Measurement and quantification of sessile and planktonic microbial populations during the anaerobic digestion of cellulose

Jensen, P., Hardin, M.T. and Clarke, W.P. (2008) Measurement and quantification of sessile and planktonic microbial populations during the anaerobic digestion of cellulose. Water Science and Technology, 57 4: 465-469. doi:10.2166/wst.2008.106


Author Jensen, P.
Hardin, M.T.
Clarke, W.P.
Title Measurement and quantification of sessile and planktonic microbial populations during the anaerobic digestion of cellulose
Journal name Water Science and Technology   Check publisher's open access policy
ISSN 0273-1223
Publication date 2008-01-01
Year available 2008
Sub-type Article (original research)
DOI 10.2166/wst.2008.106
Open Access Status DOI
Volume 57
Issue 4
Start page 465
End page 469
Total pages 5
Editor Olsson, G.
Place of publication United Kingdom
Publisher I W A Publishing
Language eng
Subject C1
0907 Environmental Engineering
969999 Environment not elsewhere classified
Abstract Crystalline cellulose was anaerobically degraded using a leachate inoculum derived from simulated municipal solid waste. Bicinchoninic Acid (BCA) protein assays were used to measure the distribution of biomass during cellulose degradation, including the planktonic and sessile biomass fractions. A comparison of sessile and planktonic microbial growth indicated that the microbial growth was dominated by the planktonic fraction with the biofilms accounting for approximately 25% of the population. Additional biomass measurements were conducted to test the reliability of the BCA protein assays. Total microbial growth was inferred from the accumulation and depletion of ammonia nitrogen measured using flow injection analysis. The planktonic biomass was estimated from direct cell counts using light microscopy and the sessile biomass was estimated by analysing the nitrogen content of the separated and washed cellulose pellet. Regression analysis showed good correlations between the measurement pairs representing the total biomass (R2=0.90), planktonic biomass (R2=0.97) and sessile biomass (R2=0.85), supporting the use of protein assays as an indicator of microbial growth in mixed culture environments.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

 
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Created: Fri, 17 Apr 2009, 01:35:37 EST by Gail Smith on behalf of Advanced Water Management Centre