CA2080547A1 - Device and method for mixing peat and sludge - Google Patents
Device and method for mixing peat and sludgeInfo
- Publication number
- CA2080547A1 CA2080547A1 CA002080547A CA2080547A CA2080547A1 CA 2080547 A1 CA2080547 A1 CA 2080547A1 CA 002080547 A CA002080547 A CA 002080547A CA 2080547 A CA2080547 A CA 2080547A CA 2080547 A1 CA2080547 A1 CA 2080547A1
- Authority
- CA
- Canada
- Prior art keywords
- mixer
- sludge
- peat
- accordance
- screw conveyor
- 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
- 239000010802 sludge Substances 0.000 title claims abstract description 34
- 239000003415 peat Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims 1
- 210000003608 fece Anatomy 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000010871 livestock manure Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000008240 homogeneous mixture Substances 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/711—Feed mechanisms for feeding a mixture of components, i.e. solids in liquid, solids in a gas stream
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01C—PLANTING; SOWING; FERTILISING
- A01C3/00—Treating manure; Manuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/60—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis
- B01F27/72—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a horizontal or inclined axis with helices or sections of helices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/717—Feed mechanisms characterised by the means for feeding the components to the mixer
- B01F35/7179—Feed mechanisms characterised by the means for feeding the components to the mixer using sprayers, nozzles or jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/75—Discharge mechanisms
- B01F35/754—Discharge mechanisms characterised by the means for discharging the components from the mixer
- B01F35/7547—Discharge mechanisms characterised by the means for discharging the components from the mixer using valves, gates, orifices or openings
- B01F35/75471—Discharge mechanisms characterised by the means for discharging the components from the mixer using valves, gates, orifices or openings being adjustable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/81—Forming mixtures with changing ratios or gradients
-
- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F7/00—Fertilisers from waste water, sewage sludge, sea slime, ooze or similar masses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
Abstract
(57)Abstract A method and mixer for mixing peat and sludge into a homogenous mass, in which method the peat and sludge is mixed by pressurizing the pre-mixed mass for some time, when the sludge is absorbed by and bound in the peat. The mixer in accordance with the invention includes a silo (1) and a screw conveyor (4) located beneath it, from which the mass is squeezed out through a nozzle (10).
Description
2~80~7 A ~ethod ~nd ~ Mixer ~or ~ixing peat and sludge The object of the invention is a method for mixing peat and sludge as a homogenous mass, in which the peat and sludge are mixed mechanically. The invention is also concerned with a device for realizing the method. Here peat also means any other substance, by means of which it is desired to bind the sludge, that has a great surface tension. Here sludge also means liquid manure.
Various kinds of sludges form a waste problem, because they cannot be put directly into the natural environment. In nature the eludges threaten surface and ground waters. Sludges can cause smell, taste, hygienic and eutrophy problems in the environment. The most usual sludges are waste water and septic tank sludges, as well as the liquid manure produced in agriculture.
Attempts have been made to mix sludge with various kinds of dry masses, especially with peat. A homogenous mixture of peat and sludge has shown itself to be very advantageous on account of the fact that the sludge liquids and nutrients bind themselves to peat very effectively. In practice, however, the mixing of peat and especially liquid manure has been very difficult.
The~e do not mix naturally, the peat tending, even after mechanical treatment, to rise to the surface, nor does it, due to its great surface tension, suck the sludge into itself. Up until now mixing has taken place for example in such a way that the peat and liquid manure have been spread in layers as a mattress about 50 cm thick in a shallow pond. After this a tractor i8 driven several times on top of the mixture, when the final mixing and the sucking of the liguid manure into the cell structure of the peat has taken place. In practice this kind of method is laborious and slow, as well as expensive.
The purpose of the invention is to find a new mixing and a mixer, by means of which peat and sludge can be mixed as a homogenous mass as a continual process. The characteristic features of the method in accordance with the invention are presented in the accompanying Patent Claim 1 and the -- 20~0347 characteristic features of a corresponding mixer are presented in Patent Claim 3. The invention is based to a great extent on the realization that mixing takes place by raising the pressure of the mass to be mixed for a sufficiently long time, when the counter force caused by surface tension is overcome.
