Granulation of a mixture of suspended anaerobic and aerobic cultures under alternating anaerobic/microaerobic/aerobic conditions: A preliminary study

G.N. Demirer, Goksel Demirer

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Abstract

This paper focuses on a new granulation study area where a mixture of suspended anaerobic and aerobics cultures was used as seed. Mixed suspended anaerobic and aerobic cultures exposed to alternating anaerobic/microaerobic/aerobic conditions developed granulates up to 2.5 mm in size. The granules developed displayed both oxygen uptake (3.83-8.75 mg dissolved oxygen g -1 volatile suspended solids h -1 ) and methanogenic activities (7.5 cm 3 CH 4 d -1 ) comparable to those of aerobic and anaerobic control cultures, respectively. Oxygen doses of 60, 100 and 120\% of the total chemical oxygen demand added (23, 38 and 45 cm 3 ) and ethanol (among ethanol, glucose, acetic acid, and glucose+acetic acid) resulted in the largest and the most stable granules. \textcopyright 2005 Society of Chemical Industry.
Original languageEnglish
JournalJournal of Chemical Technology and Biotechnology
Volume80
Issue number7
StatePublished - 2005

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