EP0946340B1 - Verfahren zur konservierenden lagerung von frischem rund- und schnittholz - Google Patents
Verfahren zur konservierenden lagerung von frischem rund- und schnittholz Download PDFInfo
- Publication number
- EP0946340B1 EP0946340B1 EP97952739A EP97952739A EP0946340B1 EP 0946340 B1 EP0946340 B1 EP 0946340B1 EP 97952739 A EP97952739 A EP 97952739A EP 97952739 A EP97952739 A EP 97952739A EP 0946340 B1 EP0946340 B1 EP 0946340B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wood
- sheeting
- enclosure
- vol
- storage
- 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 - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/0095—Treating of wood not provided for in groups B27K1/00, B27K3/00 by employing wrappers
Definitions
- the invention relates to a method for preserving Storage of fresh logs and fresh sawn timber, such as Softwood and hardwood, for storage over long periods without loss of quality.
- Pesticide use is associated with the endangerment of nature and humans.
- a safe preservation option is the rapid processing and drying of the wood. This forces large cutting and drying reserves to be able to quickly process a large mass of logs (calamities, windthrow). Attempts to preserve fresh logs in dry pile are also known. However, the procedure is associated with a high risk of fungal and insect attack.
- DE-A-28 57 355 a method for the microbiological modification of hardwood by the action of microorganisms is known.
- the microorganisms bring about a selective change in the hardwood, the temperature, the moisture content of the wood, the O 2 content and the CO 2 content being regulated with regard to the microorganisms.
- DE-A-34 34 551 a specific color change is caused on logs by treatment with wood-destroying fungi. The color change occurs at the point where the mushroom culture was applied. The application of several wood cultures is also described, which is associated with an advantageous boundary layer formation.
- the invention is based on the object of a method develop with fresh logs with reasonable effort or fresh sawn timber of all tree types for a longer one Period without compromising quality and Strength properties can be stored without first sterilized, moistened, dried or with special Shielding gases must be treated.
- the airtight envelope does not guarantee this Oxygen can enter from the outside and no other generated carbon dioxide can escape from the envelope.
- This low oxygen content is achieved in that a further cycle begins after the breathing processes customary in fruit storage, in which CO 2 and H 2 O are released and which have ended with the consumption of O 2 . Fermentation processes take place in which additional CO 2 is released so that the proportion of CO 2 can increase further.
- the start of fermentation processes is in the invention (in Contrary to the storage of fruit) of essential advantage. On Cellulose and lignin breakdown is not associated, as it is only slight soluble sugars are broken down. Thus, the strength of the Get round or sawn timber.
- the biotechnological process started after the air is closed can be accelerated by minimizing the air volume involved in the casing.
- a housing advantageously a film with high diffusion resistance, is used to produce the air seal.
- the film can be doubled to reduce the risk of leakage.
- the advantage of a flexible cover is that the air volume can be reduced to a minimum (suction until the film tightly encloses the pile or lumber stack surface).
- the air seal can also be achieved in specially prepared warehouses, containers, ship holds, lined pits, silos or mine tunnels. After a short opening of the airtight casing for the removal of wood, the almost oxygen-free atmosphere is restored after a few days. Regardless of the time of year, the microorganisms are able to bring them back into their favorable condition. In addition, CO 2 , which is stored in the wood as a porous body and dissolved in the water bound in the wood, can be released again to produce a new gas equilibrium.
- the main advantage of the method according to the invention is in that the preservative storage without an additional Fumigation comes out.
- Duplicate dual films 2 were spread out on a flat surface and covered with 30 cbm of non-bared profiled wood, spruce 1, diameter groups 15-25 cm.
- Two measuring hoses 5 were laid without pressure in the pile and fastened to the film 2 with bulkhead screw connections 4 . According to FIG. 1, the protruding film 2 was then pulled over the pile and the two films 2 - separately from one another - were welded with a double seam.
- the oxygen content drops below 0.1%.
- the carbon dioxide content levels out at around 40% (cf. FIG. 4). After 24 months of storage, there is no evidence of blueness, red streaking or Halli-mash infestation.
- the flexural strengths measured according to DIN 52186 after storage are not lower than those of fresh comparative samples (cf. FIG. 5).
- a maple veneer trunk with a center diameter of 35 cm and a length of 3 m is rolled into double dual film 2 .
- a bulkhead screw connection is attached near the end faces of trunk 1 .
