CA1110864A - Method for manufacturing fertilizer from tree bark - Google Patents
Method for manufacturing fertilizer from tree barkInfo
- Publication number
- CA1110864A CA1110864A CA299,475A CA299475A CA1110864A CA 1110864 A CA1110864 A CA 1110864A CA 299475 A CA299475 A CA 299475A CA 1110864 A CA1110864 A CA 1110864A
- Authority
- CA
- Canada
- Prior art keywords
- refuse
- bark
- molasses
- mixture
- tree bark
- 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.)
- Expired
Links
Classifications
-
- 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
- Processing Of Solid Wastes (AREA)
- Fertilizers (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
In a method for treating tree bark with molasses to render it suitable for use as fertilizer, the improvement which comprises reducing the pH value of the molasses to 3.5 and then passing the mixture of bark and molasses through a rotating and pressurized oven.
In a method for treating tree bark with molasses to render it suitable for use as fertilizer, the improvement which comprises reducing the pH value of the molasses to 3.5 and then passing the mixture of bark and molasses through a rotating and pressurized oven.
Description
Tree bark has been used as a fuel and as ~ ~ertilizer.
For the latter purpose, tree bark has among other things been composted using bacteria as an aid in decomposing the tree bark over the period of a few months. However, the loss of nitrogen in this process makes the end result unsuitable as fertilizer.
About ten years ago a method was invented, see Finnish patent No. 44,124, in which the toxic substances contained in the tree bark could be extracted, and where nitrogen and other mineral nutrients were not lost. Bark refuse processed by this method is very suitable as fertilizer. By the method in question, crushed tree bark refuse i8 cooked for some time with molasses refuse from the sugar industxy.
The nutrients contained in the lignin then become soluble to such an extent that they can be used by plants. However, a flaw in this method is that, due to the cooking process con-tained in it, it is not suitable for continuous production, and also, a more complete dislntegration of the nutrients con-tained in the lignln would be apt to further improve the possi-bilities of the plants to make use of these same nutrients.
The present invention consists of a meth~d for manufac-turing fertilizer from tree bark refuse comprising supplying crushed tree bark refuse to a mixing apparatus supplying molasses refuse, the pH of which has been lowered to approximately 3.5, to the mixing apparatus, mixing the molasses refuse with the bar~ refuse, transporting the mixture of bark and molasses in a continuous flow through a rotating and pressurized oven wherein the mixture is heated and whereby toxic substances are extracted from the tree bark and the nutrients contained in the tree bark become soluble and thus usable by plants.
A better disintegration of the lignin than before is B
86g obtained by lowering the pH-value of the molasses to said value of 3.5 , at which the pressure and the heat break it down extreme-ly well.
A preferred embodiment of the invention will now be described, by way of example, with reference to the accompanying flow chart. Tree bark refuse is fed from the storage silo 1 into the hammer mill 2 and then to the dosing mill 3. On the belt conveyor 4 molasses are added, the pH content of which has been lowered in equipment 5 to approximately the value - la -~1iI864 of 3.5. There are two rotating and pressurized ovens 7, into which the screw conveyors 6 feed the compound, so that cleaning of the ovens does not cause any breaks in production. The ingress and egress of the compound to and from the ovens is aided by suction, pipes for which are marked 8.
After the ovens the compound is carried by the screw conveyor 9 to the cooling devices 10, of which there are two, and lastly it is carried by the cooling conveyor 11, which is a belt conveyor. The method may of course be carried out in other ways than by using the equipment described above, which, however, has proved itself to be very practical.
For the latter purpose, tree bark has among other things been composted using bacteria as an aid in decomposing the tree bark over the period of a few months. However, the loss of nitrogen in this process makes the end result unsuitable as fertilizer.
