NDLI: Biodegradability of extracellular polymeric substances produced by aerobic granules

Content Provider	Springer Nature Link
Author	Wang, Zhi Wu Liu, Yu Tay, Joo Hwa
Copyright Year	2006
Abstract	This study investigated the biodegradability of extracellular polymeric substances (EPS) produced by aerobic granules. Aerobic granules were precultivated with synthetic wastewater in a lab-scale sequencing batch reactor. EPS were extracted from aerobic granules and were then fed as the sole carbon source to their own producers. Results showed that about 50% of EPS produced by aerobic granules could be utilized by their producers under aerobic starvation condition. The average biodegradation rate of the granule EPS in terms of chemical oxygen demand was five times slower than that of acetate, but 50 times faster than that of nonbiodegradable EPS produced by aerobic granules. The nonbiodegradable EPS was mainly found on the outer shell of aerobic granule. EPS produced by aerobic granules basically comprised two major components, i.e., biodegradable and nonbiodegradable EPS. The biodegradable EPS could serve as a useful energy source to sustain the growth of aerobic granules under starvation. This study provides experimental evidence that part of the EPS produced by aerobic granules would be biodegradable, but only nonbiodegradable EPS would play a crucial role in maintaining the structural integrity of aerobic granule.
Starting Page	462
Ending Page	466
Page Count	5
File Format	PDF
ISSN	01757598
Journal	Applied Microbiology and Biotechnology
Volume Number	74
Issue Number	2
e-ISSN	14320614
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-11-14
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Aerobic granule Polysaccharides Protein Biodegradability Microbial Genetics and Genomics Microbiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Medicine Applied Microbiology and Biotechnology Biotechnology

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