The book deals with the technology and equipment for a wastewater treatment. Besides, the author proposes new flotation process models of water purification. Basing on new theoretical foundations of the flotation process, new types of equipment have been developed.  They are called Ksenofontov's flotation harvesters. These installations differ from the existing ones in that all units are located in one housing and at the same time, several processes with well-coordinated hydrodynamic modes are used. In addition, such tasks of water purification as water purification per se and sludge treatment with obtaining its dehydrated form are successfully solved in such installations. These solutions are implemented with high efficiency and low material and economic costs. Significantly, Ksenofontov's flotation harvesters are original and patented, they represent world novelty in green solutions.

The book is written in simple terms and all ideas are presented clearly. In general, the book is valuable and rewarding.