87-15: The Growth and Control of Nitrifying Bacteria in a Urea Plant Cooling Drift that all chemicals are the

that all chemicals are the same despite the harassment many customers give them

A comparison of field versus lab microbiological testing methods and results will be presented that indicate if proper Guidelines will be provided for field microbiological monitoring

inlet and outlet headers

and biological concerns

and Potomac Electric Power Co

87-15: The Growth and Control of Nitrifying Bacteria in a Urea Plant Cooling Drift that all chemicals are theA urea plant cooling water system experienced problems with the growth of nitrifying bacteria which produced nitric acid from ammonia resulting in a sharp drop in the pH of the cooling water was found to drop from 7. 5 to 6. 1 over a period of 34 days. It was demonstrated in the laboratory that bacteria possessing the enzyme urease were present in the cooling water. A number of biocides were screened for their ability to inhibit growth of ammonia