基于生物膜技术的城市污水脱氮技术研究
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摘要
采用人工模拟城市污水,设定曝气生物滤池的水力停留时间为25 min,水温为12℃～26℃,PH为6. 8～8. 2条件下,对3种填料曝气生物滤池的挂膜过程及其氨氮去除效果进行了实验分析,实验结果表明,进水总氨氮浓度保持在0. 08 mg/L-0. 11 mg/L时,出水总氨氮浓度保持在0. 058 mg/L～0. 10 mg/L,氨氮去除率可达到88%～96%;当氨氮负荷逐渐增大时,氨氧化细菌和亚硝酸氧化细菌数量逐渐增加,并到一定数值时保持稳定,氨氮去除效率较高且较为稳定;当水温保持在16℃～26℃之间时,氨氮去除率较高; PH值为6时,去除率为62%,p H值在7. 0～8. 2区间时,去除率最高可达到79%之间。该技术具有较好的城市污水脱氮和有机物去除能力。
Taking artificially simulated urban sewage as the sample,treatment condition is set at hydraulic retention time of the biological aerated filter is 25 min,the water temperature is 12℃ ～ 26℃,and the p H is 6. 8 ～ 8. 2. The ammonia nitrogen removal effect was analyzed experimentally. The experimental results show that when the total ammonia nitrogen concentration in the influent is maintained at 0. 08 mg/L ～ 0. 11 mg/L,the total ammonia nitrogen concentration in the effluent is maintained at 0. 058mg/L ～ 0. 10 mg/L,and the ammonia nitrogen removal rate can reach 88% ～ 96%. When the ammonia nitrogen load increases gradually,the number of ammonia-oxidizing bacteria and nitrous acid-oxidizing bacteria gradually increases,and it remains stable at a certain value,and the ammonia nitrogen removal efficiency is relatively high and stable when the water temperature is maintained at 16℃. The ammonia nitrogen removal rate is higher between-26℃; the removal rate is 62% when the p H is 6,and the removal rate is up to 79% when the p H is between 7. 0 and 8. 2. The technology has good denitrification and organic matter removal capacity of urban sewage.
Taking artificially simulated urban sewage as the sample,treatment condition is set at hydraulic retention time of the biological aerated filter is 25 min,the water temperature is 12℃ ～ 26℃,and the p H is 6. 8 ～ 8. 2. The ammonia nitrogen removal effect was analyzed experimentally. The experimental results show that when the total ammonia nitrogen concentration in the influent is maintained at 0. 08 mg/L ～ 0. 11 mg/L,the total ammonia nitrogen concentration in the effluent is maintained at 0. 058mg/L ～ 0. 10 mg/L,and the ammonia nitrogen removal rate can reach 88% ～ 96%. When the ammonia nitrogen load increases gradually,the number of ammonia-oxidizing bacteria and nitrous acid-oxidizing bacteria gradually increases,and it remains stable at a certain value,and the ammonia nitrogen removal efficiency is relatively high and stable when the water temperature is maintained at 16℃. The ammonia nitrogen removal rate is higher between-26℃; the removal rate is 62% when the p H is 6,and the removal rate is up to 79% when the p H is between 7. 0 and 8. 2. The technology has good denitrification and organic matter removal capacity of urban sewage.
引文
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[3]阮晓卿,吴如杰,王英惠,等.湘乡皮革工业园污水厂提质改造及脱氮分析[J].中国皮革,2016,45(5):17-19.
[4]项文琪,李孟,杨江涛,等.好氧反硝化菌对高氨氮工业废水脱氮的研究[J].武汉理工大学学报,2016,38(1):65-69.
[5]于德爽,周同,李津,等. p H冲击对海洋厌氧氨氧化菌处理含海水污水脱氮效能的影响[J].环境科学,2017,38(8):3369-3376.
[6]赵慧敏,李晓玲,赵剑强.微生物燃料电池在污水生物脱氮中的研究进展[J].化工进展,2016,35(4):1216-1222.
[7]刘玉田,张守彬,邱立平,等.污水生物脱氮过程硝化阶段N2O动力学模型[J].环境工程学报,2017,11(8):4601-4608.