Abstract
ABSTRACTThe Environment Agency have proposed that daily flow volume discharged from small wastewater treatment works should be capable of being measured to an accuracy of ±8%, where the daily totalised flow volume is estimated to be greater than 5m3. It is estimated that every water company in the UK has several hundred small wastewater treatment works that will be required to be equipped with the capability of measuring the released daily totalised flow volume for specified periods. This paper investigates the feasibility of modifying existing dosing syphons, which are present within many of these works, to operate as flow measuring devices. Laboratory testing of a full‐scale syphon demonstrated that by the addition of two water level detectors and a data logger to monitor the filling part of the syphon cycle, it is possible to accurately calculate the daily totalised flow volume within the Environment Agency’s proposed performance criteria.
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