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Assessing the Feasibility of Recovering Water from Treated Municipal Wastewater

Dąbrowski Wojciech, Bagińska Sylwia, Malinowski Paweł

Journal of Ecological Engineering

2024

Vol. 25, nr 1

119--130

The problem of recovering water from treated wastewater may concern an increasing number of countries, especially those with low water resources. After costly treatment processes, water taken from surface and underground intakes is used and then largely discharged to receivers in the form of treated wastewater. Advanced wastewater treatment methods ensure that the treated wastewater is characterized by very low physical and chemical pollution, sometimes better than the water quality in the receiving basin. The research was conducted under a cooperation agreement between Bialystok University of Technology and Bialystok Waterworks Ltd. The recovery of water from wastewater was one of the topics pursued.This paper analyzes the parameters of treated wastewater from the largest municipal wastewater treatment plant in the Podlaskie Province. The analysis of the treated wastewater composition was based on monitoring studies conducted by the company Bialystok Waterworks Ltd. between 2020 and 2023. The analysis concerned the basic parameters of wastewater, namely the content of organic matter and total suspended solids.This was due to the requirements for the recyclability of treated wastewater. Linear modeling was performed to determine if a sufficiently strong correlation was detected;otherwise output distribution characteristics were provided.In all cases, the output concentrations were far below the class A limits for irrigation in the whole research period.

Ocena zawartości azotanów w mięsie drobiowym poddanym obróbce termicznej

Bagińska Sylwia, Kowczyk-Sadowy Małgorzata, Piekut Jolanta, Krasowska Małgorzata, Obidziński Sławomir, Woroniecka Gabriela

Przemysł Chemiczny

2022

T. 101, nr 3

197--200

W 10 próbkach mięsa drobiowego (świeżego, pieczonego, gotowanego lub liofilizowanego), pochodzących ze sklepów spożywczych oznaczono zawartość azotanów(III) i azotanów(V). Próbą referencyjną było mięso drobiowe z hodowli domowej. Najmniejszą zawartość azotanów(III) i azotanów(V) stwierdzono w mięsie pochodzącym z wiejskiej (własnej) hodowli drobiu. Suszenie sublimacyjne mięsa drobiowego powodowało utlenianie azotanów(III) do azotanów(V), a gotowanie i pieczenie redukcję azotanów(V) do azotanów(III). Ponadto w mięsie gotowanym stwierdzono istotnie mniejszą zawartość azotanów(III) niż w mięsie pieczonym. W próbkach mięsa gotowanego i pieczonego wykryto jedynie azotany(III), a w próbkach mięsa liofilizowanego wykryto tylko azotany(V).

Nitrate(III) and nitrate(V) were detd. by ion chromatog. in 10 samples of com. poultry meat (fresh, roasted, cooked or freeze-dried). The reference sample was poultry meat from rural (own) breeding. The lowest content of nitrates(III) and nitrates(V) was found in meat from rural (own) poultry farming. Freeze-drying of meat caused the oxidn. of nitrates(III) to nitrates(V), whereas cooking and baking caused the redn. of nitrates(V) to nitrates(III). Moreover, the content of nitrates(III) in the cooked meat was significantly lower than in the roasted meat. Only nitrates(III) were detected in the cooked and roasted meat samples, and only nitrates(V) in the freeze-dried meat samples.