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1

Evaluation of the middle course of the Oder River contamination

Wolska Małgorzata, Urbańska-Kozłowska Halina

Instal

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2023

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nr 12

129--133

EN

Studies of water quality changes in the Oder River in its middle course near the city of Wroclaw, mainly concerning the content of organic substances, were conducted between the years 2017-2022. Over the period of five years, no significant worsening of the Oder River water quality has been observed with respect to the total organic carbon content, however, an increase in the concentrations of specific organic contaminants from the PFAS group was observed. An intense seasonal algae growth was found in spring and late summer, and the number of algae has increased with time. Diatoms are the most abundant algae type. Water from the Oder River contains large amounts of biogens (nitrates and phosphates), which promote microorganism growth in water.

PL

Badania zmian jakości wody Odry prowadzone były w środkowym jej biegu koło Wrocławia w latach 2017-2022. W okresie badań nie stwierdzono istotnych zmian zawartości substancji organicznych zarówno w zakresie ogólnego węgla organicznego, jak też analizowanych mikrozanieczyszczeń. W Odrze stwierdzono zakwit glonów w okresie wiosennym i późnego lata, a liczebność mikroorganizmów rosła w kolejnych latach, wśród których dominowały Okrzemki. Stwierdzona duża zawartość substancji biogennych w wodzie mogła przyczyniać się do rozwoju mikroorganizmów, w tym glonów.

2

Ocena skuteczności oczyszczania wody w aspekcie usuwania związków żelaza i manganu

Wolska Małgorzata, Kabsch-Korbutowicz Małgorzata, Wiśniewski Jacek

Gaz, Woda i Technika Sanitarna

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2023

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Nr 2

17--20

PL

Wody podziemne, stanowiące główne źródło zaopatrzenia ludności w wodę do picia, ze względu na swój skład wymagają często uzdatniania z wykorzystaniem procesów napowietrzania i filtracji. O skuteczności przebiegu tych procesów decyduje wiele parametrów eksploatacyjnych poszczególnych procesów jednostkowych, które powinny być kontrolowane, a w wypadku pogorszenia jakości uzdatnionej wody odpowiednio weryfikowane. W artykule, na podstawie przeprowadzonych badan, pokazano ze oceny przebiegu usuwania związków żelaza i manganu podczas uzdatniania wód podziemnych można dokonać na podstawie badań w skali wielkolaboratoryjnej oraz technicznej.

EN

Groundwater, the main source of the drinking water supply, due to its composition, often requires treatment using aeration and filtration processes. The effectiveness of the process is determined by a number of operational parameters of individual unit processes, which should be controlled and, in the case of the treated water quality deterioration, properly verified. In the article, based on the performed studies, it is shown that the evaluation of iron and manganese compounds removal during groundwater treatment can be carried out on the basis of large-laboratory and technical scale studies.

3

Assessment of the ozonation impact on adsorption efficiency in surface water treatment

Adamski Wojciech, Wiśniewski Jacek, Wolska Małgorzata

Environment Protection Engineering

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2023

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Vol. 49, nr 3

95--107

EN

Organic substances in water, both of natural and synthetic origin, especially their share in water treatment by-products can pose a threat to drinkers. That is why adsorption, as a very effective process of dissolved organic compounds removal is commonly used in surface water treatment systems. For process design and optimization, mathematical models both mechanistic and statistics are created. The results of the investigation of granular activated carbon (GAC) bed adsorption in a pilot plant with a capacity of 3 m3/h have been presented. Two systems have been tested – without ozonation and with ozonation before GAC adsorption. The models of the kinetics of GAC adsorption capacity exhaustion, the model of minimal GAC bed depth (adsorption zone) for assumed process efficiency (C/CO), as well as the model of adsorption zone movement velocity to the bottom of GAC bed, have been created. For the state of adsorptive equilibrium, the first model enables the determination of the isotherm parameters of the Freundlich type, the two other models are used for the calculation of GAC bed run time for the certain bed depth and assumed efficiency. It has been shown that in this case (water pollution, GAC type, pretreatment) ozonation plays a minor role.

4

Evaluation of the possibility of replacing the rapid filtration process with ultrafiltration in surface water treatment systems

Wolska Małgorzata, Wisniewski Jacek A., Ferenc Zbigniew, Adamski Wojciech, Mołczan Marek, Pawłowska Magdalena, Szerzyna Slawomir

Environment Protection Engineering

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2021

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Vol. 47, nr 2

83--92

EN

The presented study aimed to compare the effectiveness of ultrafiltration and filtration through a sand bed during the water treatment process after the coagulation and sedimentation. The study was conducted in two flow-type water treatment systems: the reference and the test system. Both systems functioned continuously with a throughput of 1 m3/h. The research has shown that both processes ensured a very effective removal of post-coagulation suspensions, however, ultrafiltration was more effective. The filtration process allowed a slightly higher removal of organic substances as compared to ultrafiltration. The effectiveness of the removal of organic substances was determined by the biological activity of sand beds, which is not allowed in the ultrafiltration process. Besides, during the filtration process, aluminum remaining after coagulation was more effectively removed. In turn, the ultrafiltration process ensured an almost 100% effectiveness in reducing the total microorganism cell count, while the effectiveness of the filtration process was approximately half of that. In the end, the possibility of replacing the filtration process with the ultrafiltration process is determined by the costs of both processes.