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In December 2000, the Bonita Springs West Water Reclamation Facility (WWRF) experienced sludge bulking problems. The poor settling sludge was identified as the cause of elevated turbidity and effluent suspended solids, requiring effluent to be sent to reject ponds. The bulking problem, caused by the filamentous organism Type 021N, was quickly corrected. The system continued to experience poor performance, however, which was attributed to the presence of an inhibiting substance that negatively affected nitrification.

A comprehensive plan to evaluate the process issues was developed and included two parallel sets of activities. One set of activities was directed toward locating and eliminating the inhibiting substance. The objectives of the second set of activities were to improve plant operations immediately, establish plant treatment capacity, and determine guidelines for plant operation under inhibited and non-inhibited conditions. This paper presents the different analyses performed and describes the results of these analyses.
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Document Type: Research Article

Publication date: 2002-01-01

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