黄铁矿和硫耦合自养反硝化系统用于高效去除硝酸盐和磷酸盐。
Pyrite and sulfur-coupled autotrophic denitrification system for efficient nitrate and phosphate removal.
机构信息
Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan, Shandong 250014, PR China.
Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan, Shandong 250014, PR China.
出版信息
Bioresour Technol. 2023 Sep;384:129363. doi: 10.1016/j.biortech.2023.129363. Epub 2023 Jun 17.
The inefficiency of nitrogen removal in pyrite autotrophic denitrification (PAD) and the low efficiency of PO-P removal in sulfur autotrophic denitrification (SAD) limit their potential for engineering applications. This study examined the use of pyrite and sulfur coupled autotrophic denitrification (PSAD) in batch and column experiments to remove NO-N and PO-P from sewage. The effluent concentration of NO-N was 0.32 ± 0.11 mg/L, with an average Total nitrogen (TN) removal efficiency of 99.14%. The highest PO-P removal efficiency was 100% on day 18. There was a significant correlation between pH and the efficiency of PO-P removal. Thiobacillus, Thiomonas and Thermomonas were found to be dominant at the bacterial genus level in PSAD. Additionally, the abundance of Thermomonas in the PSAD was greater than that observed in the SAD reactor. This result indirectly indicates that the PSAD system has more advantages in reducing NO.
在黄铁矿自养反硝化（PAD）中脱氮效率低，在硫自养反硝化（SAD）中磷去除效率低，限制了它们在工程应用中的潜力。本研究通过批式和柱式实验考察了利用黄铁矿和硫自养耦合反硝化（PSAD）从污水中去除硝态氮（NO-N）和正磷酸盐（PO-P）的效果。NO-N 的出水浓度为 0.32±0.11mg/L，总氮（TN）去除率平均达到 99.14%。第 18 天 PO-P 的去除效率最高，达到 100%。pH 值与 PO-P 去除效率之间存在显著相关性。在 PSAD 中，硫杆菌属、硫单胞菌属和嗜热菌属是主要的细菌属。此外，PSAD 中嗜热菌的丰度高于 SAD 反应器。这一结果间接表明 PSAD 系统在减少 NO 方面具有更多优势。
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