Carbonization And Preservative Treatment On The Influence Of Microbial Life Condition Of Wood

Wood is a kind of natural resources, preservative treatment can prolong the service life of wood, and has important significance to save timber, protect forest resources. Traditional wood preservative methods have many disadvantages, but carbonization and preservative treatment is pure physics, also an ideal timber anticorrosion technology.This paper base on the concept of charring anticorrosived wood, made the charring anticorrosived wood of poplar and pinus sylvestris under the different process conditions. To analysis the mechanism of carbonization and preservative treatment, the paper analyses the change of nitrogen nutrition, thiamine (vitamin B1), inorganic salt, moisture content, and pH value of wood after carbonization and preservative treatment. So understand the influence of carbonization and preservative treatment for wood microbial survival condition.1. The carbon sources on wood are very rich, mainly of cellulose, hemicellulose, and sugar in the hemicellulose. This paper studied the influence of carbonization process for cellulose content of poplar and pinus sylvestris. The results show that the cellulose content of poplar and pinus sylvestris decreased after carbonization and preservative treatment.2-The nitrogen source of nutrients is a major elements of fungal cell protein and nucleic acid, also is the important nutrition of fungal growth. Wood is rich in nitrogen, and in the form of amino acids. Thesis studied the effect of the carbonization process for amino acid content of poplar. The results show that the amino acid content of poplar decreased after carbonization and preservative treatment.3. The microbial can not life and activities without inorganic substances. The ash in microbial cells is mainly inorganic salt, these ash can meet the grow need of bacteria. Through determination the content of ash in carbonized wood, can determine the content changes of S, P, K, Mg, and so on, that wood rotting fungi growth needed. The results show that the ash content of poplar and pinus sylvestris decreased after carbonization and preservative treatment.4. Many of these microorganisms can’t compound vitamin B1individual, as well as wood decay fungi. But wood contain with vitamin B1, or thiamine. The results showed that the vitamin B, content of poplar is less, and with the change of the coking process, the content of vitamin B1no regular change trend.5. Microbial cells full of moisture, it is not only the main components of the cell protoplasm colloid, also can provide an aqueous environment for discharge of waste and absorption of nutrients. So the microorganisms can not growth and breed without water. The results show that the moisture content of poplar and pinus sylvestris decreased obviously after carbonization and preservative treatment.6. The fungus can live and breed in the environment of pH4.5-5.5. Wood are partial acid, and pH value between4.0-6.5, this slightly acidic conditions suitable for fungus to grow. Test results show that the pH of poplar and pinus sylvestris decreased after carbonization and preservative treatment.After carbonization and preservative treatment, the change of wood fiber content, moisture content and pH value is bigger. So the essence of the c carbonization and preservative treatment is decomposition wood fiber content, reduce the wood moisture content, and lower the pH value of the wood. Be destroyed as long as one condition of microbial growth, microbial life and activities will end, and also to reach the effect of antiseptic.