CN1294106C - High-temperature composting process for waste by the forced combination with natural ventilation - Google Patents
High-temperature composting process for waste by the forced combination with natural ventilation Download PDFInfo
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- CN1294106C CN1294106C CNB2004100160789A CN200410016078A CN1294106C CN 1294106 C CN1294106 C CN 1294106C CN B2004100160789 A CNB2004100160789 A CN B2004100160789A CN 200410016078 A CN200410016078 A CN 200410016078A CN 1294106 C CN1294106 C CN 1294106C
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- 238000009264 composting Methods 0.000 title claims abstract description 57
- 238000009423 ventilation Methods 0.000 title claims abstract description 56
- 239000002699 waste material Substances 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000008569 process Effects 0.000 title abstract description 9
- 239000002910 solid waste Substances 0.000 claims abstract description 6
- 239000004744 fabric Substances 0.000 claims abstract description 5
- 239000002361 compost Substances 0.000 claims description 18
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- 229910052760 oxygen Inorganic materials 0.000 claims description 5
- 230000003203 everyday effect Effects 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000010813 municipal solid waste Substances 0.000 abstract description 4
- 238000005273 aeration Methods 0.000 description 11
- 239000007789 gas Substances 0.000 description 11
- 238000000855 fermentation Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 230000004151 fermentation Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000004332 deodorization Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 230000004060 metabolic process Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000001877 deodorizing effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000003434 inspiratory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
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- 239000005416 organic matter Substances 0.000 description 1
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- 238000002203 pretreatment Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010801 sewage sludge Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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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
-
- 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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- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
一种强制与自然通风结合的废弃物高温堆肥化方法，涉及一种条垛式固体废弃物高温堆肥化工艺。先确定堆体及堆肥化场地尺寸。然后对场地做防渗和排水处理。接着堆设级配碎石，形成条状底部通气层。其特点是在通气层上设置垂直通气管底座，底座的筒壁设有扇形的开孔区，底座内插有同样开有扇形的开孔区的通气管，插入时其下部通气孔与筒壁的开孔区错开密闭。垃圾进场堆成梯形截面垛，覆盖浸塑布。垂直通气管联接吸气机以40m3/min按间歇方式对堆体进行吸气式强制通风。当堆体平均温度＞55℃后，停止强制通风，将通气管转动90°使下部通气孔与底部通气层联通，进入强化自然通风堆肥化，至堆温≤40℃时，堆肥化完成。本发明堆温均匀、能耗节约、工程和运行费用减少，具有显著的经济效益。本发明可于用于各种固体废弃物堆肥化。
The invention discloses a waste high-temperature composting method combining forced and natural ventilation, which relates to a high-temperature composting process of strip-stacked solid waste. First determine the size of the heap and the composting site. Then do anti-seepage and drainage treatment on the site. Then stack graded gravel to form a strip-shaped bottom ventilation layer. It is characterized in that a vertical ventilation pipe base is set on the ventilation layer, and the cylinder wall of the base is provided with a fan-shaped opening area, and a ventilation pipe with the same fan-shaped opening area is inserted in the base, and the lower ventilation hole and the cylinder wall are inserted into the base. The opening area is staggered and closed. Garbage enters the site and is piled into trapezoidal cross-section piles, covered with plastic-impregnated cloth. The vertical ventilation pipe is connected with the aspirator to carry out suction-type forced ventilation to the pile in an intermittent manner at 40m 3 /min. When the average temperature of the pile body is higher than 55°C, the forced ventilation is stopped, and the ventilation pipe is rotated 90° to connect the lower ventilation hole with the bottom ventilation layer, and enter into composting with enhanced natural ventilation. When the pile temperature is ≤40°C, the composting is completed. The invention has the advantages of uniform pile temperature, energy saving, project and operation cost reduction, and remarkable economic benefits. The invention can be used for composting various solid wastes.
Description
Technical field
The present invention relates to bar buttress formula solid waste high temperature composting technical field, specifically be meant by the composting fermentation technique multiple solid organic castoffs such as domestic refuse, municipal sewage sludge, agricultural stalk, food-processing refuse, fowl and animal excrement, oilfield waste thing to be reached innoxious back utilization becomes the technology of resource utilization as the soil.
