Effect of the coupled action of ultrasonic waves and advanced oxidation reaction on the properties of bottom sediments originating from trout culture |
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| Authors: | Joanna Sikora Wojciech Janczukowicz Joanna Rodziewicz Izabella Kłodowska Artur Mielcarek |
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| Affiliation: | Faculty of Environmental Sciences, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland |
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| Abstract: | The objective of this study was to determine the effect of preliminary ultrasound treatment of bottom sediments, a factor enhancing the reaction of advanced oxidation, on changes in the properties of sediments originating from the intensive aquaculture of rainbow trout. Experiments were conducted on a laboratory scale in model reactors with an active volume of 1.0 L, either under conditions of exposure to the ultrasonic field alone or under conditions of exposure to both the ultrasonic field and a chemical reagent: Fe3+/H2O2. The results we achieved showed that preliminary ultrasound treatment of bottom sediments increased the advanced oxidation reaction yield and consequently improved the physicochemical properties of the sediments. The highest yield was obtained upon 15‐min ultrasound treatment at a Fenton reagent dosage of 1.5 g Fe3+ L?1 and g H2O2 L?1. These conditions enabled a 43% reduction in the concentrations of organic compounds in the filtrate, shortened the capillary suction time (CST) by 93%, decreased the concentration of volatile substances in the sediments by 13% and decreased the levels of total nitrogen in sediments by 9% and of total phosphorus in the filtrate by 21%, and additionally caused a decrease in the mineral and dry matter content in the sediments. |
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| Keywords: | trout aquaculture bottom sediments ultrasounds Fenton reagents |
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