Explanation
This legislation authorizes the Finance and Management Director to enter into a contract with Bonded Chemicals, Inc. for polymer for water treatment at the Hap Cremean Water Plant. The Hap Cremean Water Plant is in the process of preparing to undertake a series of concurrent pilot-scale demonstration studies designed to improve treatment for disinfection. This project is part of a capital improvements project managed by Burgess & Niple, Inc. Among other engineering responsibilities, the consultant team was contracted to perform an evaluation of methods of optimizing the existing treatment processes at the Hap Cremean Water Plant.
One of the purposes of the upcoming pilot-scale demonstration studies is to evaluate the performance of the processes being demonstrated at the pilot-scale level against existing conventional treatment. A series of bench-scale tests were performed by the consultant, in concert with City of Columbus employees, to determine chemical feed rates that best optimize the existing system using chemicals currently used at the Hap Cremean Water Plant. Following this, a second phase of testing was conducted to evaluate alternate chemicals. Among the tests performed as part of this second phase were a series of coagulant-aid polymers.
In order to have a wide variety of polymers to evaluate, the consultant contacted polymer suppliers to obtain samples for this study (list of suppliers attached on waiver form). Each supplier was asked to provide as many samples as they could for consideration. A total of twenty polymers were made available by the suppliers at the time of testing and were used in the test evaluation.
Based on the findings from this phase of bench-scale tests, the consultant recommended that either of the two best performing polymers should next be evaluated at full-scale to further verify performance. The full-scale testing is to be performed on one-half of the overall plant production.
The schedule f...
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