Feedstocks for anaerobic digestionĪD is mostly used for treatment of liquid and solid wastes, such as industrial wastewater with high organic content, the organic fraction of municipal solid waste (MSW), and sewage sludge. They can be installed in wastewater treatment plants, farms, rural households, or as stand-alone plants. These digesters come in many types, shapes, and sizes. This process is replicated inside enclosed reactors called “digesters” that are fed with organic feedstock. 1).ĪD occurs naturally in wetlands, marshes, and landfills, as well as inside the stomach of ruminants. The effluent or digestate is rich in nutrients and is usually land-applied as a fertilizer and soil amendment (Fig.
AD transforms organic matter into biogas and a nutrient-rich effluent or “digestate.” Biogas is a mixture of gases, mainly methane (CH 4) and carbon dioxide (CO 2), which can be either burned directly for heat and power generation, or upgraded to be used as a transportation fuel. AD is a mature technology used for decades as a waste stabilization and/or bioenergy production process. Anaerobic digestion (AD) is a biochemical process that uses microorganisms to degrade organic materials.
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