IMPROVED PERFORMANCE BY A NEW LIQUID PERMANGANATE PRODUCT VS. CHLORINE DIOXIDE: ODOUR CONTROL AT A SEWAGE TREATMENT WORKS
Philip A. Vella1 and Mark Cleworth 2
1 Carus Chemical Company,USA. 2 Biachem Limited, UK
(free)
Odours are the most common problem in municipal sewage collection systems and treatment plants. Discontent and complaints from nearby neighbours or the local community can result. Odours are usually associated with sulphides (especially hydrogen sulphide (H2S) and mercaptans) but can also be caused by amines, aldehydes, ketones, and other organic compounds.
This paper compares ECONOXTM liquid permanganate, a new commercially available liquid permanganate product, to stabilized solutions of chlorine dioxide (SSCD) for hydrogen sulphide and mercaptan odour control. The results of the site demonstration showed that ECONOX was successful in controlling the atmospheric hydrogen sulphide levels that dropped from a high of 98 ppm in the centrate sump to a low of approximately 1 ppm. The average hydrogen sulphide readings dropped from 72 ppm to approximately 1 ppm. Dissolved hydrogen sulphide levels in the filtrate dropped from an average of 1 mg/L to 0 mg/L. When compared to a solution of stabilized chlorine dioxide, ECONOX was found to be 60% more economic and efficient for the control of odours arising from hydrogen sulphide and mercaptans.
KEY WORDS Chlorine Dioxide, Hydrogen Sulphide, Liquid Permanganate, Mercaptan, Odour Control, Sewage
