Abstract. Maintaining the stable operational mode of groundwater intakes and increasing their operation period is an urgent task of urban water pipelines operating. The problem of the water supply to consumers can be solved in the process of managing the operation modes of water intakes. We consider the negative developments in the functioning of groundwater intakes. The purpose of this research is to improve the existing schemes of water supply in Pure Water Reservoir through pressure pipelines of groundwater abstraction and increase the productivity of submersible pumps. Inside the wells various pumps can be installed, characterized by the pressure and performance. Submersible pumps at nominal flow supply have maximum efficiency, so the most favorable for the pump is work to a tank of clean water. The layout of wells and common culvert is shown.Monitoring of water intakes allows setting technical parameters for selecting an independent scheme, choosing the right equipment, taking into account the joint operation of the well system -submersible pump -prefabricated water conduit -Pure Water Reservoir. Based on the results of theoretical and practical studies, a mathematical model of the energy efficiency of the system operation is proposed: a water well -Submersible Pump -collecting conduit. Reviewed the mutual influence of the operating mode of individual wells and precast culvert under various schemes of connection of pressure. Most preferred is a diagram of feed water in the basin with clean water by a separate pressure lines, in this scheme ruled out mutual influence of the operating mode of individual wells. Energy-efficient operation of the water intake with separate pressure lines must be assessed by comparing the total energy consumption in the system.

Microbial fuel cells make it possible to generate electricity by eliminating and using wastewater components. For these purposes, the most viable microbial associations in microbial fuel cells. The presence of strains of different microorganisms allows you to consume a much wider range of compounds. Multicomponent makes them more resistant to the negative effects of stressful environmental factors. An example of such associations are silt sediments of biological treatment plants. The purpose of this work was to create a new microbial association. Microbial association was formed from previously isolated strains from activated sludge from the petrochemical plant, Micrococcus luteus and Serratia marcescens. Model wastewater was taken as substrates. The generation of electricity was carried out in microbial fuel cell models that we developed. These designs allowed access to the contents of microbial fuel cells without violating sterility and anaerobic conditions in the anode chamber. In the experiments, the voltage, current in microbial fuel cells were measured and the power was calculated. Experiments have shown high electrogenic activity when working together with Micrococcus luteus and Serratia marcescens cohosts for a good variety of the proposed bioagent complex. The search and isolation of energy-efficient strains and the compilation of a new consortium from them will not only increase the current output in microbial fuel cells to more significant values, but also bring such microbial fuel cells into the category of promising developments for alternative energy. This work was supported by the Ministry of Education and Science of the Russian Federation (project RFMEFI58317X0060 “Bioremediation and bioconversion of waste using a complex of photosynthetic organisms and heterotrophs in aerobic and anaerobic conditions with bioenergy generation”).

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Experimental studies on the decontamination and stabilization of sludge were carried out using the product “Desolak”, which is calcium oxide treated with a disinfectant. As a result of the research, it was found that the sewage sludge of Voronezh is safe and can be used as organic fertilizer for growing agricultural plants. The determination of the content of mineral nutrients in the soil and the soil reaction showed that the application of organic fertilizers in the form of sludge in comparison to the variant without fertilizers increases the content of nitrogen nitrate, exchange potassium, and mobile phosphorus in the soil. At the same time, the mass fraction of impurities of toxic elements in the soil decreases when sewage sludge is added as an organic-lime fertilizer.