A new combination of microfiltration, powdered activated carbon and coagulation for treatment of oily wastewater

Rasouli, Yaser; Abbasi, Mohsen; Hashemifard, S.A.

doi:10.1007/s13762-018-1906-5

Cited by 17 publications

(6 citation statements)

References 43 publications

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“…Schematics of these fouling models are shown in Figure 1. Detailed descriptions of the four models have been published previously [23].…”

Section: Modelingmentioning

confidence: 99%

“…The optimum operating conditions determined there (TMP = 3 bar, CFV = 1.5 m s −1 and T = 35°C) were used in this study. For other technical descriptions of experimental setups, refer to Rasouli et al [1,23]. The PF and pure water permeation flux are the volume (V) of the accumulated permeate flow in units of time (t) and the surface (A) of the membrane given by Equation 11:…”

Section: Experimental Setup and Operationmentioning

confidence: 99%

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

Rasouli

Abbasi

Hashemifard

2019

Journal of Asian Ceramic Societies

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Four types of low-cost, high-performance ceramic microfiltration membranes have been fabricated and characterized using different analytic approaches for oily wastewater treatment. Mullite, mullite-alumina (MA) with 10-50 wt% alumina, mullite-alumina-zeolite (MAZ) with 10-40 wt% zeolite/alumina and mullite-zeolite (MZ) with 10-50 wt% zeolite content have been made using local clays. Factors such as their pure water permeation flux, oil rejection performance and permeation flux (PF) have been compared. Experimental results showed that MA 50% membranes have the highest steady-state PF of 549 Lm −2 h −1 among all the membranes at operating conditions with a cross-flow of velocity (CFV) = 1.5 m s −1 , transmembrane pressure (TMP) = 3 bar and temperature (T) = 35 ○ C. The lowest and highest oil rejection results for the membranes were 95.89% and 98.77% for MZ 10% and MZ 50% membranes, respectively. Also, Hermia's models accurately predict experimental data showing a PF decline over time during treatment.

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“…Schematics of these fouling models are shown in Figure 1. Detailed descriptions of the four models have been published previously [23].…”

Section: Modelingmentioning

confidence: 99%

Section: Experimental Setup and Operationmentioning

confidence: 99%

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

Rasouli

Abbasi

Hashemifard

2019

Journal of Asian Ceramic Societies

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“…Most of the microfiltration membranes are made from polymeric materials, but inorganic materials are also widely used. Ceramic membranes have become the favored option because of their extremely high chemical, mechanical and thermal stability, ease of cleaning and sterilization stability, their outstanding separation characteristics, and their long working life …”

Section: Introductionmentioning

confidence: 99%

“…Ceramic membranes have become the favored option because of their extremely high chemical, mechanical and thermal stability, ease of cleaning and sterilization stability, their outstanding separation characteristics, and their long working life. 12,13 During the cross-flow microfiltration of cultivation broths of different microorganisms, membrane fouling emerges as the major issue. 14,15 The main cause of microfiltration membrane fouling is deposition of cells, different organic substances present in cultivation broth, either as cultivation medium remains or as produced metabolites, on the membrane surface.…”

Section: Introductionmentioning

confidence: 99%

Improving energy efficiency of Bacillus velezensis broth microfiltration in tubular ceramic membrane by air sparging and turbulence promoter

Jokić

Pajčin

Grahovac

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND Popularity of biocontrol has increased due to the growing environmental concerns and the demand for organic products. It is considered as a sustainable practice for efficient agricultural production. Microbial biopesticides offer environment‐friendly biotechnological alternative to chemical control of plant diseases and pests. Due to its advantages in cell separation cross‐flow microfiltration has emerged as a powerful alternative to the conventional separation methods. However, the flux enhancement remains to be addressed. This study has estimated the use of flux improvement techniques for biomass harvesting by microfiltration using tubular ceramic membranes. Investigated methods for flux enhancement were turbulence promoter, i.e. Kenics static mixer, two‐phase flow (air sparging) and the combination of these two methods. RESULTS Significant flux improvement coincides with a reduction in specific energy consumption, while at the same time Bacillus velezensis cells have retained viability and antibacterial activity. The highest values of flux and corresponding improvement, compared to the microfiltration without enhancement techniques, are obtained in the case of combining Kenics static mixer and two‐phase flow (133.4 L m−2 h−1 and 502%). Flux improvement for air sparging was 134%, for turbulence promoter alone flux increase was 434%. CONCLUSION The methods proposed herein have achieved effective flux enhancement for cell harvesting. The obtained results also suggest encouraging basis to promote large‐scale economical production of biomass for biocontrol application. © 2019 Society of Chemical Industry

