Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7479456 | Journal of Environmental Management | 2016 | 5 Pages |
Abstract
We examined the effects of ultrasound (U), Fenton oxidation (F), and ultrasound coupled with Fenton oxidation (UÂ +Â F) pre-treatments (prior to anaerobic digestion) on the elimination of odorous compounds. The results demonstrated that U promoted odor release, while the coupled treatment and F alone decreased odor release. After 20-min treatments, the concentration of dissolved sulfide (S2â) under the coupled UÂ +Â F treatment declined from 17.4Â mg/L to 8.1Â mg/L, decreasing by more than 50% and 34%, respectively, for U alone and F alone. In addition, the dissolved sulfate (SO42â) concentration under couple UÂ +Â F treatment significantly increased in sewage sludge from 200Â mg/L to 390.6Â mg/L, up 95.3% compared to U alone and 5% compared to F alone. This illustrates the oxidation process from S2â to SO42â. Throughout experimentation, SO42â was odorless and stable, highlighting the mechanism of odor control. Thus, combining U and F into a single coupled treatment proved to be a better alternative pretreatment for controlling sludge odor compared to the U and F alone and can effectively decrease potential odor release.
Keywords
Related Topics
Physical Sciences and Engineering
Energy
Renewable Energy, Sustainability and the Environment
Authors
Nuo Liu, Changxiu Gong, Jianguo Jiang, Feng Yan, Sicong Tian,