Bioremediation and degradation of CCA-treated wood waste.

Barbara L. Illman; Vina Yang

Treesearch

Bioremediation and degradation of CCA-treated wood waste.

Informally Refereed

Authors:

Barbara L. Illman, Vina Yang

Year:

2004

Type:

Miscellaneous Publication

Station:

Forest Products Laboratory

Source:

Proceedings of Environmental Impacts of Preservative-Treated Wood, February 8-11, 2004, Orlando, Florida, USA : Pre-conference Proceedings. Gainesville, Fla. : Florida Center for Environmental Solutions, 2004. 1 CD-Rom. 10 pages.

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Abstract

Bioprocessing CCA wood waste is an efficient and economical alternative to depositing the waste in landfills, especially if landfill restrictions on CCA waste are imposed nation wide. We have developed bioremediation and degradation technologies for microbial processing of CCA waste. The technologies are based on specially formulated inoculum of wood decay fungi, obtained through strain selection to obtain metal tolerant fungi. Two strains of Meruliporia incrassata and two strains of Antrodia radiculosa were selected for capacity to degrade CCA wood, thereby reducing the waste volume. Formulation of the fungal inoculum requires a lignocellulose substrate and a nutrient supplement to optimize fungal establishment and growth on the waste wood. The inoculum can be prepared in standard sterile containers or small to intermediate scale bioreactors, applied to the waste wood and maintained in an aerated and hydrated environment having temperature conditions sufficient to allow fungal growth. Oxidation states of chromium, copper and arsenic remained constant during wood processing as determined earlier by synchrotron-based technologies. The criteria for selecting fungal strains, nutrients, lignocellulose substrate, optimum growth conditions and wood analysis provided the basis for developing a fungal processing system to degrade CCA treated wood waste while removing the metals.

Keywords

Bioremediation, CCA, wood waste, Meruliporia incrassata

Citation

Illman, Barbara L; Yang, Vina W. 2004. Bioremediation and degradation of CCA-treated wood waste. Proceedings of Environmental Impacts of Preservative-Treated Wood, February 8-11, 2004, Orlando, Florida, USA : Pre-conference Proceedings. Gainesville, Fla. : Florida Center for Environmental Solutions, 2004. 1 CD-Rom. 10 pages.