CA2153683A1 - Microbiological method for the decomposition of organic wastes - Google Patents
Microbiological method for the decomposition of organic wastesInfo
- Publication number
- CA2153683A1 CA2153683A1 CA 2153683 CA2153683A CA2153683A1 CA 2153683 A1 CA2153683 A1 CA 2153683A1 CA 2153683 CA2153683 CA 2153683 CA 2153683 A CA2153683 A CA 2153683A CA 2153683 A1 CA2153683 A1 CA 2153683A1
- Authority
- CA
- Canada
- Prior art keywords
- air
- aeration
- waste
- wird
- waste material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/70—Controlling the treatment in response to process parameters
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/964—Constructional parts, e.g. floors, covers or doors
- C05F17/971—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material
- C05F17/979—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material the other material being gaseous
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/145—Feedstock the feedstock being materials of biological origin
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biochemistry (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biotechnology (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Micro-Organisms Or Cultivation Processes Thereof (AREA)
- Fertilizers (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Medicines Containing Plant Substances (AREA)
Abstract
The invention concerns a microbiological method for the decompo-sition of organic wastes, the waste material being subjected to a compost-ing process under aerobic conditions in a closed container to which air is supplied. Air is passed through the waste material at intervals, the spent air being drawn off together with the gaseous decomposition products.
The length of the intervals between the air feed periods is controlled as a function of the lowest value of the O2 concentration measured in the spent air. The spent air which collects in the space above the composting material is preferably drawn off at the same time as air is supplied, or shortly afterwards, the O2 concentration being measured at this time. Al-ternatively, the O2 concentration in the space between the heap of waste and the container end wall or the O2 concentration of the gas in the heap of waste can be monitored.
(5n7 r e Bei einem Verfahren zurn ~ . Abh~u von organ~
cheD Abfallen wird das w t ' '~' ' Material in einen g~ <s v ~
Behalter unber 1- ' ' ' bei aeroben B~ v einem ROLt~ .V ~ B
, - O Dabei wird Luft d ' - ' ' und stoBweise durch das Ahfnl` ' geieibet, und die mit den g,~ ----;g~ Abb~a~
: . ' ' Abluft wird abgef~ Die Dauer d ~ die zwis-cheD den 1~ ' liegeL wird Dach MaBgabe des n-~ ' u Weltes des O~Gebalbes gesbeuert, der in da Abluft f~stv~t~,llt wir~L
VOIL40~ ' wird die sich in dam Rllum ~ber dam ~ sam-melnde Abluft gl. 1~ ;g mit d T ' ' ' oder ~urz dsDach abge-saugt~ wobei die Mcsslmg des 02 Gehaltes .1 . hg '~' L wird. Albet~ativ dazu ~nD d O~Gehalt des Raumes zwischen dem ~h- ll' ' und der Brl~ . d oder auch der O~Gehalt des in dern Abfallhaufen t ' " ' Gases, ' _~ht werdeD.
The length of the intervals between the air feed periods is controlled as a function of the lowest value of the O2 concentration measured in the spent air. The spent air which collects in the space above the composting material is preferably drawn off at the same time as air is supplied, or shortly afterwards, the O2 concentration being measured at this time. Al-ternatively, the O2 concentration in the space between the heap of waste and the container end wall or the O2 concentration of the gas in the heap of waste can be monitored.
(5n7 r e Bei einem Verfahren zurn ~ . Abh~u von organ~
cheD Abfallen wird das w t ' '~' ' Material in einen g~ <s v ~
Behalter unber 1- ' ' ' bei aeroben B~ v einem ROLt~ .V ~ B
, - O Dabei wird Luft d ' - ' ' und stoBweise durch das Ahfnl` ' geieibet, und die mit den g,~ ----;g~ Abb~a~
: . ' ' Abluft wird abgef~ Die Dauer d ~ die zwis-cheD den 1~ ' liegeL wird Dach MaBgabe des n-~ ' u Weltes des O~Gebalbes gesbeuert, der in da Abluft f~stv~t~,llt wir~L
VOIL40~ ' wird die sich in dam Rllum ~ber dam ~ sam-melnde Abluft gl. 1~ ;g mit d T ' ' ' oder ~urz dsDach abge-saugt~ wobei die Mcsslmg des 02 Gehaltes .1 . hg '~' L wird. Albet~ativ dazu ~nD d O~Gehalt des Raumes zwischen dem ~h- ll' ' und der Brl~ . d oder auch der O~Gehalt des in dern Abfallhaufen t ' " ' Gases, ' _~ht werdeD.