- the foils 2 are then double-welded 3 . After 2 weeks there is an atmosphere that contains less than 0.1% oxygen and whose carbon dioxide content is up to 30%.
- the wood is sealed in airtight Holds, filling the hold volume if possible, layered. Since the holds are already watertight thanks to bulkheads can only be closed, the air seal must be on top through airtight or sealed hatches. Around Shortening the setting time is called initial fumigation Combustion gases from the ship's diesel are fed into the hold.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Storage Of Harvested Produce (AREA)
- Storage Of Fruits Or Vegetables (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Mushroom Cultivation (AREA)
Description
Versuche, frisches Rundholz in Trockenpoltern zu konservieren, sind ebenfalls bekannt. Das Verfahren ist aber mit einem hohen Risiko des Pilz- und Insektenbefalles verbunden.
Bei DE-A- 34 34 551 wird an Rundholz eine gezielte Farbveränderung durch Behandlung mittels holzzerstörender Pilze hervorgerufen. Die Farbveränderung erfolgt an der Stelle, an der die Pilzkultur aufgetragen wurde. Es wird auch das Auftragen mehrerer Holzkulturen beschrieben, was mit einer vorteilhaften Grenzschichtbildung verbunden ist.
Nachteilig erscheint der beschriebene Begasungsaufwand und der relativ hohe Sauerstoffrestgehalt.
Zur Herstellung des Luftabschlusses wird eine Einhausung, vorteilhaft eine Folie mit hohem Diffusionswiderstand, verwendet. Zur Verminderung des Risikos einer Leckage kann die Folie gedoppelt werden. Der Vorteil einer flexiblen Hülle besteht darin, daß das Luftvolumen auf ein Minimum gesenkt werden kann (Absaugung, bis die Folie die Polter- bzw. Schnittholzstapeloberfläche eng umschließt).
Nach kurzzeitiger Öffnung der luftdichten Umhüllung zur Entnahme von Holz stellt sich nach Wiederverschluß in wenigen Tagen die nahezu sauerstofffreie Atmosphäre wieder ein. Die Mikroorganismen sind - unabhängig von der Jahreszeit - in der Lage, den für sie günstigen Zustand wieder herbeizuführen. Außerdem kann CO2, das im Holz als porösem Körper gespeichert und dem im Holz gebundenen Wasser gelöst ist, zur Herstellung eines neuen Gasgleichgewichtes wieder abgegeben werden.
- Fig. 1
- eine Anordnung mit mehreren Rundhölzern verschweißter bzw. verklebter doppelter Folienumhüllung
- Fig. 2
- eine Anordnung mit einem Rundholz mit verschweißter bzw. verklebter doppelter Folienumhüllung
- Fig. 3
- eine Klemmverbindung an den Folienrändern
- Fig. 4
- ein Diagramm mit Darstellung der Gasentwicklung bei Lagerung unter Luftabschluß
- Fig. 5
- ein Diagramm mit Darstellung der Biegefestigkeit im Lagerverlauf nach Lagerung unter Sauerstoffentzug mit Nullprobe und DIN-Wert
Claims (14)
- Verfahren zur konservierenden Lagerung von frischem Rund- und Schnittholz, bei dem das Holz unter einer Abdeckung eingelagert wird, wodurch Atmungs- und Gärungsprozesse von Pilzen, Bakterien sowie Atmungsprozesse noch lebender Holzzellen begünstigt werden, dadurch gekennzeichnet, daßdas frische Rund- oder Schnittholz (1) in einer luft- und lichtdicht schließenden Umhüllung (2) eingelagert wird,Sauerstoff unter Bildung von CO2, H2O und organischen Säuren abgebaut wird, wobei im wesentlichen Hemicellulosen und Zucker umgesetzt werden,und somit der Sauerstoffgehalt in der Umhüllung nach einer Einstelldauer von 3 bis 10 Tagen während der gesamten Lagerung weniger als 0,1 Vol.-% und der CO2-Gehalt über 21 bis 40 Vol.-% beträgt, wodurch das Wachstum holzzerstörender Pilze weitestgehend ausgeschlossen wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß zur Verkürzung der Einstelldauer durch zusätzliche Begasung mit CO2 der CO2-Gehalt auf über 21 Vol-% sofort nach der Einlagerung eingestellt wird.
- Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß vor Beginn der Atmungs- und Gärungsprozesse das Luftvolumen in der Umhüllung minimiert wird.
