Suppressing Nitrite-oxidizing Bacteria Growth to Achieve Nitrogen Removal from Domestic Wastewater via Anammox Using Intermittent Aeration with Low Dissolved Oxygen.
Suppressing Nitrite-oxidizing Bacteria Growth to Achieve Nitrogen Removal from Domestic Wastewater via Anammox Using Intermittent Aeration with Low Dissolved Oxygen.
复制标题
DOI：
10.1038/srep13048
复制
发表时间：
2015-09-10
影响因子：
4.6
通讯作者：
Peng Y
中科院分区：
文献类型：
--
作者：
Ma B;Bao P;Wei Y;Zhu G;Yuan Z;Peng Y
使用厌氧氨氧化（anammox）实现生活废水脱氮有可能使废水处理实现能源中性甚至能源正向。挑战在于抑制亚硝酸盐氧化细菌（NOB）的生长。这项研究提出了一种基于低溶解氧间歇通气来限制 NOB 生长的有前景的方法，从而为厌氧氨氧化细菌提供了与铵氧化细菌 (AOB) 合作的优势。结果表明，基于荧光原位杂交，该方法成功抑制了 NOB，NOB 的相对丰度保持在 2.0-2.6% 之间。在20℃以上的温度下，厌氧氨氧化可以有效去除生活污水中的氮，出水总氮（TN）浓度为6.6±2.7mg/L，进水TN和可溶性化学需氧量为62.6±3.1mg/L，分别为88.0±8.1mg/L。
Achieving nitrogen removal from domestic wastewater using anaerobic ammonium oxidation (anammox) has the potential to make wastewater treatment energy-neutral or even energy-positive. The challenge is to suppress the growth of nitrite-oxidizing bacteria (NOB). This study presents a promising method based on intermittent aeration with low dissolved oxygen to limit NOB growth, thereby providing an advantage to anammox bacteria to form a partnership with the ammonium-oxidizing bacteria (AOB). The results showed that NOB was successfully suppressed using that method, with the relative abundance of NOB maintained between 2.0–2.6%, based on Fluorescent in-situ Hybridization. Nitrogen could be effectively removed from domestic wastewater with anammox at a temperature above 20 °C, with an effluent total nitrogen (TN) concentration of 6.6 ± 2.7 mg/L, while the influent TN and soluble chemical oxygen demand were 62.6 ± 3.1 mg/L and 88.0 ± 8.1 mg/L, respectively.