The textbook provides the classification and characteristics of the main types of environmental pollution, considers the basic laws of engineering protection of the atmosphere, hydrosphere, lithosphere from chemical and physical types of pollution. The description of the main chemical, physico-chemical and biochemical processes of wastewater treatment and protection of the lithosphere from waste is given, the mechanical processes of processing liquid and solid waste are considered. The textbook is intended for university students studying in the field of training "Technosphere safety". It can be used by practitioners in postgraduate education and advanced training systems.