Reducing carbon source consumption through a novel denitratation/anammox biofilter to remove nitrate from synthetic secondary effluent
Reducing carbon source consumption through a novel denitratation/anammox biofilter to remove nitrate from synthetic secondary effluent
复制标题
通过新型脱硝/厌氧氨氧化生物过滤器去除合成二级废水中的硝酸盐，减少碳源消耗
DOI：
10.1016/j.biortech.2020.123377
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发表时间：
2020
影响因子：
11.4
通讯作者：
Peng Yongzhen
中科院分区：
文献类型：
--
作者：
Ma Bin;Xu Xinxin;Ge Shijian;Li Beiying;Wei Yan;Zhu Hongbo;Nan Xi;Peng Yongzhen
本研究提出了一种新的硝化/厌氧氨氧化生物滤池（DABF）去除二级出水中的硝酸盐，其中硝化（NO3-→NO2-）与厌氧氨氧化（NO2-+ NH 4 +→N2）耦合代替硝化（NO2-→N2）。当出水总氮平均浓度为7.82 mg/L时，DABF对总氮的去除率为81.90%。同时，DABF中的有机碳源消耗和污泥产量分别比常规生物滤池（DNBF）减少了63%和70%。氮平衡分析表明，DABF中93%的氮气是通过厌氧氨氧化产生的。批试验证实，DABF生物膜减少亚硝酸盐使用铵作为电子供体，并在反硝化过程中积累亚硝酸盐，从而为厌氧氨氧化细菌提供亚硝酸盐。高通量测序结果还表明，厌氧氨氧化菌Brocadia在DABF中占优势，并可能通过与其他微生物的相互作用维持DABF的稳定。
This study presents a novel denitratation/anammox biofilter (DABF) for nitrate removal from secondary effluent, where denitratation (NO3–→NO2–) is coupled with anammox (NO2–+NH4+→N2) instead of denitritation (NO2–→N2). Total nitrogen (TN) was removed by 81.90% in this DABF when the average effluent TN concentration was 7.82 mg/L. Meanwhile, organic carbon source consumption and backwash sludge production in the DABF were reduced by 63% and 70%, respectively, compared to conventional denitrifying biofilter (DNBF). Nitrogen banlance analysis indicates that 93% of the nitrogen gas produced in DABF was via anammox. Batch tests confirmed that the DABF biofilm reduced nitrite using ammonium as the electron donor, and accumulated nitrite during denitratation, thus providing nitrite for the anammox bacteria. Moreover, high-throughput sequencing approach also revealed that the anammox bacteriaCandidatusBrocadia dominated the community, which could also be responsible for the stable processes in DABF by interacting with the other denitrifying bacteria.