The past 30 years have seen the emergence of a growing desire worldwide to take positive actions to restore and protect the environment from the degrading effects of all forms of pollution: air, noise, solid waste, and water. The Handbook of Environmental Engineering series guides readers to answer the fundamental questions facing pollution in the modern era - How serious is pollution? Is the technology needed to abate it not only available, but feasible? Among the topics included in this, the sixth edition, are: biosolids, flotation thickening, anaerobic and aerobic digestion, pressurized ozonation, lime stabilization, elutriation and polymer conditioning, and animal waste treatment. Cutting-edge and highly practical, the Handbook of Environmental Engineering, Volume Six, offers educators, students, and engineers a strong grounding in the principles of environmental engineering, as well as providing effective methods for developing optimal abatement technologies at costs that are fully justified by the degree of abatement achieved. With an emphasis on using the best available technologies, the authors of these volumes present the necessary engineering protocols derived from the fundamental principles of chemistry, physics, and mathematics, making these volumes essential references for environmental pollution researchers.