Bacterial Community Composition of Activated Sludge Relative to Type and efficiency of Municipal Wastewater Treatment Plants

• Published in: Journal of microbiology and biotechnology Vol. 13; no. 1; pp. 15 - 21
• Main Authors: Ahn, I.S, La, H.J, Choi, K.M, Kwon, J.C. (KAIST, Daejeon, Republic of Korea);Kim, M.W. (Daejun University, Kyunggi, Republic of Korea)
• Format: Journal Article
• Language: English
• Published: Seoul Korean Society for Applied Microbiology 01.02.2003
• Subjects: activated sludge; Biological and medical sciences; Biological treatment of waters; Biotechnology; Environment and pollution; Fundamental and applied biological sciences. Psychology; Industrial applications and implications. Economical aspects; phylogeny; Activated sludge; Restriction fragment length polymorphism; 16S rDNA; T-RFLP; Ribosomal DNA; Urban waste water; bacterial community; Phylogeny; Waste water purification; Microbial community; Biological purification
• ISSN: 1017-7825

Two microbial communities of activated sludge in the same municipal wastewater, but treated with different systems, were studied and compared using molecular microbiological approaches. The bacterial using molecular microbiological approaches. The bacterial 16S rDNA sequences from 124 clones were analyzed, however, the majority of them were not closely related to any known species, and found to belong to 8 different phylogenetic groups and 3 different unidentified groups. The relative frequencies of each group were similar between the two microbial communities. Fingerprinting using terminal restriction fragment length polymorphism showed that the putative Nitrospira-related populations were more diverse and quantitatively Nitrospira-related populations were more diverse and quantitatively higher in the KNR process system than in the other system using a conventional activated sludge process.