CN1702060A - Refuse biochemical aerobic treatment device and its control method - Google Patents
Refuse biochemical aerobic treatment device and its control method Download PDFInfo
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- CN1702060A CN1702060A CNA2005102003274A CN200510200327A CN1702060A CN 1702060 A CN1702060 A CN 1702060A CN A2005102003274 A CNA2005102003274 A CN A2005102003274A CN 200510200327 A CN200510200327 A CN 200510200327A CN 1702060 A CN1702060 A CN 1702060A
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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
An aerobic garbage disposal device setting draught fan beside garbage heap and its control method comprise the following steps: connecting ventilating duct with air outlet of fan; setting air outlet of fan in garbage heap; equipping air content measuring apparatus and temperature measuring apparatus in garbage heap; sending measurement result of measuring instrument into data input pin of controller; control pin of said controller connecting with switch of fan. Said air content measuring apparatus is oxygen measurement set or carbon dioxide measurement set. The invention reduces bad odour from garbage heap, accelerates biochemical aerobic reaction, decreases secondary garbage pollution, increases heating value of garbage, decreases energy consumption of burning plant and decreases cost of garbage disposal system.
Description
(1) technical field
The present invention relates to a kind of devices and methods therefor that organic residue such as rubbish, ight soil, mud is carried out biochemical aerobic (or claiming compost) processing.
(2) background technology
Rubbish, ight soil, mud are when compost, and most organic was carried out under anaerobic state in degradation process before this.Not only speed of response is slow, also produces serious smell and pollutes.Usually adopt the method for collecting waste gas, biofiltration to reduce the discharging of odoring substance in traditional composting process.In biofilter or the pond vegetable filler is housed, as branch, hay and/or slaking compost.Foul smell is by filler, and the odoring substance in the smell is attracted to moistening filler top layer, microbiological deterioration odoring substance under aerobic conditions.Has the problem that processing speed is slow, the time is long.Chinese invention patent (application number 01120522, publication number 1397528) proposes to utilize temperature survey to control composting process.Temperature but control ventilation very big limitation arranged, because can't directly embody the biochemical oxygen consumption situation in the compost with temperature signal.
(3) summary of the invention
The present invention proposes a kind of refuse biochemical aerobic treatment device and control method thereof, solves the problem that reduces the garbage compost stink, quickens biochemical aerobic reaction; Also solve the problem that reduces rubbish secondary pollution degree, reaches minimizing, stabilization; And solve the calorific value that improves rubbish, reduce the problem of incineration plant energy consumption, reduction refuse disposal system expense.
Technical scheme of the present invention: this refuse biochemical aerobic treatment device is characterized in that:
(1), at the other blower fan that is provided with of scrap heap, connect ventilator trunk at the air outlet of blower fan, the air outlet of ventilator trunk places in the scrap heap;
(2), air content measuring apparatus and temperature measuring set, controller of measurement result input of air content measuring apparatus and temperature measuring set are set in scrap heap;
(3), advance one one in the above-mentioned controller and comprise storer, timing register, central processing unit, input unit, output equipment;
(4), above-mentioned controller calculates the measured signal of air content measuring apparatus and temperature measuring set through central processing unit, and compare with preset value, determine the open and close of blower fan, and the output blower fan opens and closes signal;
(5), the output terminal of above-mentioned controller is connected with the switch of blower fan.
The above-mentioned gas content measuring instrument is oxygen measurement or carbon dioxide measurement.
Above-mentioned scrap heap is one and a blower fan or a shared blower fan is set when above respectively that leading on the ventilator trunk of each scrap heap has a stopping valve.
Above-mentioned blower fan is one when above, and a controller or a shared controller are set respectively.
Above-mentioned blower fan is connected with differential pressure controller.
The control method of this refuse biochemical aerobic treatment device is characterized in that following steps are arranged:
Step (1), startup blower fan, controller picks up counting;
Step (2), maximum oxygen saturation ratio O1max, minimum oxygen saturation O1min, rubbish total amount, rubbish water content data and sequence of control are deposited in the storer of controller, the choosing value scope of O1min is 0.1-0.9;
Step (3), read the measured value T1 of the real side value of air content measuring apparatus oxygen saturation O1, temperature measuring set;
Step (4), if O1＜O1min, then start blower fan or open Ventilating valve; If O1 〉=O1max then stops blower fan or closes Ventilating valve.
