CN1209324C - Method of producing composite organic fertilizer using city sludge - Google Patents
Method of producing composite organic fertilizer using city sludge Download PDFInfo
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- CN1209324C CN1209324C CNB021067449A CN02106744A CN1209324C CN 1209324 C CN1209324 C CN 1209324C CN B021067449 A CNB021067449 A CN B021067449A CN 02106744 A CN02106744 A CN 02106744A CN 1209324 C CN1209324 C CN 1209324C
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- sludge
- 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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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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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Abstract
The present invention relates to a method for producing composite organic fertilizers by using urban sludge. Natural dehydrant is proportionally used for replacing the traditionally used polyacrylamide to realize half flocculation, and the deficiency of insolubilization of urban sewage and sewage sludge in a flocculation process is relieved. The toxic action of polyacrylamide and the sludge output are reduced. A phosphonic acid solubility material and a heavy metal passivated material are added, a VT bacterium initial detonating agent is accessed for further softening the sewage sludge, and the available nutrients are released. Finally, the three-dimensional compound of organic organisms, inorganic organisms and microorganisms is obtained through the processes of high temperature, high pressure instant thermospray and swelling granulation and secondary inoculated-pathogen. After the urban sewage and the sewage sludge are processed by the method, pathogenic bacteria disappear, organic matter is humified, and the heavy metal stability is enhanced. The shape nutrients used for plant can be increased, and a C/N ratio, the physical behavior, the sanitize degree, the dissolvability, the nutrient balance, etc. are greatly improved.
Description
Technical field
The present invention relates to a kind of method of producing compound organic fertilizer, relate in particular to a kind of method of utilizing municipal sludge to produce three-dimensional (organic and inorganic-microorganism) compound organic fertilizer.
Background technology
Contain plant nutrient ingredients such as a large amount of organic matters, nitrogen, phosphorus in the mud, organic content 20-40% is one to have the waste resource of utility value.
Sludge disposal mainly contains several modes such as burning, sanitary landfill, throwing sea and agricultural use both at home and abroad, but is based on the pressure and the resource utilization consideration of economy and environment, and the ocean is thrown in and is under an embargo gradually; Landfill is many owing to taking up an area of, the easy polluted underground water of penetrating fluid, and problems such as follow-up management expense height, its application also is restricted; Agricultural at present and burning has become two kinds of main modes of sludge disposal.
From foreign development trend, effectively utilize mud in rising trend.The effective rate of utilization of Europe mud from 48% of nineteen ninety brought up to 1998 52%, the U.S. expects mud effective rate of utilization in 2010 and reaches 70%, and with annual 20% speed increase.Shortcomings such as China is the effective rate of utilization only about 20% of mud at present, and technology rests on simple compost substantially, oven dry is handled, and often has the caking sclerosis, meets tide and go mouldy, and biological activity is not high, and security is low.
Mud is a kind of very trickle gel-like texture, if water content is lower than 30%, is easy to sclerosis, and softening again decomposition is just very difficult.Usually the physics furnace drying method that adopts can make sludge moisture content reduce to below 20%, though reached the stable purpose of decrement, mud has become the hard grogs that can not absorb again.
Contain a large amount of pathogenic bacterias in the mud,, can bring follow-up potential potential safety hazard if not carrying out harmless treatment is manured into soil.Common measure is During High-Temperature Composting sterilization, but in case be manured into soil, and contact wetting becomes in the wet process and grows harmful bacterium again easily, brings going mouldy of self and soil.
Contain a large amount of heavy metals in the mud, comprise chromium, copper, zinc, aluminium etc., these heavy metals enter soil so that are accumulated to a certain degree as object and must bring some environmental hazards, also there is not sophisticated heavy metal extraction and separation technology at present, commonly used mainly is some passivating materials, as flyash, the peat composed of rotten mosses, ground phosphate rock etc.
Summary of the invention
The object of the present invention is to provide a kind of method of utilizing municipal sludge to produce compound organic fertilizer.This method can solve softening, going mouldy and problem such as heavy metal contamination in the recycling sludge utilization preferably.
