§ Mr. Dalyellasked the Minister of Technology whether, in view of the fact that United States cities such as Chicago, Toledo, Pasadena, and Milwaukee make contracts for their sewage sludge to be converted into high-grade fertiliser, returning valuable humus to the soil, he will initiate a study of the feasibility of using such techniques in Great Britain.
§ Mr. FowlerNo; use of sludge as a fertiliser is a traditional method of disposal in the United Kingdom. Some sewage works dry the sludge and add supplementary nutrients to make it more acceptable to farmers and gardeners. But this technique has limited applications.138W It is usually more economic to dispose of sludge in wet form.