Containment of Textile Waste Using a Geomembraneby Michael W. Bowler, Geo-Con Inc, Pittsburgh, PA, USA,
Abstract: A wastewater treatment plant for a textile mill incorporated two 2. 7 million gallon aeration ponds which had originally been lined with clay. The clay liner leaked and caused the formation of sinkholes in the limestone substrata; this necessitated the redesign of the liner with a specified leak rate of 2. 7 gallons/min/pond to prevent further sinkhole formation. The new design called for a synthetic membrane liner with a full leak detection system so that any holes could be detected and, if necessary, repaired immediately. The liner chosen was high density polyethylene with an extrudate fusion welding system for the seaming. Each pond had four concrete structures in the form of two outlet pipes, an inlet and an access slab. The fixing of the liner to these structures was accomplished with stainless steel battens, anchor bolts and expanded neoprene gasketing. The installation was carried out with a strict quality control program for the seaming, membrane integrity and bolting detail to structures.
Subject Headings: Membranes | Clay liners | Pipe leakage | Linings | Synthetic materials | Wastewater treatment plants | Fabrics | Ponds
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