UBC Bioreactor Technology Group, School of Engineering, University of British Columbia (Okanagan), Kelowna, BC, Canada.
UBC Bioreactor Technology Group, School of Engineering, University of British Columbia (Okanagan), Kelowna, BC, Canada.
Water Res. 2016 Jun 1;96:84-93. doi: 10.1016/j.watres.2016.03.036. Epub 2016 Mar 15.
The objective of this research was to assess specific side-stream treatment processes for biodegradation and precipitation of dissolved nutrients in dewatering centrate. In this study, characterization was made of a conventional suspended growth deammonification treatment process for transforming dissolved polyphosphate (poly-P), dissolved organic phosphorus (DOP) and dissolved organic nitrogen (DON) in two types of dewatering centrate. The deammonification process was configured as a sequencing batch reactor (SBR), combining partial nitrification and anaerobic ammonia oxidation (anammox) in a single tank. The first centrate feed studied was from the full-scale Annacis Island wastewater treatment plant (AIWWTP) located in Metro Vancouver, Canada. The second centrate feed was from a lab-scale anaerobic digester (AD) fed waste sludge from the existing City of Kelowna Wastewater Treatment Facility (KWTF), located in the Okanagan Valley, Canada. In addition, poly aluminum chloride (PACL) dosing was assessed for final polishing of dissolved nutrients. The deammonification SBR (DeSBR) process showed similar treatment characteristics for both the KWTF and AIWWTP centrates with excellent DON removal and poor non-reactive dissolved phosphorus (NRDP) removal. A statistical comparison of the DOP and poly-P through the DeSBR process suggests that DOP has a higher biodegradation potential. Future research focused on understanding the variables associated with degradation of DOP could lead to better NRDP removal through deammonification processes. Utilization of a post-anammox PACL chemical dosing stage can achieve the objective of precipitating any residual DON and NRDP and producing an effluent that has lower dissolved nutrients than the pre-digestion KWTF dewatering centrate scenario.
本研究旨在评估脱水浓缩液中溶解养分的生物降解和沉淀的特定侧流处理工艺。在这项研究中，对两种类型的脱水浓缩液中传统悬浮生长脱氨处理工艺进行了特性描述，以转化溶解聚磷酸盐（poly-P）、溶解有机磷（DOP）和溶解有机氮（DON）。脱氨过程配置为序批式反应器（SBR），在单个罐中结合部分硝化和厌氧氨氧化（anammox）。研究的第一种浓缩液来自加拿大大温哥华地区安纳西岛污水处理厂（AIWWTP）的全规模处理厂。第二种浓缩液来自加拿大奥肯那根谷基隆那市现有污水处理厂（KWTF）的实验室规模厌氧消化器（AD）处理的剩余污泥。此外，还评估了聚合氯化铝（PACL）加药以最终去除溶解养分。脱氨 SBR（DeSBR）工艺对 KWTF 和 AIWWTP 浓缩液表现出相似的处理特性，具有出色的 DON 去除率和较差的非反应性溶解磷（NRDP）去除率。通过 DeSBR 工艺对 DOP 和 poly-P 的统计比较表明，DOP 具有更高的生物降解潜力。未来专注于了解与 DOP 降解相关的变量的研究，可能会通过脱氨工艺实现更好的 NRDP 去除。利用 anammox 后 PACL 化学加药阶段可以实现沉淀任何残留的 DON 和 NRDP 的目标，并产生比预消化 KWTF 脱水浓缩液方案具有更低溶解养分的出水。
