DYNAMIC BLOWER DESIGN - USING MODELING TO ESTABLISH THE BLOWER OPERATING WINDOW UNDER VARYING LOADING SCENARIOS

摘要

The San Jose Creek East Water Reclamation Plant (SJCWRP) is a tertiary treatment plant designed to treat 237 ML/d (62.5 MGD) with the actual dry weather flow being around 164 ML/d (43.3 MGD). As part of a planned upgrade of the plant's aeration system, SJCWRP contracted inCTRL Solutions Inc. to undertake a modeling and simulation study to support decision-making during the project. An integrated dynamic model of the treatment process, the aeration system, and the process controls was developed in SIMBA#. The model was used to determine the cause of effluent ammonia spikes, to develop system curves for the aeration piping network, to select the best blower curve from the manufacturers' options, to test a proposed blower control strategy and find the location of the most-open valves, and to identify pipes causing relatively large pressure drops in the system. The integrated dynamic model of the process and its aeration system allowed analysis of the system under realistic dynamic loading and accounted for interactions between the treatment process, the aeration system, and the aeration system controls. This type of analysis is not possible if the different systems are modeled separately and at steady-state conditions only. The work is significant because it shows the benefits of using an integrated model of a water resource recovery facility, that includes a detailed and fully dynamic aeration piping network model, when analyzing and upgrading aeration systems and their controls.