Shenyang Institute of Automation in Guangzhou, Chinese Academy of Sciences, Guangzhou 511458, China.
Shenyang Institute of Automation in Guangzhou, Chinese Academy of Sciences, Guangzhou 511458, China.
Bioresour Technol. 2018 Apr;254:347-352. doi: 10.1016/j.biortech.2018.01.107. Epub 2018 Jan 31.
Good start-up and performance are essential for the completely autotrophic nitrogen removal over nitrite (CANON) process, and inorganic carbon (IC) is also important for this process. In this study, a lab-scale submerged aerated biological filter (SABF) was adopted for the CANON process. A 16S rRNA gene high-throughput sequencing analysis showed that the phyla Proteobacteria and Planctomycetes were the dominant microorganisms and that the genus Candidatus Brocadia functioned as the nitrogen remover. The effect of IC on the nitrogen removal was analyzed. The results showed that the optimum concentration ratio of IC to nitrogen (IC/N) was 1.2, which produced the highest average ammonium nitrogen removal rate (ANR) and total nitrogen removal rate (TNR) values of 95.5% and 80.3%, respectively. The average AOB and AnAOB activities were 2.45 mg·L·h and 3.57 mg·L·h, respectively. This research could promote the nitrogen removal ability of the CANON process with a SABF in the future.
好的启动和性能对于完全自养亚硝酸盐脱氮（CANON）过程至关重要，而无机碳（IC）对于该过程也很重要。本研究采用实验室规模的淹没式曝气生物滤池（SABF）进行 CANON 工艺。16S rRNA 基因高通量测序分析表明，优势微生物为变形菌门和浮霉菌门，脱氮功能菌为Candidate Brocadia 属。分析了 IC 对氮去除的影响。结果表明，IC 与氮的最佳浓度比（IC/N）为 1.2，此时铵氮去除率（ANR）和总氮去除率（TNR）的平均值最高，分别为 95.5%和 80.3%。平均 AOB 和 AnAOB 活性分别为 2.45mg·L·h 和 3.57mg·L·h。本研究可以提高未来 SABF 中 CANON 工艺的氮去除能力。
