Wu Shan, Wang Shu-Ya, Wang Fen, Ji Min
School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China.
Ji'nan Urban Construction Group Co., Ltd., Ji'nan 250031, China.
Huan Jing Ke Xue. 2022 Jan 8;43(1):416-423. doi: 10.13227/j.hjkx.202105280.
For the ambient and low-temperature operation of the anaerobic ammonium oxidation (ANAMMOX) process, sequence batch biofilm reactors (SBBR) with non-woven fabric and modified polyurethane foam as carriers, respectively, were used to treat nitrogenous wastewater. Nitrogen removal performances of both reactors were investigated while the temperature decreased from 35℃ to 15℃. When the nitrogen loading rate (NLR) was 110 mg·(L·d), the average total nitrogen (TN) removal rate of the non-woven fabric reactor increased from 71.16% (35℃) to 76.19% (30℃) and then decreased to 61.11% (15℃). The average TN removal rate of the modified polyurethane foam reactor increased from 78.71% (35℃) to 81.75% (20℃) and then decreased to 75.68% (15℃). Compared with the non-woven fabric, the modified polyurethane foam provided a more stable nitrogen removal performance and could be used as the preferred carrier. High-throughput sequencing of the modified polyurethane foam biofilm indicated that was the dominant ANAMMOX genus, with relative abundances of 8% (35℃), 5% (25℃), and 16% (15℃). still grew and enriched at low temperatures. The decrease in temperature significantly affected the biofilm microbial community structure.
为了实现厌氧氨氧化（ANAMMOX）工艺的常温及低温运行，分别采用以无纺布和改性聚氨酯泡沫为载体的序批式生物膜反应器（SBBR）处理含氮废水。在温度从35℃降至15℃的过程中，对两个反应器的脱氮性能进行了研究。当氮负荷率（NLR）为110 mg·(L·d)时，无纺布反应器的平均总氮（TN）去除率从71.16%（35℃）提高到76.19%（30℃），然后降至61.11%（15℃）。改性聚氨酯泡沫反应器的平均TN去除率从78.71%（35℃）提高到81.75%（20℃），然后降至75.68%（15℃）。与无纺布相比，改性聚氨酯泡沫具有更稳定的脱氮性能，可作为首选载体。对改性聚氨酯泡沫生物膜进行高通量测序表明， 是优势ANAMMOX菌属，相对丰度分别为8%（35℃）、5%（25℃）和16%（15℃）。 在低温下仍能生长和富集。温度降低显著影响了生物膜微生物群落结构。
