人工渗滤系统对海水养殖废水中氮素的去除

人工渗滤系统以其建设费用低、管理运行方便、脱氮效果好等优势受到人们的普遍关注。该实验以海水养殖废水为处理对象,对人工渗滤系统的运行条件和氮素去除情况进行了研究。结果表明,水力负荷、水力运行周期和保水段高度对氮素的去除均有影响但影响各不相同。当水力负荷为20 cm³/(cm3/(cm²·d),运行周期为6 h/6 h时,总氮和氨氮的去除率较高,分别达到54.88%和89.69%,而硝态氮和亚硝态氮浓度保持稳定。提高保水段高度后,厌氧段得到扩充,在此条件下,氨氮的去除率基本保持不变,而总氮、硝态氮和亚硝态氮去除率明显升高。

Removal of Nitrogen from Mariculture Wastewater by Artificial Filtration System

Artificial filtration system has drawn the widespread concern for its advantage of lower construction cost, convenient management and effective denitrification.Operational condition and nitrogen removal efficiency based on mariculture wastewater were studied.Results showed that hydrauUc loading,hydraulic running cycle and saturated water height had different effects on nitrogen removal efficiency.Total nitrogen and ammonia nitrogen reached higher removal rate of 54.88%and 89.69%respectively companying with stable nitrate and nitrite concentration when hydrauUc loading and hydraulic running cycle were 20cm~3/(cm~2·d) and 6h/6h respectively.Anaerobic zone was extended after enhancing the saturated water height and in such case,ammonia nitrogen concentration maintained stable whereas the removal rate of total nitrogen,nitrate and nitrite were all obviously rising.