Description
2ls3683 Method for the microbiological decomposition of organic waste Description:
The invention relates to a method for the microbiological decomposition of organic waste according to 5 the preamble of claim 1. From DE AS 15 92 729 a method is known in which waste is subjected to a composting process in a closed container under aerobic conditions, air being passed through the waste material discontinuously and in bursts, and the duration of the rest times between the aeration periods being so controlled that the temperatures in the compost material are held below 75C.
Although it exhibited very good composting results, this discontinuous method is being displaced by methods in which the composting material is continuously aerated. The continuous aeration methods have, however, the disadvantage that the air blown in seeks the path of least resistance through the waste heap so that the aeration of the waste in the heap does not take place uniformly and compaction zones form in which, possibly, the oxygen content falls so low that the conditions for an aerobic composting process are no longer afforded and anaerobic processes can occur.
Further, the methods which work with continuous air supply have the disadvantage that the temperature distribution within the composting waste materials is uneven, because the supplied fresh air cools the lower layers so that the temperature is higher in the upper layers. Similarly, with continuous aeration, humidity is drawn upwards out of the lower layers, so that the lower layers easily dry out and the composting process there is interrupted. The continuously working methods have thus overall the disadvantage that the composting process develops unevenly in the various regions of the waste heap. If the entire waste material is to achieve a particular degree of 2ls~683 composting, the waste heap must be left in the composting container longer than would be necessary with a composting process which is everywhere even.
On the other hand, the discontinuously working, Blaubeuer's aeration method has the disadvantage that the aeration is controlled in accordance with the temperature of the composting material, so that the composting conditions cannot be optimally set.
The object of the invention is thus to so modify the method indicated in the introduction, working with discontinuous aeration, that effective control of the composting process is possible.
This object is achieved in accordance with the invention with a method according to claim 1.
Advantageous embodiments of the invention are apparent from the subclaims.
The invention will now be described and explained in more detail with reference to the drawing.
The arrangement employed for the composting is schematically represented in Fig. 1. It consists of a container 1, which is provided with a suitable aeration floor, for example a perforated floor or grid mesh 3.
Preferably, the aeration floor consists of longitudinal or angled profiles arranged one next to another in the longitudinal direction with small spacing, or alternatively of round rods. With a perforated floor or a grid mesh, the composting material can be caught in the holes and block them, so that each hole must be individually cleared. With the aeration floor constructed with longitudinal profiles or rods there is, in contrast, always a possibility, using a suitable pusher, to push away the composting material 2ls~68~
from the aeration floor in the longitudinal direction at the end of the composting process, at the same time scraping out material which is caught in the gaps between the longitudinal profiles.
The waste material is heaped on this aeration floor 10 through the opened cover 4. For evenly distributing the waste material in the container 1, a broaching blade 6 may be arranged inside the container 1. This broaching blade 6 is movable in the vertical direction on two rails 7, 8. The raising of the broaching blade 6 is effected with the aid of lifting spindles 11, 12. Beneath the perforated floor 3 there is an aeration box 2 into which air can be forced with the aid of a blower 15. The air forced in then flows through the holes of the perforated floor into the waste material 10. There is arranged in the exhaust air channel 9, which is located at the upper side of the container 1, a sensor 13 with which the oxygen concentration in the exhaust air can be determined. A second sensor may also provided with which, for example, the CO2 content can be determined. Within the container 1, temperature sensors 16 are provided with which the temperature of the waste material at various heights above the perforated floor is measured.
The output signal of the oxygen sensor 13 and the signals of the temperature sensors 16 are supplied to a control 14 which in correspondence with the measured value of the oxygen content and possibly also corresponding to the measured value of the temperature, controls the rest times between the aeration periods. The control 14 directly affects the blower 15 and switches it on or off.
The exhaust air flows through a water separator 18 and then enters a biological filter 19. The biological filter 19 likewise has a perforated floor 21 over which the biologically active material 20 is deposited. The exhaust 21~3r6`83 air flows through this material 20 before it reaches the outlet-22 to the atmosphere.
