University of Chemistry and Technology , Technicka 5, 166 28 Prague, Czech Republic.
ETH Zürich , Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 1-5/10, 8093 Zürich, Switzerland.
Environ Sci Technol. 2017 Oct 3;51(19):11029-11038. doi: 10.1021/acs.est.7b02078. Epub 2017 Sep 14.
Partial nitritation/anammox can provide energy-efficient nitrogen removal from the main stream of municipal wastewater. The main bottleneck is the growth of nitrite oxidizing bacteria (NOB) at low temperatures (<15 °C). To produce effluent suitable for anammox, real municipal wastewater after anaerobic pretreatment was treated by enriched ammonium oxidizing bacteria (AOB) in suspended sludge SBR at 12 °C. NOB were continually washed out using aerobic duration control strategy (ADCS). Solids retention time was set to 9-16 days. Using this approach, average ammonia conversion higher than 57% at high oxidation rate of 0.4 ± 0.1 kg-N kg-VSS d was achieved for more than 100 days. Nitrite accumulation (N-NO/N-NO) of 92% was maintained. Thus, consistently small amounts of present NOB were efficiently suppressed. Our mathematical model explained how ADCS enhanced the inhibition of NOB growth via NH and HNO. This approach will produce effluent suitable for anammox even under winter conditions in mild climates.
部分亚硝化/厌氧氨氧化可以为从城市污水主流中提供节能的脱氮。主要的瓶颈是低温（<15°C）下亚硝酸氧化菌（NOB）的生长。为了生产适合厌氧氨氧化的出水，经过厌氧预处理的实际城市污水在 12°C 下用悬浮污泥 SBR 中的富集氨氧化菌（AOB）进行处理。通过好氧持续时间控制策略（ADCS）不断冲洗出 NOB。固体停留时间设定为 9-16 天。采用这种方法，在高氧化速率为 0.4±0.1kg-N kg-VSS d 时，氨的转化率超过 57%，持续 100 多天。维持了 92%的亚硝酸盐积累（N-NO/N-NO）。因此，始终保持少量的现有 NOB 被有效抑制。我们的数学模型解释了 ADCS 如何通过 NH 和 HNO 增强对 NOB 生长的抑制作用。即使在温和气候的冬季条件下，这种方法也将生产出适合厌氧氨氧化的出水。
