Change search
Link to record
Permanent link

Direct link
BETA
Publications (7 of 7) Show all publications
Osadolor, O. A. (2018). Effect of media rheology and bioreactor hydrodynamics on filamentous fungi fermentation of lignocellulosic and starch-based substrates under pseudoplastic flow conditions. Bioresource Technology, 263, 250-257
Open this publication in new window or tab >>Effect of media rheology and bioreactor hydrodynamics on filamentous fungi fermentation of lignocellulosic and starch-based substrates under pseudoplastic flow conditions
Show others...
2018 (English)In: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 263, p. 250-257Article in journal (Refereed) Published
Abstract [en]

The aim of this work was to study how media rheology and bioreactor hydrodynamics would influence fermentation of lignocellulosic and starch-based substrates under pseudoplastic flow conditions. This was investigated using hydrolyzed wheat straw, wheat-based thin stillage and filamentous fungi as inoculum in bubble column, airlift and horizontal hybrid tubular/bubble column (textile bioreactor) bioreactors. The rheological models showed that the consistency index was dependent on biomass growth (R2 0.99) while the flow behavior index depended on biomass growth and suspended solid (R2 0.99). Oxygen transfer rate above 0.356 mmol-O2/L/h was needed for growing fungi with a cube-root growth rate constant of 0.03 g1/3/L1/3/h. At 1.4 VVM aeration the textile bioreactor performed better than others with minimal foaming, yields of 0.22 ± 0.01 g/g and 0.47 ± 0.01 g/g for ethanol and biomass, substrate consumption rate of 0.38 g/L/h. Operating the bioreactors with air-flowrate to cross-sectional area ratio of 8.75 × 10−3 (m3/s/m2) or more led to sustained foaming.

Keywords
Foaming Oxygen transfer rate, Rheology model, Fungi growth kinetics, Bioreactor hydrodynamics
National Category
Chemical Process Engineering
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-14345 (URN)10.1016/j.biortech.2018.04.093 (DOI)000439317100030 ()2-s2.0-85046700875 (Scopus ID)
Available from: 2018-06-21 Created: 2018-06-21 Last updated: 2018-11-29Bibliographically approved
Jabbari, M., Skrifvars, M., Åkesson, D. & Taherzadeh, M. J. (2018). New Solvent for Polyamide 66 and Its Use for Preparing a Single-Polymer Composite-Coated Fabric. International Journal of Polymer Science
Open this publication in new window or tab >>New Solvent for Polyamide 66 and Its Use for Preparing a Single-Polymer Composite-Coated Fabric
2018 (English)In: International Journal of Polymer Science, ISSN 1687-9422, E-ISSN 1687-9430Article in journal (Refereed) Published
Abstract [en]

Polyamides (PAs) are one of the most important engineering polymers; however, the difficulty in dissolving them hinders their applications. Formic acid (FA) is the most common solvent for PAs, but it has industrial limitations. In this contribution, we proposed a new solvent system for PAs by replacing a portion of the FA with urea and calcium chloride (FAUCa). Urea imparts the hydrogen bonding and calcium ion from the calcium chloride, as a Lewis acid was added to the system to compensate for the pH decrease due to the addition of urea. The results showed that the proposed solvent (FAUCa) could readily dissolve PAs, resulting in a less decrease in the mechanical properties during the dissolution. The composite prepared using the FAUCa has almost the same properties as the one prepared using the FA solution. The solution was applied on a polyamide 66 fabric to make an all-polyamide composite-coated fabric, which then was characterized. The FAUCa solution had a higher viscosity than the one prepared using the neat FA solvent, which can be an advantage in the applications which need higher viscosity like preparing the all-polyamide composite-coated fabric. A more viscous solution makes a denser coating which will increase the water /gas tightness. In conclusion, using the FAUCa solvent has two merits: (1) replacement of 40% of the FA with less harmful and environmentally friendly chemicals and (2) enabling for the preparation of more viscous solutions, which makes a denser coating.

National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-21557 (URN)10.1155/2018/6235165 (DOI)000448619700001 ()2-s2.0-85062636745 (Scopus ID)
Available from: 2019-08-06 Created: 2019-08-06 Last updated: 2019-08-07
Jabbari, M., Osadolor, O. A., Nair, R. B. & Taherzadeh, M. J. (2017). All-polyamide composite coated-fabric as an alternative material of construction for textile-bioreactors (TBRs). Energies, 10(11)
Open this publication in new window or tab >>All-polyamide composite coated-fabric as an alternative material of construction for textile-bioreactors (TBRs)
2017 (English)In: Energies, ISSN 1996-1073, E-ISSN 1996-1073, Vol. 10, no 11Article in journal (Refereed) Published
Abstract [en]