- Verfahren nach Anspruch 1 bis 3, dadurch gekennzeichnet, daß als Umhüllung eine feste oder flexible Einhausung verwendet wird, wobei der Innenraum der Einhausung zur Umgebung luft- und lichtdicht abgeschlossen wird.
- Verfahren nach Anspruch 1 bis 4, dadurch gekennzeichnet, daß als Umhüllung eine einfache oder doppelte, UV-beständige Plastikfolie (2) mit hohem Diffusionswiderstand verwendet wird.
- Verfahren nach Anspruch 5, dadurch gekennzeichnet, daß als Folie (2) eine zweischichtige Folie verwendet wird, deren schwarze Innenseite Lichtzutritt und damit Algenwachstum verhindert und deren weiße Außenseite Sonnenstrahlung reflektiert.
- Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Folien (2) jeweils einzeln oder gleichzeitig mit doppelter Schweißnaht (3) verschlossen werden.
- Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Folien (2) miteinander verklebt werden.
- Verfahren nach Anspruch 5 oder 6, dadurch gekennzeichnet, daß die Folien (2) plan aufeinander liegen, zwischen zwei Leisten (6) eingeklemmt werden, um diese straff gewickelt und mit einer Halterung (7) fixiert werden.
- Verfahren nach Anspruch 5 bis 9, dadurch gekennzeichnet, daß an den Folien Schottverschraubungen (4) für Gasmeßschläuche (5) angebracht werden, die die Folie durchdringen.
- Verfahren nach Anspruch 4 oder 10, dadurch gekennzeichnet, daß die Schottverschraubungen innerhalb der Umhüllung Verlängerungsschläuche aufweisen, und die Schlauchenden in entgegengesetzte Enden des Innenraumes der Umhüllung verlegt werden.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, daß an den Gasmeßschläuchen über Schnellkupplungen Meßgeräte angekoppelt werden, mit denen der Lagerungsverlauf anhand der Gaszusammensetzung kontrolliert werden kann.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß als feste Einhausung Container oder Laderäume verwendet werden.
- Verfahren nach Anspruch 13, dadurch gekennzeichnet, daß die Container oder Laderäume mit Abgasen aus dem Verbrennungsprozeß der Transportmittel bzw. stationären Anlagen beaufschlagt werden.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19652951 | 1996-12-19 | ||
DE19652951A DE19652951A1 (de) | 1996-12-19 | 1996-12-19 | Verfahren zur konservierenden Lagerung von frischem Rundholz |
PCT/DE1997/002966 WO1998026907A1 (de) | 1996-12-19 | 1997-12-19 | Verfahren zur konservierenden lagerung von frischem rund- und schnittholz |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0946340A1 EP0946340A1 (de) | 1999-10-06 |
EP0946340B1 true EP0946340B1 (de) | 2001-11-14 |
Family
ID=7815313
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97952739A Expired - Lifetime EP0946340B1 (de) | 1996-12-19 | 1997-12-19 | Verfahren zur konservierenden lagerung von frischem rund- und schnittholz |
Country Status (13)
Country | Link |
---|---|
US (1) | US6830727B1 (de) |
EP (1) | EP0946340B1 (de) |
JP (1) | JP2001506193A (de) |
CN (1) | CN1081521C (de) |
AT (1) | ATE208691T1 (de) |
CA (1) | CA2274636C (de) |
CZ (1) | CZ291309B6 (de) |
DE (2) | DE19652951A1 (de) |
DK (1) | DK0946340T3 (de) |
ES (1) | ES2167807T3 (de) |
NZ (1) | NZ336637A (de) |
RU (1) | RU2177406C2 (de) |
WO (1) | WO1998026907A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19652951A1 (de) | 1996-12-19 | 1998-06-25 | Univ Dresden Tech | Verfahren zur konservierenden Lagerung von frischem Rundholz |
FR2806953B1 (fr) * | 2000-03-31 | 2002-06-21 | Step | Abri leger et procede pour le stockage et la conservation dans un environnement confine de grumes et/ou de bois scies |
CN106965281B (zh) * | 2017-04-10 | 2018-10-23 | 阜南佳利工艺品有限公司 | 一种提高杨树木板抗老化性能的处理方法 |
