Abstract
A study was conducted to determine the effects of ozonation on pH, heavy metals, and COD of four sludges, i.e., return activated sludge, thickened sludge, anaerobically digested sludge, and bottom sediments of lake as a control sludge. It was found that heavy metals were released from the sludges after ozonation. Total COD decreased considerably and dissolved COD increased as a result of ozonation. Slight changes in pH values were observed during ozonation, and odor was completely eliminated from all sludges.
| Original language | English |
|---|---|
| Pages (from-to) | 609-637 |
| Number of pages | 29 |
| Journal | Journal of Environmental Science and Health. Part A: Environmental Science and Engineering |
| Volume | 17 |
| Issue number | 5 |
| DOIs | |
| State | Published - 1 Jan 1982 |
Bibliographical note
Funding Information:This study was conducted at the University of Miami, Florida, with the aid of a Glaser Fellowship. A section of this paper on return activated sludge and bottom sediments of the lake was presented at the Water Forum '81, August 10-14, 1981, at San Francisco, California. The travelling grant was provided by the Research Committee of the UPM.
Keywords
- Biological sludges
- COD
- Heavy
- Odor
- Oxidation
- Ozone
- metals
ASJC Scopus subject areas
- Pollution
