Hutňan, M.; Jankovičová, B.; Zakhar, R.; Šoltýsová, N. Impact of Combined Electrolysis and Activated Sludge Process on Municipal Wastewater Treatment. Processes2024, 12, 868.
Hutňan, M.; Jankovičová, B.; Zakhar, R.; Šoltýsová, N. Impact of Combined Electrolysis and Activated Sludge Process on Municipal Wastewater Treatment. Processes 2024, 12, 868.
Hutňan, M.; Jankovičová, B.; Zakhar, R.; Šoltýsová, N. Impact of Combined Electrolysis and Activated Sludge Process on Municipal Wastewater Treatment. Processes2024, 12, 868.
Hutňan, M.; Jankovičová, B.; Zakhar, R.; Šoltýsová, N. Impact of Combined Electrolysis and Activated Sludge Process on Municipal Wastewater Treatment. Processes 2024, 12, 868.
Abstract
Electrochemical methods are used for the treatment of both municipal and industrial wastewater, either independently or in conjunction with biological methods. This conjunction is used for pretreatment or posttreatment of biologically treated wastewater. In our work, we focused on the combination of these processes, where pre-electrolysis was used to produce dissolved iron before the activation process. Electrolysis was also directly introduced into the activation using either iron or carbon electrodes. The surface of one iron electrode was 32.2 cm2, the applied voltage was 21 V, and the supplied current was 270 mA. The surface of one carbon electrode was 7.54 cm2, the supplied current was 82.5 mA, and the applied voltage was 21 V. From laboratory research on the treatment of synthetic municipal wastewater using a combination of electrolysis and activation processes, it resulted that the use of iron electrodes increased the efficiency of phosphorus removal compared to its precipitation with iron salts. The electrolysis had a positive effect on the sedimentation properties of sludge and the destruction of filamentous microorganisms. Electrolysis negatively affected the respiration rates of activated sludge and the efficiency of denitrification. However, it did not have a negative impact on the nitrification activity of the sludge.
Keywords
activated sludge process; denitrification; electrolysis; nitrification; sludge volume index (SVI)
Subject
Environmental and Earth Sciences, Water Science and Technology
Copyright:
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