Zhukova V. Wastewater treatment from nitrogen compounds using immobilized microorganisms

The thesis deals with the development of wastewater treatment technology from nitrogen compounds using immobilized microorganisms with high efficiency removal of nitrogen compounds in ensuring effective rules, minimal power consumption and small wastes volume. The technological parameters of the bioreactors with immobilized microorganisms in fibrous media for effective removal of nitrogen compounds has been determined: hydraulic load, duration the process, the thickness of biofilm, biomass concentration, the load for ammonia nitrogen, the rate of oxidation of ammonia nitrogen, oxidative capacity. The mathematical model of the aerobic process of wastewater treatment from ammonium nitrogen using immobilized microorganisms has been developed, which allows determining the limiting factor at each stage of the process of wastewater treatment. It has been determined that the perpendicular direction of the air jets movement of wastewater and longitudinal in relation to the carrier of microorganisms allows to increase the oxidative capacity of the bioreactor with immobilized microorganisms in the initial stage of the aerobic process by 30-40%. It has been presented, that the wastewater treatment process in the construction with immobilized microorganisms can be carried out periodically and with changes of ambient temperature with the restoration of aquatic biomass. The anaerobic-aerobic wastewater treatment technology from nitrogen compounds with immobilized on fibrous medium microorganisms is proved to be practicable. The technological regimes, parameters of the fibrous media "VIA", constructive and technological parameters of bioreactors with immobilized microorganisms have been determined ensuring the implementation of the technology at wastewater treatment plants. The anaerobic-aerobic technology of biological wastewater treatment from nitrogen compounds using immobilized microorganisms has been implemented at the treatment plant company "Slavutskiy malting plant" (act of introduction).