CHARACTERIZATION OF AEROBIC AND FACULTATIVE ANAEROBIC-BACTERIA FROM THE LIQUID-PHASE OF AN ANAEROBIC FIXED-BED DIGESTER TREATING A CHEESE WHEY SUBSTRATE

作     者：DEHAAST, J BRITZ, TJ 

作者机构：UNIV ORANGE FREE STATEDEPT MICROBIOLBLOEMFONTEIN 9300SOUTH AFRICA 

出 版 物：《MICROBIAL ECOLOGY》 (微生物生态学)

年 卷 期：1986年第12卷第2期

页      面：173-179页

核心收录：

学科分类：0710[理学-生物学] 1007[医学-药学(可授医学、理学学位)] 100705[医学-微生物与生化药学] 07[理学] 071005[理学-微生物学] 0713[理学-生态学] 10[医学] 

主　　题：Application programming interfaces Aerobic digestion Anaerobic manure digesters Anaerobic bacteria Streptococcus Digestion Whey cheeses Fermentation 

摘      要：Bacterial counts on the liquid phase of an anaerobic, fixed-bed digester, treating a deproteinated, prefermented cheese whey substrate, were conducted on two different media under aerobic and facultative conditions. Average counts of 16.6×106 and 26.5×106 ml?1 were obtained on the two media, with the nutritionally poorer of the two media giving the highest average count. Seventy-five isolates from both media, incubated aerobically as well as in anaerobic jars, were obtained. These isolates as well as 13 reference strains were phenotypically characterized. The similarities between cultures were calculated using the similarity coefficient of Sokal and Michener [16]. The organisms were clustered using the unweighted pair group method, and the results presented as a simplified dendrogram. The isolates could be divided into 3 main groups: gram-negative fermentative rods, mainlyEnterobacter, Klebsiella, andCitrobacter, withKlebsiella as the predominant genus; gram-positive bacteria, mainly enterococci; and gram-negative nonfermentive rods of the generaPseudomonas, Alcaligenes, andAcinetobacter. All the enterobacteria and enterococci were able to produce acetic acid, an intermediate in methanogenesis.