换水周期对直流河道藻类生长的影响  

IMPACT OF HYDRAULIC RETENTION TIME ON THE GROWTH OF ALGAE IN STRAIGHT CHANNELS

作　　者：黄鹏 田腾飞 张文安 秦松岩[1] HUANG Peng;TIAN Teng-fei;ZHANG Wen-an;QIN Song-yan(College of Environmental Science and Safety Engineering,Tianjin University of Technology,Tianjin 300380,China;North China Municipal Engineering Design and Research Institute Co.,Ltd,Tianjin 300074,China)

机构地区：[1]天津理工大学环境科学与安全工程学院,天津300380 [2]中国市政工程华北设计研究总院有限公司,天津300074

出　　处：《环境工程》2018年第7期22-26,共5页Environmental Engineering

基　　金：水体污染控制与治理科技重大专项(2017ZX07403001)

摘　　要：在以再生水为补水源的景观水体中,探究使藻类处于生消平衡而不产生水华的平衡换水周期,可为景观水体中的缓流区域提供水力解决方案。基于合肥环城水系的状况,通过建造直流河道模拟不同再生水补水量时的水力流态、停留时间,考察不同换水周期对藻类生长的影响。确定直流模拟河道的平衡换水周期为9d。说明藻类在暴发性生长因素都存在的情况下,运用换水周期来抑制藻类生长的方法是可行的,而且河道的平衡换水周期是存在的。通过调节水体换水周期来抑制藻类生长的这一方法可推广到整个合肥环城水系中,从而抑制环城水系中水华的产生。The purpose of this paper was to explore the hydraulic retention time（ HRT）,which could inhibit the growth of algae and the occurrence of bloom in the landscape water with reclaimed water as the supplementary water source,so that it could provide solutions for the slow flow velocity region. Based on the condition of the inner city circling landscape water system of Hefei,the impact of algae growth was observed by constructing a pilot scale straight channel which could simulate hydraulic flow state and HRT of different reclaimed water. It was confirmed that the equilibrium hydraulic retention time（ EHRT） of straight simulated channel was 9 d. The results indicated that EHRT of the channel existed and it was feasible to control algal growth by regulating HRT when all the factors of algal bloom were satisfied. By detecting the corresponding EHRT,the method of inhibiting algal growth by regulating HRT could be applied to the inner city circling landscape water treatment.

关 键 词：平衡换水周期 藻类 景观水体 直流河道 

分 类 号：X173[环境科学与工程—环境科学] X52