microbiological deterioration reaction, and wastage rate are low, and are reusable, and obtain easily, with low cost.2, the chemical fertilizer that is added in the compound manure of present method preparation can promptly discharge, and the degraded gradually under the soil microorganisms effect of a large amount of organic matters in the mud, make the nutrient in the fertilizer have slow-releasing again, therefore, the composite fertilizer of preparation has organic content height, with low cost, characteristics such as fertilizer efficiency is lasting, plant recovery of nutrient height, and the physical behavior to soil also can play improving effect simultaneously.3, the present invention makes mud reach harm reductionization, simultaneously this resource is effectively utilized.
Further specify the present invention below in conjunction with embodiment:
Embodiment 1:
To select water content for use be 80% sewage sludge with particle diameter is that the zeolite of 3 * 3cm and water content are that 40% recycled sludge compost mixes by 1: 1: 1 volume ratio, carries out aerobic fermentation, and ventilation rate is 20m 3Air/m 3Fertilizer. hour, after 18 days, sludge composting that will become thoroughly decomposed and zeolite sieving separating, containing N after testing in the sludge composting is 3%, contains P 2O 5Be 2%, contain K 2O is 1%; Sludge composting is through oven dry (temperature is lower than 100 ℃) and pulverizing; get the 172kg sludge composting; add urea 211kg, calcium superphosphate 536kg, Repone K 81kg; these chemical fertilizer and sludge composting are stirred, adopt the rotary drum granulator granulation afterwards, add 20% moisture according to the addition of mud; in granulation process, adopt hotblast stove to send hot blast; make the complex fertilizer product moisture content of production be lower than 5%, last further oven dry promptly gets Nitrogen, Phosphorus and Potassium 1030kg.Nitrogen, phosphorus, potassium ratio are N: P in the organic composite fertilizer of making 2O 5: K 2O=10: 10: 5, total content was 25%, met the standard of country about compound manure.
Embodiment 2:
To select water content for use be 70% sewage sludge with particle diameter is that the zeolite of 2 * 2cm mixes by 1: 3 volume ratio, carries out aerobic fermentation, and ventilation rate is 10m 3Air/m 3Fertilizer. hour, after 22 days, sludge composting that will become thoroughly decomposed and zeolite sieving separating, nitrogen content is 4% in the sludge composting after testing, and containing Vanadium Pentoxide in FLAKES is 2%, and containing potassium oxide is 0.5%; Sludge composting is through oven dry (temperature is lower than 100 ℃) and pulverizing; get the 70kg sludge composting; add urea 216kg, calcium superphosphate 548kg, Repone K 166kg; these chemical fertilizer and sludge composting are stirred, adopt the rotary drum granulator granulation afterwards, add 20% moisture according to the addition of mud; in granulation process, adopt hotblast stove to send hot blast; make the complex fertilizer product moisture content of production be lower than 5%, last further oven dry promptly gets Nitrogen, Phosphorus and Potassium 1025kg.Nitrogen, phosphorus, potassium ratio are N: P in the organic composite fertilizer of making 2O 5: K 2O=10: 10: 10, total content was 30%.
Embodiment 3:
To select water content for use be 90% sewage sludge with particle diameter is that the zeolite of 5 * 5cm and water content are that 40% recycled sludge compost mixes by 1: 2: 0.5 volume ratio, carries out aerobic fermentation, and ventilation rate is 25m 3Air/m 3Fertilizer. hour, after 25 days, sludge composting that will become thoroughly decomposed and zeolite sieving separating, nitrogen content is 3.5% in the sludge composting after testing, and containing Vanadium Pentoxide in FLAKES is 2.5%, and containing potassium oxide is 1%; Sludge composting is through oven dry (temperature is lower than 100 ℃) and pulverizing; get the 282kg sludge composting; add urea 200kg, calcium superphosphate 406kg, Repone K 112kg; these chemical fertilizer and sludge composting are stirred, adopt the rotary drum granulator granulation afterwards, add 20% moisture according to the addition of mud; in granulation process, adopt hotblast stove to send hot blast; make the complex fertilizer product moisture content of production be lower than 5%, last further oven dry promptly gets Nitrogen, Phosphorus and Potassium 1045kg.Nitrogen, phosphorus, potassium ratio are N: P in the organic composite fertilizer of making 2O 5: K 2O=10: 8: 7, total content was 25%.
Embodiment 4:
To select water content for use be 85% sewage sludge with particle diameter is that the zeolite of 3 * 4cm and water content are that 42% recycled sludge compost mixes by 1: 1: 0.5 volume ratio, carries out aerobic fermentation, and ventilation rate is 20m 3Air/m 3Fertilizer. hour, after 22 days, sludge composting that will become thoroughly decomposed and zeolite sieving separating, nitrogen content is 3% in the sludge composting after testing, and containing Vanadium Pentoxide in FLAKES is 2%, and containing potassium oxide is 0.4%; Sludge composting is through oven dry (temperature is lower than 100 ℃) and pulverizing; get the 270kg sludge composting; add urea 204kg, calcium superphosphate 526kg; these chemical fertilizer and sludge composting are stirred, adopt the rotary drum granulator granulation afterwards, add 20% moisture according to the addition of mud; in granulation process, adopt hotblast stove to send hot blast; make the complex fertilizer product moisture content of production be lower than 5%, last further oven dry promptly gets binary compound fertilizer 1040kg.Nitrogen, phosphorus ratio are N: P in the organic composite fertilizer of making 2O 5=10: 10, total content is 20%.

