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2 Journal of Ecological Engineering

2 2021

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The Interdependence of Organic and Biogenic Pollutants Concentrations in the Aspect of their Susceptibility to Biodegradation – A Case Study

Bugajski Piotr Michał, Pawełek Jan, Jóźwiakowska Karolina

Journal of Ecological Engineering

2021

Vol. 22, nr 4

138--147

The aim of the research was to determine, the interdependence between COD and such parameters as: BOD5, TN and TP in raw wastewater and in mechanically treated wastewater using statistical methods, which would allow estimating the values of these parameters based on COD. Moreover, the aim of the study was to determine the susceptibility of wastewater before and after mechanical treatment to decomposition of organic and biogenic pollutants. The research was conducted from 2006 to 2015 in a collective wastewater treatment plant in Nowy Sącz. During the research period, 120 samples of raw and mechanically treated wastewater were collected and analyzed once a month. In the analytical part of the research, the quality of sewage was characterized, the strength of correlation of the examined indicators was determined and the susceptibility of sewage to biological decomposition was assessed. On the basis of the analysis it was found that knowing the value of the COD parameter it is possible to determine the values of the other indicators, i.e. BOD5, TN and TP. Moreover, it was shown that wastewater is largely susceptible to the biological decomposition of pollutants, and during the period when the inflow of sewage with reduced susceptibility occurs, the wastewater with high content of organic carbon should be dosed.

Concept of a New Technological System of a Biological Reactor in a Wastewater Treatment Plant in Nowy Targ in Terms of the Current Quantity and Quality of Wastewater – Case Study

Nowobilska-Majewska Elwira, Bugajski Piotr Michał

Journal of Ecological Engineering

2021

Vol. 22, nr 5

39--46

The objective of the work was to design a biological reactor in the Bardenpho system as an alternative to the SBR biological reactor in the wastewater treatment plant in Nowy Targ. The technological system of the newly designed biological reactor was adapted to the existing reinforced concrete structure. The design of individual nitrification, denitrification, predenitrification and dephosphatation chambers was developed on the basis of actual data on the volume of influent sewage and its pollutant loads. The newly designed technological system of the Bardenpho type biological reactor guarantees high efficiency in the elimination of organic and biogenic compounds from wastewater. Within operational guidelines, it is proposed to gradually eliminate the inflow of foreign waters to the sewage system by removing the illegally connected roof gutters. Moreover, it is recommended to strictly control the volume of the fur-plant industrial sewage discharged into the sewage system.