Driffield Sewerage and Sewage‐Treatment Projects

In: Water and environment journal, Band 13, Heft 2, S. 121-126

Abstract

ABSTRACTThe town of Driffield (in the East Riding of Yorkshire) has several combined‐sewer overflows which cause nuisance during rainfall. A new interceptor sewer has been laid and the sewage‐treatment works has been reconstructed to improve the water quality in the receiving watercourse. The sewerage scheme was mainly constructed using trenchless technology to reduce the risk of ground settlement in the narrow streets and to avoid contamination of the underlying aquifer. The existing biological filters were replaced with a new four‐basin cyclic activated‐sludge plant. This process achieves biological treatment within a single reactor basin which operates typically on six 4‐h cycles per day and without the need for separate primary and final settlement tanks.