ch. 1. Characteristics of the cavitation phenomenon -- ch. 2. The physical basics of hydrodynamic cavitation -- ch. 3. Sonochemical processes in support of oxidation processes -- ch. 4. Problems and conditions in the generation of hydrodynamic cavitation -- ch. 5. The study of hydrodynamic cavitation in the laboratory -- ch. 6. The use of cavitation to aid the water treatment process and effluent decontamination -- ch. 7. The decomposition of persistent organic pollutants using hydrodynamic cavitation -- ch. 8. The application of cavitation to intensify technological processes -- ch. 9. Application opportunities for hydrodynamic cavitation in environmental engineering technologies.