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  • Title: Anaerobic digestion of source-segregated domestic food waste: performance assessment by mass and energy balance.
    Author: Banks CJ, Chesshire M, Heaven S, Arnold R.
    Journal: Bioresour Technol; 2011 Jan; 102(2):612-20. PubMed ID: 20797849.
    Abstract:
    An anaerobic digester receiving food waste collected mainly from domestic kitchens was monitored over a period of 426 days. During this time information was gathered on the waste input material, the biogas production, and the digestate characteristics. A mass balance accounted for over 90% of the material entering the plant leaving as gaseous or digestate products. A comprehensive energy balance for the same period showed that for each tonne of input material the potential recoverable energy was 405 kWh. Biogas production in the digester was stable at 642 m3 tonne(-1) VS added with a methane content of around 62%. The nitrogen in the food waste input was on average 8.9 kg tonne(-1). This led to a high ammonia concentration in the digester which may have been responsible for the accumulation of volatile fatty acids that was also observed.
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