Equipment comparison for reduction of bisphenol A and ethylbenzene in manufacturing process streams
Bisphenol A is a complex hydrocarbon commonly present in numerous plastics manufacturing wastewater. Various benzene pollutants are also present, with ethylbenzene being one of the most common. Both of these pollutants are detrimental to aerobic and anaerobic microbial reduction as received from the wastewater stream, requiring oxidation to their various intermediary states in order to allow for efficient biological consumption and reduction into their end products of carbon dioxide and water. Advanced Oxidation Processes (AOP) has been employed as both first stage oxidation and total oxidation processes en lieu of biological consumption. Depending on the various other chemical pollutants that may be present, such as surfactants and oils, this can require the use of carbon absorption or other absorption technologies as a final polishing stage prior to discharge or re-use as process water. Aquatic Technologies was asked to look at a manufacturing wastewater in late 2007. The plant was looking to expand its operation and had to reduce it’s Bisphenol A and ethylbenzene levels from 300mg/l for each respectively, to less then 2mg/l prior to discharge. The question was whether Aquatic Technologies EOH2O™ Electrolytic Oxidation Process could be employed to remove the need for hydrogen peroxide or ozone to reduce the expected operational costs.