扬水曝气技术对周村水库藻类的控制  

Algae control by water-lifting aerator in Zhoucun reservoir

作　　者：黄廷林[1] 朱倩[1] 邱晓鹏[1] 史建超[1] 周石磊[1] 曾明正[1] 

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055

出　　处：《环境工程学报》2017年第4期2255-2260,共6页Chinese Journal of Environmental Engineering

基　　金：国家科技支撑计划项目(2012BAC04B02)

摘　　要：扬水曝气作为湖泊、水库水体修复技术之一,在国内多个水源水库水质改善工程中得到应用。为进一步研究扬水曝气技术对湖库藻类的控制效果及其机理,在对北方温带季节性分层水库-周村水库垂向水体的理化指标及藻类参数进行常年监测的基础上,于2015年8月—9月扬水曝气运行前后对垂向水体理化指标及浮游植物生物量、群落结构及丰度进行了连续监测和对比分析。结果表明,扬水曝气破坏了水体分层,藻类生物量锐减,多样性水平提高,藻类密度垂向差异消失,优势种群由威胁性较大的蓝藻、绿藻变为威胁性较小的硅藻,水体生态状况良好。扬水曝气系统对氮营养盐含量、热分层结构和光照条件的影响是促进了藻类群落结构改变的主要原因。Aeration,which is a type of water quality rehabilitation technology often used to control algae,has been applied to multiple water quality improvement projects in water source reservoirs. Here,investigations on the vertical distribution of phytoplankton and physical-chemical parameters were conducted during aeration treatment in the Zhoucun reservoir,which is located in the northern temperate climatic region of China. Aerators were operated at the end of August 2015. The water quality index,phytoplankton biomass,and community structure and abundance were compared before and after the aeration operation. The results showed that with aeration,stratification was destroyed and the phytoplankton displayed a more homogeneous vertical distribution throughout the water column. Meanwhile,the level of algal diversity increased and algal biomass decreased. After aeration,the dominant species of phytoplankton consisted of diatoms,which are typically less harmful in terms of the water quality. Overall,good ecological conditions were detected at Zhoucun reservoir,and the effect of aerator operation on nutrient dynamics,the thermal stratification structure,and light conditions were the main reasons for the change in the community structure.

关 键 词：扬水曝气 藻类 热分层 群落结构 藻类多样性 

分 类 号：X524[环境科学与工程—环境工程]