ETC’s Klorigen system selected by AWWU will produce 5,000 gallons per day of disinfectant solution at a concentration of 12.5% (125 gpl) for long term storage and direct injection. In addition, the system will be designed for future expansion to 10, 000 gpd per day.
The John M. Asplund Wastewater Treatment Facility is a primary municipal wastewater treatment facility which currently processes an average of 28 million gallons per day. Primary effluent is chlorinated prior to discharge to a marine outfall and AWWU wants to eliminate the handling and storage of pressurised gaseous chlorine currently used at the plant. Before awarding the contract to ETC, AWWU conducted a study to evaluate numerous alternatives, including UV disinfection, 0.8% and 12.5% sodium hypochlorite production onsite, shipping bulk sodium hypochlorite in trade strength solution as well as some other technologies. Due to the higher operating cost of other processes, the utility chose the higher strength sodium hypochlorite alternative offered by Electrolytic Technologies Corporation.
Klorigen uses high grade salt and utility-supplied water to generate disinfectant solution at the point of use. Klorigen generated chemicals meet NSF/ANSI Standard 60 requirements and the process has been designated by the US Department of Homeland Security as a ‘Qualified Anti-Terrorism Technology’. Producing water disinfection chemicals on site eliminates the hazards of transport, handling and storage of toxic chemicals, and, due to its proprietary salt treatment process and low power consumption, Klorigen has the lowest carbon footprint of any electrochemical process designed exclusively for municipal applications.