The current information in the field of wastewater from phosphates and nutrients removal. The paper presents the results of research aimed at understanding the deep removal of phosphates from household wastewater. Provides a method for wastewater treatment using reinforced boot material. In this paper, we investigated metal corrosion in iron-loading materials under different operating conditions. The paper presents the results of scientific work dedicated to the removal of ammonia nitrogen from wastewater. Based on the results of research were built characteristics of the process of biological treatment with nitrification and denitrification of. The paper presents charts showing the operation of the cleaning system with nitrifying bacteria heterotrophs. The results of studies of processes of wastewater treatment from biogenic elements at small treatment plants that operate in seasonal mode are presented. © The Authors, published by EDP Sciences.