5The method according to the invention proceeds as follows:
After filling with the waste material, which may be treated with an inoculation substrate, for example an already composted organic material, the container is closed and the composting process begun. After the composting process has commenced, which can be determined by measuring the temperature within the waste heap, air is forced in with the aid of the blower so that the compost material is aerated from below. This aeration occurs in bursts; within a time range of approximately 1 to 5 minutes a quantity of air is forced in which approximately corresponds to the volume of the container. Simultaneously with the forcing in of the air, or a few seconds later, the exhaust air above the waste heap is drawn off with a blower. Over the duration of the air supply the oxygen content in the drawn off exhaust air is monitored. In the composting process there is only slight gas exchange between the reaction gas such as CO2, formed in the waste material and the space above the waste material. For this reason, during the aeration periods, a relatively high oxygen content of for example 20~ is initially measured in the exhaust air. When the air supplied in bursts has passed through the waste heap and there carried along the organic reaction gases, the oxygen content in the exhaust air sinks to a value which may be between 16 and 19~. When the gaseous decomposition products are flushed out, the oxygen content increases again until the oxygen content of fresh air is attained. The more oxygen is consumed by the microbiological decomposition process in the waste heap during the intervals between aeration the lower the oxygen content of the exhaust air determined during the aeration 2l53683 period falls. The lowest oxygen content in the exhaust air determined during the aeration period is thus a measure of the activity of the composting process and can thus be employed for the control of the composting process. The desired value for the oxygen content in the exhaust air is around 17 to 18~. If the oxygen content sinks below this value, the interval between the aeration periods is shortened. If, for example, the aeration is carried out in each case for 3 minutes with an interval of 20 minutes and after a certain time the composting process in the waste material has so accelerated that more oxygen is consumed and as a result the measured oxygen content in the exhaust air sinks below the value of 17~, the aeration is no longer carried out every 20 minutes but for example every 10 minutes or, if the oxygen content approaches the lower limit of 16~, every 5 minutes. Conversely, if the oxygen content in the exhaust air falls less strongly, the space of time between the individual aeration periods is increased. With advancing decomposition of the organic material the oxygen consumption of the microorganisms becomes ever smaller, so that the intervals between aeration periods become ever longer. When they reach around one hour, this indicates that the composting process is complete and the process can be terminated, the composted material removed and replaced by new waste material.
With an alternative form of the method in accordance with the invention, the oxygen content in the space between the heaped waste material and the container wall is measured with a sensor 24. Between this cushion of air and the quantity of gas within the waste heap a certain level of gas exchange takes place due to convection and diffusion, so that a part of the oxygen in this air cushion enters the heap and is there consumed by the composting process. As a result, the oxygen content in the space between the waste heap and the container wall sinks in the rest periods between the aeration periods. The more active 2153~83 the stage of the rotting process the more rapidly the 2 content sinks and the more often must the supply of air be effected.
Finally, the oxygen content of the gas within the waste heap can also be measured. Since the decomposition process in the waste material can have strong local variations several probes (25, 26) must be provided in various positions of the waste heap and averages formed from their data.
The invention relates to a method for the microbiological decomposition of organic waste according to 5 the preamble of claim 1. From DE AS 15 92 729 a method is known in which waste is subjected to a composting process in a closed container under aerobic conditions, air being passed through the waste material discontinuously and in bursts, and the duration of the rest times between the aeration periods being so controlled that the temperatures in the compost material are held below 75C.
Although it exhibited very good composting results, this discontinuous method is being displaced by methods in which the composting material is continuously aerated. The continuous aeration methods have, however, the disadvantage that the air blown in seeks the path of least resistance through the waste heap so that the aeration of the waste in the heap does not take place uniformly and compaction zones form in which, possibly, the oxygen content falls so low that the conditions for an aerobic composting process are no longer afforded and anaerobic processes can occur.
Further, the methods which work with continuous air supply have the disadvantage that the temperature distribution within the composting waste materials is uneven, because the supplied fresh air cools the lower layers so that the temperature is higher in the upper layers. Similarly, with continuous aeration, humidity is drawn upwards out of the lower layers, so that the lower layers easily dry out and the composting process there is interrupted. The continuously working methods have thus overall the disadvantage that the composting process develops unevenly in the various regions of the waste heap. If the entire waste material is to achieve a particular degree of 2ls~683 composting, the waste heap must be left in the composting container longer than would be necessary with a composting process which is everywhere even.
On the other hand, the discontinuously working, Blaubeuer's aeration method has the disadvantage that the aeration is controlled in accordance with the temperature of the composting material, so that the composting conditions cannot be optimally set.
The object of the invention is thus to so modify the method indicated in the introduction, working with discontinuous aeration, that effective control of the composting process is possible.
This object is achieved in accordance with the invention with a method according to claim 1.