After step (4), following steps can also be arranged:
Step (5), if O1min＜O1＜O1max, there is no extraneous command for stopping, the instruction of extraneous change input value is arranged, then return step (1);
Step (6), if O1min＜O1＜O1max, there is no extraneous command for stopping, does not have extraneous change input value yet and instructs, then return step (3);
Step (7), if O1min＜O1＜O1max, extraneous command for stopping is arranged, then stop blower fan or close Ventilating valve.
When being used for drying garbage, the control method of refuse biochemical aerobic treatment device is characterized in that following steps are arranged:
Step (a), startup blower fan, controller picks up counting;
Step (b), minimum design temperature T1min, maximum design temperature T1max, rubbish total amount, rubbish water content, start-up temperature Ts, scrap heap temperature variation Δ T1, time period Δ t data and sequence of control are deposited in the storer of controller;
Step (c), read the temperature measured value T1 of temperature measuring set;
Step (d), if T1＞Ts not, does not then return step (c);
Step (e), if T1=T1max, then start blower fan or open Ventilating valve;
Step (f), the real side value O1 that reads air content measuring apparatus, the measured value T1 of temperature measuring set;
Step (g), if T1＜T1max-Δ T1 not, does not then return step (f);
Step (h), if T1＜T1max-Δ T1 be then to stop blower fan or close Ventilating valve.
After step (h), following steps can also be arranged:
Step (i), if no extraneous command for stopping, have extraneous change input value to instruct, then return step (a);
Step (j), if no extraneous command for stopping, does not have the extraneous input value of changing yet and instructs, then return step (c);
Step (k), if extraneous command for stopping is arranged, then stop blower fan or close Ventilating valve.
The span of above-mentioned start-up temperature Ts is 30-90 ℃.
The present invention has fundamentally solved people can't directly determine the problem of operation for a long time according to the real content of oxygen in the compost, and system cost is reduced to minimum.Have following beneficial effect:
1, makes speed of response and temperature of reaction realize maximum simultaneously by Ventilation Control, fermentation time is shortened about 60%, therefore make compost floor space minimum.
2, with the ordinary method ratio, system is more stable, and is more economical;
3, smell is produced reduce to minimum, with ordinary method than reducing more than 90%, therefore do not need special factory building and airtight feed bin.
4, guarantee the aerobic condition of system by Ventilation Control on the one hand, avoided again simultaneously blindly ventilating that therefore the ventilation energy consumption with system drops to minimum, reduces running cost greatly, can save the operation investment more than 50% with the ordinary method ratio.
5, adopt small power to ventilate, making ventilates is more evenly distributed, and only needs a turning in the composting process, does not therefore need expensive turning Special Equipment, and makes the turning energy consumption reduce to minimum, and significantly improve compost quality.
The present invention in whole biochemical aerobic processes, guarantees aerobic state in the scrap heap by to the monitoring of scrap heap oxygen level, temperature and to the control of ventilation, and the speed of response of avoiding anaerobism to bring descends and the foul smell generation.By the control ventilation, realize under system's aerobic state to temperature controlling with to the control of evaporated water (humidity variation).The present invention is when realizing that with utmost dispatch organism at utmost is degraded to the process purpose in the rubbish, and system keeps the fastest speed of response, and stink produces and reduces to minimum, and water evaporation quantity is controlled at minimum.When coming by the biological respinse heat release that moisture comes garbage drying to be purpose in the fastest evaporation rubbish, in the maintenance system all the time under the condition of aerobic, variation control ventilation according to system temperature, the heat energy that wind is discharged in the scrap heap and heating up, with the moisture evaporation of concentrating, reach quick-drying effect simultaneously.The present invention can avoid the not enough foul smell that produces of compost oxygen supply, has shortened the refuse treatment time.Avoid the excessive ventilation of compost, consume too much energy consumption, avoid the organism reaction not exclusively, half product of taking out of is too much, the scrap heap temperature descends.