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“…Besides, ZIF‐8 has excellent chemical stability, high porosity and specific surface area and has been extensively applied in adsorption and separation, such as for the removal of oil droplets or organic solvents from water . Carbon black (CB) has notable adsorption ability, and it has been reported that activated carbon can be used in the treatment of oily wastewater . C600 is an amorphous form of carbon with high specific surface area.…”

Section: Introductionmentioning

confidence: 99%

Hybrid electrospun porous fibers of poly(lactic acid) and nano ZIF‐8@C600 as effective degradable oil sorbents

Wang

Dai

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND: With the rapid industrial and urbanization development, a large amount of oily wastewater is generated from various sources. It is mutagenic and carcinogenic to human health and seriously affects the ecosystem. In this study PLA/ZIF-8@C600 nanofibers were prepared for oil adsorption. RESULTS: Hybrid nanoparticles (ZIF-8@C600) of carbon black C600 and zeolitic imidazolate framework-8 (ZIF-8) with high specific surface area and porous structure were prepared by co-deposition and characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FITR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy and contact angle measurement. Biodegradable composite nanofiber membranes of poly(lactic acid) (PLA) and ZIF-8@C600 were manufactured by electrospinning. The SEM and contact angle results showed that the addition of ZIF-8@C600 could adjust the diameter, porosity, pore size and hydrophobicity of the composite electrospun nanofibers. The PLA/ZIF-8@C600 porous membranes had good oil sorption properties in oil-water mixture and emulsion. The oil adsorption capacity of the sample with 1 wt% ZIF-8@C600 was improved by ∼72.59% compared with that of pure PLA (13.5 g g −1 ), which demonstrated that the PLA/ZIF-8@C600 fibers were good candidates as oil sorbents. The adsorption kinetics of the membranes on paraffin liquid was in accordance with pseudo-second-order kinetics.CONCLUSION: The addition of hybrid ZIF-8@C600 improved the hydrophobic properties and oil adsorption capacity of PLA/ZIF-8@C600 porous membranes. Because PLA is an environmentally friendly polymer, composite membranes based on it can avoid secondary pollution. Overall, these findings have good prospects for future treatment of oily wastewater. Adsorption capacity of PLA/ZIF-8@C600 fibers for oilsAll samples were cut into (2.5 cm × 2.5 cm) pieces; the thickness of the fibers was 0.15 ± 0.05 mm (measured by a digital display micrometer). Paraffin liquid (0.5 mL, dyed with Sudan III) was poured into deionized water (2.5 mL, dyed with MB) to form an artificial oil-water bath. The cut PZC-0, PZC-1, PZC-2 and PZC-3 were placed on the oil layer for 3 min each. Photographs were taken before and after oil adsorption.The adsorption capacity (q) for paraffin liquid was investigated at room temperature. Two pieces (2.5 cm × 2.5 cm) of each sample were immersed in 25 mL of paraffin liquid for 3 min. Then the J Chem Technol Biotechnol 2020; 95: 730-738

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A new combination of microfiltration, powdered activated carbon and coagulation for treatment of oily wastewater

Cited by 17 publications

References 43 publications

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

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

Improving energy efficiency of Bacillus velezensis broth microfiltration in tubular ceramic membrane by air sparging and turbulence promoter

Hybrid electrospun porous fibers of poly(lactic acid) and nano ZIF‐8@C600 as effective degradable oil sorbents

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