Background technology
The technology of composting technology can be divided into fermentation cabin formula and two kinds of basic types of non-fermentation cabin formula.Fermentation cabin formula composting technology, finish the space of composting fermentation as waste with the composting reactor of various geometrical shapies, its overall advantage is that the heat retaining property in the composting process is better, is easy to the temperature (55 ℃) that makes the composting material reach innoxious requirement and keeps more than 5 days.But material generally need specific equipment into and out of the storehouse, the cost of fermentation cabin itself is higher in addition, therefore suitable being applied in the big large-scale composting engineering of treatment capacity.Non-fermentation cabin formula composting process, its compost space are on the terrace through suitably handling, and directly stack the stacking (heap body) that forms with waste.Present non-fermentation cabin formula composting process all is to adopt bar buttress formula compost method: form strip bottom unsaturated zone with perforation ventpipe and rubble on the ground at dung yard earlier, then waste is banked up along the length direction of unsaturated zone and formed the bar stack body of trapezoid cross section, the ventpipe segmentation is established valve and is communicated with gas blower or suction fan, with air blast or air inducing mode, temperature according to different segmentation heap bodies, the compost time etc. are forced for air to the heap body, so that waste is under the metabolism of aerobic compost flora, finish the composting fermentation, make it to become the compost that the harmless soil done of health utilizes.The subject matter of this technology is that the heat-retaining condition of heap body is relatively poor, and the heap surface layer is difficult to reach the temperature condition of the innoxious requirement of above-mentioned health.Have for this reason and adopt matured compost to cover the heap surface, improving the way of heat-retaining condition, but actually operating is too complicated.Because the air feed of heap body adopts the forced ventilation mode, both increase the energy consumption of composting process in addition, also further strengthened the heat radiation of heap body, more be unfavorable for piling the reach a high temperature condition of (＞55 ℃) of body.In addition, the composting tail gas deodorization of this technology is handled and is difficult to solve, though being arranged, the air draught type of employing forced ventilation mode collects composting tail gas, pass through the composting tail gas deodorization technique of matured compost filter tank deodorization then, but the upper layer that air draught type forced ventilation mode makes the heap body be difficult for insulation becomes the principal passage that extraneous Cryogenic air enters the heap body, make the problem of the difficult insulation of heap body more outstanding, simultaneously, because the air draught position is positioned at the bottom unsaturated zone that is easy to ponding, laying dust, the foam removal filter plant of the necessary configure dedicated of suction fan, also unreasonable economically.
Summary of the invention
The object of the present invention is to provide and a kind ofly reduce the ventilation energy consumption, reduce the thermosteresis of heap body, solve the solid waste high temperature composting method of composting tail gas deodorizing problem simultaneously.
In order to achieve the above object, the present invention carries out through the following steps: comprise earlier by garbage treatment quantity determine composting place size, heap body sectional dimension, bar buttress spacing, every day composting volume of waste and composting cycle.Then antiseepage, draining processing are done in the place, lay concrete in the composting place and carry out the antiseepage processing, in place periphery, the field waterways is set, and is communicated with the pump well and the storagetank that catchments respectively.Strip bottom unsaturated zone then is set, establish the graded broken stone that thickness is 0.2m by heap body bottom width heap, form the bottom unsaturated zone, be characterized in, on unsaturated zone, along the length axes direction, every interval 5m is provided with a vertical aeration base, base is fixed in ground, place, and base is a round shape, has the hole in two 30 ° of sectors of barrel circumferential direction.In base, insert ventpipe then, make the district of ventpipe lower end and the same perforate of base stagger 90 ° earlier, so that the ventilating pit of bottom is airtight, make relative sealing between ventpipe lower end and the bottom unsaturated zone, solid waste rubbish can be transported the field and pile the trapezoid cross section buttress.Stack after the heap body reaches the cross-sectional shape requirement at the enterprising windrow body of bottom unsaturated zone, the cloth covering is moulded with soaking in the heap surface, then client link lift pump on the ventpipe is carried out the forced ventilation composting, is 40m by the ventilation flow rate of every ventpipe
3/ min carries out air-breathing mode forced ventilation to the heap body, ventilates and is undertaken by intermittent type, and logical, blowing-out time ratio is 1/12～1/2.After filtering deodorization, the matured compost layer of the exhaust of lift pump through being provided with in addition discharge.Measure the warm rising situation of heap, after heap body medial temperature＞55 ℃, disconnect the connection of ventpipe upper end lift pump, stop forced ventilation, ventpipe is rotated 90 °, its lower end aperture area is overlapped with the fan-shaped aperture area of base, make ventpipe bottom and bottom unsaturated zone UNICOM, utilize the temperature head of heap body and environment, drive air and between environment, bottom unsaturated zone and vertical ventpipe, flow in the natural convection mode, to the oxygen supply of heap body, realize the enhanced natural ventilating composting of heap body.Measure the heap temperature, when piling body medial temperature≤40 ℃, composting is finished, and matured compost transports.Extract vertical aeration then, after pipeline, socket are cleared up, carry out the composting of a new round again.