About ten years ago a method was invented, see Finnish patent No. 44,124, in which the toxic substances contained in the tree bark could be extracted, and where nitrogen and other mineral nutrients were not lost. Bark refuse processed by this method is very suitable as fertilizer. By the method in question, crushed tree bark refuse i8 cooked for some time with molasses refuse from the sugar industxy.
The nutrients contained in the lignin then become soluble to such an extent that they can be used by plants. However, a flaw in this method is that, due to the cooking process con-tained in it, it is not suitable for continuous production, and also, a more complete dislntegration of the nutrients con-tained in the lignln would be apt to further improve the possi-bilities of the plants to make use of these same nutrients.
The present invention consists of a meth~d for manufac-turing fertilizer from tree bark refuse comprising supplying crushed tree bark refuse to a mixing apparatus supplying molasses refuse, the pH of which has been lowered to approximately 3.5, to the mixing apparatus, mixing the molasses refuse with the bar~ refuse, transporting the mixture of bark and molasses in a continuous flow through a rotating and pressurized oven wherein the mixture is heated and whereby toxic substances are extracted from the tree bark and the nutrients contained in the tree bark become soluble and thus usable by plants.
A better disintegration of the lignin than before is B
86g obtained by lowering the pH-value of the molasses to said value of 3.5 , at which the pressure and the heat break it down extreme-ly well.
A preferred embodiment of the invention will now be described, by way of example, with reference to the accompanying flow chart. Tree bark refuse is fed from the storage silo 1 into the hammer mill 2 and then to the dosing mill 3. On the belt conveyor 4 molasses are added, the pH content of which has been lowered in equipment 5 to approximately the value - la -~1iI864 of 3.5. There are two rotating and pressurized ovens 7, into which the screw conveyors 6 feed the compound, so that cleaning of the ovens does not cause any breaks in production. The ingress and egress of the compound to and from the ovens is aided by suction, pipes for which are marked 8.
After the ovens the compound is carried by the screw conveyor 9 to the cooling devices 10, of which there are two, and lastly it is carried by the cooling conveyor 11, which is a belt conveyor. The method may of course be carried out in other ways than by using the equipment described above, which, however, has proved itself to be very practical.
Claims (6)
1. A method for manufacturing fertilizer from tree bark refuse comprising supplying crushed tree bark refuse to a mixing apparatus, supplying molasses refuse, the pH of which has been lowered to approximately 3.5, to said mixing apparatus, mixing the molasses refuse with said bark refuse, transporting said mixture of bark and molasses in a continuous flow through a rotating and pressurized oven wherein said mixture is heated and whereby toxic substances are extracted from the tree bark and the nutrients contained in the tree bark become soluble and thus usable by plants.
2. A method as claimed in claim 1, wherein the mixture of bark and molasses is transported through two of said ovens in parallel arrangement.
3. A method as claimed in claim 1 or 2, wherein the heated mixture is passed through at least one cooling device and is finally deposited on a cooling conveyor.
4. A method according to claim 1 wherein said molasses refuse is supplied by a sugar processing plant.
5. A method according to claim 1 or 4 wherein said toxic substances extracted include bark acids.
6. A method according to claim 1, 2, or 4 wherein said mixing apparatus comprises screw conveyor means which transport the mixture into said oven.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI780052 | 1978-01-09 | ||
| FI780052 | 1978-01-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1110864A true CA1110864A (en) | 1981-10-20 |
Family
ID=8511381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA299,475A Expired CA1110864A (en) | 1978-01-09 | 1978-03-22 | Method for manufacturing fertilizer from tree bark |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1110864A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4571254A (en) * | 1984-03-28 | 1986-02-18 | Arvo Wahlberg | Method for producing fertilizer from tree ash and softwood bark or from other tree waste |
-
1978
- 1978-03-22 CA CA299,475A patent/CA1110864A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4571254A (en) * | 1984-03-28 | 1986-02-18 | Arvo Wahlberg | Method for producing fertilizer from tree ash and softwood bark or from other tree waste |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |