| 滤速与水质对低温含铁锰氨地下水中氨去除的影响 |
| 摘要点击 1268 全文点击 498 投稿时间：2019-09-30 修订日期：2019-10-29 |
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| 中文关键词 低温 铁锰 硝化 全程自养脱氮(CANON) 滤速 浓度 |
| 英文关键词 low temperature iron and manganese nitrification completely autotrophic ammonium removal over nitrite (CANON) filter speed concentration |
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| 中文摘要 |
| 在某除铁锰氨氮地下水水厂，以中试滤柱开展了低温（6~8℃）生物除铁锰硝化耦合CANON［Fe（Ⅱ）2.91~6.35 mg·L-1、Mn（Ⅱ）0.47~0.98 mg·L-1和NH4+-N 1.15~2.26 mg·L-1］工艺运行实验，探究滤速与水质对氨氮去除的影响.结果表明，停运1个月的成熟低温铁锰氨生物滤柱以2 m·h-1的滤速经过40 d的培养，成功启动了低温生物除铁锰硝化耦合CANON工艺.在此工艺中当保持进水浓度不变，提升滤速会降低滤柱对氨氮的网捕效率，增加滤层深处的氨氮浓度，提高滤层深处AnAOB对氨氮离子的网捕效率，进而导致水中经CANON作用去除的氨氮增加，而硝化作用去除的氨氮降低；当保持滤速不变，提升进水氨氮浓度会使更高浓度的氨氮进入滤层，增加了氨氮和亚氮共存区域中氨氮的浓度，提高了滤层中AnAOB对氨氮离子的网捕效率，进而导致CANON作用去除的氨氮增加. |
| 英文摘要 |
| In a groundwater plant we carried out a process operation test of biological removal of iron and manganese nitrification coupled with completely autotrophic ammonium removal over nitrite (CANON) (Fe(Ⅱ) 2.91-6.35 mg·L-1, Mn(Ⅱ) 0.47-0.98 mg·L-1, NH4+-N 1.15-2.26 mg·L-1) at low temperature (6-8℃), to explore the effects of filter speed and water quality on ammonia nitrogen removal. The results showed that the mature low-temperature biological filter column, which had been out of service for one month, was cultured for 40 days at a filtration rate of 2 m·h-1 and successfully started. In this process, when the water inlet concentration remained the same, the improved filter speed would reduce the efficiency of ammonia nitrogen capture by the filter column, increase the concentration of ammonia nitrogen in the depth of the filter layer, and improve the efficiency of ammonia nitrogen ions capture by anaerobic ammonia oxidation bacteria (AnAOB) in the depth of the filter layer, so that the ammonia nitrogen removed by CANON in the water increased, while the ammonia nitrogen removed by nitrification decreased. When the filter speed remained unchanged, the concentration of ammonia nitrogen in water was increased to make the ammonia nitrogen with higher concentration enter the filter layer, which increased the concentration of ammonia nitrogen in the zone where ammonia nitrogen and nitrous nitrogen coexist, and improved the net catching efficiency of AnAOB on ammonia nitrogen ions in the filter layer, thus resulting in an increase in ammonia nitrogen removed by CANON. |
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