Thursday, 15 May 2014

Anaerobic digester/REF /19 /2014


   

  Anaerobic digester. These processes and systems harness anaerobic digestion for purposes such as sewage treatment and biogas generation. Anaerobic digesters can be categorized according to two main criteria: by whether the biomass is fixed to a surface ("attached growth") or can mix freely with the reactor liquid ("suspended growth"); and by the organic loading rate (the influent mass rate of chemical oxygen demand per unit volume). The widely used UASB reactor, for example, is a suspended-growth high-rate digester, with its biomass clumped into granules that will settle relatively easily and with typical loading rates in the range 5-10 kgCOD/m3/d.




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