School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, PR China.
School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, PR China.
Bioresour Technol. 2021 Jan;319:124164. doi: 10.1016/j.biortech.2020.124164. Epub 2020 Sep 24.
For achieving mainstream anaerobic ammonium oxidation (Anammox), there is a need to achieve organic carbon and phosphorus removal meanwhile supplying nitrite (NO-N). Based on this demand, a novel anaerobic/anoxic/aerobic operated denitrifying nitrite accumulation and phosphorus removal (DNAPR) process was proposed for treating synthetic municipal and nitrate (NO-N) wastewaters simultaneously (volume ratio of 5:1). By adjusting influent composition, discharging anaerobic-end supernatant, shortening anoxic duration, and adding a short aerobic stage, DNAPR process achieved promising and stable nitrate-to-nitrite transformation (78.35%) and phosphorus removal (98.34%) performance. Moreover, effluent with chemical oxygen demand of 16.63 mg/L, nitrite of 54.16 mg/L, orthophosphate of 0.37 mg/L, and nitrite to ammonia ratio of 1.3 were finally obtained after 141-day operation. Microbiological analysis showed that Thauera (34.9%) and unclassified_f_Rhodobacteraceae (6.79%) were both responsible for DNAPR. Therefore, DNAPR, serving as promising alternative pretreatment, might possess significance for achieving mainstream Anammox.
为实现主流厌氧氨氧化（Anammox），需要同时去除有机碳和磷，并供应亚硝酸盐（NO-N）。基于这一需求，提出了一种新型的厌氧/缺氧/好氧脱氮亚硝酸盐积累和除磷（DNAPR）工艺，用于同时处理合成城市和硝酸盐（NO-N）废水（体积比为 5:1）。通过调整进水成分、排放厌氧末端上清液、缩短缺氧时间和添加短好氧阶段，DNAPR 工艺实现了有希望且稳定的硝酸盐到亚硝酸盐的转化（78.35%）和磷去除（98.34%）性能。此外，经过 141 天的运行，最终出水的化学需氧量为 16.63mg/L、亚硝酸盐为 54.16mg/L、正磷酸盐为 0.37mg/L、亚硝酸盐与氨的比例为 1.3。微生物分析表明，Thauera（34.9%）和未分类_f_Rhodobacteraceae（6.79%）都负责 DNAPR。因此，DNAPR 作为一种有前途的替代预处理方法，可能对实现主流 Anammox 具有重要意义。
