As indicated in Chapter 1 of this book, land application of sewage sludge and biosolids has been practiced for centuries. Over the past 40 years, I have been involved in various aspects of organic matter and soils. Since 1972, I have researched, studied, and published on various aspects of biosolids management, concentrating on composting and the public health aspects of land application. I have been an active member on the Water Environment Federation Residuals Committee and The . Composting Council Board of Directors. In 1977, I published a book titled The Science of Composting.
