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为研究石英砂滤料表面活性滤膜催化氧化地下水中氨氮的性能,采用已运行4年的中试石英砂滤柱,改变进水氨氮负荷并且长期持续过滤仅含氨氮的进水,考察该滤膜催化氧化氨氮的性能.结果表明:在进水氨氮浓度为0.8~1.3mg/L,水温为20~23℃,滤速为7m/h的试验条件下,滤料表面活性滤膜催化氧化氨氮的性能可长期保持稳定、高效;在溶解氧(DO)充足的条件下,氨氮的最大去除负荷为22.3g/(m3×h),且其与氨氮进水负荷正相关;氨氮的极限去除浓度受溶解氧的限制,且当DO不足时,滤速对溶解氧的消耗影响较大.
In order to study the catalytic oxidation of ammonia nitrogen in groundwater by the surface active membrane of quartz sand filter, the pilot-scale quartz sand filter column which has been in operation for 4 years was used to change the ammonia nitrogen load of influent water and continuously filter the influent water containing only ammonia nitrogen for a long time. Membrane catalytic oxidation of ammonia nitrogen.The results showed that under the experimental conditions of ammonia nitrogen concentration of influent of 0.8 ~ 1.3mg / L, water temperature of 20 ~ 23 ℃ and filtration speed of 7m / h, The maximum removal load of ammonia nitrogen is 22.3g / (m3 × h) under the condition of sufficient dissolved oxygen (DO), and it is positively correlated with the influent load of ammonia nitrogen; the limit removal concentration of ammonia nitrogen Limited by dissolved oxygen, and when DO is not enough, the filtration rate has a great influence on the consumption of dissolved oxygen.