Processes of biological wastewater treatment for nitrogen, phosphorus removal by immobilized microorganisms

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.127058

Keywords:

anaerobic, anoxic and aerobic bioreactors, immobilized microorganisms, biotechnology, nitrogen and phosphorus removal

Abstract

Parameters of the biotechnology of wastewater treatment for nitrogen and phosphorus removal using immobilized microorganisms are investigated. The acutest problem of municipal wastewater treatment is the low removal efficiency of biogenic compounds, namely nitrogen and phosphorus. Exceeding the discharge norms for nitrogen and phosphorus compounds leads to a dangerous ecological situation in water bodies of Ukraine. The intensity of transformation of nitrogen and phosphorus compounds is limited by the rather low growth rates of nitrifying bacteria (0.25–0.35 day-1), sensitivity to pH fluctuations (the value of 6.5–8 should be maintained), competitive relations with heterotrophs. It is advisable to use immobilized microorganisms to increase the concentration of nitrifying bacteria and create favorable conditions for biomass development. The perpendicular air flow in relation to wastewater flow in the aerobic bioreactor zone, which provides the oxidation capacity by ammonium nitrogen of up to 120–130 g/(m3∙day), is investigated. It is established that the specific oxidation rate of organic matter in municipal wastewater treatment reaches 25 mg COD/(g/day), providing COD treatment efficiency of up to 90 %. The efficiency of wastewater treatment for ammonium nitrogen removal at an initial concentration of 30–50 mg/dm3 is 97.3–99 %. The sequence of anaerobic-anoxic-anaerobic-aerobic processes, which provides the efficiency of wastewater treatment for removal of organic pollutants of 90–95 %, ammonium nitrogen 97–99 % and phosphates 93–95 %. with the treatment duration of up to 4 hours is studied.

Author Biographies

Maria Blyashyna, National University of Water and Environmental Engineering Soborna str., 11, Rivne, Ukraine, 33028

PhD

Department of heat and gas supply, ventilation and sanitary equipment

Veronika Zhukova, National Technical University of Ukraine “Igor Sikorsky Kyiv polytechnic institute” Peremohy ave., 37, Kyiv, Ukraine, 03056

PhD

Department of Environmental Biotechnology and Bioenergy

Larisa Sabliy, National Technical University of Ukraine “Igor Sikorsky Kyiv polytechnic institute” Peremohy ave., 37, Kyiv, Ukraine, 03056

Doctor of Technical Sciences, Professor

Department of Environmental Biotechnology and Bioenergy

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Published

2018-03-27

How to Cite

Blyashyna, M., Zhukova, V., & Sabliy, L. (2018). Processes of biological wastewater treatment for nitrogen, phosphorus removal by immobilized microorganisms. Eastern-European Journal of Enterprise Technologies, 2(10 (92), 30–37. https://doi.org/10.15587/1729-4061.2018.127058

Issue

Vol. 2 No. 10 (92) (2018): Ecology

Section

Ecology

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Copyright (c) 2018 Maria Blyashyna, Veronika Zhukova, Larisa Sabliy

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