For achieving the above object, the method for utilizing municipal sludge to produce compound organic fertilizer provided by the invention, its key step is as follows:
(1) city domestic sewage is carried out filtering-depositing;
(2) sedimentary mud is delivered in the sludge thickener, and pressed the natural dewatering agent of sludge thickener volumetrical 10% adding, mud is carried out half flocculation;
(3) be half floccular sludge dewatering after will concentrating;
(4) mud after the dehydration is delivered to and is concentrated fermentation unit and carry out modified, make C/N=30/1 (in dewatered sludge, add corn stalk powder, corn cob etc., make material C/N=30/1), add 3% phosphoric acid solvability material and 3% heavy metal passivating material, and add fight power 5% of fertile soil and ferment as primer-detonator, fermentation time is 5-6 days, and turning every day is once piled temperature 〉=55 ℃ of maintenances more than 3 days;
(5) temperature of charge 〉=95 ℃, pressure 〉=22Kg/cm
2The expanded granulation of heat spray is made into fertilizer.
The present invention can also be to carrying out modified through the pretreated mud of step (4) once more, make C/N=25/1 (in dewatered sludge, add corn stalk powder, corn cob etc., make material C/N=25/1), add the fertile soil power 5% of fighting and carry out Secondary Fermentation as primer-detonator, heap temperature 〉=55 ℃, the time is more than 3 days, then through turning airing or oven dry, make moisture≤18%, pulverize and make finished product.
The natural dewatering agent that the present invention adopts is a natural seaweed.
The concentrated fermentation unit that the present invention adopts is that sun power concentrates fermentation unit.
The method of utilizing municipal sludge to produce compound organic fertilizer provided by the invention has following advantage:
(1) adopt natural dewatering agent to replace the polyacrylamide that tradition is used pro rata, realize half flocculation, what alleviate that city sewage and sludge forms in flocculation process does not dissolve defective, reduces the toxic action and the mud volume of polyacrylamide;
(2) heap fermentation adds phosphoric acid neutralization materials and heavy metal passivating material, inserts the rich power primer-detonator of fertile soil, and further softening mud discharges available nutrient;
(3) after high temperature, high pressure transient heat spray expanded granulation, secondary connects bacterium, and it is compound to reach organic and inorganic-microorganism three-dimensional.
City sewage and sludge is after aforesaid method is handled, wherein pathogenic bacteria disappears, organic humusization, and heavy metal stability improves, plant can utilize the form nutrient to increase, and its C/N ratio, physical behavior, innoxious degree, solubleness, nutrient balance etc. have all obtained very big improvement.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Fig. 2 concentrates the fermentation unit synoptic diagram for sun power of the present invention.
Embodiment:
Embodiment 1, prepare three-dimensional composite fertilizer:
Its preparation flow sees also Fig. 1, and solid line is represented the flow process of present embodiment among the figure.At first municipal effluent is carried out filtering-depositing, get sedimentary mud to concentration basin, ratio adding natural seaweed in concentration basin volume 10% is a dewatering agent, make mud become half flocculence, to the machine room dehydration of dewatering, mud after the dehydration is delivered to sun power and is concentrated fermentation unit and carry out modifiedly, and its formula rate is: mud 50-60%, urea 5-10%, Repone K 2-5%, two ammoniums 1%, pine needle powder 5%, alfalfa meal 3%, straw powder 8%, other 8-26% makes C/N=30/1, adds 3% phosphoric acid neutralization materials and (is cicken feces dried, pig manure or cow dung) and 3% heavy metal passivating material (be humic acid powder, flyash, turfy soil etc.), and add fight power 5% of fertile soil and ferment as primer-detonator, fermentation time is 5-6 days, and turning every day is once piled temperature 〉=55 ℃ of maintenances more than 3 days.Spray expanded granulation through high temperature, high pressure transient heat and be made into fertilizer.Its product is black or grey black single-size, largest particle diameter≤6mm; Nitrogen phosphorus potassium total content＞10%, wherein N: P
2O
5: K
2O=5: 2: 3; Organic＞55%; Viable count 〉=5 * 10
7PH＜6.5; Water content≤20%.
