Biological pretreatment of Yellow River water |
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Authors: | XIE Shu-guang TANG Xiao-yan WU Wei-zhong WEN Dong-hui and WANG Zhan-sheng |
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Institution: | 1. Department of Environmental Sciences, College of Environmental Sciences, Peking University, Beijing 100871, China 2. Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China |
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Abstract: | 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 UV_ 254 , the average removal rate of THMFP in the BF was much higher than that in the MBBR. UV_ 254 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. |
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Keywords: | bio-ceramic filter(BF) moving-bed biofilm reactor(MBBR) Yellow River biological pretreatment |
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