河岸渗滤对不同工艺再生水补给景观水的处理功效

分别采用"二级出水+O3+GFH"和"二级出水+DNBF"两种不同工艺再生水补给人工湖,河岸渗滤(简称BF)作为净化再生水补给人工湖后的维护工艺,分析BF对人工湖中污染物的去除机制。结果表明:以"二级出水+O3+GFH"工艺出水作为人工湖补水,BF对NH4+-N、NO2--N、DOC的去除效率分别为85.1%、52.0%、22.5%。以"二级出水+DNBF"工艺出水作为人工湖补水,BF对NH4+-N、NO2--N、DOC的去除效率分别为64.4%、62.0%、26.4%。人工湖NH4+-N越高,水体中充分富氧,BF砂坝内硝化作用越强,BF对NH4+-N的去除率越高,可有效抑制蓝藻的暴发。

STUDY ON TREATMENT EFFICACY OF LANDSCAPE LAKE RECHARGED BY RECLAIMED WATER WITH DIFFERENT PROCESSES DURING BANK FILTRATION

In this study,"municipal secondary effluent +ozonation + GFH" and "municipal secondary effluent + DNBF" were used as reclaimed water treatment processes to supply landscape lake respectively,while bank filtration was used as landscape quality maintenance technology,then the removal mechanisms of pollutants in the landscape lake by BF was studied.The result showed that the removal rates of NH+4-N,NO-2-N and DOC were 85.1%,52.0% and 22.5% respectively by BF,when the effluent of "municipal secondary effluent+ozonation+GFH" process was as replenishment of landscape lake.The removal rates of NH+4-N,NO-2-N and DOC were 64.4%,62.0% and 26.4% respectively by BF,when the effluent of "municipal secondary effluent+DNBF" process was as replenishment of landscape lake.The higher NH+4-N concentration and the higher the fully oxygen-rich in landscape lake,the stronger nitrification during BF dam,the higher the removal rate of NH+4-N by BF.BF could effectively inhibit the outbreak of blue algae.