The sun power that the present invention adopts concentrates fermentation unit as shown in Figure 2, and this fermentation unit adopts deep slot type drying process that continuously ferments, and 1 meter of groove depth is wide 6 meters, longly is 80-100 rice.The fermentation plant roof truss adopts the camber steel framed structure, and the bottom adopts Steel Concrete to build, and surroundings wall and roofing adopt transparent glass fiber reinforced plastics watt, and transmittance reaches more than 85%, and general room temperature is than outdoor high 5-15 ℃.Major equipment comprises stirrer, horizontal locomotive, oxygenating system etc.This fermenter divides laydown area, fermentation zone and drying zone, and the mud material is stirred to a direction by the fermentation stirrer after stacking, regulating moisture, enter fermentation zone after a couple of days, through thermophilic fermentation, after the part moisture evaporation, enter drying zone, dry gradually, discharging then.The general 5-7 of all processes days.Because it itself is not the emphasis that the present invention will discuss that sun power concentrates fermentation unit, therefore only make above-mentioned schematic illustration in conjunction with synoptic diagram.
Embodiment 2, prepare high efficiency nutritious soil:
See also among Fig. 1 shown in the dotted line.Its operational condition is with embodiment 1, being different from embodiment 1 part is to carry out the compost after modified modified once more, make C/N=25/1, add the fertile soil power 5% of fighting and carry out Secondary Fermentation as primer-detonator, heap temperature 〉=55 ℃, the time is more than 3 days, then through turning airing or oven dry, make moisture≤18%, pulverize and make nutrition soil.Its nitrogen phosphorus potassium total nutrient 〉=2%, organic 〉=38%, viable count 〉=1 * 10
7
Claims (2)
1, a kind of method of utilizing municipal sludge to produce compound organic fertilizer, its key step is as follows:
(1) city domestic sewage is carried out filtering-depositing;
(2) sedimentary mud is delivered in the sludge thickener, and pressed the natural dewatering agent of sludge thickener volumetrical 10% adding, mud is carried out half flocculation;
(3) be half floccular mud after will concentrating through the dehydration of dehydration machine room;
(4) mud after the dehydration is delivered to and is concentrated fermentation and carry out modifiedly, makes C/N=30/1, adds 3% phosphoric acid neutralization materials and 3% heavy metal passivating material, and add fight power 5% of fertile soil and ferment as primer-detonator, fermentation time is 5-6 days, and turning every day is once piled temperature and reached 55 ℃ of maintenances 3 days;
(5) temperature of charge is 95 ℃, pressure 22Kg/cm
2The expanded granulation of heat spray is made into fertilizer;
Described natural dewatering agent is a natural seaweed;
Described phosphoric acid neutralization materials is cicken feces dried, pig manure or cow dung;
Described heavy metal passivating material is humic acid powder, flyash or turfy soil.
2, the method for utilizing municipal sludge to produce compound organic fertilizer as claimed in claim 1, it is characterized in that, the pretreated mud of described step (4) carries out modified once more, makes C/N=25/1, adds the fertile soil power 5% of fighting and carries out Secondary Fermentation as primer-detonator, the heap temperature reaches 55 ℃, time is 3 days, then through turning airing or oven dry, makes moisture≤18%, pulverize, make nutrition soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021067449A CN1209324C (en) | 2002-03-05 | 2002-03-05 | Method of producing composite organic fertilizer using city sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021067449A CN1209324C (en) | 2002-03-05 | 2002-03-05 | Method of producing composite organic fertilizer using city sludge |
Publications (2)
| Publication Number | Publication Date |
