Transcription of Anaerobic Digestion Basics
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Introduction Dairy, potatoes, and sugar beets all importantagricultural commodities in Idaho also generate ahuge amount of wastes. Two big waste-relatedchallenges facing the dairy and food processingindustries are emissions of odors and gases andmanure management. Gas emissions includegreenhouse gases; ammonia (NH3), a colorless gas witha pungent smell; and hydrogen sulfide (H2S), acolorless gas with the foul odor of rotten eggs. Rising energy prices, more restrictive regulatoryrequirements, and increasing concern over greenhousegas emissions are causing many people in Idaho s dairyand food-processing industries to consider anaerobicdigestion (AD) of wastes from their Digestion technology is being viewed as away to address environmental concerns, generaterenewable energy, cut bedding-material costs, reducepathogens and weed seeds associated with manure ,improve manure nutrient availability to plants, andsometimes generate new revenues.
Animal manure is used as a sole feedstock for most of the digesters currently operating around the world to produce biogas. Although convenient and feasible, using animal manure alone may not represent the most efficient way to produce biogas due to manure’s inherent deficiency of carbon (i.e., low carbon/nitrogen
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