title: Phosphorus limitation on bacterial regrowth in drinking water.
abstract: Assimilable organic carbon (AOC) test and bacterial regrowth potential (BRP) analysis were used to investigate the effect of phosphorus on bacterial regrowth in the drinking water that was made from some raw water taken from a reservoir located in northern China. It was shown that AOC of the drinking water samples increased by 43.9%-59.6% and BRP increased by 100%-235% when 50 microg/L PO4(3-)-P(as NaH2 PO4) was added alone to the drinking water samples. This result was clear evidence of phosphorus limitation on bacteria regrowth in the drinking water. This investigation indicated the importance of phosphorus in ensuring biological stability of drinking water and offered a novel possible option to restrict microbial regrowth in drinking water distribution system by applying appropriate technologies to remove phosphorus efficiently from drinking water in China.
authors.affiliation: Research Center for Environmental Engineering and Management, Shenzhen Graduate School, Tsinghua University, Shenzhen 518057, China. zhlysjq@netease.com
authors.forename: Jun-qiang
authors.initials: JQ
authors.lastname: Sang
authors.forename: Xi-hui
authors.initials: XH
authors.lastname: Zhang
authors.forename: Guo-zhong
authors.initials: GZ
authors.lastname: Yu
authors.forename: Zhan-sheng
authors.initials: ZS
authors.lastname: Wang
mesh_terms: D001419:Bacteria / Q000187:drug effects* / Q000254:growth & development*; D018533:Biomass; D002681:China; D010758:Phosphorus / Q000494:pharmacology*; D014867:Water / Q000032:analysis; D014871:Water Microbiology; D018508:Water Purification; D014881:Water Supply / Q000032:analysis*
chemical_list: D014867:Water; D010758:Phosphorus