温度对生物炭滤池处理高氨氮原水硝化的影响

Influence of temperature on treating nitrification of high ammonia nitrogen source water in biological carbon filter.

利用臭氧预氧化-生物预处理-混凝沉淀-砂滤-臭氧后氧化-生物活性炭滤池组合工艺对微污染水源水进行了深度处理中间试验.将一部分未经生物预处理的高氨氮原水经常规处理后进入生物活性炭滤池以提高活性炭滤池进水氨氮浓度.研究了温度对高氨氮进水条件下生物活性炭滤池硝化能力的影响.试验表明,生物活性炭(BAC)的生物活性随温度的降低而降低.在水温2℃左右时,生物活性炭滤池对氨氮的去除能力相当于6℃以上时去除能力的50%;在温度>6℃的条件下,生物活性炭滤池对氨氮的去除能力在进水溶解氧基本相同时不随温度(水温>6℃)的变化而发生变化,对氨氮的去除能力主要受水中溶解氧的影响.

A deep treatment pilot test was made on micropolluted source water with combined technique of O3 preoxidizing biological pretreatment-coagulant sedimentation-sand filter-O3 after oxidizing biological activated carbon (BAC) filter. A part of high NH4+-N source water not biological treated was fed into BAC filter after conventional treatment to enhance the NH4+-N concentration of BAC filter influent water. The influence of temperature on nitrification ability of BAC filter under the condition of high NH4+-N influent water was studied. The text showed that the bio-activity of BAC was reduced with the decline of temperature; and NH4+-N removal ability in BAC filter at about 2℃ corresponded to 50% of the ability above 6℃. At the condition of temperature >6℃, the ability did not change with temperature when the dissolved oxygen (DO) was basically same in the influent water; and the ability was influenced mainly by the DO in the water.