The present invention has following advantage:
1. cover with gas impermeable material owing to heap of the present invention surface, the direct convection of air heat radiation of heap surface is effectively controlled, reduce composting process energy consumption, and prolongation heap height temperature is held time, therefore compare with existing open type or with the matured compost soverlay technique, heap body high insulating effect of the present invention, thus working cost saved.
2. because compost initial stage of the present invention employing forced ventilation, air is entered by the bottom unsaturated zone, contact with the bottom heap body that heat insulation effect is better, temperature is higher in the heap body, after its heating, be transmitted to heap body rest part again, come out from ventpipe middle part tapping again, therefore the present invention has avoided heap body local overcooling, overheated, helps piling the even of temperature, makes ferment effect good especially.
Since the present invention in the heap temperature when reaching a high temperature, promptly utilize natural ventilation to piling the forced ventilation needs that the body oxygen supply has replaced considerable part in the composting process, make the overall heat loss through convection amount of heap body controlled, the heat that biological metabolism is produced resides in the heap body, helps piling body and heats up and the temperature maintenance; The present invention has simultaneously also reduced the energy consumption that is used for mechanical forced ventilation, so the present invention has remarkable economic efficiency.
4. because the air draught position of the present invention during with forced ventilation is positioned at the vertical aeration upper end, do not have water and grit deposition in the pipe, and the mist of can also the sedimentation air-flow carrying secretly, the air-flow that blower fan sucks is than the cleaning that sucks from the bottom unsaturated zone, need not to be provided with complicated retaining foam dedusting pretreater, simplify equipment, saved investment.
5. because the present invention by air-breathing collection composting tail gas, only need make tail gas through the filtration of matured compost heap body, just can be to its deodorizing.Effect with the environmental influence that reduces composting.
Description of drawings
Fig. 1 is a process flow sheet of the present invention
Fig. 2 is a heap body synoptic diagram of the present invention
Fig. 3 is the aperture area sealing synoptic diagram of ventpipe and base
Embodiment
See also Fig. 1,2,3.At first determine the sectional dimension of heap body: present embodiment is got high about 2m, bottom width 5～7m, side slope 1: 1.Bar buttress spacing 1～1.5m.Every day, the volume of waste of unit surface place composting was 1.1～1.2m
3/ m
2, 20～30 days composting cycles, the size in definite composting place in view of the above.For example: day processing volume of waste 50m
3/ day, 25 days composting cycles, then required site area=(50m
3/ day * 25 days) ÷ 1.2m
3/ m
2=1042m
2, this area does not comprise waste is carried out pre-treatment and matured compost is carried out the required site area of precision processing.Then, carrying out the anti-drainage position that blends in place manages: the composting place is laid concrete and is carried out the antiseepage processing, handles the back ground bearing pressure and answers 〉=0.5Mpa.Place periphery and the cover plate waterways is set along bottom unsaturated zone two sides respectively, the percolate of a perimeter gutter and an internal drainage ditch imports pump well respectively and the storagetank that catchments.Strip bottom unsaturated zone is set then, establishes graded broken stone (particle diameter 5-30mm) by heap body bottom width heap in the place and form bottom unsaturated zone 6 (thickness 0.2m).
