人工快速渗滤系统处理含盐生活污水可行性初探

Preliminary Investigation on Saline Sanitary Sewage Treatment by a Constructed Rapid Infiltration System

将人工快速渗滤系统（CRI）应用于处理含盐生活污水，考察了不同进水盐度下CRI系统的运行效果及脱氮微生物的空间分布特征。结果表明，进水盐度（NaCl的质量分数）在0．75％及以下时，COD、NHg-N去除效果受盐度影响较小，去除率分别保持在83％、90％VR上；进水盐度在0．5％及以下时，CRI系统对TN的去除率较不含盐时提高7～12．9个百分点，盐度对反硝。{二细菌的抑制作用强于硝化细菌、对亚硝酸盐氧化菌（NOB）的抑制作用强于氨氧化菌（AOB）；进水盐度对TP的去除影响不大，这与CRI系统除磷过程主要依靠填料吸附和化学沉淀有关。初步证明了采用CRI系统处理盐度在0．5％及以下的生活污水是可行的，该盐度还可作为CRI系统实现短程硝化的理想盐度。

The constructed rapid infiltration system （CRI） was used to treat saline sanitary sewage. The operation effect and denitrification microbe distribution characteristics under different salinity were studied. The results showed that the effects of salinity on COD and NH4＋-N removal were insignificant when the influent salinity （mass fraction of NaCl） was less than or equal to 0.75%. The removal rates were above 83% for COD and above 90% for NH4＋-N. TN removal rate increased from 7-12.9 percentage points when the influent salinity was less than or equal to 0.5%. The inhibition effect of salinity on denitrification bacteria was stronger than on nitrifcation bacteria, while the effect on NOB was stronger than on AOB. The influent salinity had little effect on TP removal since the phosphorus removal in CRI mainly depended on adsorption and chemical precipitation. It was proved that the saline sanitary sewage treatment by CRI was feasible if the salinity was less than or equal to 0.5%, and 0.5% could be used as the ideal salinity to achieve shortcut nitrification for CRI system.