A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Experimental studies on the effects of coagulation and adsorption as a pretreatment process on the microfiltration of oily wastewater
To improve the performance of the membrane process in the treatment of oily wastewater, the combined effects of pretreatment, membrane modification, and optimization of operating parameters on the microfiltration membrane system were investigated. First, coagulation and adsorption were used as pretreatment steps. Polyaluminium chloride and ferric chloride were employed as coagulants, and granular activated carbon was used as an adsorbent. In the optimal coagulation condition (1 g/L polyaluminium chloride, pH 7.5), chemical oxygen demand (COD) was reduced by 96%, while in the optimal adsorption condition, in which large amounts of activated carbon were utilized, 48% of COD was eliminated. A membrane of polyethersulfone containing SiO2-g-polymethacrylic acid (PMAA) nanoparticles was then prepared by the non-solvent-induced phase separation method. To reduce fouling and increase the flux of the membrane, the SiO2 nanoparticles were first activated with amine groups and then PMAA was grafted onto the surface of the particles. Subsequently, the operating parameters were studied to optimize the performance of the polyethersulfone (PES)/SiO2-g-PMAA membrane using the response surface methodology (RSM) method. The results indicated that the flux of the modified membrane for pretreated wastewater was 72.2% higher than that of the PES membrane and non-pretreated wastewater at an optimum pressure of 2 bar and a flow rate of 3.5 L/min. HIGHLIGHTS A combination of conventional wastewater treatment and membrane-based process was studied.; A polyethersulfone membrane modified with SiO2-g-PMAA nanoparticles was prepared.; The effects of coagulation and adsorption as the pretreatment were investigated.; The response surface methodology model was used to determine the best-operating conditions (cross flow velocity (CFV), transmembrane pressure (TMP), and feed concentration).; The combined process showed high MF performance and chemical oxygen demand removal.;
Experimental studies on the effects of coagulation and adsorption as a pretreatment process on the microfiltration of oily wastewater
To improve the performance of the membrane process in the treatment of oily wastewater, the combined effects of pretreatment, membrane modification, and optimization of operating parameters on the microfiltration membrane system were investigated. First, coagulation and adsorption were used as pretreatment steps. Polyaluminium chloride and ferric chloride were employed as coagulants, and granular activated carbon was used as an adsorbent. In the optimal coagulation condition (1 g/L polyaluminium chloride, pH 7.5), chemical oxygen demand (COD) was reduced by 96%, while in the optimal adsorption condition, in which large amounts of activated carbon were utilized, 48% of COD was eliminated. A membrane of polyethersulfone containing SiO2-g-polymethacrylic acid (PMAA) nanoparticles was then prepared by the non-solvent-induced phase separation method. To reduce fouling and increase the flux of the membrane, the SiO2 nanoparticles were first activated with amine groups and then PMAA was grafted onto the surface of the particles. Subsequently, the operating parameters were studied to optimize the performance of the polyethersulfone (PES)/SiO2-g-PMAA membrane using the response surface methodology (RSM) method. The results indicated that the flux of the modified membrane for pretreated wastewater was 72.2% higher than that of the PES membrane and non-pretreated wastewater at an optimum pressure of 2 bar and a flow rate of 3.5 L/min. HIGHLIGHTS A combination of conventional wastewater treatment and membrane-based process was studied.; A polyethersulfone membrane modified with SiO2-g-PMAA nanoparticles was prepared.; The effects of coagulation and adsorption as the pretreatment were investigated.; The response surface methodology model was used to determine the best-operating conditions (cross flow velocity (CFV), transmembrane pressure (TMP), and feed concentration).; The combined process showed high MF performance and chemical oxygen demand removal.;
Experimental studies on the effects of coagulation and adsorption as a pretreatment process on the microfiltration of oily wastewater
Niloufar Lashkari Shafiei (author) / Farzin Zokaee Ashtiani (author) / Amir Fouladitajar (author)
2022
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Treatment of phosphate-containing oily wastewater by coagulation and microfiltration
| Online Contents | 2006
Study of microfiltration behaviour of oily wastewater
| Online Contents | 2007
Virus removal by ceramic membrane microfiltration with coagulation pretreatment
| British Library Conference Proceedings | 2003
Disinfection - Virus removal by ceramic membrane microfiltration with coagulation pretreatment
| Online Contents | 2003
Impacts of highly turbid water on microfiltration with coagulation pretreatment
| Springer Verlag | 2010