CAJ | 학술논문

针对高铁、高锰地下水中含有氨氮的问题,进行了生物除铁除锰过程中溶解氧需求及消耗规律的研究.结果表明:弱跌水曝气难以适应含氮地下水的净化对溶解氧的需求,在原水氨氮为1.2 mg/L、铁为15 mg/L、锰为1.5 mg/L左右的条件下,控制溶解氧>7.5 mg/L时,生物滤层才能培养成熟,出水锰离子浓度才能达标;过滤过程中溶解氧主要消耗在上部的45 cm滤层之内,用于铁的去除以及氨氮的硝化,下部除锰生物滤层能否得到充足的溶解氧是决定除锰成败的关键.
침대고철、고맹지하수중함유안담적문제,진행료생물제철제맹과정중용해양수구급소모규률적연구.결과표명:약질수폭기난이괄응함담지하수적정화대용해양적수구,재원수안담위1.2 mg/L、철위15 mg/L、맹위1.5 mg/L좌우적조건하,공제용해양>7.5 mg/L시,생물려층재능배양성숙,출수맹리자농도재능체표;과려과정중용해양주요소모재상부적45 cm려층지내,용우철적거제이급안담적초화,하부제맹생물려층능부득도충족적용해양시결정제맹성패적관건.
The demand and consumption of dissolved oxygen in the biological filtration for the removal of high concentration Fe and Mn from the groundwater containing ammonia nitrogen were studied. The results show that weak cascade aeration cannot provide adequate dissolved oxygen for the purification of the groundwater containing ammonia nitrogen. The dissolved oxygen should be maintained above 7.5 mg/L to culture the biofilter layer for manganese removal when ammonia nitrogen, Fe and Mn in the raw groundwater are 1.2 mg/L, 15 mg/L and 1.5 mg/L respectively. The dissolved oxygen is mostly consumed at the upper 45 cm of the filter for Fe removal and ammonia nitrogen nitrification. The residual dissolved oxygen concentration in the lower of the biofilter determines the result of the biological removal of manganese.