Naslov
Application of Box–Behnken design for circulating flow sono-electrocoagulation for oily wastewater treatment

Autori
Posavcic, Hana ; Halkijevic, Ivan ; Vouk, Drazen ; Druskovic, Morana

Izvornik
Journal of Environmental Science and Health, Part A (1093-4529) 57 (2022), 8; 645-655

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Sono-electrocoagulation ; Box–Behnken design ; mineral oil ; flow rate ; iron electrodes

Sažetak
The increasing production of oily wastewater as a by-product of industry has become a major environmental problem. Therefore, this article investigates the removal of mineral oil from oily wastewater by a circulating flow sono- electrocoagulation. The Box–Behnken design was used to study the effects of characteristic electrocoagulation and ultrasonic parameters on mineral oil removal efficiency. A total of 34 different experimental setups were performed at a laboratory scale. A reduced cubic regression model with derived coefficients was developed to describe the mineral oil removal rate. The experimental results show that circulating flow sono-electrocoagulation with iron electrodes can effectively reduce mineral oil by 93.3% under the optimum conditions of 10.948 cycles, a current density of 107.12 A m−2 and a flow rate of 0.468 L s−1. The experimental observations agreed well with the modeled values, and the model was verified experimentally. Under the optimal conditions, the average operating cost was 0.77 EUR/m3.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo, Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti

POVEZANOST RADA