PMID- 21528583
OWN - NLM
STAT- MEDLINE
DCOM- 20110930
LR  - 20161018
IS  - 0250-3301 (Print)
IS  - 0250-3301 (Linking)
VI  - 32
IP  - 2
DP  - 2011 Feb
TI  - [Bioaugmented treatment of atrazine by genetically engineered microorganism in 
      different bioreactors].
PG  - 554-9
AB  - Removal of atrazine was investigated when genetically engineered microorganism 
      (GEM) was inoculated into membrane bioreactor (MBR) and hybrid bioreactor for 
      bioaugmentation. The performances of atrazine removal in two bioreactors were 
      explored. The variations of GEM density and atzA gene abundance in two 
      bioreactors were also determined. The results indicated that removal activities 
      of COD and ammonia nitrogen were inhibited a little by atrazine and recovered 
      after bioaugmentation by inoculated GEM. The better removal performance of COD 
      and ammonia nitrogen was obtained in MBR. The biological removal efficiency of 
      atrazine was improved significantly when bioaugmented treatment by GEM was 
      applied. The atrazine removal increased gradually and the average removal rates 
      reached up to 38.94% in MBR and 29.36% in hybrid bioreactor in the later running 
      period. After inoculated, GEM densities in two bioreactors decreased rapidly and 
      then tended to be constant. The stable GEM densities in MBR, suspended sludge and 
      adherent biofilm of hybrid bioreactor were 5 x 10(3) CFU/mL, 1.1 x 10(3) CFU/mL 
      and 0.4 x 10(3) CFU/mL, respectively. Fluorescence in situ hybridization (FISH) 
      was used to detect azA gene in two bioreactors and the result indicated that the 
      average relative abundances of atzA gene decreased initially and increased 
      subsequently. The largest average relative abundance of atzA gene was obtained in 
      MBR. The average relative abundance of atzA gene in adherent biofilm is larger 
      than that in suspended sludge in the hybrid bioreactor. The horizontal transfer 
      of atzA gene was the possible important reason responsible for high gene 
      abundance.
FAU - Guo, Yuan-Ming
AU  - Guo YM
AD  - School of Environmental Science and Engineering, Hebei University of Science and 
      Technology, Shijiazhuang 050018, China. kirkgym@163.com
FAU - Liu, Chun
AU  - Liu C
FAU - Guo, Ya-Nan
AU  - Guo YN
FAU - Yang, Jing-Liang
AU  - Yang JL
FAU - Li, Liang
AU  - Li L
FAU - Ma, Jun-Ke
AU  - Ma JK
LA  - chi
PT  - English Abstract
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - China
TA  - Huan Jing Ke Xue
JT  - Huan jing ke xue= Huanjing kexue
JID - 8405344
RN  - 0 (Herbicides)
RN  - QJA9M5H4IM (Atrazine)
SB  - IM
MH  - Atrazine/*isolation & purification/metabolism
MH  - Bacteria/*genetics/metabolism
MH  - Biodegradation, Environmental
MH  - Bioreactors/*microbiology
MH  - Herbicides/isolation & purification/metabolism
MH  - Industrial Microbiology
MH  - *Organisms, Genetically Modified
MH  - Waste Disposal, Fluid/*methods
EDAT- 2011/05/03 06:00
MHDA- 2011/10/01 06:00
CRDT- 2011/05/03 06:00
PHST- 2011/05/03 06:00 [entrez]
PHST- 2011/05/03 06:00 [pubmed]
PHST- 2011/10/01 06:00 [medline]
PST - ppublish
SO  - Huan Jing Ke Xue. 2011 Feb;32(2):554-9.