Liang Jiahao, Wang Qinghong, Yoza Brandon A, Li Qing X, Chen Chunmao, Ming Jie, Yu Jingshi, Li Jin, Ke Ming
State Key Laboratory of Heavy Oil Processing, State Key Laboratory of Petroleum Pollution Control, China University of Petroleum-Beijing, Beijing 102249, China.
Hawaii Natural Energy Institute, University of Hawaii at Manoa, Honolulu, HI 96822, United States.
Bioresour Technol. 2020 Jun;305:123084. doi: 10.1016/j.biortech.2020.123084. Epub 2020 Feb 24.
Long start-up period and slow granulation are major restraints in up-flow anaerobic sludge blanket (UASB) reactors for the treatment of refractory wastewater. In this study, Calcium sulfate (CaSO), CaSO/guar gum (GG), and CaSO/cationic polyacrylamide (CPAM) were used to enhance granulation during the treatment of phenolic wastewaters in UASB reactors. Use of CaSO, CaSO/GG, and CaSO/CPAM increased formation of granules (>0.25 mm) by 7%, 21% and 40%, respectively, after 90 days in comparison with the control. Use of CaSO/GG and CaSO/CPAM at an organic loading rate of 2.89 kg chemical oxygen demand (COD) m d increased the COD removal efficiency by 9% and 3%, respectively, in comparison with the control (75%). The CaSO enhanced the granulation rate as nuclei and the subsequent dissolution of CaSO improves the activity of methanogens. Polymers facilitated bacteria adhesion and improved the diversity of phenols-degrading bacteria. This study describes a new method for rapid granulation in UASB reactors when treating toxic and refractory wastewaters.
启动周期长和颗粒化缓慢是上流式厌氧污泥床（UASB）反应器处理难降解废水的主要限制因素。在本研究中，使用硫酸钙（CaSO）、硫酸钙/瓜尔胶（GG）和硫酸钙/阳离子聚丙烯酰胺（CPAM）来促进UASB反应器处理含酚废水过程中的颗粒化。与对照组相比，在90天后，使用硫酸钙、硫酸钙/瓜尔胶和硫酸钙/阳离子聚丙烯酰胺分别使大于0.25毫米的颗粒形成增加了7%、21%和40%。在有机负荷率为2.89千克化学需氧量（COD）/立方米·天的情况下，使用硫酸钙/瓜尔胶和硫酸钙/阳离子聚丙烯酰胺与对照组（75%）相比，COD去除效率分别提高了9%和3%。硫酸钙作为晶核提高了颗粒化速率，随后硫酸钙的溶解提高了产甲烷菌的活性。聚合物促进了细菌附着，并改善了酚类降解细菌的多样性。本研究描述了一种在UASB反应器处理有毒难降解废水时实现快速颗粒化的新方法。
