METHOD AND INSTALLATION FOR PURIFYING EFFLUENTS THAT ARE AT LEAST PARTIALLY BIODEGRADABLE

摘要

The invention relates to a method of purifying effluents which are at least partially biodegradable and which are exempt from toxic products comprising the aerobic and/or anaerobic biological treatment of said effluents which causes the formation of sludge. The inventive method consists of the following steps: a) recovery of the sludge that has been mixed either with the treated effluents or with a liquid feed; b) at least one step involving the filtration of the mixture in order to eliminate particles that are greater than or equal to 140 mu m approximately; and c) supplying under pressure the mixture thus filtered to a micro-irrigation network in an area planted with vegetables in which said mixture constitutes a growth fertiliser.