Evaluating the impact of operational parameters on the formation of soluble microbial products (SMP) by activated sludge

Xie, Wen-Ming, Ni, Bing-Jie, Seviour, Thomas and Yu, Han-Qing (2013) Evaluating the impact of operational parameters on the formation of soluble microbial products (SMP) by activated sludge. Water Research, 47 3: 1073-1079. doi:10.1016/j.watres.2012.11.022


Author Xie, Wen-Ming
Ni, Bing-Jie
Seviour, Thomas
Yu, Han-Qing
Title Evaluating the impact of operational parameters on the formation of soluble microbial products (SMP) by activated sludge
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
1879-2448
Publication date 2013-03-01
Year available 2012
Sub-type Article (original research)
DOI 10.1016/j.watres.2012.11.022
Volume 47
Issue 3
Start page 1073
End page 1079
Total pages 7
Place of publication London, United Kingdom
Publisher IWA Publishing
Collection year 2013
Language eng
Formatted abstract
Soluble microbial products (SMP) are the major component of the residual organic fraction in biological wastewater treatment effluent. The impact of process parameters on SMP production by specific groups of bacteria is currently unknown. In this work, SMP production by activated sludge at different substrate concentrations, dissolved oxygen (DO) levels and temperatures, was evaluated by experimental and modeling approaches. The results showed that among the three parameters, SMP production was most sensitive to substrate concentration. Total SMP production was increased 70.5% by a threefold increase in substrate concentration, with SMP produced from heterotrophs, ammonia-oxidizing bacteria (AOB) and nitrite-oxidizing bacteria (NOB) increasing by 61.2%, 580.0% and 410.0%, respectively. The effect of temperature on SMP was less pronounced. Decreasing the temperature from 20 °C to 10 °C decreased total SMP by 17.2%, with SMP production from heterotrophs decreasing by 20.0%, and from the AOB and NOB increasing by 180.0% and 140.0%. DO concentration had nearly no effect on total and heterotrophic SMP production, while it did have a significant positive effect on autotrophic SMP production. SMP production from AOB and NOB decreased by 24.3% and 47.8%, respectively following a decrease in DO concentration from 8.7 to 1.5 mg/L. However, the net effect of DO on total SMP production was negligible.
Keyword Ammonia-oxidizing bacteria (AOB)
Dissolved oxygen
Nitrite-oxidizing bacteria (NOB)
Soluble microbial products (SMP)
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status Non-UQ
Additional Notes Published online 24 November 2012

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
Advanced Water Management Centre Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 9 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 11 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Fri, 03 May 2013, 19:23:48 EST by System User on behalf of Advanced Water Management Centre