Be characterized in that on unsaturated zone 6, along the length axes direction, every interval 5m is provided with a vertical aeration base 5, base 5 is fixed in ground, place, and base 5 is a round shape, high 0.25m, internal diameter 0.3m, wall thickness＞14mm, PVC or HDPE material.Have the hole in two 30 ° of sectors of barrel circumferential direction.Aperture 10mm, pitch of holes 25mm, square uniform distribution forms aperture area 8.In base, insert ventpipe 1 then, make the district of ventpipe 1 lower end and base 5 same perforates stagger 90 ° earlier,, make relative sealing between ventpipe lower end and the bottom unsaturated zone so that the ventilating pit of bottom is airtight.Wherein vertical aeration 1 is the cylinder of upper end with 90 ° of elbows and joint flange 2, drum length 〉=2.5m; Its wall is divided into two aperture area from the bottom to top, be following aperture area apart from lower port 0.25m scope, two 30 ° of relative sectors, offer bar hole with radial parallel, the wide 10mm in hole, 1/12 of Kong Changwei wall girth, apart from lower port 0.4m-2.0m is last aperture area, wall is offered aperture 8mm, pitch of holes 16mm, and the fan-shaped aperture area 7 of ventpipe is formed in the uniform hole of equilateral triangle.Ventpipe 1 wall thickness＞14mm, material are PVC or HDPE.Coupling tolerance＜the 5mm of ventpipe 1 external diameter and base 5 internal diameters, ventpipe 1 is inserted base 5 interior backs (during insertion, ventpipe 1 lower end aperture area 7 and base 5 aperture area 8 stagger 90 °), body 4 stackings can piled, the rubbish that various wastes are formed march into the arena stack reach the heap body section shape need of above-mentioned trapezoid after, cloth 3 coverings are moulded with soaking in heap body 4 surface, soak to mould cloth 3 and can adopt to soak and mould canvas or 400g/m
2The anti seepage membrane of the compound 0.5mmPVC of geotextile.Can carry out dual ventilation composting technology then: the flange 2 of ventpipe 1 upper end and the flexible vent pipe that is connected lift pump are connected, heap body 4 is carried out forced ventilation, and be 40m by the ventilation flow rate of every ventpipe 1 in air-breathing mode
3/ min carries out intermittent ventilation, and logical, blowing-out time ratio 1/12～1/2 is provided with by not being all of waste character.Open blower fan, carry out the forced ventilation composting earlier, in bottom unsaturated zone 6 that is communicated with atmosphere and vertical aeration 1 under the acting in conjunction of negative inspiratory pressure, the gas flow cone that will to form with vertical ventpipe 1 in the heap body 4 be the axle center, formed gas flow cone is interlaced between the adjacent ventpipe 1, add the diffusion mass transfer effect of air when flowing through heap body 4, can make heap body 4 integral body obtain oxygen supply, heap temperature (heap temperature) rises rapidly.By the exhaust of air suction type blower fan, the composting tail gas of piling body 4 after filtering deodorization, matured compost is discharged and the acquisition deodorising effect simultaneously.After heap body medial temperature (establishing two points for measuring temperature at 0.15m under heap body center and the surface at least)＞55 ℃, flexible vent pipe is unloaded from the vertical aeration upper end, and with 90 ° of ventpipe 1 rotations, its lower end aperture area 7 is overlapped with the aperture area 8 of base 5, and heap body 4 can enter the natural ventilation state and carry out composting.Be in pyritous heap body in because of vertical aeration 1 this moment, air themperature wherein is much larger than envrionment temperature, density is less than the outside air of heap body periphery, can form pressure differential power thus, drive air at the bottom unsaturated zone, vertical aeration, circulative convection between ambient atmosphere, the wall of vertical aeration and bottom unsaturated zone upper surface then become the interface of air to heap body internal diffusion, make the heap body obtain effective oxygen supply, aerobic microbiological is continued the metabolism of organic matter, the heat that can not make simultaneously the heap body again during as forced ventilation violent shedding, can make the heap body keep the condition of high temperature for a long time, reach the purpose of waste being carried out the health harmless treatment.When piling body medial temperature＜40 ℃, finish composting, matured compost can transport from heap body 4.Extract vertical aeration 1 then, after pipeline, base 5 are cleared up, carry out the composting of a new round again.