Automatic control system for dosing chemicals to a sewer system

摘要

AUTOMATIC CONTROL SYSTEM FOR DOSING CHEMICALS TO A SEWER SYSTEM A process and system for determining injection rate of treatment chemicals to eliminate or reduce downstream noxious gas emissions in a wastewater collection system. The process and system provides for treatment chemical injection at a pumping station or directly on a force main wherein dosage is calculated based on current and historical data relative to the pumping station. From Block 110, Fig. 2 When well is filled: 121 Record TirneOut Reset TimeOut_1 timer Start Pump Start TimeOut_2 timer 122A Is TimeOut_1I> T! Maintain or return to dry Maintain or return to wet weather mode weather mode Set K~rain = 1 ) C __Evaluate actual residency time Set Krain ISet K-rain<1I When wet well is empty: Record TimeOut_2 Reset TimeOut_2 timer 123 Stop Pump Start TimeOut 1 Timer YES Is NO0 TimeOut_2 < T2 Maintain or return to dry Maintain or return to wet weather mode weather mode Set K rain = 1 To Block 130, Fig. 2 FIwlG.9 3