PMID- 20377173
OWN - NLM
STAT- MEDLINE
DCOM- 20100624
LR  - 20161125
IS  - 0013-936X (Print)
IS  - 0013-936X (Linking)
VI  - 44
IP  - 9
DP  - 2010 May 1
TI  - Waste activated sludge fermentation for hydrogen production enhanced by anaerobic 
      process improvement and acetobacteria inhibition: the role of fermentation pH.
PG  - 3317-23
LID - 10.1021/es902958c [doi]
AB  - In this study an efficient strategy, i.e., controlling the fermentation pH at 
      constant pH 10, for significantly increasing hydrogen yield from waste activated 
      sludge (WAS) via the improvement of anaerobic process (sludge solubilization, 
      hydrolysis, and acidification) and inhibition of hydrogen consumption by 
      acetobacteria was reported. Without addition of pure hydrogen producer and 
      nutrient source, the effect of different constant pH in the range of pH 4-11 on 
      hydrogen production from WAS was compared with that of different initial pH. The 
      maximal hydrogen yield was observed respectively at constant pH 10 and initial pH 
      10, but the former was 47.8% higher than the latter (26.9 versus 18.2 mL per gram 
      volatile suspended solids) and much greater than that reported in literature. 
      Then, the mechanisms for constant pH 10 resulting in remarkably higher hydrogen 
      production than initial pH 10 were investigated. It was observed that constant pH 
      10 fermentation showed much higher solubilization of sludge main particulate 
      organic matters, hydrolysis of solubilized organic materials and acidification of 
      hydrolyzed products, which were of benefit to the hydrogen production. Also, 
      there was more acetic but less propionic acid in the constant pH 10 test, which 
      was in correspondence with the theory of fermentation type affecting hydrogen 
      production. Moreover, in the reactor of initial pH 10 the produced hydrogen was 
      readily converted to acetic acid, but no obvious hydrogen consumption was 
      observed in constant pH 10 reactor. Further investigation of microorganisms with 
      enzymes analysis and fluorescence in situ hybridization (FISH) indicated that the 
      activity and growth of acetobacteria in the reactor of constant pH 10 was much 
      lower than those in initial pH 10 reactor.
FAU - Zhao, Yuxiao
AU  - Zhao Y
AD  - State Key Laboratory of Pollution Control and Resources Reuse, School of 
      Environmental Science and Engineering, Tongji University, Shanghai 200092, China. 
      yg2chen@yahoo.com
FAU - Chen, Yinguang
AU  - Chen Y
FAU - Zhang, Dong
AU  - Zhang D
FAU - Zhu, Xiaoyu
AU  - Zhu X
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Polysaccharides)
RN  - 0 (Propionates)
RN  - 0 (Sewage)
RN  - 7YNJ3PO35Z (Hydrogen)
RN  - JHU490RVYR (propionic acid)
SB  - IM
MH  - Acetobacterium/*metabolism
MH  - Anaerobiosis
MH  - Biodegradation, Environmental
MH  - Bioreactors
MH  - *Fermentation
MH  - Hydrogen/*chemistry
MH  - Hydrogen-Ion Concentration
MH  - Hydrolysis
MH  - In Situ Hybridization, Fluorescence
MH  - Models, Chemical
MH  - Polysaccharides/chemistry
MH  - Propionates/chemistry
MH  - *Sewage
MH  - Waste Disposal, Fluid/*methods
EDAT- 2010/04/10 06:00
MHDA- 2010/06/25 06:00
CRDT- 2010/04/10 06:00
PHST- 2010/04/10 06:00 [entrez]
PHST- 2010/04/10 06:00 [pubmed]
PHST- 2010/06/25 06:00 [medline]
AID - 10.1021/es902958c [doi]
PST - ppublish
SO  - Environ Sci Technol. 2010 May 1;44(9):3317-23. doi: 10.1021/es902958c.