Natural Wastewater Treatment Systems (2^nd Ed.)

Calling for ecologically and economically sound wastewater treatment systems, the authors of Natural Wastewater Treatment Systems explore the use of wetlands, sprinkler or deep irrigation, groundwater recharge, and other natural systems as sustainable methods for the treatment and management of wastewater. Based on work by prominent experts in natural waste treatment, this text provides a thorough explanation on how soil and plants can successfully sustain microbial populations in the treatment of wastewater. Determining that natural systems cost less to construct and operate, and require less energy than mechanical treatment alternatives, this book also explains how these processes produce lower amounts of residual solids, and use little or no chemicals.

What?s New in the Second Edition:

This revised edition includes current design and regulatory and operational developments in the natural wastewater treatment field. It provides detailed examples and analyses along with significant operational data in each chapter. It also considers how processes provide passive treatment with a minimum of mechanical elements, and describes new approaches to partially mixed ponds, including dual-powered aeration ponds.

• Introduces the planning procedures and treatment mechanisms responsible for treatment in ponds, wetlands, land application, and soil absorption systems
• Provides new case studies of constructed wetlands and water reuse systems
• Presents design criteria and methods of pond treatment and pond effluent upgrading
• Describes constructed wetlands design procedures, process applications, treatment performance data, and land treatment concepts and design equations
• Includes information on constituents of emerging concern (CEC) and their fate in natural systems

The text discusses wastewater pond systems, free water surface constructed wetlands, subsurface and vertical flow constructed wetlands, land treatment, sludge management, and onsite wastewater systems. It describes residuals and biosolids management, including nitrogen removal pretreatment methods, and uses U.S. customary and metric units in all chapters. It presents case studies of new applications of natural systems and includes worked examples of design equations for ponds and land treatment. It also provides a biosolids regulatory update from a top EPA scientist, and algae reduction technologies for ponds and wetlands.

Designed for practicing wastewater engineers and scientists involved in the planning, design, and operation of ponds, wetlands, land treatment, biosolids, and onsite soil-based treatment systems, the book integrates many natural treatment systems into one single source.

Natural Wastewater Treatment Systems: An Overview. References. Planning, Feasibility Assessment, and Site Selection. References. Basic Process Responses and Interactions. Design of Wastewater Pond Systems. Pond Modifications for Polishing Effluents. Methods. References. Free Water Surface Constructed Wetlands. Subsurface and Vertical Flow Constructed Wetlands. References. Land Treatment Systems. References. Sludge Management and Treatment. Systems. References. On-Site Wastewater Systems. References. Appendices. Index.

Ronald W. Crites is a senior associate with Brown and Caldwell in Davis, California. He consults on land treatment, water recycling and reuse, constructed wetlands, biosolids land application, decentralized wastewater treatment, and industrial wastewater land application systems. He received his BS in civil engineering from California State University in Chico and his MS and engineer’s degree in sanitary engineering from Stanford University. He is the recipient of the 2009 Camp Applied Research Medal from Water Environment Federation for innovation in natural systems. He has 44 years of experience in wastewater treatment and reuse experience. He has authored or coauthored over 200 technical publications, including seven textbooks. He is a registered civil engineer in California, Hawaii, and Oregon.

E. Joe Middlebrooks