All-polyamide composite coated-fabric (APCCF) was used as an alternative material for the construction of textile-bioreactors (TBRs), which are prepared as a replacement of the traditional stainless steel bioreactors (SSBRs) or concrete-based bioreactors. The material characteristics, as well as the fermentation process performance of the APCCF-TBR, was compared with a TBR made using the polyvinyl chloride (PVC)-coated polyester fabric (PVCCF). The TBRs were used for the anaerobic fermentation process using baker's yeast; and, for aerobic fermentation process using filamentous fungi, primarily by using waste streams from ethanol industries as the substrates. The results from the fermentation experiments were similar with those that were obtained from the cultivations that were carried out in conventional bioreactors. The techno-economic analysis conducted using a 5000 m3 APCCF-TBR for a typical fermentation facility would lead to a reduction of the annual production cost of the plant by 128,000,000 when compared to similar processes in SSBR. The comparative analyses (including mechanical and morphological studies, density measurements, thermal stability, ageing, and techno-economic analyses) revealed that the APCCF is a better candidate for the material of construction of the TBR. As the APCCF is a 100% recyclable single-polymer composite, which was prepared from Nylon 66 textile production-line waste, it could be considered as an environmentally sustainable product. 

Place, publisher, year, edition, pages
MDPI AG, 2017
Keywords
All-polyamide coated-fabric, Edible filamentous fungi cultivation, Nylon 66, Polyvinyl chloride (PVC) coated-textile, Single-polymer composite, Techno-economic analysis, Textile bioreactor, Waste management, Yeast fermentation
National Category
Industrial Biotechnology
Identifiers
urn:nbn:se:hb:diva-14814 (URN)10.3390/en10111928 (DOI)000417046500247 ()2-s2.0-85035113895 (Scopus ID)19961073 (ISSN) (ISBN)
Available from: 2018-08-02 Created: 2018-08-02 Last updated: 2018-12-01
Hatamvand, M., Mirjalili, S. A., Sharzehee, M., Behjat, A., Jabbari, M. & Skrifvars, M. (2017). Fabrication parameters of low-temperature ZnO-based hole-transport-free perovskite solar cells. Optik (Stuttgart), 40, 443-450
Open this publication in new window or tab >>Fabrication parameters of low-temperature ZnO-based hole-transport-free perovskite solar cells
Show others...
2017 (English)In: Optik (Stuttgart), ISSN 0030-4026, E-ISSN 1618-1336, Vol. 40, p. 443-450Article in journal (Refereed) Published
Abstract [en]

Perovskite solar cells (PSCs) are a new generation solar cells. Low-Temperature techniques are used for fabrication PSCs on a flexible substrate that has a low thermal tolerance. In this paper, low-temperature PSCs with ZnO nanoparticles were prepared as electron transport material (ETM) without hole transport material (HTM). Effects of some of the fabrication parameters of low-temperature ZnO based PSCs without HTM, on their principal characteristics and performance, were investigated. Parameters such as the concentration of ZnO nanoparticles (NPs) dispersion, spin coating speed of ZnO NPs, and concentration of CH3NH3I on characteristics and performance of fabricated low-temperature PSCs were studied. The study shows that by changing these parameters, the performance of the fabricated PSCs changes considerably.

Keywords
Flexible solar cell, Low-temperature solar cells, Perovskite solar cells, ZnO nanoparticles, ZnO-based perovskite solar cells
National Category
Materials Chemistry
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-13452 (URN)10.1016/j.ijleo.2017.02.101 (DOI)000404313800055 ()2-s2.0-85018307969 (Scopus ID)
Available from: 2018-01-14 Created: 2018-01-14 Last updated: 2018-01-15Bibliographically approved
Bátori, V., Jabbari, M., Åkesson, D., Lennartsson, P. R., Taherzadeh, M. J. & Zamani, A. (2017). Production of Pectin-Cellulose Biofilms: A New Approach for Citrus Waste Recycling. International Journal of Polymer Science, 2017, 1-9, Article ID 9732329.
Open this publication in new window or tab >>Production of Pectin-Cellulose Biofilms: A New Approach for Citrus Waste Recycling
Show others...
2017 (English)In: International Journal of Polymer Science, ISSN 1687-9422, E-ISSN 1687-9430, Vol. 2017, p. 1-9, article id 9732329Article in journal (Refereed) Published
Abstract [en]

While citrus waste is abundantly generated, the disposal methods used today remain unsatisfactory: they can be deleterious for ruminants, can cause soil salinity, or are not economically feasible; yet citrus waste consists of various valuable polymers. This paper introduces a novel environmentally safe approach that utilizes citrus waste polymers as a biobased and biodegradable film, for example, for food packaging. Orange waste has been investigated for biofilm production, using the gelling ability of pectin and the strength of cellulosic fibres. A casting method was used to form a film from the previously washed, dried, and milled orange waste. Two film-drying methods, a laboratory oven and an incubator shaker, were compared. FE-SEM images confirmed a smoother film morphology when the incubator shaker was used for drying. The tensile strength of the films was 31.67 ± 4.21 and 34.76 ± 2.64 MPa, respectively, for the oven-dried and incubator-dried films, which is within the range of different commodity plastics. Additionally, biodegradability of the films was confirmed under anaerobic conditions. Films showed an opaque appearance with yellowish colour.

