Characteristics of Nutrients Removal under Viscous Sludge Bulking Treating Synthetic Wastewater  

作　　者：Zhaoxu Peng Zhongyuan Zhao Tianyu Lou Kun Jiang Lei Li 

机构地区：[1]School of Water Conservancy Engineering,Zhengzhou University,Zhengzhou 450001,China [2]State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology,Harbin 150090,China

出　　处：《Journal of Harbin Institute of Technology(New Series)》2021年第6期37-43,共7页哈尔滨工业大学学报（英文版）

基　　金：the Key Scientific Research in Colleges and Universities of Henan Province Project(Grant No.20B560018);the National Science and Technology Major Project of the Ministry of Science and Technology of China(Grant No.2015ZX07204-002-04).

摘　　要：Viscous sludge bulking is a rare phenomenon in activated sludge process.The performances of nutrients removal were investigated with normal sludge and viscous bulking sludge.The results showed that when COD loading and C/N ratio were around 0.13 mg COD/(mg MLSS·d)and 7.67,the effect of viscous sludge bulking on the maximum specific oxidation rates of NH_(4)^(+)⁃N was very little,while the maximum specific oxidation rates of NO_(2)^(-)⁃N decreased from 24.69 mg/(g·h)to 1.20 mg/(g·h).Compared with normal sludge,viscous bulking sludge had bigger particle size and more extracellular polymeric substances(EPS).The mass transfer resistance in sludge flocs might be the main cause of the difference in NO-2⁃N oxidation rates.Therefore,this study demonstrates that viscous sludge bulking is beneficial to enhance simultaneous nitrification and denitrification(SND),and excessive EPS will exhibit storage function during phosphorus removal process.

关 键 词：activated sludge nitrogen removal viscous sludge bulking nitrification kinetics phosphorus uptake 

分 类 号：X703.1[环境科学与工程—环境工程]