Peng Si-Mai, Luo Hai-Chao, Wang Zi-Han, Yang Shan-Shan, Guo Wan-Qian, Ren Nan-Qi
State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
Bioresour Technol. 2023 Jun;377:128914. doi: 10.1016/j.biortech.2023.128914. Epub 2023 Mar 20.
Side-stream reactor (SSR), as an in-situ sludge reduction process with high sludge reduction efficiency (SRE) and less negative impact on effluent, has been widely researched. In order to reduce cost and promote large-scale application, the anaerobic/anoxic/micro-aerobic/oxic bioreactor coupled with micro-aerobic SSR (AAMOM) was used to investigate nutrient removal and SRE under short hydraulic retention time (HRT) of SSR. When HRT of SSR was 4 h, AAMOM system achieved 30.41% SRE, while maintaining carbon and nitrogen removal efficiency. Micro-aerobic in mainstream accelerated the hydrolysis of particulate organic matter (POM) and promoted denitrification. Micro-aerobic in side-stream increased cell lysis and ATP dissipation, thus increasing SRE. Microbial community structure indicated that the cooperative interactions among hydrolytic, slow growing, predatory and fermentation bacteria played key roles in improving SRE. This study confirmed that SSR coupled micro-aerobic was a promising and practical process, which could benefit nitrogen removal and sludge reduction in municipal wastewater treatment plants.
侧流反应器（SSR）作为一种原位污泥减量工艺，具有较高的污泥减量效率（SRE）且对出水负面影响较小，已得到广泛研究。为了降低成本并促进大规模应用，采用厌氧/缺氧/微好氧/好氧生物反应器与微好氧SSR耦合（AAMOM），研究了SSR在短水力停留时间（HRT）下的营养物去除和SRE情况。当SSR的HRT为4小时时，AAMOM系统实现了30.41%的SRE，同时保持了碳和氮的去除效率。主流中的微好氧条件加速了颗粒有机物（POM）的水解并促进了反硝化作用。侧流中的微好氧条件增加了细胞裂解和ATP消耗，从而提高了SRE。微生物群落结构表明，水解菌、生长缓慢的细菌、捕食性细菌和发酵细菌之间的协同相互作用在提高SRE中起关键作用。本研究证实，SSR耦合微好氧是一种有前景且实用的工艺，可有利于城市污水处理厂的脱氮和污泥减量。
