Water Reclamation and Reuse for Environmental Conservation

The strategy for long-term planning and management of water resources is more and more being based on the renovation and utilization of wastewater for use in agricultural and landscape irrigation as well as in industrial production. Conventional wastewater treatment, even when it is economically feasible, is costly because of biosolids handling and tertiary sedimentation tanks. A newly developed flotation/filtration cell is an advanced water clarification package plant, using a combination of chemical flocculation, dissolved air flotation (DAF), and rapid granular filtration in one unit. The average processing time from start to finish is less than 15 min. This innovation replaces a conventional process requiring five separate tanks with a single, compact, and cheaper unit. The aim of this chapter is to discuss six applications that illustrate the versatility and effectiveness of the flotation/filtration cell, to demonstrate the performance of the compact unit in secondary and tertiary treatment of various wastewater effluents, and to illustrate the system’s usefulness for wastewater reclamation, recycling, and reuse.