Biological pretreatment of Yellow River water.
Bio-ceramic filter(BF) and moving-bed biofilm reactor (MBBR) were used for biological pretreatment of Yellow River water in this study. The BF only had slight advantage over MBBR for TOC and ammonia removal. However, like UV254, the average removal rate of THMFP in the BF was much higher than that in the MBBR. UV254 removal did not show obvious correlation with trihalomethane formation potential (THMFP) removal. Hexachlorocyclohexane could be effectively removed in both BF and MBBR. As for diatom and cyanobateria removal the MBBR had better performance than the BF, which was contrary to the average chlorophyll-a ( Chl-a) removal rate. The proposal was made in this study that biological flocculation and sedimentation of sloughed biofilm should play a more important role on algae removal in the MBBR than in the BF. The BF and MBBR could effectively remove microcystins. Moreover, MBBR could be a promising technology for biological pretreatment.
Xie
Shu-Guang
SG
Department of Environmental Sciences, College of Environmental Sciences, Peking University, Beijing 100871, China. xiesg@pku.edu
Tang
Xiao-Yan
XY
Wu
Wei-Zhong
WZ
Wen
Dong-Hui
DH
Wang
Zhan-Sheng
ZS
D000641:Ammonia / Q000302:isolation & purification; D018441:Biofilms; D019149:Bioreactors; D002681:China; D002734:Chlorophyll / Q000302:isolation & purification; D000077194:Chlorophyll A; D056890:Eukaryota / Q000302:isolation & purification; D052998:Microcystins; D009566:Nitrates / Q000302:isolation & purification; D010456:Peptides, Cyclic / Q000302:isolation & purification; D045483:Rivers; D014874:Water Pollutants, Chemical
D052998:Microcystins; D009566:Nitrates; D010456:Peptides, Cyclic; D014874:Water Pollutants, Chemical; D002734:Chlorophyll; D000641:Ammonia; C078588:microcystin; D000077194:Chlorophyll A