Potential of Novel Halotolerant and Psychrotrophic Strain of Planococcus sp. for Water Treatment  

作　　者：Kai Wang Siqi Li Xiquan Cheng Yingjie Zhang Peisheng Yan Jun Ma 

机构地区：[1]School of Marine Science and Technology,Harbin Institute of Technology [2]School of Municipal and Environmental Engineering,Harbin Institute of Technology

出　　处：《Journal of Harbin Institute of Technology(New Series)》2018年第5期24-32,共9页哈尔滨工业大学学报（英文版）

基　　金：Sponsored by Foundation for Outstanding Young Scientist in Shandong Province(Grant No.BS2014NY012);China Postdoctoral Science Foundation(Grant No.2015M581456);Weihai Major Science and Technology Projects(Grant No.2015ZD08)

摘　　要：To screen multifunctional bacteria for water treatment,a chemical oxygen demand( COD)degradation and flocculation strain S2 A15 was obtained from the offshore sewage outfall at Weihai International Beach. Based on the phylogenetic characteristics,a novel strain was identified as a Planococcus species. Strain S2 A15 was determined to have the ability of flocculation and COD degradation. A series of experiments showed that the strain S2 A15 could be used for the treatment of four types of wastewater,including domestic wastewater( 400 mg/L and 800 mg/L) and high salt domestic wastewater( 400 mg/L and 800 mg/L). Among them,the best effect was exerted by the strain that reduced by 76.9% in domestic wastewater with 400 mg/L COD. The flocculation ratio reached 60.19%. The optimal treatment conditions are also discussed. We confirmed that the strain S2 A15 had salt tolerance and low temperature resistance. The best growth of S2 A15 at salt concentration of 6% and further confirmed that the strain could degrade COD at a low temperature.To screen multifunctional bacteria for water treatment,a chemical oxygen demand( COD)degradation and flocculation strain S2 A15 was obtained from the offshore sewage outfall at Weihai International Beach. Based on the phylogenetic characteristics,a novel strain was identified as a Planococcus species. Strain S2 A15 was determined to have the ability of flocculation and COD degradation. A series of experiments showed that the strain S2 A15 could be used for the treatment of four types of wastewater,including domestic wastewater( 400 mg/L and 800 mg/L) and high salt domestic wastewater( 400 mg/L and 800 mg/L). Among them,the best effect was exerted by the strain that reduced by 76.9% in domestic wastewater with 400 mg/L COD. The flocculation ratio reached 60.19%. The optimal treatment conditions are also discussed. We confirmed that the strain S2 A15 had salt tolerance and low temperature resistance. The best growth of S2 A15 at salt concentration of 6% and further confirmed that the strain could degrade COD at a low temperature.

关 键 词：COD FLOCCULATION wastewater treatment Planococcus sp. salt-tolerant bacteria 

分 类 号：X56[环境科学与工程—环境工程]