Population dynamics in bioaugmented membrane bioreactor for treatment of bromoamine acid wastewater.
The performances and microbial population changes in laboratory-scale membrane bioreactor (MBR) augmented with Sphingomonas xenophaga QYY were investigated in the present study. It was demonstrated that after 30 days acclimation, the non-augmented MBR system were able to degrade bromoamine acid (BAA) well. However, the efficiency of the system decreased with BAA concentration increasing. While the augmented MBR showed higher capability, in which the color and COD removal were more than 90% and 50%, respectively. By ribosomal intergenic spacer analysis (RISA), it was found that BAA-utilizing populations gradually increased to become the dominant species in the non-augmented MBR. However, the augmented MBR possessed relatively stable treatment abilities, in which the introduced strain QYY could be persistent and co-exist well with the indigenous populations.
Qu
Yuan-Yuan
YY
Key Laboratory of Industrial Ecology and Environmental Engineering, MOE, School of Environmental and Biological Science and Technology, Dalian University of Technology, Dalian, PR China. yuanyuanqu@yahoo.cn
Zhou
Ji-Ti
JT
Wang
Jing
J
Xing
Lin-Lin
LL
Jiang
Nan
N
Gou
Min
M
Salah Uddin
M
M
D001673:Biodegradation, Environmental; D019149:Bioreactors / Q000382:microbiology*; D002452:Cell Count; D003198:Computer Simulation; D007220:Industrial Waste / Q000517:prevention & control*; D008567:Membranes, Artificial; D008954:Models, Biological; D013045:Species Specificity; D020578:Sphingomonas / Q000145:classification / Q000254:growth & development / Q000302:isolation & purification* / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
D007220:Industrial Waste; D008567:Membranes, Artificial