Formation and degradation of valuable intermediate products during wet oxidation of municipal sludge

Bioresour Technol. 2016 Apr:205:280-5. doi: 10.1016/j.biortech.2016.01.039. Epub 2016 Jan 23.

Abstract

The current study investigated the formation of organic acids and alcohols as major intermediate products of wet oxidation of municipal sludge. Municipal sludge was subjected to 60-min wet oxidation at temperatures ranging from 220 to 240°C, with 20bar oxygen partial pressure. Acetic acid was the main intermediate compound produced in this study, followed by propionic, n-butyric, iso-butyric and pentanoic acids and methanol. It was found that the process severity has a significant influence on the formation and degradation of these intermediate products.

Keywords: Hydrothermal processing; Intermediates; Municipal sludge; Organic acids; Wet oxidation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Acetic Acid / chemistry
  • Methanol / chemistry
  • Molecular Weight
  • Organic Chemicals / chemistry
  • Oxidation-Reduction
  • Pentanoic Acids / chemistry
  • Propionates / chemistry
  • Sewage / chemistry*
  • Temperature
  • Waste Management / methods*

Substances

  • Organic Chemicals
  • Pentanoic Acids
  • Propionates
  • Sewage
  • propionic acid
  • Acetic Acid
  • Methanol