Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
Bioresour Technol. 2015 Mar;179:497-504. doi: 10.1016/j.biortech.2014.12.043. Epub 2014 Dec 19.
The anammox (anaerobic ammonium oxidation) process has attracted much attention for its cost-saving. However, excess nitrate is usually produced which should be further treated. In this study, an innovative process combined anammox with partial denitrification (nitrate→nitrite) was proposed for advanced nitrogen removal in two sequencing batch reactors (SBRs). The nitrate produced in anammox-SBR (ASBR) was fed into partial denitrification-SBR (DSBR), in which the nitrate was reduced to nitrite, and then removed by backflow of the nitrite to ASBR for secondary anammox process. Results showed that ∼80% nitrate in the effluent of previous anammox was converted to nitrite in DSBR. And the maximum nitrogen removal efficiency (NRE) of 94.06% was obtained with total nitrogen (TN) in the effluent of 10.98 mg/L in average. It indicated that desired effluent quality could be achieved, and the advanced nitrogen removal performance was attributed to the successful achievement of partial denitrification.
厌氧氨氧化（anammox）工艺因其节省成本而受到广泛关注。然而，通常会产生过量的硝酸盐，需要进一步处理。在这项研究中，提出了一种将厌氧氨氧化与部分反硝化（硝酸盐→亚硝酸盐）相结合的创新工艺，用于在两个序批式反应器（SBR）中进行高级脱氮。在厌氧氨氧化-SBR（ASBR）中产生的硝酸盐被输送到部分反硝化-SBR（DSBR）中，在该反应器中，硝酸盐被还原为亚硝酸盐，然后通过亚硝酸盐回流到 ASBR 中进行二次厌氧氨氧化过程。结果表明，DSBR 中前一阶段厌氧氨氧化出水中约 80%的硝酸盐转化为亚硝酸盐。并且在平均出水总氮（TN）为 10.98mg/L 的情况下，获得了 94.06%的最大脱氮效率（NRE）。这表明可以达到预期的出水质量，并且高级脱氮性能归因于部分反硝化的成功实现。