Advantageous embodiments of the invention are apparent from the subclaims.
The invention will now be described and explained in more detail with reference to the drawing.
The arrangement employed for the composting is schematically represented in Fig. 1. It consists of a container 1, which is provided with a suitable aeration floor, for example a perforated floor or grid mesh 3.
Preferably, the aeration floor consists of longitudinal or angled profiles arranged one next to another in the longitudinal direction with small spacing, or alternatively of round rods. With a perforated floor or a grid mesh, the composting material can be caught in the holes and block them, so that each hole must be individually cleared. With the aeration floor constructed with longitudinal profiles or rods there is, in contrast, always a possibility, using a suitable pusher, to push away the composting material 2ls~68~
from the aeration floor in the longitudinal direction at the end of the composting process, at the same time scraping out material which is caught in the gaps between the longitudinal profiles.
The waste material is heaped on this aeration floor 10 through the opened cover 4. For evenly distributing the waste material in the container 1, a broaching blade 6 may be arranged inside the container 1. This broaching blade 6 is movable in the vertical direction on two rails 7, 8. The raising of the broaching blade 6 is effected with the aid of lifting spindles 11, 12. Beneath the perforated floor 3 there is an aeration box 2 into which air can be forced with the aid of a blower 15. The air forced in then flows through the holes of the perforated floor into the waste material 10. There is arranged in the exhaust air channel 9, which is located at the upper side of the container 1, a sensor 13 with which the oxygen concentration in the exhaust air can be determined. A second sensor may also provided with which, for example, the CO2 content can be determined. Within the container 1, temperature sensors 16 are provided with which the temperature of the waste material at various heights above the perforated floor is measured.
The output signal of the oxygen sensor 13 and the signals of the temperature sensors 16 are supplied to a control 14 which in correspondence with the measured value of the oxygen content and possibly also corresponding to the measured value of the temperature, controls the rest times between the aeration periods. The control 14 directly affects the blower 15 and switches it on or off.
The exhaust air flows through a water separator 18 and then enters a biological filter 19. The biological filter 19 likewise has a perforated floor 21 over which the biologically active material 20 is deposited. The exhaust 21~3r6`83 air flows through this material 20 before it reaches the outlet-22 to the atmosphere.
5The method according to the invention proceeds as follows:
After filling with the waste material, which may be treated with an inoculation substrate, for example an already composted organic material, the container is closed and the composting process begun. After the composting process has commenced, which can be determined by measuring the temperature within the waste heap, air is forced in with the aid of the blower so that the compost material is aerated from below. This aeration occurs in bursts; within a time range of approximately 1 to 5 minutes a quantity of air is forced in which approximately corresponds to the volume of the container. Simultaneously with the forcing in of the air, or a few seconds later, the exhaust air above the waste heap is drawn off with a blower. Over the duration of the air supply the oxygen content in the drawn off exhaust air is monitored. In the composting process there is only slight gas exchange between the reaction gas such as CO2, formed in the waste material and the space above the waste material. For this reason, during the aeration periods, a relatively high oxygen content of for example 20~ is initially measured in the exhaust air. When the air supplied in bursts has passed through the waste heap and there carried along the organic reaction gases, the oxygen content in the exhaust air sinks to a value which may be between 16 and 19~. When the gaseous decomposition products are flushed out, the oxygen content increases again until the oxygen content of fresh air is attained. The more oxygen is consumed by the microbiological decomposition process in the waste heap during the intervals between aeration the lower the oxygen content of the exhaust air determined during the aeration 2l53683 period falls. The lowest oxygen content in the exhaust air determined during the aeration period is thus a measure of the activity of the composting process and can thus be employed for the control of the composting process. The desired value for the oxygen content in the exhaust air is around 17 to 18~. If the oxygen content sinks below this value, the interval between the aeration periods is shortened. If, for example, the aeration is carried out in each case for 3 minutes with an interval of 20 minutes and after a certain time the composting process in the waste material has so accelerated that more oxygen is consumed and as a result the measured oxygen content in the exhaust air sinks below the value of 17~, the aeration is no longer carried out every 20 minutes but for example every 10 minutes or, if the oxygen content approaches the lower limit of 16~, every 5 minutes. Conversely, if the oxygen content in the exhaust air falls less strongly, the space of time between the individual aeration periods is increased. With advancing decomposition of the organic material the oxygen consumption of the microorganisms becomes ever smaller, so that the intervals between aeration periods become ever longer. When they reach around one hour, this indicates that the composting process is complete and the process can be terminated, the composted material removed and replaced by new waste material.
