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| Effect of phosphorus release from iron pipe wall on biostability in water distribution system. |
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Abstract In order to study the phosphorus release from the cement-lined pipe and its implication for biostability of drinking water, a new and an old cement lined iron pipe were applied to study the content of phosphorus in cement liner and iron pipe, phosphorus release to the water and variation of assimilable organic carbon(AOC), heterotrophic plate counts(HPC) and microbial available phosphorus(MAP) in pipe water. Existence of phosphorus and many other trace elements for microbial regrowth was observed. Both kinds of iron pipes could release microbial available phosphorus into the water while the old pipe could release more phosphorus than the new one. AOC and HPC in the old pipe were higher than those in the new pipe. The new pipe obviously influenced pH value in the water, but the influence was gradually weakened.
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Received: 15 July 2008
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CHEN Huan-Yu, LIU Jing-Qing, WEI Zong-Yuan, ZHANG Hui-Hui, HE Xiao-Fang, ZHOU Xiao-Yan, QIU Shang-De, HU Bao-Lan, LOU Li-Ping. Radial differences in contaminant distribution in large-diameter pipe scales of main pipelines in drinking water distribution system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(9): 2706-2712. |
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