Ozonation of sludge-press liquors: Determination of carbonyl compounds by the PFBOA method and the effect on the chemical oxygen demand
- Univ. Chemical Lab., Kent (United Kingdom)
- Southern Water Services Limited, Kent (United Kingdom)
The European Community Urban Waste Water Treatment Directive, May 1991, requires water service companies to provide sufficient wastewater treatment to meet a new limit set for the Chemical Oxygen Demand (COD) in final effluent and new legislation has placed limits on the levels of COD that can be discharged from wastewater treatment works using secondary treatment processes. The current permitted upper level for COD in the final effluent is 125 mg per litre. Ozone is a strong oxidant and disinfectant and in contrast to chlorine, does not produce chlorinated by-products from its reaction with natural organic matter in water. In spite of the successful use of ozone for the treatment of potable waters since the early part of the century very few studies have been undertaken into possible chemical by-products which might arise from ozonation. Since the amount of ozone applied is always lower than that required to oxidize all the organic matter to carbon dioxide and water, a number of semi-oxidation products such as aromatic, phenolic and aliphatic carboxylic acids, aldehydes and ketones can be expected to be formed. The ozonation of sludge-press liquors and the resultant effect on COD was investigated. The concentration of carbonyl compounds was analyzed using O-(pentafluorobenzyl) hydroxylamine (PFBOA) as a derivatising agent in Gas Chromatographic (GC) determination.
- OSTI ID:
- 437341
- Report Number(s):
- CONF-960807-; ISSN 0270-3009; TRN: 97:000878-0028
- Journal Information:
- National Meeting - American Chemical Society, Division of Environmental Chemistry, Vol. 36, Issue 2; Conference: 212. national meeting of the American Chemical Society (ACS), Orlando, FL (United States), 25-30 Aug 1996; Other Information: PBD: 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
Anaerobic treatment of thermal sludge conditioning liquor with granular sludge
Oxidant effects on complex mixtures of nonvolatile organics in polluted waters: examination by HPLC and bioscreening