The present invention remains has enough oxygen to exist in the space of compost, thereby guarantees that the surface that rubbish contacts with gas is in aerobic state.Avoid the oxygen supply deficiency, foul smell is produced control to minimum.The present invention controls the aerobic treatment process of scrap heap by ventilation, temperature, the humidity of control scrap heap.Except junk control being produced the fertilizer, can also pass through aerobic treatment, the bio-degradable part that makes the rubbish resistates is by bio-oxidation, thereby farthest reduced the rubbish gas deliverability behind landfill and the pollution level of water seepage in the future, played the effect of minimizing, stabilization.The present invention can make the rubbish of high-moisture produce heat in bio-oxidation, and can make moisture evaporation.By control, realize functions/drying, thereby improve the calorific value of rubbish rubbish, help further burning disposal.Even to the area of incineration plant is arranged, biological treatment part rubbish can reduce the design scale of expensive incineration plant, is buffered in the rubbish that the incineration plant maintenance period do not handle, thereby makes the expense reduction of regional refuse disposal system.By oxygen content, temperature and humidity in the composting process being changed control comprehensively and optimizing.Can be to ventilation, the temperature controlling of scrap heap, and the variation of the variation of humidity, quantity of refuse made calculate and prediction.Be applicable to the biochemical aerobic treatment of garbage compost and drying garbage.
(4) description of drawings
Fig. 1 is the synoptic diagram of refuse biochemical aerobic treatment device embodiment one;
Fig. 2 is the synoptic diagram of refuse biochemical aerobic treatment device embodiment two;
Fig. 3 is the schematic diagram of the control method of refuse biochemical aerobic treatment device.
Fig. 4 is the schema of the control method one of refuse biochemical aerobic treatment device;
Fig. 5 is the schema of the control method two of refuse biochemical aerobic treatment device.
Among the figure: 1-scrap heap, 2-ventilator trunk, 3-blower fan, 4-temperature measuring set, 5-oxygen measurement, 41-temperature survey instrument probe, 51-measurement of oxygen content instrument probe, 6-controller, 7-stopping valve, 8-differential pressure controller.
(5) specific embodiments
Embodiment one is the refuse biochemical aerobic treatment device of single scrap heap, and as shown in Figure 1, control method is shown in Fig. 2,3,4, and this is the Controlling System of a scrap heap in the typical biochemical aerobic treatment process.At the other blower fan 3 that is provided with of scrap heap, air outlet at blower fan connects ventilator trunk 2, the air outlet of ventilator trunk places in the scrap heap, the probe 51 of oxygen measurement 5 and the probe 41 of temperature measuring set 4 are set in scrap heap, the data input pin of a controller of data input of oxygen measurement and temperature measuring set advances one one in the above-mentioned controller 6 and comprises storer, timing register, central processing unit, input unit, output equipment; Controller calculates the central processing unit of the measured signal via controller of air content measuring apparatus and temperature measuring set, and compares with preset value, determines the open and close of blower fan, and the output blower fan opens and closes signal; The output terminal of controller is connected with the switch of blower fan.
Air content measuring apparatus can adopt oxygen measurement or carbon dioxide measurement.Determination of oxygen content can substitute with the mensuration of carbonic acid gas, because the result of oxygen consumed is the increase of carbonic acid gas in the gas.If the percent by volume (is benchmark with the dry gas) of actual measurement carbonic acid gas is CO in the gas
21, the saturation ratio O1 of oxygen then is expressed as O1=(20-CO in the then above formula
21)/20.
Blower fan 3 can be to scrap heap air-supply, also can be from scrap heap exhausting.According to temperature and oxygen measurement result, by controller, by the method for the above introduction machine that stops, blows in.Be characterized in that each scrap heap is equipped with a blower fan, control flexibly, energy-conservation that avoids that long pipeline brings leaks out or the resistance increase, the blower motor rotating speed need not controlled.
