BOOK REVIEWS

摘要

Use of natural waste water treatment systems often results in sustainable systems because of the low operating requirements and a minimum of biosolids production. Natural systems such as wetlands, sprinkler or drip irrigation and groundwater recharge also result in water recycling and reuse. The second edition of Natural Wastewater Treatment Systems incorporates current design and regulatory and operational developments in the natural wastewater treatment field. It is organised into ten chapters. After an overview on natural wastewater treatment systems, chapter 2 introduces the planning procedures, feasibility assessment and site selection whereas chapter 3 deals with the basic processes and treatment mechanisms responsible for treatment in ponds, wetlands, land applications, and soil absorption systems. Design criteria and methods of pond treatment and pond effluent upgrading are presented in chapters 4 and 5, with specific reference to removal of nitrogen, phosphorus and a number of emerging contaminants (e.g. Pharmaceuticals, personal care products and antibiotic resistant genes). Free water surface, subsurface and vertical flow constructed wetlands, including design procedures, process applications and treatment performance data are described in chapters 6 and 7. Land treatment concepts and design equations are described in chapter 8. Residuals and biosolids management and treatment are presented in chapter 9. A discussion of on-site wastewater management, including nitrogen removal pretreatment methods, is presented in chapter 10. In all chapters, U.S. customary and metric units are used.