Investigation of in-line coagulation-MF hybrid process for oily wastewater treatment by using novel ceramic membranes

Optimisation of the removal of oil in water emulsion by using ceramic microfiltration membrane and hybrid coagulation/sand filter-MF

“…The effect of ferrous sulfate doses on the oil removal efficiencies when added to emulsion during the Hybrid Coagulation-MF process are shown in Figure 10 (b). The results by the ferrous sulfate increased up to 100 mg/L and the oil concentration in the emulsion was 1000 ppm, the oil removal efficiency increased from 91.5% when applying the MF process alone, to 98.9% when applying the Hybrid Coagulation/sand filter-MF, due to the positive Fe +2 ions associating with the negative charge of the oil droplets [42,43] leading to better capture of the resulting large flocs by the sand filter.…”

“…The optimal performance of ferrous sulfate is slightly higher than for aluminium sulfate, but with a larger coagulant dose needed to achieve it. It can be explained that these cations can cause an increase in the size of the oil particles [36,43] . Thus, the flux will increase due to the increase in the size of the oil particles, subsequently, the cake layer is more open.…”

“…Therefore, the optimum permeate flux is achieved when using hybrid coagulation/sand filter -MF process because that process lead to a reduction of membrane fouling [43,48,49]. Due to the coagulation process and sand filter reducing the oil in the inlet emulsion to the ceramic membrane.…”

Optimization of Cyan flexo dye removal by nano zero-valent ironusing response surface methodology

“…However, it is necessary to find alternative, eco-friendly and economically viable methods which are effective in dye removal process from large volumes of effluents (El Haddad et al, 2012;Asfaram et al, 2015;Elhalil et al, 2016;de Sales et al, 2013;Saad et al, 2017;Rasouli et al, 2017).…”

Fabrication, characterization, fouling behavior and performance study of ceramic microfiltration membranes for oily wastewater treatment

“…Oily wastewater is discharged by petrochemical and refinery plants, transportation vehicles, machinery and various other types of industrial plants, fueled by the global increase in the world population and rising demand for fossil fuels such as gasoline. Releasing this type of wastewater into the environment without treatment can contaminate soil and water and cause serious environmental problems for humans, plants and animal species [1,2]. Many methods of oily wastewater treatment have been developed by researchers in response, including flotation, coagulation, adsorption, sedimentation and membrane processes [3][4][5].…”