Case Study: Cooling Water Disinfection at Major Canned Food Producer in USA
March 11 2015Can cooling is a critical step in the overall canning process and requires the use of a biocide to ensure that the cooling waters remain microbe free. Canning system cooling waters often present a uniquely challenging disinfection environment due to high organic load in the water from burst cans, the open environment, and warm temperatures - all of which are factors that encourage the growth of bacteria.
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Disinfection of Simulated Cooling Tower Water
March 04 2015Cooling tower waters tend to be breeding areas for bacteria that cause human disease, aswell as biocorrosion or biofouling of the cooling tower. A study was conducted to determine the effectiveness of mixed oxidants (MIOX) versus sodium hypochlorite (NaOCl) in the inactivation of Bacillus stearothermophilus, Pseudomonas aeruginosa, and Legionella pneumophila. The two disinfectants were compared with and without addition of bromide, which is frequently added to cooling tower waters:
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Biofilm Removal Synopsis
March 04 2015Biofilm is a substance that forms readily in water distribution lines, water storage tanks, and any other aqueous environment. A Biofilm forms when bacteria begin to excrete a slimy, sticky substance that allows them to adhere to surfaces. The biofilm mass usually consists of many species of bacteria, and can also include fungi, algae, and protozoa. Biofilm is resistant to chlorine and is difficult to remove once initial adhesion occurs. The biofilm slime shelters disease-causing microorganisms, protecting them from chlorine disinfection. In addition, biofilm exerts an oxidant demand, consuming chlorine residuals in the distribution line and requiring higher doses at the treatment station for residual maintenance at the end of the line.
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Legionella Control in Cooling Tower Water Treatment
March 04 2015MIOX has performed comparative water disinfection studies using 3 oxidizing biocides and 3 commonly used non-oxidizing biocides against Legionella pneumophilia. The organism L. pneumophilia is known to be pathogenic and commonly resides within biofilms in cooling tower water and potable water treatment systems. Model cooling tower waters were used in a comparative efficacy study and disinfection was evaluated at pH 7.0 and 8.5. Due to the slow-acting nature of non-oxidizing biocides, L. pneumophilia inactivation was observed over an 18 hour period, with samples obtained after 0.5, 1, 4, and 18 hour exposure times to the various biocides.
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Case Study: NIPSCO Power Plant Cooling Towers
February 18 2015National Pollutant Discharge Elimination Permit (NPDES) restrictions limited cooling tower disinfection dosage to only two hours a day for each tower. During the warm weather summer months, the 2 hour/day restriction did not allow enough dosage to control microbiological growth in the cooling water. NIPSCO’s Chemical and Environmental Compliance Department was using a chemical regimen of sodium hypochlorite, sodium bromide, and a photosynthesis blocker (or algaecide) to treat water supplied to four cooling towers at the 1780 MW coal-fired power plant. The cooling water was allowed to reach 2-3 cycles of concentration, with the cooling tower blowdown being discharged into a 200-acre settling pond before discharged into the Kankakee River.
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Alternative to Bromine Improves Cooling Water Microbial Control and Overall Treatment
February 18 2015Ammonia in the cooling loop poses an additional challenge for hypochlorite or oxidizing biocides in controlling the microbiological activity since chloramines are typically seen as less effective biocides as compared to free chlorine. Often, cooling tower biocidal treatment is accomplished with bromine based non-oxidizing biocides coupled with the occasional application of isothiazolin or gluteraldhyde. This paper demonstrated that Mixed Oxidant Solution (MOS), a biocide produced through the electrolysis of sodium chloride brines, is a highly effective biocide. Without overcoming ammonia, and in high pH environments, MOS was able to successfully control the microbial populations in the cooling tower waters of a major semiconductor facility in the US, where ammonia contaminated wastewater is used as part of the makeup water for cooling towers.
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How Stripping Biofilm From the Cooling Water Loop Impacts Power Plant Production Output
February 11 2015Read
MIOX and Operation Blessing Bring Safe Drinking Water to Philippines for Disaster Relief
November 15 2013Albuquerque, NM - November 15, 2013 - MIOX Corporation, the industry leader in on-site chemical generation technology, has partnered with Operation Blessing International (OBI), one of the largest charities in America, for disaster relief efforts in the Philippines following Super Typhoon Haiyan.
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Veolia signs agreement to distribute MIOX technology
October 07 2013Albuquerque, NM - October 7, 2013 - MIOX Corporation, the industry leader in on-site chemical generation technology, announces they have signed a distribution agreement with Veolia Water Solutions & Technologies for cooling tower water treatment, wastewater reuse, industrial water treatment and downstream oil and gas water applications. This partnership joins two industry experts and marks a major milestone for both Veolia and MIOX.
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TEL Venture Capital Invests in MIOX Corporation
June 04 2013Albuquerque, NM - June 4, 2013 - MIOX Corporation today announced a strategic investment by TEL Venture Capital, Inc., the corporate investment arm of Japanese semiconductor capital equipment manufacturer Tokyo Electron Ltd. This marks the first investment by an Asia-based investor in MIOX.
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