PMID- 27267805
OWN - NLM
STAT- MEDLINE
DCOM- 20170719
LR  - 20180501
IS  - 1520-5851 (Electronic)
IS  - 0013-936X (Linking)
VI  - 50
IP  - 13
DP  - 2016 Jul 5
TI  - Polycyclic Aromatic Hydrocarbon Affects Acetic Acid Production during Anaerobic 
      Fermentation of Waste Activated Sludge by Altering Activity and Viability of 
      Acetogen.
PG  - 6921-9
LID - 10.1021/acs.est.6b00003 [doi]
AB  - Till now, almost all the studies on anaerobic fermentation of waste activated 
      sludge (WAS) for bioproducts generation focused on the influences of operating 
      conditions, pretreatment methods and sludge characteristics, and few considered 
      those of widespread persistent organic pollutants (POPs) in sludge, for example, 
      polycyclic aromatic hydrocarbons (PAHs). Herein, phenanthrene, which was a 
      typical PAH and widespread in WAS, was selected as a model compound to 
      investigate its effect on WAS anaerobic fermentation for short-chain fatty acids 
      (SCFAs) accumulation. Experimental results showed that the concentration of SCFAs 
      derived from WAS was increased in the presence of phenanthrene during anaerobic 
      fermentation. The yield of acetic acid which was the predominant SCFA in the 
      fermentation reactor with the concentration of 100 mg/kg dry sludge was 1.8 fold 
      of that in the control. Mechanism exploration revealed that the present 
      phenanthrene mainly affected the acidification process of anaerobic fermentation 
      and caused the shift of the microbial community to benefit the accumulation of 
      acetic acid. Further investigation showed that both the activities of key enzymes 
      (phosphotransacetylase and acetate kinase) involved in acetic acid production and 
      the quantities of their corresponding encoding genes were enhanced in the 
      presence of phenanthrene. Viability tests by determining the adenosine 
      5'-triphosphate content and membrane potential confirmed that the acetogens were 
      more viable in anaerobic fermentation systems with phenanthrene, which resulted 
      in the increased production of acetic acid.
FAU - Luo, Jingyang
AU  - Luo J
AD  - State Key Laboratory of Pollution Control and Resources Reuse, School of 
      Environmental Science and Engineering, Tongji University , 1239 Siping Road, 
      Shanghai 200092, China.
FAU - Chen, Yinguang
AU  - Chen Y
AD  - State Key Laboratory of Pollution Control and Resources Reuse, School of 
      Environmental Science and Engineering, Tongji University , 1239 Siping Road, 
      Shanghai 200092, China.
FAU - Feng, Leiyu
AU  - Feng L
AD  - State Key Laboratory of Pollution Control and Resources Reuse, School of 
      Environmental Science and Engineering, Tongji University , 1239 Siping Road, 
      Shanghai 200092, China.
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20160614
PL  - United States
TA  - Environ Sci Technol
JT  - Environmental science & technology
JID - 0213155
RN  - 0 (Fatty Acids, Volatile)
RN  - 0 (Polycyclic Aromatic Hydrocarbons)
RN  - 0 (Sewage)
RN  - Q40Q9N063P (Acetic Acid)
SB  - IM
MH  - Acetic Acid
MH  - Fatty Acids, Volatile/biosynthesis
MH  - *Fermentation
MH  - Polycyclic Aromatic Hydrocarbons
MH  - *Sewage
EDAT- 2016/06/09 06:00
MHDA- 2017/07/20 06:00
CRDT- 2016/06/09 06:00
PHST- 2016/06/09 06:00 [entrez]
PHST- 2016/06/09 06:00 [pubmed]
PHST- 2017/07/20 06:00 [medline]
AID - 10.1021/acs.est.6b00003 [doi]
PST - ppublish
SO  - Environ Sci Technol. 2016 Jul 5;50(13):6921-9. doi: 10.1021/acs.est.6b00003. Epub 
      2016 Jun 14.