铁碳微电解串联天然沸石去除黑臭水体中的总氮

Removal of totalnitrogen from black-smelly water by series natural zeolite reaction column with iron-carbon microelectrolysis

采用铁碳微电解串联天然沸石技术,研究了去除黑臭水体中总氮的问题.结果表明:(1)通过静态实验确定的最佳处理设计为,进水pH=3,m(Fe)/m(C)比为2∶1,铁碳微电解反应层水力停留时间为120 min,沸石层水力停留时间为40 min,反应柱总的水力停留时间为160 min.(2)动态实验中NH_(4)^(+),NO_(3)^(-)和TN去除率分别保持95%,92%和90%左右,可持续处理300 h以上.(3)中试实验中TN,NO_(3)^(-)和NH_(4)^(+)的平均去除率分别为83.04%,91.85%和88.60%,TP和COD的平均去除率分别为83.2%和89.7%.

The technology of using iron carbon micro electrolysis in series with natural zeolite is used to remove total nitrogen from black and odorous water bodies.The results showed that:(1)The static experiment determined that the influent pH was 3,the iron carbon ratio was 2∶1,the hydraulic retention time of the iron carbon micro electrolysis reaction layer was 120 minutes,the hydraulic retention time of the zeolite layer was 40 minutes,and the total hydraulic retention time of the reaction column was 160 minutes.(2)In the dynamic experiment,the removal rates of NH_(4)^(+),NO_(3)^(-),and TN were maintained at around 95%,92%,and 90%,respectively,and could be continuously treated for more than 300 hours.(3)The average removal rates of TN,NO_(3)^(-),and NH_(4)^(+)in the pilot experiment were 83.04%,91.85%,and 88.60%,respectively.The average removal rates of TP and COD were 83.2%and 89.7%,respectively.