MADISON, WI, March 29, 2010- The number of waste treatment facilities using biological processes to biodegrade waste has been increasing over the years. These installations receive municipal and industrial organic wastes with the common main goal of reducing their biodegradable organic matter content. Composting, anaerobic digestion, and mechanical-biological treatment plants contribute to organic matter recycling and energy recovery, and avoid landfilling.
The general goal of those facilities is to stabilize the organic wastes. Stability is defined as the extent to which readily biodegradable organic matter has decomposed. Microorganisms perform the work of decomposition, but what determines when they are finished? A consensus has not yet been reached concerning the most suitable measurement of biodegradable organic matter, or stability, in a solid organic waste. A method for the measure of stability will allow for the proper analysis and design of waste treatment facilities and it is required to evaluate their efficiency.
The composting research group at Autonomous University of Barcelona led by Dr. Antoni Snchez has investigated different methodologies to measure stability focusing on biological indicators, in a study funded by the Spanish Science and Education Ministry and the Catalonia Waste Agency. Authors have presented an improved methodology in the March-April 2010 issue of the Journal of Environmental Quality, which offers a reliable measurement of the biodegradable organic matter content in organic solid materials, useful for researchers and industrial operators. The journal is published by the American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America.
This study analyzed samples of food and garden wastes, mixed municipal solid wastes and sludge from wastewater treatment plants. The proposed methodology measures the respiration activity of microorganisms in the waste samples a
|Contact: Sara Uttech|
American Society of Agronomy