NDLI: Laboratory assessment of biofilm process and its microbial characteristics for treating nonpoint source pollution

Content Provider	Springer Nature Link
Author	Choi, Gi Choong Lee, Jae Ho Yu, Jae Cheul Ju, Dong Jin Park, Jeung Jin
Copyright Year	2011
Abstract	A biofilm process with the attached bacterial growth onto ceramic media was applied to remove carbonaceous and nitrogenous pollutants from nonpoint water source. The packing ratios of ceramic media were 0.05 and 0.15 (v/v). Thereafter, the reactors were operated intermittently in sequencing batch mode with different cycle periods: 0, 5, 10 and 15 d. The COD and NH$_{4}$ $^{+}$-N removal efficiencies were investigated under different operating conditions, such as media packing ratio, temperature and interevent period. Additionally, polymerase chain reaction (PCR)-denaturing gel gradient electrophoresis (DGGE) and INT-dehydrogenase activity (DHA) tests were conducted to observe the microbial community and activity in the biofilm. Consequently, the removal efficiency of the organic matter after 8 h remained stable, even with longer interevent periods, regardless of the packing ratio. The interevent period and packing ratio seemed to have no significant influence on the COD removal efficiency. However, stable nitrification efficiency, with longer interevent period, was only achieved with a packing ratio of 0.15. Therefore, a packing ratio above 0.15 was required to simultaneously achieve stable COD removal and nitrification efficiency. The DGGE profiles revealed that the prevalent microorganism species were changed from that of the seeded activated sludge into those detected in the sediments. Due to the prevalence of microorganisms related to the sediment, their activities did not decrease, even after a 15 d interevent period.
Starting Page	1207
Ending Page	1213
Page Count	7
File Format	PDF
ISSN	02561115
Journal	Korean Journal of Chemical Engineering
Volume Number	28
Issue Number	5
e-ISSN	19757220
Language	English
Publisher	Springer US
Publisher Date	2011-04-12
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Biofilm INT-dehydrogenase Activity Microbial Community Nonpoint Source PCR-DGGE Industrial Chemistry/Chemical Engineering Biotechnology Materials Science Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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