With an alternative form of the method in accordance with the invention, the oxygen content in the space between the heaped waste material and the container wall is measured with a sensor 24. Between this cushion of air and the quantity of gas within the waste heap a certain level of gas exchange takes place due to convection and diffusion, so that a part of the oxygen in this air cushion enters the heap and is there consumed by the composting process. As a result, the oxygen content in the space between the waste heap and the container wall sinks in the rest periods between the aeration periods. The more active 2153~83 the stage of the rotting process the more rapidly the 2 content sinks and the more often must the supply of air be effected.
Finally, the oxygen content of the gas within the waste heap can also be measured. Since the decomposition process in the waste material can have strong local variations several probes (25, 26) must be provided in various positions of the waste heap and averages formed from their data.
Claims (7)
1. Method for the microbiological decomposition of organic waste which is sub]ected to a composting process in a closed container under aerobic conditions with the supply of air, air being passed through the waste material discontinuously and in bursts from below and the exhaust air mixed with the gaseous decomposition products being drawn off, characterized in that, simultaneously with the supply of air, or short time thereafter, the exhaust air is drawn off from the space above the waste material in that, the duration of the rest periods between the aeration periods is controlled in accordance with the lowest value of the O2 content in the exhaust air and/or the greatest value of the CO2 content in the exhaust air such that the O2 content in the exhaust air does not fall below 16% by volume.
2. Method according to claim 1, characterized in that, during the rest periods, the temporal development of the oxygen content in the space between the heap of waste material and the container wall is measured.
3. Method according to any of claims 1 or 2, characterized in that, the duration of the aeration periods is between 1 and 5 minutes.
4. Method according to any of claims 1 to 3, characterized in that, the quantity of air supplied during one aeration period corresponds approximately to the volume to the container.
5. Method according to any of claims 1 to 4, characterized in that, the temperature in the composting waste material is held to below 75°C.
6. Method according to any of claims 1 to 5, characterized in that, the discharged or drawn-off air is passed through an active filter.
7. Device for the biological decomposition of organic waste which is subjected to a composting process in a closed container under aerobic conditions with the supply of air, having a container (1) which is provided with an aeration floor (3), characterized in that, the aeration floor (3) consists of longitudinal profiles or rods (23) arranged one next to another with slight spacing.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4301116A DE4301116A1 (en) | 1993-01-18 | 1993-01-18 | Process for microbiological degradation of organic waste |
| DEP4301116.0 | 1993-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2153683A1 true CA2153683A1 (en) | 1994-07-21 |
Family
ID=6478373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2153683 Abandoned CA2153683A1 (en) | 1993-01-18 | 1994-01-17 | Microbiological method for the decomposition of organic wastes |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP0679148B1 (en) |
| JP (1) | JPH08508705A (en) |
| KR (1) | KR100279197B1 (en) |
| AT (1) | ATE196455T1 (en) |
| AU (1) | AU685771B2 (en) |
| BR (1) | BR9400116A (en) |
| CA (1) | CA2153683A1 (en) |
| CZ (1) | CZ288987B6 (en) |
| DE (2) | DE4301116A1 (en) |
| DK (1) | DK0679148T3 (en) |
| ES (1) | ES2150485T3 (en) |
| GR (1) | GR3035049T3 (en) |
| HU (1) | HU217225B (en) |
| PL (1) | PL174546B1 (en) |
| WO (1) | WO1994015893A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014107791A1 (en) * | 2013-01-14 | 2014-07-17 | 1867239 Ontario Corp. | Method of aerobic treatment of poultry manure and apparatus for producing organic fertilizer |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2286825B (en) * | 1994-02-15 | 1998-02-11 | Matsushita Electric Works Ltd | Garbage treating apparatus |
| DE19513701A1 (en) * | 1995-04-11 | 1996-10-17 | Fresenius Umwelttechnik Gmbh | Process for composting organic waste and / or sewage sludge and device for carrying out this process |
| ES2106679B1 (en) * | 1995-08-01 | 1998-06-01 | Junta De Residus | CLOSED COMPOSTING SYSTEM. |
| DE19752991C1 (en) * | 1997-11-28 | 1999-03-04 | Metallgesellschaft Ag | Process to regulate the supply of air to the under face of compost heap |
| CN1203029C (en) * | 1998-11-06 | 2005-05-25 | 帕特里克·缪勒 | Method and device for preparing a mixture of substances containing organic components |
| DE19909353A1 (en) * | 1998-11-06 | 2000-05-11 | Patrick Mueller | Method and device for the preparation of a mixture of substances containing organic matter |
| ES2259860B1 (en) * | 2003-11-25 | 2007-06-16 | Emp. Mun. De Aguas Y Saneamiento De Murcia, S.A. | PLANT FOR MUD COMPOSTATION. |
| JP7461059B2 (en) * | 2021-11-18 | 2024-04-03 | 株式会社晃伸製機 | Air Supply System |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1592729B1 (en) * | 1967-02-22 | 1971-07-15 | Heidelberg Portland Zement | Process for the disinfection and ripening of compost straw |
| US4347741A (en) * | 1980-07-17 | 1982-09-07 | Endress & Hauser, Inc. | Control system for a capacitive level sensor |
| DE3827288C2 (en) * | 1988-08-11 | 1995-05-24 | Von Ludowig Gmbh | Method and arrangement for carrying out the method for microbiological degradation of organic waste |
| DE4005534C1 (en) * | 1990-02-19 | 1991-04-18 | Mannesmann Ag, 4000 Duesseldorf, De | |
| DE4102210A1 (en) * | 1991-01-25 | 1992-07-30 | Licencia Holding Sa | METHOD AND DEVICE FOR COMPOSTING ORGANIC WASTE OR CLEANING SLUDGE |
-
1993
- 1993-01-18 DE DE4301116A patent/DE4301116A1/en not_active Withdrawn
-
1994
- 1994-01-17 DE DE59409533T patent/DE59409533D1/en not_active Expired - Fee Related
- 1994-01-17 DK DK94905070T patent/DK0679148T3/en active
- 1994-01-17 JP JP51569994A patent/JPH08508705A/en not_active Ceased
- 1994-01-17 BR BR9400116A patent/BR9400116A/en not_active IP Right Cessation
- 1994-01-17 ES ES94905070T patent/ES2150485T3/en not_active Expired - Lifetime
- 1994-01-17 EP EP19940905070 patent/EP0679148B1/en not_active Expired - Lifetime
- 1994-01-17 CA CA 2153683 patent/CA2153683A1/en not_active Abandoned
- 1994-01-17 PL PL94309917A patent/PL174546B1/en not_active IP Right Cessation
- 1994-01-17 HU HU9502148A patent/HU217225B/en not_active IP Right Cessation
- 1994-01-17 WO PCT/EP1994/000106 patent/WO1994015893A1/en active IP Right Grant
- 1994-01-17 CZ CZ19951864A patent/CZ288987B6/en unknown
- 1994-01-17 AU AU58839/94A patent/AU685771B2/en not_active Ceased
- 1994-01-17 KR KR1019950702940A patent/KR100279197B1/en not_active IP Right Cessation
- 1994-01-17 AT AT94905070T patent/ATE196455T1/en not_active IP Right Cessation
-
2000
- 2000-12-12 GR GR20000402736T patent/GR3035049T3/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014107791A1 (en) * | 2013-01-14 | 2014-07-17 | 1867239 Ontario Corp. | Method of aerobic treatment of poultry manure and apparatus for producing organic fertilizer |
Also Published As
| Publication number | Publication date |
|---|---|
| CZ288987B6 (en) | 2001-10-17 |
| WO1994015893A1 (en) | 1994-07-21 |
| KR100279197B1 (en) | 2001-01-15 |
| DK0679148T3 (en) | 2000-10-16 |
| HU217225B (en) | 1999-12-28 |
| JPH08508705A (en) | 1996-09-17 |
| CZ186495A3 (en) | 1996-01-17 |
| DE4301116A1 (en) | 1994-07-21 |
| KR960700203A (en) | 1996-01-19 |
| ES2150485T3 (en) | 2000-12-01 |
| PL309917A1 (en) | 1995-11-13 |
| EP0679148B1 (en) | 2000-09-20 |
| AU685771B2 (en) | 1998-01-29 |
| DE59409533D1 (en) | 2000-10-26 |
| BR9400116A (en) | 1994-08-09 |
| HUT76163A (en) | 1997-07-28 |
| EP0679148A1 (en) | 1995-11-02 |
| AU5883994A (en) | 1994-08-15 |
| GR3035049T3 (en) | 2001-03-30 |
| HU9502148D0 (en) | 1995-09-28 |
| PL174546B1 (en) | 1998-08-31 |
| ATE196455T1 (en) | 2000-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |