文献类型：期刊文献

英文题名：In-situ sludge reduction and carbon reuse in an anoxic/oxic process coupled with hydrocyclone breakage

作者：Xu, Yinxiang[1,2,3];Fang, Yuanyuan[1];Wang, Zhenhua[1];Guo, Dan[1];Liu, Yi[1];Huang, Yuan[1];Fu, Pengbo[1];Jin, Juehui[1];Wei, Chenwen[1];Wang, Hualin[1];Zeng, Tao[2]

机构：[1]East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Sichuan Univ Sci & Engn, Sichuan Engn Lab Resource Utilizat Mine Tailings, Zigong 643000, Sichuan, Peoples R China;[3]Beijing Univ Aeronaut & Astronaut, Sch Space & Environm, Beijing 100191, Peoples R China

年份：2018

卷号：141

起止页码：135

外文期刊名：WATER RESEARCH

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000439403000013)】；

基金：This work was supported by the National Science Foundation for Distinguished Young Scholars of China (51125032); the Key Research Program of Provincial Science and Technology Department in Sichuan (2017SZ0167); the Research Program of Sichuan Provincial Key Lab of Process Equipment and Control Engineering (GK201704); the Special Plan Program for Young Science and Technology Innovation team in Sichuan Province (2017TD0027); and the Key Science and Technology Program of Zigong (2016SF02).

语种：英文

外文关键词：Activated sludge; Hydrocyclone treatment; Sludge reduction; Carbon sources reuse; Anoxic-oxic process

摘要：The long term performance of an anoxic-oxic-hydrocyclone (AOH) process with an in-situ hydro cyclone treatment unit in the mixed liquid return line for sludge reduction and carbon reuse has been observed, in comparison with a conventional anoxic-oxic (AO) process. Three parallel side-stream systems, including one AOH(25) system with a 25-mm hydrocyclone, one AOH(35) system with a 35-mm hydrocyclone and one AO system, were built and fed with real wastewater for a comparative study in a wastewater treatment plant. The results demonstrate that the hydrocyclone in the AOH process was able to break macro-flocs into smaller flocs. And the desorption of the extracellular polymeric substance from return activated sludge (AS) leaded to an average increase of 62.97% and 36.36% in SCOD in the AOH(25) and AOH(35) system, respectively. In addition, shear forces, centrifugal forces of revolution and flocs' rotation in the hydrocyclone were proposed to be the main influence mechanism of hydrocyclone treatment on AS properties. Compared with the AO process, the SCOD concentration in the effluent of the AOH processes presented a decrease of 12.0 mg/L and the TN was reduced by 21.50% owing to the released carbon sources reuse. Moreover, the sludge production was reduced by 36.81% and 35.92% in the AOH(25) and AOH(35) process, respectively. By contrast, the AOH(25) system was better than the AOH(35) system. (C) 2018 Elsevier Ltd. All rights reserved.