Preface. Sewage treatment in helophyte beds - first experiences with a new treatment procedure, K Bucksteeg. Use of water hyacinth in tertiary treatment of domestic sewage, M C H Araujo. The applicability of the wastewater treatment plant in Othfresen as scientific documentation of the root-zone method, H Brix. A high organic load stabilization pond using water hyacinth - a "Bahia" experience, E J Santos et al. Domestic wastewater treatment in tanks planted with rooted macrophytes: case study description of the system design criteria and efficiency, C Boutin. The Hornsby Bend hyacinth facility in Austin, Texas, R Dinges & J Doersam Experimental investigations into the use of emergent plants to treat sewage in South Africa, W V Alexander & A Wood. tate-of-the-art utilization of aquatic plants in water pollution control, K R Reddy & T A Debus . The fight against eutrophication in the inlet of "Odense Fjord" by reaping of sea lettuce (Ulva lactuca) , O T Frederiksen. Utilization of water hyacinth for removal and recovery of silver from industrial wastewater, C L R Pinto et al. Treatment of textile industry waste using water hyacinth, R K Trivedy & V R Gudek r. Water hyacinth (Eichhornia crassipes) in ruminant nutrition, A L Abdalla et al. Purification of pisciculture waters through cultivation and harvesting of aquatic biomass, C Simeon & M Silhol. Incorporation of cadmium by water hyacinth, G Blake et al. Pilot-scale experiments in water hyacinth lagoons for wastewater treatment, H Kawai et al. Subject index.