Thermo- and mesophilic aerobic batch biodegradation of high-strength distillery wastewater (potato stillage)--utilisation of main carbon sources.
The aim of the study was to ascertain the extent to which temperature influences the utilisation of main carbon sources (reducing substances determined before and after hydrolysis, glycerol and organic acids) by a mixed culture of thermo- and mesophilic bacteria of the genus Bacillus in the course of aerobic batch biodegradation of potato stillage, a high-strength distillery effluent (COD=51.88 g O(2)/l). The experiments were performed at 20, 30, 35, 40, 45, 50, 55, 60 and 63 degrees C, at pH 7, in a 5l working volume stirred-tank bioreactor (Biostat B, B. Braun Biotech International) with a stirrer speed of 550 rpm and aeration at 1.6 vvm. Particular consideration was given to the following issues: (1) the sequence in which the main carbon sources in the stillage were assimilated and (2) the extent of their assimilation achieved under these conditions.
Krzywonos
Małgorzata
M
Department of Bioprocess Engineering, Wrocław University of Economics, Komandorska 118/120, 53-345 Wrocław, Poland. malgorzata.krzywonos@ue.wroc.pl
Cibis
Edmund
E
Lasik
Małgorzata
M
Nowak
Jacek
J
Miśkiewicz
Tadeusz
T
D001407:Bacillus / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D002244:Carbon / Q000378:metabolism*; D019649:Food Industry; D007220:Industrial Waste; D011198:Solanum tuberosum; D013696:Temperature; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D002244:Carbon