Claims (6)

1, a kind of method of utilizing preparing compound organic fertilizer from municipal sludge may further comprise the steps successively:
A, mud is mixed with zeolite, carry out aerobic fermentation to becoming thoroughly decomposed;
B, the mud that will become thoroughly decomposed and zeolite sieving separating, the sludge composting that obtains becoming thoroughly decomposed;
C, in above-mentioned sludge composting, add the inorganic fertilizer granulation of preparing burden and get final product.
2, the manufacture method of organic composite fertilizer according to claim 1 is characterized in that: also be added with the returned sluge compost in mud and the zeolite mixing process and together carry out aerobic fermentation.
3, the manufacture method of organic composite fertilizer according to claim 1 and 2 is characterized in that: the zeolite particle diameter of selecting for use is that 2 * 2cm-5 * 5cm, density are 1.9-2.3g/cm 3, unit weight is 0.8-1.5g/cm 3
4, the manufacture method of organic composite fertilizer according to claim 1 is characterized in that: mud is 1 with zeolite mixed volume ratio: 1-3.
5, the manufacture method of organic composite fertilizer according to claim 2 is characterized in that: mud, zeolite and returned sluge compost three mixed volume ratio are 1: 1-2: 0.5-1.
6, according to the manufacture method of claim 1,2,4 or 5 described organic composite fertilizers, it is characterized in that: the ventilation rate that carries out air in the aerobic fermentation process is 10-25m 3Air/m 3Fertilizer. hour.
CNB001137603A 2000-03-16 2000-03-16 Process for preparing compound organic fertilizer from municipal sludge Expired - Fee Related CN1137870C (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101381249B (en) * 2008-10-14 2011-07-20 邹炎 Method for preparing sludge frozen composite fertilizer and sludge frozen composite fertilizer
CN101367678B (en) * 2008-09-27 2011-09-21 哈尔滨工业大学 Uses of amendment in sludge composting
CN101618978B (en) * 2009-08-03 2012-05-23 沈阳师范大学 Sludge aerobic mechanical composting method and dynamic roller composting device
CN103539590A (en) * 2013-11-07 2014-01-29 北京富晶聚丰环保投资有限公司 Organic-inorganic compound fertilizer and production method thereof
CN103864476A (en) * 2014-03-11 2014-06-18 湖州铁佛耐火材料有限公司 Pelleting system
CN105272396A (en) * 2015-10-08 2016-01-27 武汉纺织大学 Composting treatment method of excess sludge from urban sewage treatment plant
CN107347498A (en) * 2017-08-15 2017-11-17 中林山水（北京）生态科技股份有限公司 The method for repairing Nutrition Soil using organic waste and sludge manufacture mine
CN108299025A (en) * 2017-12-29 2018-07-20 广州市环境保护工程设计院有限公司 A kind of application of black and odorous water remedying sludge haydite in planting
CN110746211A (en) * 2019-12-05 2020-02-04 深圳市铁汉生态环境股份有限公司 Method for reducing ammonia dissipation in sludge aerobic composting process by combining textile waterproof breathable film covering and zeolite adsorption

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101367678B (en) * 2008-09-27 2011-09-21 哈尔滨工业大学 Uses of amendment in sludge composting
CN101381249B (en) * 2008-10-14 2011-07-20 邹炎 Method for preparing sludge frozen composite fertilizer and sludge frozen composite fertilizer
CN101618978B (en) * 2009-08-03 2012-05-23 沈阳师范大学 Sludge aerobic mechanical composting method and dynamic roller composting device
CN103539590A (en) * 2013-11-07 2014-01-29 北京富晶聚丰环保投资有限公司 Organic-inorganic compound fertilizer and production method thereof
CN103864476A (en) * 2014-03-11 2014-06-18 湖州铁佛耐火材料有限公司 Pelleting system
CN105272396A (en) * 2015-10-08 2016-01-27 武汉纺织大学 Composting treatment method of excess sludge from urban sewage treatment plant
CN105272396B (en) * 2015-10-08 2019-03-29 武汉纺织大学 A kind of excess sludge of municipal sewage plant composting treatment method
CN107347498A (en) * 2017-08-15 2017-11-17 中林山水（北京）生态科技股份有限公司 The method for repairing Nutrition Soil using organic waste and sludge manufacture mine
CN108299025A (en) * 2017-12-29 2018-07-20 广州市环境保护工程设计院有限公司 A kind of application of black and odorous water remedying sludge haydite in planting
CN110746211A (en) * 2019-12-05 2020-02-04 深圳市铁汉生态环境股份有限公司 Method for reducing ammonia dissipation in sludge aerobic composting process by combining textile waterproof breathable film covering and zeolite adsorption

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