Department of Environmental Science, Northeast Forestry University, Harbin 150040, China.
Department of Environmental Science, Northeast Forestry University, Harbin 150040, China.
J Environ Sci (China). 2016 Jul;45:1-6. doi: 10.1016/j.jes.2015.11.027. Epub 2016 Feb 23.
This study investigated the chlorination of Microcystis aeruginosa extracellular organic matter (EOM) solutions under different conditions, to determine how the metabolites produced by these organisms affect water safety and the formation of assimilable organic carbon (AOC). The effects of chlorine dosages, coagulant dosage, reaction time and temperature on the formation of AOC were investigated during the disinfection of M.aeruginosa metabolite solutions. The concentration of AOC followed a decreasing and then increasing pattern with increasing temperature and reaction time. The concentration of AOC decreased and then increased with increasing chlorination dosage, followed by a slight decrease at the highest level of chlorination. However, the concentration of AOC decreased continuously with increasing coagulant dosage. The formation of AOC can be suppressed under appropriate conditions. In this study, chlorination at 4mg/L, combined with a coagulant dose of 40mg/L at 20°C over a reaction time of 12hr, produced the minimum AOC.
本研究调查了不同条件下铜绿微囊藻细胞外有机物质（EOM）溶液的氯化情况，以确定这些生物产生的代谢物如何影响水安全和可同化有机碳（AOC）的形成。在消毒铜绿微囊藻代谢物溶液时，考察了氯剂量、混凝剂剂量、反应时间和温度对 AOC 形成的影响。AOC 的浓度随温度和反应时间的增加呈先减少后增加的趋势。AOC 的浓度随氯化剂量的增加而先减少后增加，随后在最高氯化水平下略有下降。然而，AOC 的浓度随混凝剂剂量的增加而持续下降。在适当的条件下可以抑制 AOC 的形成。在本研究中，在 20°C 下反应 12 小时，氯剂量为 4mg/L，同时投加 40mg/L 的混凝剂，可产生最小的 AOC。