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100160789A CN1294106C (en) | 2004-02-04 | 2004-02-04 | High-temperature composting process for waste by the forced combination with natural ventilation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100160789A CN1294106C (en) | 2004-02-04 | 2004-02-04 | High-temperature composting process for waste by the forced combination with natural ventilation |
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| Publication Number | Publication Date |
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| CN1557783A CN1557783A (en) | 2004-12-29 |
| CN1294106C true CN1294106C (en) | 2007-01-10 |
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| CN100340530C (en) * | 2005-06-14 | 2007-10-03 | 万若（北京）环境工程技术有限公司 | Refuse biochemical aerobic treatment device and its control method |
| CN100567219C (en) * | 2007-04-17 | 2009-12-09 | 同济大学 | A kind of two-way ventilation and air pressure turning composting method |
| CN101817701B (en) * | 2010-05-12 | 2012-12-05 | 万若（北京）环境工程技术有限公司 | System and method for ventilating stacks and collecting exhaust gases and percolate of compost |
| CN101947534A (en) * | 2010-06-29 | 2011-01-19 | 同济大学 | Hydrolysis-aerobiosis two-section biological drying method for household garbage |
| CN103435384A (en) * | 2013-07-12 | 2013-12-11 | 盐城市新洋农业试验站 | Aerobic fermentation method |
| CN103664269A (en) * | 2013-12-16 | 2014-03-26 | 黑龙江省牡丹江农垦巨丰有机肥生产有限公司 | Temperature increasing and reserving tank and method for biologically and aerobically fermenting solid organic waste in winter |
| CN104163669A (en) * | 2014-09-10 | 2014-11-26 | 江苏菲力环保工程有限公司 | Bottom bleeding device for sludge aerobic compost fermentation |
| CN104261920A (en) * | 2014-10-20 | 2015-01-07 | 云南省农业科学院农业环境资源研究所 | Method for accelerating aerobic composting rate of agricultural solid wastes |
| CN105016791A (en) * | 2015-05-18 | 2015-11-04 | 浙江海洋学院 | Treatment system for waste and filtrate in composting plant |
| CN105000927A (en) * | 2015-05-18 | 2015-10-28 | 浙江海洋学院 | Composting and fermentation system mixing kitchen waste and municipal sludge |
| CN105036835A (en) * | 2015-05-18 | 2015-11-11 | 浙江海洋学院 | Domestic sludge aerobiotic quick composting fermentation system |
| CN105638120A (en) * | 2016-02-02 | 2016-06-08 | 农业部规划设计研究院 | Straw safety storage method under natural air-dry condition |
| CN106365716A (en) * | 2016-08-26 | 2017-02-01 | 天津绿茵景观生态建设股份有限公司 | Environment-friendly in-situ compost rejuvenation ditch |
| CN108935811A (en) * | 2018-09-18 | 2018-12-07 | 晏坚 | A kind of production method of cogongrass cliff berry Pu'er tea |
| CN109479417A (en) * | 2018-11-08 | 2019-03-19 | 张锐 | It is a kind of directly soil remediation deep soil to be promoted to add fertile device |
| CN111233575A (en) * | 2020-01-22 | 2020-06-05 | 江苏朗逸环保科技有限公司 | Method for preparing organic fertilizer by microbial agent without mildewing treatment |
| CN111574266A (en) * | 2020-05-18 | 2020-08-25 | 东北农业大学 | Negative pressure type compost gas distribution device and method |
| CN112209760A (en) * | 2020-12-03 | 2021-01-12 | 河南逸凡蔚岚生物科技有限公司 | Method and structure for coating film to adjust air holes |
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| CN1436757A (en) * | 2003-03-13 | 2003-08-20 | 清华大学 | Forced ventilation system for organic waste compost bin |
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2004
- 2004-02-04 CN CNB2004100160789A patent/CN1294106C/en not_active Expired - Lifetime
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317463A (en) * | 2000-04-07 | 2001-10-17 | 中国科学院生态环境研究中心 | Static process for preparing compost in house by time-temp controlled ventilation and its equipment |
| CN1436757A (en) * | 2003-03-13 | 2003-08-20 | 清华大学 | Forced ventilation system for organic waste compost bin |
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| CN1557783A (en) | 2004-12-29 |
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