Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n, Valladolid 47011, Spain; Faculty of Engineering, Architecture and Urbanism and Geography, Federal University of Mato Grosso do Sul, Avenida Costa e Silva s/n, 79070-900 Campo Grande, MS, Brazil; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain.
Institute of Sustainable Processes, University of Valladolid, Dr. Mergelina s/n, Valladolid 47011, Spain; Department of Chemical Engineering and Environmental Technology, School of Industrial Engineering, University of Valladolid, Dr. Mergelina, s/n, 47011 Valladolid, Spain.
Bioresour Technol. 2021 Nov;340:125552. doi: 10.1016/j.biortech.2021.125552. Epub 2021 Jul 16.
The domestic sewage treatment performance of an integrated anoxic-aerobic photobioreactor with biomass settling and recycling, coupled with anaerobic digestion of the produced bacterial-algal biomass and biogas upgrading in the photobioreactor was investigated. Hydraulic retention time in the photobioreactor initially was 4 days (stage I and II) and then reduced to 2.5 days (stage III). The integrated system supported high total organic carbon removals of 98.9 ± 1.1% regardless of the operational stage. A high total nitrogen removal of 90.8 ± 8.0% was recorded in the integrated system during the three operational stages, while total phosphorus removals accounted for 68.4 ± 20.1%, 68.3 ± 20.8% and 53.4 ± 25.0% in stages I, II and III, respectively. Biogas upgrading in the absorption column exhibited maximum removals of CO and HS of 74.7 ± 3.0% and 99.0 ± 2.8%, respectively. Biomass settling and recycling resulted in overall improvement of biomass settleability.
采用内置缺氧-好氧光生物反应器，结合生物产絮和回流、以及厌氧消化产生的细菌-藻类生物质和光生物反应器中沼气升级，研究了生活污水的处理性能。光生物反应器的水力停留时间最初为 4 天（阶段 I 和 II），然后减少到 2.5 天（阶段 III）。无论操作阶段如何，该集成系统都能支持高达 98.9±1.1%的总有机碳去除率。在三个操作阶段中，集成系统记录了 90.8±8.0%的高总氮去除率，而总磷去除率分别为阶段 I、II 和 III 的 68.4±20.1%、68.3±20.8%和 53.4±25.0%。吸收柱中的沼气升级表现出 CO 和 HS 的最大去除率分别为 74.7±3.0%和 99.0±2.8%。生物产絮和回流导致生物絮体的整体沉降性能得到改善。
