TERRACED FLUID FILTER FOR SEWERAGE, WASTE AND STORMWATER RUNOFF

摘要

A filter arrangement (12) for separating pollution from fluid is described as comprising an array of filter elements (34, 36) arranged such that each successive filter element is forward, with respect to the flow of fluid, and below the level of the top surface of the previous filter element. Such an arrangement can be described as a stepped or terraced array of filter elements. Troughs (24a, 24b) can be located between each filter element (34, 36) so as to collect pollution that passes over a filter element and these troughs are arranged to direct the captured pollution to a holding chamber and eventually to a pollution outlet. Filtered fluid is directed to an outlet for possible further treatment. Such a filter arrangement is suitable for many uses including primary sewerage treatment which contains not only solid waste but also fine paper fibres.