Dynamic membrane technology has been extensively researched, with particular reference to industrial effluent treatment. Two major plants have been commissioned in the wool scouring and textile dyeing industries. The results of the operation of these plants have shown that product water of a reusable quality was produced. In the case of wool scouring effluent, an average flux of 37 l/m 2 .h could be maintained under correct operating conditions. Recent trials on the treatment of rinse liquor from a wool processing plant has shown that an average flux of 80 l/m 2 .h can be maintained, provided that the membranes are reformed on an approximately two-weekly cycle