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From Water and Wastewater.com Industry News
The Millennium generators combine a 25% sodium chlorite solution with chlorine gas (or 12.5% sodium hypochlorite and 15% hydrochloric acid to form chlorine in-situ) under vacuum conditions to generate chlorine dioxide safely and efficiently. The generators are capable of consistently producing onsite chlorine dioxide with a yield efficiency of 95%. Efficiency and yield are maximized by reaction of chemical reactants in their concentrated form. These reaction conditions favor the immediate formation of chlorine dioxide and therefore minimize byproduct formation found in other types of generators. Recognized by the EPA as a primary disinfectant, chlorine dioxide is a powerful disinfectant and oxidizing agent. Chlorine dioxide has proven economical and effective when treating waters high in ammonia, manganese or organic content and in destroying phenol-based taste and odor-causing compounds. It is effective in controlling a broad spectrum of viruses, bacteria and protozoa like Giardia and Cryptosporidium. Chlorine dioxide does not form trihalomethanes (THMs), trihaloacetic acids (THAAs) or other chlorinated organic compounds, nor will it react with many impurities that normally consume chlorine. And as it is essentially unaffected by pH, onsite chlorine dioxide generation is a cost-effective means of treating waters high in pH. Chlorine dioxide is also very effective in controlling biofilms, preventing nitrification and extending the life of chloramines in the distribution system. Furthermore, it does not oxidize bromide to bromate, and can be a valuable aid in providin g CT (concentration x contact time) credits and in serving as a pre-oxidant applied to raw water to reduce the demand on downstream ozone dosages. The Millennium chlorine dioxide generators can be wall-mounted, cabinet-mounted or stand-alone, and are available in three configurations: manual, flow-pacing batch (for multiple injection points), or state-of-the-art fully automatic EC series. Provided in various configurations, standard capacities can range from 10 to 25,000 pounds per day with a 10:1 turndown ratio and an infinite turndown when using the flow-pacing batch systems. Two and three chemical versions are available. All use a standard modular design and a small installed footprint suitable for application where space is a premium. Custom-built generation systems are also available upon request. Millennium III is a licensed trademark under which chlorine dioxide systems are sold by USFilter and/or its affiliates. The Millennium III generators are part of Siemens Water Technologies' disinfection product line. The Millennium III series generators help communities meet compliance with the USEPA's Stage 2 Microbials/Disinfection Byproducts (M/DBP) cluster of rules Siemens Water Technologies including the USFilter Group of Companies delivers cost-effective, reliable water and wastewater treatment systems and services to municipal, industrial, commercial and institutional customers worldwide. The division "Water Technologies" is part of Siemens' Industrial Solutions and Services Group (I&S) which is a system and solution provider for industrial and infrastructure facilities. Visit company website http://www.siemens.com/water © Copyright 1998 - 2009 Water and Wastewater.com |