National Category
Engineering and Technology
Identifiers
urn:nbn:se:hb:diva-12981 (URN)10.1155/2017/9732329 (DOI)000414729600001 ()2-s2.0-85042320662 (Scopus ID)
Available from: 2017-11-09 Created: 2017-11-09 Last updated: 2019-08-07Bibliographically approved
Jabbari, M., Skrifvars, M., Åkesson, D. & Taherzadeh, M. J. (2016). Introducing all-polyamide composite coated fabrics: A method to produce fully recyclable single-polymer composite coated fabrics. Journal of Applied Polymer Science, 133(7)
Open this publication in new window or tab >>Introducing all-polyamide composite coated fabrics: A method to produce fully recyclable single-polymer composite coated fabrics
2016 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 133, no 7Article in journal (Refereed) Published
Abstract [en]

Novel all-polyamide composite (APC) has been developed to replace traditional coated fabrics with good interfacial adhesionand enhanced recyclability. The composite is fully recyclable since it contains no other materials except polyamide. APC was preparedby partially dissolving a polyamide fabric by treatment with a film-forming polyamide solution. The effect of the polyamidesolution concentration and gelling time on tensile and viscoelastic properties of APCs was investigated to explore the optimum processingparameters for balancing the good interfacial adhesion. The composite properties were studied by dynamic mechanical thermalanalysis (DMTA), tensile testing and scanning electron microscopy (SEM). The results showed a good adhesion between the coatingand the fabric. A new method was introduced to convert a low value added textile waste to a high value-added product. The compositeis tunable, in terms of having a dense or a porous top-layer depending on the end-use requirements.

Keywords
coatings, films, polyamides, recycling, textiles, coated fabrics, single-polymer composites
National Category
Chemical Engineering
Identifiers
urn:nbn:se:hb:diva-3739 (URN)10.1002/app.42829 (DOI)000367845800001 ()2-s2.0-84948577513 (Scopus ID)
Available from: 2015-12-06 Created: 2015-12-06 Last updated: 2017-12-01Bibliographically approved
Jabbari, M., Åkesson, D., Skrifvars, M. & Taherzadeh, M. J. (2015). Novel lightweight and highly thermally insulative silica aerogel-doped poly (vinyl chloride)-coated fabric composite. Journal of reinforced plastics and composites (Print), 34(19), 1581-1592
Open this publication in new window or tab >>Novel lightweight and highly thermally insulative silica aerogel-doped poly (vinyl chloride)-coated fabric composite
2015 (English)In: Journal of reinforced plastics and composites (Print), ISSN 0731-6844, E-ISSN 1530-7964, Vol. 34, no 19, p. 1581-1592Article in journal (Refereed) Published
Abstract [en]

Novel lightweight and highly thermal insulative aerogel-doped poly(vinyl chloride)-coated fabric composites wereprepared on woven fabrics made of polyester fibres using knife coating method, and their performances were comparedwith neat composite. The composites were prepared by incorporating a commercial aerogel to a ‘green’ poly(vinylchloride) (PVC) plastisol. The effect of aerogel-content, thermal insulating property, thermal degradation, surface characteristics,tensile and physical properties of the composites were investigated. Results revealed that aerogel couldreduce thermal conductivity, density and hydrophilicity of the composites dramatically without significant decrease inother properties. Experimental results showed that thermal insulation properties were enhanced by 26% (from 205 to152 mW/m-K), density decreased by 17% (from 1.132 to 0.941 g/cm3) and hydrophobicity increased by 16.4% (from76.02 to 88.671.48) with respect to the unmodified coated fabric. Analyses proved that composite with 3% aerogel isthe lightest by weight, while 4% showed the highest thermal insulation. The results showed that 4% is the criticalpercentage, and preparation of composites with aerogel content higher than 4% has limitations with the given formulationdue to high viscosity of plastisol. The prepared composite has potential applications in many fields such asdevelopment of textile bioreactors for ethanol/biogas production from waste materials, temporary houses and tents,facade coverings, container linings and tarpaulins. The prepared composite can be considered ‘green’ due to usage of anon-phthalate environment-friendly plasticiser.

Keywords
Poly(vinyl chloride)-coated fabric, silica aerogel composite, thermal insulation, lightweight PVC, thermal conductivity coefficient, Knudsen effect, transient plane source, environment-friendly (green) poly(vinyl chloride)
National Category
Industrial Biotechnology
Research subject
Resource Recovery
Identifiers
urn:nbn:se:hb:diva-3733 (URN)000361155500002 ()2-s2.0-84945903473 (Scopus ID)
Available from: 2015-12-06 Created: 2015-12-06 Last updated: 2018-12-01Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0002-1404-9134

Search in DiVA

Show all publications