Embodiment two is refuse biochemical aerobic treatment devices of a plurality of scrap heaps, as shown in Figure 2, control method is shown in Fig. 2,3,4, scrap heap is one when above, lead on the ventilator trunk of each scrap heap a stopping valve is arranged, the shared blower fan of a plurality of scrap heaps for simplifying, has only been expressed 3 scrap heap A, B, C among the figure.In scrap heap 1, settle temperature survey instrument probe 41 and measurement of oxygen content instrument probe 51.Measure temperature signal in every heap, oxygen content data flows to controller 6, the switching of controller 6 decision stopping valve 7A, 7B, 7C.Total ventilation of blower fan 3 adopts pressure reduction control by differential pressure controller 8, i.e. the air channel pressure measurement of blower fan both sides, pressure reduction keep constant.Equally, oxygen level can replace with carbon dioxide content.At this moment, controller is a master controller, also can make a plurality of independent controllers, and controller comprises storer, timing register, central processing unit, input unit, output equipment, can select commercially available computer for use.
Fig. 3 adopts oxygen content, thermometric compost control principle figure.
The saturation ratio O1 of oxygen is defined as follows: dry gas contains the oxygen containing percent by volume of dry air in the long-pending percentage ratio/environment of oxysome in the O1=scrap heap.When O1=1, do not carry out biochemical reaction in the scrap heap, do not have oxygen consumption.
T1 and O1 measured value are transferred to controller and carry out data processing.Given or import a cut off value to controller, promptly allow minimum oxygen saturation O1min, span 0.1-0.9 (0.5-0.9 in most cases).When systems measurement value O1＜O1min: controller starts blower fan.
Given or input the other side dividing value promptly allows maximum oxygen saturation ratio O1max, O1max＞O1min to controller.When the O1 measured value reached O1max: controller stopped fan operation.
O1min, O1max can be given in advance, and adjusting also can be in operation.Increase if wish the scrap heap temperature, then suitably turn O1min and O1max value down, reduce, then heighten O1min and O1max value if wish the scrap heap temperature.
Contain saturated steam owing to leave the gas of scrap heap in the composting process in most cases, so the vaporize water deal of unit time scrap heap is the function of temperature T 1 corresponding saturation moisture content and ventilation.
Definition W (T1) is the saturation moisture content of gas under the T1 temperature, and W (T environment) is the saturation moisture content of gas under the envrionment temperature T environment, and unit is g water/Nm3 dry gas.The ventilator flow velocity is that Q (blower fan) unit is Nm3/min, and then the moisture content Q (water) of unit time scrap heap evaporation is:
Q (water)=K
1* Q (blower fan) * [W (T1)-W (T environment)]
K
1For at a concrete system, definite by testing.
Can calculate the evaporated quantity of water of following unit time of differing temps by above formula.
Rubbish mesophytization labile organic compound obtains degraded by bio-oxidation, emits heat simultaneously, and the reduction Q (dried rubbish) and the thermal value Q (heat) of biochemical labile organic compound of unit time are proportional with the oxygen depletion amount.
Q (dried rubbish)=K
2* Q (blower fan) * (1-O1)
K
2Be the constant of determining by test at a concrete system, unit is g/Nm
3
Q (heat)=K
3* Q (blower fan) * (1-O1)
K
3Be the constant of determining by test at a concrete system, unit is KJ/Nm
3
Above relational expression provides the variation in the different parameters unit time.
When known previous moment under the weight of rubbish, the water content situation, according to the evaporated water Q (water), the rubbish reduction Q (rubbish) that calculate, thus measurable, regulate rubbish water ratio at a time.
Raw refuse at first by above-described method according to the Control for Oxygen Content blower fan, is finished the initial temperature rise period of system (general 1-3 days).
Set dry start-up temperature: 30-90 ℃ of Ts span.
Given or the input to controller
Δ t setting-up time section (min)
Δ T1 scrap heap temperature variation (℃), value is less than T (startup)
As system temperature T1 during, start following automatic control process control realization speed maximization greater than T (startup):
Set a variable T1max, controller record temperature this moment is T1max.If this moment, blower fan was in the state that stops, start blower fan automatically, because moisture content constantly evaporates, system temperature T1 can begin to descend after a period of time, and when dropping to T1＜T1max-Δ T1, system stops to ventilate, and oxygen content begins to descend.