Patent Claim 4 presents an especially advantageous mixer solution, which to some extent overcomes even an uneven feed of peat and sludge.
In what follows the invention is illustrated with the aid of the accompanying illustrations, which show various mixers in accordance with invention.
5 Figure 1 shows a mixer seen from the side in partial cross-section Figure 2 shows a mixer seen from above, in cross-section at point II-II in Figure 1 Figure 3 shows a cross-section of Figure 1 at point III-III
Figure 4 shows another kind of mixer Figure 5 shows the mixer in Figure 4 seen from the side The principal component~ of the mixer in Figure 1 are the ~ilo 1 and the double screw 4 at the foot of it, continuations ofthe screws 5 being located in pipe 12. The pipe feeding sludge is joined to connection 15 and the sludge is sprayed longitudinally on top of screws 5 by means of a nozzle 2. Peat is loaded into the silo 1 by some suitable method. In practice the peat need not bee fed into the silo absolutely evenly, rather it can be fed in suitable batches.
The silo includes two auxilliary mixerR 3, by means of which the arching of peat in the silo 1 is prevented. The screws 5 located on the foot of the silo 1 continue inside pipe 12 up to a distance of about 30 cm of the end of the pipe. The free initial parts of the screws 5 here form the mixer 8 proper. A
nozzle component 10 is attached the the end of pipe 12, this including a nozzle opening adjustable with bolts 11. The final -^ 20~5~7 section of pipe 12 and the nozzle component 10 form a pressurization chamber 9, through which the peat-sludge mass must travel before bursting out of nozzle 10. During the delay caused by this the sludge is able to be well absorbed by the peat mass.
The auxilliary mixers 3 and the screws 5 are here equipped with their own electric motor transmission units 6 and 7, but their operation can also be combined in a single motor. In practice it has been shown that a suitable rotational speed for the double screws 5 (diameter D = 240 mm) is about 120 rpm and correspondingly a suitable speed for the mixer axle would be 30 - 50 rpm. The pitch of the screws is about the same as the diameter. The mixer will tolerate a certain degree of unevennes~ in the feed of sludge and peat, but the feeding of too much s~udge alone must be avoided, because then the sludge begins to circulate in the screw conveyor, nor does the mass move forward any longer. Generally the problem disappear~ when balancing peat is fed to the silo. The best results are achieved by feeding peat and sludge to the mixer in an even flow.
Here the double screw 4 forms both a screw conveyor and a pre~surization unit.
According to the latest research the best form of application i~ regarded as being a mixer in accordance with Figures 4 and 5. In Figures 4 and 5 the same reference numbers are used for components that are operationally the same as those in Figures 1 - 3. These are a silo 1, the sludge feed connection 15, the double ~crew conveyor 4, its screws 5, the mixer 8 formed by their initial section, a pressurization chamber 9 formed by pipe 12, and nozzle component 10. The end of pipe 12 includes an end plate 17, on which the bearings 18 carrying screws 5 can easily be installed.
From the point of view of loading and in order to prevent arching one side of the silo 1 is vertical. The double-screw conveyor 4 is in a position that rises. In addition the 208~7 reducing the height of the device, this assists the feed of the sludge. Here the sludge is introduced simply by joining its connection 15 to the start of the pipe 12, in which case the real mixing of the sludge takes place in the first part of pipe 12. By means of this arrangement a continual flow of peat into the pressurization chamber 9 is ensured. The length of the closed section of the pipe 12 is about 3 m. In mixers in accordance with Figures 1 - 3 a phenomenon was observed, in which the sludge alone began to circulate in the screws 5, this being due to the effect of an uneven feed.
A separate pressurization section is not required in pipe 12, because the pitch of the end 14 of the screws 5 is less than that of the beginning 13. There is an opening 16 formed by nozzle 10 at the end of pipe 12, which can be adjusted by means of plate 19 moving in guides. The reduction in pitch (20%) at the end creates the required increase pressure here and the nozzle component 10 is formed simply by the discharge opening formed in the end of pipe 12.
The rotation of the screws 5 takes place by means of a tractor.
