Influence of Different Proportions of the Addition of Electrocoagulated Metal Sludge (EMS) Obtained from Oily Wastewater Treatment on the Properties of Laboratory Bricks

Morana Drušković (), Dražen Vouk, Dajana Kučić Grgić and Mario Šiljeg
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Morana Drušković: DOK-ING Ltd., Slavonska avenija 22 G, 10000 Zagreb, Croatia
Dražen Vouk: Water Research Department, Faculty of Civil Engineering, University of Zagreb, Fra Andrije Kacica-Miosica 26, 10000 Zagreb, Croatia
Dajana Kučić Grgić: Department of Industrial Ecology, Faculty of Chemical Engineering and Technology, University of Zagreb, Trg Marka Marulića 19, 10000 Zagreb, Croatia
Mario Šiljeg: Josip Juraj Strossmayer Water Institute, Ulica Grada Vukovara 220, 10000 Zagreb, Croatia

Sustainability, 2024, vol. 16, issue 10, 1-21

Abstract: Electrochemical wastewater treatment technologies are increasingly being used in practice, and the combination of electrocoagulation with advanced oxidation processes has been shown to increase treatment efficiency. The treatment of oily wastewater produces electrocoagulated metal sludge (EMS). In this work, the possibility of using different ratios of EMS produced during oily wastewater treatment was investigated. EMS was dried conventionally in an oven at 105 °C and used as a partial substitute for clay in the manufacture of laboratory bricks. The main research objectives of this study were to examine the possibility and justification of introducing EMS in brick production. The results show that an increase in the proportion of EMS in the manufacturing of bricks leads to a deterioration in the quality of the bricks. Bricks with an addition of 1 wt% and 5 wt% EMS showed the best properties. The loss on ignition (LOI), compressive strength, boiling water absorption and initial water absorption were determined at 5.7%; 49 N/mm 2 , 16%, 14 g/min/200 cm 2 , 15% for modified bricks with 1 wt% EMS and 6.3%, 48 N/mm 2 , 20%, 15 g/min/200 cm 2 for modified brick with 5 wt%.

Keywords: oily wastewater; EMS; bricks; compressive strength; water adsorption; LOI; ecotoxicity (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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