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Flender/Flender Gear Units/Bevel-helical gear Reduction Box B3

peel, citrus peel, and green pea pods, can be ensilaged and subsequently used for biogas production, thus overcoming the sea-sonal availability problem. The future of anaerobic digestion of fruit and vegetable processing wastes depends on the cost competitiveness of the biogas produced. With the ever-increasing price ofpetroleum products, favorable solution is likely to be realized in the immediate future. 5 COMPOSTING In the context of growing concern over environmental pollution caused by indiscriminate disposal of organic wastes such as fruit and vegetable processing wastes, composting isan environmentally friendly process. The end product obtained by composting can beadded back into the soil as an organic fertilizer. During the process of composting, the volume of the waste is reduced by 2%4% and the thermophilic temperatures (4 7C) attained destroy most of the pathogenic organisms as well as weed seeds that may be present in the waste material. Composting is natural aerobic biochemical process in which thermophilic micro- organisms transform organic material into stable soil-like product (. Several booksand reviews have exhaustively documented the process of composting (. large spectrum of microorganisms are involved in the composting process. Though the main classes are bacteria, fungi, actinomycetes, and protozoa, within eachclass there are many strains and at least 2 strains of bacteria are present. The numberof microbes in compost is phenomenal, approximately 2 /H1 9/ (. For an efcient composting process, the requirements for the microorganisms to survive and grow are very specic. The key control parameters are moisture content (4% 6%) (, carbon-to-nitrogen ratio (2: (, and pH ( ( of the waste material; temperature; and aeration (oxygen concentration). Therefore, the initial part ofpreparing the waste material for composting should achieve these parameters. Moisture content and aeration are related. High moisture content impairs oxygen