When dropping to O1min, system is away from control and move after the time period Δ t, and it is T1max that controller will be measured thermograph, starts blower fan then automatically, repeats above process.Controller is by calculating Q (water), and Q (dried rubbish) can dope the reduction of dried rubbish by the calculating of aforesaid method, the water content of having evaporated, the water content of rubbish this moment.
Referring to Fig. 4, the control method step of refuse biochemical aerobic treatment device:
(1), start blower fan, controller picks up counting;
(2), predefined O1min, O1max, rubbish total amount, rubbish water content data and sequence of control are deposited in the storer of controller;
(3), read the real side value O1 of air content measuring apparatus, the measured value T1 of temperature measuring set;
(4), if O1＜O1min then starts blower fan or opens Ventilating valve; If O1 〉=O1max then stops blower fan or closes Ventilating valve.
(5), if O1min＜O1＜O1max, there is no extraneous command for stopping, the instruction of extraneous change input value is arranged, then return (1) step;
(6), if O1min＜O1＜O1max, there is no extraneous command for stopping, does not have extraneous change input value yet and instructs, then return (3) step;
(7), if O1min＜O1＜O1max, extraneous command for stopping is arranged, then stop blower fan or close Ventilating valve.
Referring to Fig. 5, its rubbish biological drying control method can have following steps:
(a), start blower fan, controller picks up counting;
(b), predefined T1min, T1max, rubbish total amount, rubbish water content, start-up temperature Ts, scrap heap temperature variation Δ T1, time period Δ t data and sequence of control are deposited in the storer of controller;
(c), read the measured value T1 of temperature measuring set;
(d), if T1＞Ts not, then returns step (c);
(e), if T1=T1max then starts blower fan or opens Ventilating valve;
(f), read the real side value O1 of air content measuring apparatus, the measured value T1 of temperature measuring set;
(g), if T1＜T1max-Δ T1 not, then returns step (f);
(h), if T1＜T1max-Δ T1 is then to stop blower fan or close Ventilating valve;
(i), if no extraneous command for stopping, have extraneous change input value to instruct, then return step (a);
(j), if no extraneous command for stopping, does not have the extraneous input value of changing yet and instructs, then return step (c);
(k), if extraneous command for stopping is arranged, then stop blower fan or close Ventilating valve.
Claims (10)
1. refuse biochemical aerobic treatment device is characterized in that:
(1), at the other blower fan that is provided with of scrap heap, connect ventilator trunk at the air outlet of blower fan, the air outlet of ventilator trunk places in the scrap heap;
(2), air content measuring apparatus and temperature measuring set, controller of measurement result input of air content measuring apparatus and temperature measuring set are set in scrap heap;
(3), advance one one in the above-mentioned controller and comprise storer, timing register, central processing unit, input unit, output equipment;
(4), above-mentioned controller calculates the measured signal of air content measuring apparatus and temperature measuring set through central processing unit, and compare with preset value, determine the open and close of blower fan, and the output blower fan opens and closes signal;
(5), the output terminal of above-mentioned controller is connected with the switch of blower fan.
2. refuse biochemical aerobic treatment device according to claim 1 is characterized in that: the above-mentioned gas content measuring instrument is oxygen measurement or carbon dioxide measurement.
3. refuse biochemical aerobic treatment device according to claim 1 and 2 is characterized in that: above-mentioned scrap heap is one and a blower fan or a shared blower fan is set when above respectively that leading on the ventilator trunk of each scrap heap has a stopping valve.
4. refuse biochemical aerobic treatment device according to claim 3 is characterized in that: above-mentioned blower fan is one when above, and a controller or a shared controller are set respectively.
5. refuse biochemical aerobic treatment device according to claim 4 is characterized in that: above-mentioned blower fan is connected with differential pressure controller.
6. according to the control method of the refuse biochemical aerobic treatment device of claim 1 or 5, it is characterized in that following steps are arranged:
Step (1), startup blower fan, controller picks up counting;
Step (2), maximum oxygen saturation ratio O1max, minimum oxygen saturation O1min, rubbish total amount, rubbish water content data and sequence of control are deposited in the storer of controller, the choosing value scope of O1min is 0.1-0.9;
Step (3), read the measured value T1 of the real side value of air content measuring apparatus oxygen saturation O1, temperature measuring set;
Step (4), if O1＜O1min, then start blower fan or open Ventilating valve; If O1 〉=O1max then stops blower fan or closes Ventilating valve.
