Controlling odors from sewage sludge using ultrasound coupled with Fenton oxidation

Nuo Liu, Changxiu Gong, Jianguo Jiang*, Feng Yan, Sicong Tian

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

We examined the effects of ultrasound (U), Fenton oxidation (F), and ultrasound coupled with Fenton oxidation (U + 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 (S2-) under the coupled U + F treatment declined from 17.4 mg/L to 8.1 mg/L, decreasing by more than 50% and 34%, respectively, for U alone and F alone. In addition, the dissolved sulfate (SO42-) concentration under couple U + F treatment significantly increased in sewage sludge from 200 mg/L to 390.6 mg/L, up 95.3% compared to U alone and 5% compared to F alone. This illustrates the oxidation process from S2- to SO42-. Throughout experimentation, SO42- 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. (C) 2016 Published by Elsevier Ltd.

Original languageEnglish
Pages (from-to)124-128
Number of pages5
JournalJournal of Environmental Management
Volume181
DOIs
Publication statusPublished - 1 Oct 2016
Externally publishedYes

Keywords

  • Waste water treatment plant (WWTP)
  • Sewage sludge
  • Ultrasound coupled with Fenton oxidation
  • Odor control
  • WASTE ACTIVATED-SLUDGE
  • WATER TREATMENT-PLANT
  • ANAEROBIC-DIGESTION
  • PRETREATMENT
  • REMOVAL
  • CARBON
  • BIOFILTRATION
  • PERFORMANCE
  • IMPROVEMENT
  • EMISSIONS

Cite this