Study of the Oil-in-Water Emulsion Treatment by Nonwoven Polypropylene Fiber

Abstract

The feasibility of using nonwoven polypropylene fiber (NWPP) as the filter media to treat oil-in-water emulsion was studied. Both static adsorption experiments and dynamic filtration in coalescence bed were made. Due to the hydrophobic property of NWPP, the oil adsorption happened immediately when contacted with NWPP. The equilibrium was achieved after 50min adsorption. The Freundlich isotherm fits the experimental data well. The data was analyzed with three adsorption kinetic models: the pseudo first order, second order adsorption kinetics as well as the intra-particle diffusion models. The results showed that the second order adsorption kinetic was more accurate to correlate the experimental data. After the dynamic filtration processes using 4.0g NWPP, the oil removal efficiency could achieve 95%. It also found that the low flow rates would be better to treat oil-in-water emulsion in dynamic condition using NWPP as the filter media.

Removal of gas condensate from industrial wastewater using low‐cost adsorbents: Optimization by Box–Behnken design method

“…The maximum sorption efficiencies were obtained at pH of 7, contact time of 4 h, adsorbent dosage of 2 g/L, and initial hydrocarbon concentration of 25 mg/L. Moreover, Yao et al 24 investigated the removal of oil from wastewater using polypropylene fiber and could obtain a removal efficiency of 95%. The maximum removal efficiency was achieved at a flow rate of 60 L/h and contact time of 80 min.…”