The aim of the project is to develop an efficient method of wastewater treatment based on one-way, biocenotic flow bioreactors equipped with effective biological carriers, removing chemicals from the environment showing negative effects on the health and quality of life of humans and animals. The effluent treatment plant in the technology proposed by the applicant will remove chemical and physical impurities present in municipal, domestic and industrial waste water, eliminate pathogenic microorganisms, including spore forms, and significantly reduce the emissions of active sludge into the environment. Proper operation of modern cleaning systems requires control of a number of parameters and indicators. Extensive quality control of wastewater during the treatment process is important in the intensification of its individual stages. During the project, the applicant will conduct physicochemical and microbiological studies of untreated and treated waste water. The applicant’s technology is not an active sludge technique. The applicant is based on biochemical processes carried out by microorganisms in nature. Number_reference_aid_programme: SA.41471(2015/X) Purpose of public aid: Article 25 of Regulation (EC) No 651/2014 of 17 June 2014 declaring certain categories of aid compatible with the internal market in the application of Articles 107 and 108 of the Treaty That’s it. EU L 187/1 of 26.06.2014).