Costs and benefits of on-site organics composting

Article Abstract:

Modified on-site composting of organics or food residuals may prove to be a cost-effective, long-term management decision for some institutions. Organic composting can achieve the 65% solid waste diversion by 2000 goal in Washington state. A pilot project at the Echo Glen Children's Center in Washington demonstrates the beneficial cost analysis of the composting program. Less frequent refuse collection, inclusion of biosolids composting and increase in product volume can make the program more cost-effective. The composting system at the center is described.

Economic aspects, Washington, Waste management, Recycling (Waste, etc.), Recycling

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Collecting and composting food residuals

Article Abstract:

The end products of two different technologies for the processing of waste including food items, bottles, cans and plastic bags, the aerated static pile (ASP) and aerated turned windrow (ATW), are compared. The ATW composts have lesser density, more moisture holding capacity and low particle size, and the nutritional levels varied with the type of material used. In the ASP piles, the nutritional contents are not affected, probably due to the insulative cover, but the products obtained have physical characteristics that are not very good.

Analysis, Compost plants, Organic fertilizers, Organic wastes as fertilizer

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Assessing the degradability of polymeric materials

Article Abstract:

The search for a truly degradable synthetic polymer has led to the creation of the Advisory Committee on Degradable Polymers at the American Institute for Testing and Materials/Institute for Standards Research. The committee oversees the testing of these synthetic polymers on three levels. The first level is on screening, the second, on the first level of confirmation and the third, on the second level of confirmation. The results of a field study on the biodegradability of 11 synthetic polymers are presented.

Testing, Polymers, Plastics, Biodegradable plastics

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