The paper presents the results of studies on increasing the efficiency of wastewater treatment from nitrogen compounds during the re-engineering of sludge bioreactors with the use of contact carriers for biomass immobilization. To assess the contribution of the indicative species of microorganisms involved in the processes of nitrification and denitrification, an analysis of the indices of species diversity by functional zones was carried out. The results of the operation of the bioreactor are given when using reticulate contact carriers in the form of partitions to separate the functional zones. It was noted that the oxidation-reduction potential of the bioreactor in nitrogen increased 1.7 times after re-engineering.

Проанализированы причины критических ситуаций на очистных сооружениях коммунального водоотведения. Проведено обследование локальных очистных сооружений микрорайона в критической ситуации отказа и определены проблемы, обусловленные сбросом либо недоочищенных, либо полностью неочищенных сточных вод в водоём. Для восстановления функционирования очистных сооружений разработан оптимальный технологический режим с учетом изменения подачи воздуха, ввода биопрепаратов, добавления пероксида водорода и использования светодиодов в аэробной части сооружений. The causes of critical situations in sewage treatment plants for municipal water disposal are analyzed. A survey of local treatment facilities of the microdistrict in a critical failure situation was carried out and problems were identifi ed, caused by the discharge of either under-treated or completely untreated sewage into the reservoir. To restore the functioning of treatment facilities an optimal technological regime has been developed, taking into account changes in air supply, introduction of biologics, addition of hydrogen peroxide and the use of LEDs in the aerobic part of structures.

The results of a survey of the background parasitic characteristics on individual structures of the municipal sewage treatment plant are given. It is established that 27% of the grids and sand trap are retained, the effectiveness of the retention in the biological treatment facilities after the secondary settling tank corresponded to 61.9%. Helminth eggs are mostly concentrated in sewage sludge, to a large extent maintaining their viability (90%). An imitating model of the process of disinvasion of sewage and sediments was developed, represented by a network diagram for sewage treatment fa-cilities. In production conditions, an experiment was performed to determine the influence of exter-nal factors on the efficiency of dehelmintization by the plant reagent.