RU192914U1 (ru) * | 2019-06-04 | 2019-10-07 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Уральский государственный лесотехнический университет" | Штабель для хранения круглых лесоматериалов |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE267188C (de) | 1911-04-12 | |||
US2617202A (en) * | 1949-08-15 | 1952-11-11 | Earl L Reedy | Process of curing and treating lumber |
US3431061A (en) * | 1963-10-11 | 1969-03-04 | Union Bag Camp Paper Corp | Preserving method for outdoor storage of wood used in paper manufacture |
SE407758B (sv) | 1977-10-04 | 1979-04-23 | Enfors Sven Olof | Forfarande for mikrobiologisk modifiering av lovtre genom inverkan av aeroba mikroorganismer |
EP0058499A1 (de) * | 1981-02-12 | 1982-08-25 | Blacknell Building Products Limited | Imprägnierung von Holz |
SE455477B (sv) | 1983-09-20 | 1988-07-18 | Hansson Goeran | Forfarande for att bearbeta tre for att astadkomma zoneringar i treet med hjelp av svampar samt zonerat trematerial |
DD267188A1 (de) * | 1987-12-24 | 1989-04-26 | Univ Dresden Tech | Verfahren zur konservierung von holz |
JPH0639811A (ja) * | 1992-07-27 | 1994-02-15 | Nippon Sanso Kk | 木材の保存方法 |
US5363568A (en) | 1992-11-20 | 1994-11-15 | Cornelia Textiles, Inc. | Method of inhibiting lumber checking |
US5447686A (en) * | 1994-06-17 | 1995-09-05 | Seidner; Marc A. | Method for heat-treating wood and wood products |
NZ280874A (en) | 1996-01-23 | 1997-08-22 | Nz Forest Research Inst Ltd | Prevention of sapstain in wood by applying a water barrier over the wood surface |
US5718851A (en) * | 1996-04-22 | 1998-02-17 | Wadas, Jr.; Ronald M. | Pile cap assembly and method |
US5725613A (en) * | 1996-07-08 | 1998-03-10 | Hazen Research, Inc | Method to reduce oxidative deterioration of bulk materials |
US6063336A (en) * | 1996-08-02 | 2000-05-16 | Westward Corporation | Method and apparatus for wood chip pasteurization |
DE19652951A1 (de) | 1996-12-19 | 1998-06-25 | Univ Dresden Tech | Verfahren zur konservierenden Lagerung von frischem Rundholz |
-
1996
- 1996-12-19 DE DE19652951A patent/DE19652951A1/de not_active Withdrawn
-
1997
- 1997-12-19 CZ CZ19992250A patent/CZ291309B6/cs not_active IP Right Cessation
- 1997-12-19 US US09/319,126 patent/US6830727B1/en not_active Expired - Fee Related
- 1997-12-19 CN CN97180821A patent/CN1081521C/zh not_active Expired - Fee Related
- 1997-12-19 ES ES97952739T patent/ES2167807T3/es not_active Expired - Lifetime
- 1997-12-19 NZ NZ336637A patent/NZ336637A/en unknown
- 1997-12-19 AT AT97952739T patent/ATE208691T1/de active
- 1997-12-19 EP EP97952739A patent/EP0946340B1/de not_active Expired - Lifetime
- 1997-12-19 WO PCT/DE1997/002966 patent/WO1998026907A1/de active IP Right Grant
- 1997-12-19 CA CA002274636A patent/CA2274636C/en not_active Expired - Fee Related
- 1997-12-19 DK DK97952739T patent/DK0946340T3/da active
- 1997-12-19 JP JP52719698A patent/JP2001506193A/ja not_active Ceased
- 1997-12-19 RU RU99116020/12A patent/RU2177406C2/ru not_active IP Right Cessation
- 1997-12-19 DE DE59705415T patent/DE59705415D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0946340A1 (de) | 1999-10-06 |
CA2274636A1 (en) | 1998-06-25 |
ES2167807T3 (es) | 2002-05-16 |
NZ336637A (en) | 2001-09-28 |
CN1081521C (zh) | 2002-03-27 |
CA2274636C (en) | 2007-01-30 |
CZ225099A3 (cs) | 2000-01-12 |
DE59705415D1 (de) | 2001-12-20 |
WO1998026907A1 (de) | 1998-06-25 |
DE19652951A1 (de) | 1998-06-25 |
DK0946340T3 (da) | 2002-02-25 |
JP2001506193A (ja) | 2001-05-15 |
CZ291309B6 (cs) | 2003-01-15 |
US6830727B1 (en) | 2004-12-14 |
ATE208691T1 (de) | 2001-11-15 |
RU2177406C2 (ru) | 2001-12-27 |
CN1244830A (zh) | 2000-02-16 |
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