A cardan shaft in connected between its power-take-off and the continuation gear of the screws 5. Naturally the mixer can also be equipped with its own motor.
In this mixer a pre-mixing screw 20 i8 used, which returns the mass to the beginning of the screw conveyor 4. Thus effective pre-mixing is achieved.
By using the mixer of Figures 4 and 5 25 m3/h of very wet sludge can be mixed in a ratio 1:1 by volume with peat, when the motor output iB 40 kW. The mixing ratio of the mass can be varied within broad limits. The maximum pressure appears to be 15 - 20 bar. The pressure remains at more than 10 bar for even more than 10 ~econds. In order for the mixing to succeed a guide value can be given, according to which the pressure should remain at at least 8 bar (abs) for at least 3 seconds, preferably more than 5 seconds.
---`` 2 ~ 8 ~ ~ ~ 7 The pressurization device can also be formed in a manner differing from the abovementioned form of application. Even though a double screw has its own mixing effect, it is also pos~ible to use a single screw. The movement and pressurization can also be created by means of a piston device. Here the technique that is as such known from sod peat machines can be exploited. What is essential in the device is principally the fact that a considerable pressure arises at the end of the screw, by means of which the sludge is forced into the peat.
Various kinds of sludges form a waste problem, because they cannot be put directly into the natural environment. In nature the eludges threaten surface and ground waters. Sludges can cause smell, taste, hygienic and eutrophy problems in the environment. The most usual sludges are waste water and septic tank sludges, as well as the liquid manure produced in agriculture.
Attempts have been made to mix sludge with various kinds of dry masses, especially with peat. A homogenous mixture of peat and sludge has shown itself to be very advantageous on account of the fact that the sludge liquids and nutrients bind themselves to peat very effectively. In practice, however, the mixing of peat and especially liquid manure has been very difficult.
The~e do not mix naturally, the peat tending, even after mechanical treatment, to rise to the surface, nor does it, due to its great surface tension, suck the sludge into itself. Up until now mixing has taken place for example in such a way that the peat and liquid manure have been spread in layers as a mattress about 50 cm thick in a shallow pond. After this a tractor i8 driven several times on top of the mixture, when the final mixing and the sucking of the liguid manure into the cell structure of the peat has taken place. In practice this kind of method is laborious and slow, as well as expensive.
The purpose of the invention is to find a new mixing and a mixer, by means of which peat and sludge can be mixed as a homogenous mass as a continual process. The characteristic features of the method in accordance with the invention are presented in the accompanying Patent Claim 1 and the -- 20~0347 characteristic features of a corresponding mixer are presented in Patent Claim 3. The invention is based to a great extent on the realization that mixing takes place by raising the pressure of the mass to be mixed for a sufficiently long time, when the counter force caused by surface tension is overcome.
Patent Claim 4 presents an especially advantageous mixer solution, which to some extent overcomes even an uneven feed of peat and sludge.
In what follows the invention is illustrated with the aid of the accompanying illustrations, which show various mixers in accordance with invention.
5 Figure 1 shows a mixer seen from the side in partial cross-section Figure 2 shows a mixer seen from above, in cross-section at point II-II in Figure 1 Figure 3 shows a cross-section of Figure 1 at point III-III
Figure 4 shows another kind of mixer Figure 5 shows the mixer in Figure 4 seen from the side The principal component~ of the mixer in Figure 1 are the ~ilo 1 and the double screw 4 at the foot of it, continuations ofthe screws 5 being located in pipe 12. The pipe feeding sludge is joined to connection 15 and the sludge is sprayed longitudinally on top of screws 5 by means of a nozzle 2. Peat is loaded into the silo 1 by some suitable method. In practice the peat need not bee fed into the silo absolutely evenly, rather it can be fed in suitable batches.
The silo includes two auxilliary mixerR 3, by means of which the arching of peat in the silo 1 is prevented. The screws 5 located on the foot of the silo 1 continue inside pipe 12 up to a distance of about 30 cm of the end of the pipe. The free initial parts of the screws 5 here form the mixer 8 proper. A
nozzle component 10 is attached the the end of pipe 12, this including a nozzle opening adjustable with bolts 11. The final -^ 20~5~7 section of pipe 12 and the nozzle component 10 form a pressurization chamber 9, through which the peat-sludge mass must travel before bursting out of nozzle 10. During the delay caused by this the sludge is able to be well absorbed by the peat mass.
The auxilliary mixers 3 and the screws 5 are here equipped with their own electric motor transmission units 6 and 7, but their operation can also be combined in a single motor. In practice it has been shown that a suitable rotational speed for the double screws 5 (diameter D = 240 mm) is about 120 rpm and correspondingly a suitable speed for the mixer axle would be 30 - 50 rpm. The pitch of the screws is about the same as the diameter. The mixer will tolerate a certain degree of unevennes~ in the feed of sludge and peat, but the feeding of too much s~udge alone must be avoided, because then the sludge begins to circulate in the screw conveyor, nor does the mass move forward any longer. Generally the problem disappear~ when balancing peat is fed to the silo. The best results are achieved by feeding peat and sludge to the mixer in an even flow.
Here the double screw 4 forms both a screw conveyor and a pre~surization unit.
According to the latest research the best form of application i~ regarded as being a mixer in accordance with Figures 4 and 5. In Figures 4 and 5 the same reference numbers are used for components that are operationally the same as those in Figures 1 - 3. These are a silo 1, the sludge feed connection 15, the double ~crew conveyor 4, its screws 5, the mixer 8 formed by their initial section, a pressurization chamber 9 formed by pipe 12, and nozzle component 10. The end of pipe 12 includes an end plate 17, on which the bearings 18 carrying screws 5 can easily be installed.
From the point of view of loading and in order to prevent arching one side of the silo 1 is vertical. The double-screw conveyor 4 is in a position that rises. In addition the 208~7 reducing the height of the device, this assists the feed of the sludge. Here the sludge is introduced simply by joining its connection 15 to the start of the pipe 12, in which case the real mixing of the sludge takes place in the first part of pipe 12. By means of this arrangement a continual flow of peat into the pressurization chamber 9 is ensured. The length of the closed section of the pipe 12 is about 3 m. In mixers in accordance with Figures 1 - 3 a phenomenon was observed, in which the sludge alone began to circulate in the screws 5, this being due to the effect of an uneven feed.
A separate pressurization section is not required in pipe 12, because the pitch of the end 14 of the screws 5 is less than that of the beginning 13. There is an opening 16 formed by nozzle 10 at the end of pipe 12, which can be adjusted by means of plate 19 moving in guides. The reduction in pitch (20%) at the end creates the required increase pressure here and the nozzle component 10 is formed simply by the discharge opening formed in the end of pipe 12.
The rotation of the screws 5 takes place by means of a tractor.
A cardan shaft in connected between its power-take-off and the continuation gear of the screws 5. Naturally the mixer can also be equipped with its own motor.
In this mixer a pre-mixing screw 20 i8 used, which returns the mass to the beginning of the screw conveyor 4. Thus effective pre-mixing is achieved.
By using the mixer of Figures 4 and 5 25 m3/h of very wet sludge can be mixed in a ratio 1:1 by volume with peat, when the motor output iB 40 kW. The mixing ratio of the mass can be varied within broad limits. The maximum pressure appears to be 15 - 20 bar. The pressure remains at more than 10 bar for even more than 10 ~econds. In order for the mixing to succeed a guide value can be given, according to which the pressure should remain at at least 8 bar (abs) for at least 3 seconds, preferably more than 5 seconds.
---`` 2 ~ 8 ~ ~ ~ 7 The pressurization device can also be formed in a manner differing from the abovementioned form of application. Even though a double screw has its own mixing effect, it is also pos~ible to use a single screw. The movement and pressurization can also be created by means of a piston device. Here the technique that is as such known from sod peat machines can be exploited. What is essential in the device is principally the fact that a considerable pressure arises at the end of the screw, by means of which the sludge is forced into the peat.
Claims (8)
1. A method for mixing peat and sludge into a homogenous mass, in which method the peat and sludge are mixed mechanically, characterized in that in the mixing process the mechanically mixed mass is pressurization and squeezed after a delay through a nozzle (10).
2. A mixer in accordance with patent Claim 3, characterized in that the pressurization pressure is held at more than 8 bar for at least 3 seconds, preferably for more than 5 seconds.
3. A peat and sludge mixer intended to realize the method in accordance with Patent Claim 1, which consists of a sludge feed connection (15), a feed silo (1) and a screw conveyor (4) located on the bottom of it, which acts as a mixer (8) and a transfer device, and in which the screw conveyor is equipped with one or more screws and devices to rotate them and characterized in that a pressurization device is formed from the screw conveyor (4) and a pressurization chamber (9) from its pipe by connecting a nozzle component (10) to the end of the pipe (12), and that the sludge feed connection (15) is attached to the front end of the pressurization chamber (9) formed by pipe (12).
4. A mixer in accordance with Patent Claim 3, characterized in that one longitudinal side of the silo (1) is essentially vertical and the opposite side essentially slopes in the opening direction, and that the screw conveyor (4) is installed in a position that rises.
5. A mixer in accordance with Patent Claims 3 or 4, characterized in that the pitch (14) at the end of the screws (S) of the screw conveyor (4) is less than the pitch (13) at the beginning.
6. A mixer in accordance with Patent Claim 3, characterized in that the screws (5) extend for a maximum of at least three screw diameters from the opening of the nozzle (10), when a delay increasing the absorption time is obtained in the pressurization.
7. A mixer in accordance with Patent Claim 3, characterized in that two screws (5) rotating in opposite directions, and overlapping each other by 5 - 15% of their diameters, are used in the screw conveyor (4).
8. A mixer in accordance with Patent Claim 3, characterized in that the mixer includes a pre-mixing screw (20) in the silo (1) on top of the screw conveyor (4), the direction of movement of which is opposite in relation to this.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8903497A SE468048B (en) | 1988-10-25 | 1989-10-23 | Process and mixer for mixing peat and sludge to form a homogeneous mass |
| CA002080547A CA2080547A1 (en) | 1988-10-25 | 1992-10-14 | Device and method for mixing peat and sludge |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI884917A FI884917A (en) | 1988-10-25 | 1988-10-25 | FOERFARANDE OCH BLANDARE FOR BLANDNING AV TORV OCH SLAM TILL EN HOMOGEN MASSA. |
| CA002080547A CA2080547A1 (en) | 1988-10-25 | 1992-10-14 | Device and method for mixing peat and sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2080547A1 true CA2080547A1 (en) | 1994-04-15 |
Family
ID=25675588
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002080547A Abandoned CA2080547A1 (en) | 1988-10-25 | 1992-10-14 | Device and method for mixing peat and sludge |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2080547A1 (en) |
| SE (1) | SE468048B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997044296A1 (en) * | 1996-05-22 | 1997-11-27 | Ipete Ag | Thermo-mechanical method for garbage treatment |
| EP1201111A1 (en) * | 2000-10-24 | 2002-05-02 | PlanET Energietechnik GmbH | Feeding device for biogas installation |
| PL444900A1 (en) * | 2023-05-15 | 2023-10-09 | Prorys Spółka Z Ograniczoną Odpowiedzialnością | Flow-through mixer of peat materials |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI101292B (en) * | 1992-07-08 | 1998-05-29 | Osmo Nenonen | Method for removing water from biologically treated sewage sludge |
-
1989
- 1989-10-23 SE SE8903497A patent/SE468048B/en not_active IP Right Cessation
-
1992
- 1992-10-14 CA CA002080547A patent/CA2080547A1/en not_active Abandoned
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997044296A1 (en) * | 1996-05-22 | 1997-11-27 | Ipete Ag | Thermo-mechanical method for garbage treatment |
| EP1201111A1 (en) * | 2000-10-24 | 2002-05-02 | PlanET Energietechnik GmbH | Feeding device for biogas installation |
| PL444900A1 (en) * | 2023-05-15 | 2023-10-09 | Prorys Spółka Z Ograniczoną Odpowiedzialnością | Flow-through mixer of peat materials |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8903497L (en) | 1990-04-26 |
| SE468048B (en) | 1992-10-26 |
| SE8903497D0 (en) | 1989-10-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |