Abstract
Flotation technologies have emerged as key processes for the treatment of industrial
wastewater containing oil, grease and suspended solids. This review proposes an academic
synthesis of four studies addressing flotation-based separation, unified by their focus on the removal
of hydrophobic pollutants from complex industrial effluents. This paper cover: (i) the mechanistic
fundamentals and design parameters of flotation processes, (ii) the optimization of dissolved air
flotation (DAF) for dairy wastewater, (iii) a comparative assessment of acid-induced flotation and
DAF for vegetable oil refining effluents, and (iv) the integration of induced gas flotation (IGF)
assisted by micro/nanobubbles (MNBs) with ceramic membrane filtration (CMF) for oil sands
process-affected water. Overall, flotation processes are most effective when carefully tailored to the
physicochemical properties of the treated effluent and when integrated with complementary pre- or
post-treatment steps. Despite their high efficiency, limitations such as membrane fouling, energy
demand, and challenges related to large-scale implementation remain critical. This review
underscores the need for optimized hybrid systems and emphasizes the central role of
physicochemical interactions in improving flotation-based wastewater treatment performance.
wastewater containing oil, grease and suspended solids. This review proposes an academic
synthesis of four studies addressing flotation-based separation, unified by their focus on the removal
of hydrophobic pollutants from complex industrial effluents. This paper cover: (i) the mechanistic
fundamentals and design parameters of flotation processes, (ii) the optimization of dissolved air
flotation (DAF) for dairy wastewater, (iii) a comparative assessment of acid-induced flotation and
DAF for vegetable oil refining effluents, and (iv) the integration of induced gas flotation (IGF)
assisted by micro/nanobubbles (MNBs) with ceramic membrane filtration (CMF) for oil sands
process-affected water. Overall, flotation processes are most effective when carefully tailored to the
physicochemical properties of the treated effluent and when integrated with complementary pre- or
post-treatment steps. Despite their high efficiency, limitations such as membrane fouling, energy
demand, and challenges related to large-scale implementation remain critical. This review
underscores the need for optimized hybrid systems and emphasizes the central role of
physicochemical interactions in improving flotation-based wastewater treatment performance.
Cuvinte cheie
flotation
DAF
micro- and nanobubbles
industrial wastewater
oils and fats.
Istoric articol
Publicat
01.04.2026
Informații autori
Citare recomandată
Sorin IONESCU, Cristina POPESCU, Catalina CARAMIDARU, Ancuta VLAD, Cristina-Ileana COVALIU-MIERLĂ, Sorin Stefan BIRIu015e, Gigel PARASCHIV (2026). Flotation-Based Technologies for Industrial Wastewater Treatment. Journal of Fiability and Durability, 1(1), 372–379. https://doi.org/10.65631/JFD.1(37).2026.44
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