Nutrient Limiting Biofouling Formation in Recirculating Cooling Water System

摘要：

Understanding the contribution of nutrient levels to biofouling control is important requirement for management strategies in the recirculating cooling water system. Nutrient limitation may be one way to control biofouling development without increasing biocides dosing. Therefore, this study was carried out to investigate the effects of nutrient levels on biofouling control in the recirculating cooling water system. The biofouling characteristics were assessed by means of carbohydrate and protein contents in extracellular polymeric substances, variation of biofouling mass and bacteria respiratory activity. The results indicate that the concentrations of carbon, nitrogen and phosphorus in the cooling water have the significant effects on biofouling control and controlling nutrient levels can lengthen the biofouling initial growth period. According to the results obtained in nutrient factor experiments, the biofouling can be better controlled at the glucose, nitrogen and phosphorus concentrations of 30 mg·L-1, 6-8 mg N·L-1 and 1.0 mg P·L-1, respectively. In practice, controlling nutrient levels may be a potential candidate for reducing biofouling formation and development in the recirculating cooling water system.

关键词： Nutrient eztracellular polymeric substance biofouling mass ozygen utilization rate recirculating cooling water system

作者: LIU Fang ZHAO Chaocheng XIA Lu ZHANG Guizhi HOU Yanmei

作者单位: College of Chemistry and Chemical Engineering,China University of Petroleum,Qingdao 266555,Shandong,China

会议类型: 国际会议

会议名称: 2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)

会议地点: 上海

会议语种:英文

页码: 482-486

在线出版日期: 2009-06-02（万方平台首次上网日期，不代表论文的发表时间）