湖水源热泵系统尾水排放对湖泊富营养化进程的影响研究  

Effect of tail-water of lake water source heat pump system on lake eutrophication process

作　　者：黄向阳[1,2] 周健[1] 

机构地区：[1]重庆大学三峡库区生态环境教育部重点实验室,重庆400030 [2]长江大学城市建设学院,荆州434023

出　　处：《环境工程学报》2010年第9期1945-1949,共5页Chinese Journal of Environmental Engineering

基　　金："十一五"国家科技支撑计划项目(2007BAB21B03-1)

摘　　要：以重庆市开县人民医院湖水源热泵工程为例,通过对该工程运行期间尾水受纳湖泊水域水温、氮、磷和浮游植物的长期监测,研究了湖水源热泵系统尾水对湖泊富营养化进程的影响。结果表明,夏季系统的长期运行导致了排放口附近水域水温的升高;当系统温排水水温在30℃以下时,温排水造成的温升使得排放口附近氮、磷含量升高,蓝、绿藻数量大幅增加,加速了湖泊的富营养化进程;当温排水水温达到33℃以上时,过高的温度会抑制藻类的生长。冷排水使湖泊排放口近水域浮游植物总量降低,且硅藻占总藻的比例增大,冷排水同时抑制了蓝藻和其他一些藻类的生长,对湖泊富营养化有一定缓解作用。但另一方面,由于温差较小,且冷排水的扰动作用加速了湖泊沉积物中营养盐的释放,因而冷排水对湖泊富营养化进程又有一定促进作用。Taking water source heat pump project in Kaixian People＇s Hospital of Chongqing City as the research example,by long-term monitoring research on the lake temperature,nitrogen,phosphorus,and phytoplankton, the effects of tail-water of lake water source heat pump system on lake eutrophication process were studied.The results show that long time operation of the system leads to water temperature increasing near outfall in summer.When thermal discharge of system is below 30 ℃,the rise of water temperature makes the content of nitrogen and phosphorus higher and green algae and blue algae increase sharpply.It accelerates eutrophication process of the lake;when thermal discharge of system is beyond 33 ℃,too high temperature inhibits the growth of algae.Cold discharge decreases total phytoplankton of water area near outfall,and it makes the proportion of diatom increasing in total quantity of algaes.It also limits the growth of blue algae and some other algaes.So cold discharge has a slowdown function for the lake eutrophication process.However,on the other hand,because of low temperature difference and the agitation of cold discharge which accelerate nutrient＇s release of lake sediments,it promotes the lake eutrophication process on the other hand.

关 键 词：水源热泵 尾水 湖泊 富营养化 

分 类 号：X524[环境科学与工程—环境工程]