Oily wastewater treatment by adsorption–membrane filtration hybrid process using powdered activated carbon, natural zeolite powder and low cost ceramic membranes

Abstract

In this research, four types of low cost and high performance ceramic microfiltration (MF) membranes have been employed in an in-line adsorption-MF process for oily wastewater treatment. Mullite, mullite-alumina, mullite-alumina-zeolite and mullite-zeolite membranes were fabricated as ceramic MF membranes by low cost kaolin clay, natural zeolite and α-alumina powder. Powdered activated carbon (PAC) and natural zeolite powder in concentrations of 100-800 mg L were used as adsorbent agent in the in-line adsorption-MF process. Performance of the hybrid adsorption-MF process for each concentration of PAC and natural zeolite powder was investigated by comparing quantity of permeation flux (PF) and total organic carbon (TOC) rejection during oily wastewater treatment. Results showed that by application of 400 mg L PAC in the adsorption-MF process with mullite and mullite-alumina membranes, TOC rejection was enhanced up to 99.5% in comparison to the MF only process. An increasing trend was observed in PF by application of 100-800 mg L PAC. Also, results demonstrated that the adsorption-MF process with natural zeolite powder has higher performance in comparison to the MF process for all membranes except mullite-alumina membranes in terms of PF. In fact, significant enhancement of PF and TOC rejection up to 99.9% were achieved by employing natural zeolite powder in the in-line adsorption-MF hybrid process.

Elaboration and characterization of novel two-layer tubular ceramic membranes by coating natural zeolite and activated carbon on mullite-alumina-zeolite support: application for oily wastewater treatment

“…In this regard, kaolin clay powder was provided from Zenooz mine, Tabriz, Iran, with the chemical composition (wt. %) of SiO 2 (61.62), TiO 2 (0.4), Al 2 O 3 (24)(25), Fe 2 O (0.45-0.65), K 2 O (0.4), Na 2 O (0.5) and LO.I (9.5-10).…”

Applications of Emerging Nanomaterials for Oily Wastewater Treatment

“…Rasouli et al performed oily wastewater treatment by hybrid adsorption-MF process using powdered activated carbon (PAC), natural zeolite powder and ceramic membranes (Rasouli, Abbasi & Hashemifard 2017). In their study, PAC and natural zeolite powder by concentrations of 100-800 mg/L have been used as adsorbing agent in in-line adsorption-MF process and they reported the increase in total organic carbon rejection in all concentration of PAC for all membranes when compared to MF process alone.…”

Effective Adsorption of Diesel Oil by Crab-Shell-Derived Biochar Nanomaterials

“…Over recent years, large amounts of diesel oil hydrocarbon have entered the environment as a result of human industrial activities such as oil extraction, refining, storage, transportation, and production of the petrochemical industry [1,2]. The residue of oil pollutants in natural water has aroused the wide attention of researchers [3].…”