Evaluation of the impact of single-walled carbon nanotubes in an activated sludge wastewater reactor

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Y Yin, X Zhang

Abstract

This paper evaluated the impact of single-walled carbon nanotubes (SWCNTs) on the performance and activated sludge properties in an activated sludge wastewater reactor. The reactor was shock loaded with 270 mg/L of 90% purified SWCNTs after the reactor reached quasi-steady state and the reactor was monitored for 18 days after the shock loading. Various experimental parameters were measured and compared. Overall the addition of SWCNTs did not negatively impact the performance of the activated sludge reactor; on the other hand, SWCNTs improved sludge settleability and sludge dewaterability. The cake solids of the sludge were increased and the activated sludge flocs became less negatively charged. The positive impacts were more significant in Phase II (after running the reactor for one solids retention time, SRT) than that in Phase III (after running for additional 1.5 SRT).

Citations

Oct 13, 2011·Environmental Science & Technology·Elijah J PetersenKai Loon Chen
Feb 13, 2010·Journal of Hazardous Materials·Lauren A Luongo, Xiaoqi Jackie Zhang
Mar 10, 2015·Environmental Science & Technology·Yuanyuan QuJizhong Zhou
Mar 27, 2018·Nanoscale·Margarita Esquivel-GaonValentina Castagnola
Apr 25, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Qiao MaJiti Zhou
May 5, 2009·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Yexin YinLauren Luongo

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