Abstract
Dechlorination is a process by which some or most of the chlorine is removed as per the required use. Dechlorination is carried out in many instances, but the most complicated one of all is wastewater effluent dechlorination because of the need to reduce the amount of total chlorine residual below 0.01mgCl2/L in the effluent to reduce toxicity to the receiving water environment. Organic nitrogen in the effluent introduces complexity into chlorination and dechlorination. Organochloramines, formed by reaction with organic nitrogen, are persistent and difficult to dechlorinate. Available dechlorination chemicals are sulfur dioxide, sulfite compounds, activated carbon, and hydrogen peroxide. The most commonly used compound in wastewater dechlorination is sulfur dioxide. In addition, chlorinated organic compounds, pharmaceutical compounds that are present in effluents and that are formed during chlorination/dechlorination are serious concerns. This chapter reviews the literature and provides guidance for wastewater effluent dechlorination processes for various industries and applications including wastewater reuse and reclamation.
| Original language | English |
|---|---|
| Title of host publication | Current Developments in Biotechnology and Bioengineering: Biological Treatment of Industrial Effluents |
| Editors | Duujong Lee, Veeriah Jegatheesan, Haohuu Ngo, Patrick C. Hallenbeck, Ashok Pandey |
| Place of Publication | Netherlands |
| Publisher | Elsevier |
| Pages | 359-380 |
| Number of pages | 22 |
| ISBN (Electronic) | 9780444636768 |
| ISBN (Print) | 9780444636652 |
| DOIs | |
| Publication status | Published - 2016 |
Keywords
- carbon, activated
- dechlorination
- hydrogen peroxide
- sewage
- sulfites
- sulfur dioxide
