August 20, 2019
Author: E. S. Beardwood. International Water Conference 2016, Paper Number IWC 16-22. Engineers’ Society of Western Pennsylvania, https://eswp.com/water/conference-archives/
ABSTRACT: A novel approach to onsite, high purity generation of a monochloramined amine (MCA), when applied to cooling waters, has revealed equivalent performance attributes as associated with chlorine dioxide applications for planktonic and sessile biological control. Loss of biocide feed and subsequent loss of planktonic and sessile biological control can be easily restored without the assistance or co-use of biodispersants/biopenetrants and non-oxidizing biocides. During process inleakage of hydrocarbons, ammonia, amines, and hydrogen sulfide, biological growth regeneration will increase; however, it is only the biological activity that provides the demand on the biocide, as it is a mild and selective oxidant like chlorine dioxide. Hence overall system-wide biocide demands are far less with this novel approach to biological control in cooling waters, allowing for microbiological control under very stressful conditions. That is, the corrosion rates, heat exchanger heat extraction rates and cooling tower heat rejection rates were maintained within acceptable limits, even though run through upsets had been incurred. The results of the application and surveillance work will be provided in this paper.