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| CN1442393A CN1442393A (en) | 2003-09-17 |
| CN1209324C true CN1209324C (en) | 2005-07-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021067449A Expired - Fee Related CN1209324C (en) | 2002-03-05 | 2002-03-05 | Method of producing composite organic fertilizer using city sludge |
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| CN (1) | CN1209324C (en) |
Families Citing this family (27)
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| CN100369868C (en) * | 2006-09-18 | 2008-02-20 | 广东省农业科学院土壤肥料研究所 | Refined fertilizer produced from sludge and producing method thereof |
| CN101723718B (en) * | 2008-10-31 | 2013-07-10 | 王平 | Method for producing granular organic fertilizer with high content of humic acid by using municipal sludge |
| RU2402511C1 (en) * | 2009-06-15 | 2010-10-27 | Закрытое Акционерное Общество "Твин Трейдинг Компани" | Method of preparing organomineral fertiliser mixture |
| US20130048570A1 (en) * | 2010-04-09 | 2013-02-28 | Basf Se | Concentration of suspensions |
| CN102217469A (en) * | 2010-04-19 | 2011-10-19 | 陆振冈 | Organic cultivation medium and application method thereof |
| CN102092918B (en) * | 2011-01-14 | 2012-09-26 | 中环保水务投资有限公司 | Biological drying method for treating urban domestic dewatered sludge |
| CN102319726B (en) * | 2011-06-15 | 2013-10-30 | 姜桂荣 | Method for comprehensively utilizing low-concentration heavy metal-containing soil improvement and repairing damaged soil by plants after detoxification of contaminated field |
| CN102850096A (en) * | 2012-08-24 | 2013-01-02 | 温志明 | Method for producing organic fertilizer by using high-temperature anaerobic sludge, pig manure and chicken manure as raw materials |
| CN102875205A (en) * | 2012-09-07 | 2013-01-16 | 武汉纺织大学 | Composting method of residual sludge in urban sewage treatment plants |
| CN103771935B (en) * | 2013-03-05 | 2016-03-30 | 杭州爱立特生态环境科技有限公司 | A kind of method making plant nutrition soil |
| CN103467146A (en) * | 2013-09-09 | 2013-12-25 | 北京沃土天地生物科技有限公司 | Method for producing compound organic fertilizer by using municipal sludge |
| CN103708881B (en) * | 2013-12-11 | 2015-09-09 | 山西农业大学 | A kind of active sludge fertilizer |
| CN104529102A (en) * | 2014-12-09 | 2015-04-22 | 涞水丰源环保科技有限公司 | Sludge treatment method |
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| CN105367148A (en) * | 2015-12-14 | 2016-03-02 | 丽水学院 | Efficient aerobic composting method of dehydrated sludge |
| CN105601068A (en) * | 2015-12-30 | 2016-05-25 | 天津市雷鸣生态科技有限公司 | Degradation method for sludge |
| CN107010811A (en) * | 2017-04-28 | 2017-08-04 | 余思哲 | A kind of method of dredging silt fast dewatering |
| CN107266140A (en) * | 2017-05-22 | 2017-10-20 | 江苏绿洲园艺绿化有限公司 | A kind of method for the organic slow-release fertilizer that utilization municipal sludge makes |
| CN107522562A (en) * | 2017-09-26 | 2017-12-29 | 太仓市王秀粮食生产专业合作社 | A kind of processing technology of paper mill sludge organic fertilizer |
| CN107555762A (en) * | 2017-09-30 | 2018-01-09 | 梁山菱花生物科技有限公司 | A kind of flyash replaces the method and device of Lime And Sewage Sludge dehydration |
| CN107652070A (en) * | 2017-11-06 | 2018-02-02 | 张培栋 | Ecological sponge fertilizer is produced with the Chinese medicine slag treatment of wastes with processes of wastes against one another |
| CN110637698A (en) * | 2019-08-29 | 2020-01-03 | 广东清大同科环保技术有限公司 | Organic garden soil prepared from construction waste and municipal sludge |
| CN110665946A (en) * | 2019-10-16 | 2020-01-10 | 新疆世洁名豪能源科技有限公司 | System and method for sorting renewable resources from municipal domestic waste |
| CN110606557B (en) * | 2019-10-21 | 2021-06-01 | 福州大学 | Method for purifying heavy metal in humic acid liquid fertilizer |
| CN110698025A (en) * | 2019-10-28 | 2020-01-17 | 湖北大学 | Domestic sludge slurrying method and application of slurried sludge |
-
2002
- 2002-03-05 CN CNB021067449A patent/CN1209324C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1442393A (en) | 2003-09-17 |
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