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Granulation of a mixture of suspended anaerobic and aerobic cultures under alternating anaerobic/microaerobic/aerobic conditions: a preliminary study
Author(s) -
Ergüder Tuba H,
Demirer Göksel N
Publication year - 2005
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.1296
Subject(s) - anaerobic exercise , acetic acid , chemistry , granulation , oxygen , chemical oxygen demand , ethanol , food science , volatile suspended solids , microbiology and biotechnology , biochemistry , biology , wastewater , environmental engineering , organic chemistry , materials science , physiology , environmental science , composite material
This paper focuses on a new granulation study area where a mixture of suspended anaerobic and aerobic 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. Copyright © 2005 Society of Chemical Industry