Anaerobic.pptx - DEFINITION A series of biological...

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A series of biological processes in which microorganisms break down biodegradable material in the absence of oxygen. The word Anaerobic actually means ‘in the absence of oxygen’. The process is used for industrial or domestic purposes to manage waste or to produce fuels. DEFINITION
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What is Feedstock? The main raw material used in the manufacture of a product. The yield of biogas from a particular feedstock will vary according to the following criteria: Dry matter content. The energy left in the feedstock, if it has undergone prolonged storage it may already have begun to break down. Length of time in the digester. The type of AD plant and the conditions in the digester. The purity of the feedstock.
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Feedstock Food and Drink Waste Processing Residues Agricultural Residues Crops Sewage Sludge Municipal Wastewater Solids Livestock Manures *High-caloric feedstocks with lots of fat, sugar and starch typically yield more biogas than other materials.
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Pretreatment The pretreatment processes that can be applicable in enhancing biogas production can be grouped into mechanical, thermal, chemical, biological and combined pretreatment. Majority of researches associated with pretreatment of organic wastes for biogas production were devoted to mechanical, thermal and chemical methods accounting for 33, 24 and 21%, respectively. The remaining percentage could be based on combination of more than one methods. are classified into organic wastes (municipal waste, wastewater sludge, swine manure, cow manure and other related residues), energy crops (sunflower, rape, jatropha, cardoon, etc.), agricultural residues (banana stem, barley straw, rice straw, softwood spruce, etc.), agricultural crops (maize, wheat, barley, sweet sorghum, etc.) and non- conventional feedstocks (glycerol, microalgae, etc.)
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