A pilot-scale percolating filter for use in sewage treatment studies

A pilot-scale filter is described which can be quickly and easily constructed, even by those with limited engineering skills, using materials most of which are likely to be available in the stores department or on the site of a normal sewage works. It is robust, durable, easily modified and produces a well purified effluent using either mineral or random plastic media at conventional loadings. The simple design offers a low cost, reliable and versatile pilot-filter system suitable for a wide range of research, evaluation and development work.