7. according to the control method of the refuse biochemical aerobic treatment device of claim 6, it is characterized in that: also have following steps in step (4) back:
Step (5), if O1min＜O1＜O1max, there is no extraneous command for stopping, the instruction of extraneous change input value is arranged, then return step (1);
Step (6), if O1min＜O1＜O1max, there is no extraneous command for stopping, does not have extraneous change input value yet and instructs, then return step (3);
Step (7), if O1min＜O1＜O1max, extraneous command for stopping is arranged, then stop blower fan or close Ventilating valve.
8. according to the control method of the refuse biochemical aerobic treatment device of claim 1 or 5, it is characterized in that following steps are arranged:
Step (a), startup blower fan, controller picks up counting;
Step (b), minimum design temperature T1min, maximum design temperature T1max, rubbish total amount, rubbish water content, start-up temperature Ts, scrap heap temperature variation Δ T1, time period Δ t data and sequence of control are deposited in the storer of controller;
Step (c), read the temperature measured value T1 of temperature measuring set;
Step (d), if T1＞Ts not, does not then return step (c);
Step (e), if T1=T1max, then start blower fan or open Ventilating valve;
Step (f), the real side value O1 that reads air content measuring apparatus, the measured value T1 of temperature measuring set;
Step (g), if T1＜T1max-Δ T1 not, does not then return step (f);
Step (h), if T1＜T1max-Δ T1 be then to stop blower fan or close Ventilating valve.
9. the control method of refuse biochemical aerobic treatment device according to Claim 8 is characterized in that: also have following steps in step (h) back:
Step (i), if no extraneous command for stopping, have extraneous change input value to instruct, then return step (a);
Step (j), if no extraneous command for stopping, does not have the extraneous input value of changing yet and instructs, then return step (c);
Step (k), if extraneous command for stopping is arranged, then stop blower fan or close Ventilating valve.
10. according to the control method of the refuse biochemical aerobic treatment device of claim 6 or 8, it is characterized in that: the span of above-mentioned start-up temperature Ts is 30-90 ℃.
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| CNB2005102003274A CN100340530C (en) | 2005-06-14 | 2005-06-14 | Refuse biochemical aerobic treatment device and its control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005102003274A CN100340530C (en) | 2005-06-14 | 2005-06-14 | Refuse biochemical aerobic treatment device and its control method |
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| CN100340530C CN100340530C (en) | 2007-10-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101481271B (en) * | 2009-02-09 | 2012-07-25 | 万若（北京）环境工程技术有限公司 | Oxygen temperature on-line detected and controlled composting method |
| CN101475413B (en) * | 2009-01-22 | 2012-09-05 | 成都禾力宝生物肥料有限责任公司 | Multipath compost ventilating system, ventilating method and use |
| CN103265344A (en) * | 2013-06-13 | 2013-08-28 | 宁夏祥河生态环境工程研究院有限公司 | Device for fermenting organic fertilizer without turning |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1054413A (en) * | 1990-03-01 | 1991-09-11 | 比勒股份公司 | Composting arrangement and compost method |
| CN1184171C (en) * | 2001-07-18 | 2005-01-12 | 陈同斌 | Autocontroller for compost |
| CN1294106C (en) * | 2004-02-04 | 2007-01-10 | 同济大学 | High-temperature composting process for waste by the forced combination with natural ventilation |
-
2005
- 2005-06-14 CN CNB2005102003274A patent/CN100340530C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101475413B (en) * | 2009-01-22 | 2012-09-05 | 成都禾力宝生物肥料有限责任公司 | Multipath compost ventilating system, ventilating method and use |
| CN101481271B (en) * | 2009-02-09 | 2012-07-25 | 万若（北京）环境工程技术有限公司 | Oxygen temperature on-line detected and controlled composting method |
| CN103265344A (en) * | 2013-06-13 | 2013-08-28 | 宁夏祥河生态环境工程研究院有限公司 | Device for fermenting organic fertilizer without turning |
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| CN100340530C (en) | 2007-10-03 |
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