Journal ArticleDOI
Microwave vacuum co-pyrolysis of waste plastic and seaweeds for enhanced crude bio-oil recovery: Experimental and feasibility study towards industrialization
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In this paper, the authors evaluated the technical and economic feasibility of microwave vacuum co-pyrolysis of seaweeds and low-density polyethylene (LDPE) at different blend ratios.Abstract:
Waste-to-energy is a promising approach to tackle the energy shortage and reduce the environmental pollution. The present study aimed to evaluate the technical and economic feasibility of microwave vacuum co-pyrolysis of seaweeds and low-density polyethylene (LDPE). Although the three studied seaweeds namely; Ulva intestinalis, Sargassum polycystum, and Hypnea valentiae showed similar thermal weight loss profile, U. intestinalis showed the highest biomass and bio-oil yields which resulted in superior bio-oil areal productivity of 30.1 g m−2. Therefore, it was selected for co-pyrolysis with LDPE at different blend ratios. Compared to individual pyrolysis of U. intestinalis, the increase inLDPE ratio enhanced the crude bio-oil production with simultaneous reduction in bio-char yield. The experimental bio-oil yields from co-pyrolysis showed higher values than the corresponding theoretical values, confirming a synergistic effect between the two feedstocks. The bio-oil produced from co-pyrolysis at 75% LDPE blend ratio showed better characteristics compared to the individual pyrolysis. Van Krevelen plot suggested that LDPE produces hydrogen radicals during co-pyrolysis reactions, which increased the H/C ratio and reduced the O/C ratio. GC/MS analysis confirmed that the increase in LDPE stimulates hydrocarbons proportion up to 51.2% at 75% blend ratio with significant reduction in N-containing compounds, carboxylic acids, furans, aldehydes/ketones, saccharides, and phenols. The economic feasibility analysis at a feedstock feeding rate of 11.4 ton h−1 using Aspen Plus showed estimated net profit of 23.17 million US$ for a 20-years life time plant. The present study provides a potential approach for sustainable energy recovery from waste plastic/seaweeds blend using microwave vacuum co-pyrolysis.read more
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Journal ArticleDOI
Pilot-scale co-processing of lignocellulosic biomass, algae, shellfish waste via thermochemical approach: Recent progress and future directions
Peter Nai Yuh Yek,Wan Adibah Wan Mahari,Sieng Huat Kong,Shin Ying Foong,Wanxi Peng,H.-W. Ting,Changlei Xia,Christian Sonne,Meisam Tabatabaei,Fares Almomani,Mortaza Aghbashlo,Su Shiung Lam +11 more
TL;DR: In this paper , the design and operation of pilot-scale reactors for torrefaction, pyrolysis, and gasification, as well as the key parameters of co-processing biomass into targeted and improved quality products for use as fuel, agricultural application, and environmental remediation are discussed.
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Potential Applications of Arthrospira platensis Lipid-Free Biomass in Bioremediation of Organic Dye from Industrial Textile Effluents and Its Influence on Marine Rotifer (Brachionus plicatilis).
Ahmed E. Alprol,Ahmed M. M. Heneash,Mohamed Ashour,Khamael M. Abualnaja,Dalal Alhashmialameer,Abdallah Tageldein Mansour,Abdallah Tageldein Mansour,Zaki Zaki Sharawy,Mouhamed A Abu-Saied,Abd El-Fatah Abomohra +9 more
TL;DR: In this paper, the authors investigated the efficiency of ACDB and LFB in bioremediation of dye (Ismate violet 2R, IV2R) from textile effluents.
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Co-production of hydrochar, levulinic acid and value-added chemicals by microwave-assisted hydrothermal carbonization of seaweed
TL;DR: In this article , the authors investigated the valorization of Laminaria digitata to a range of products (primarily including hydrochar, levulinic acid and 5-hydroxymethylfurfural) through microwave-assisted hydrothermal carbonization.
Journal ArticleDOI
Valorization of lipidic food waste for enhanced biodiesel recovery through two-step conversion: A novel microalgae-integrated approach.
TL;DR: In this paper, the authors designed an innovative route for two-step biodiesel recovery from lipidic food waste followed by microalgae cultivation, which showed that mixing microalgal lipids with waste oil (1:1, w/w) provides a desirable practical route for enhanced biodiesel production complying with the international standards.
Journal ArticleDOI
Progress in thermochemical conversion of aquatic weeds in shellfish aquaculture for biofuel generation: Technical and economic perspectives.
Elfina Azwar,Elfina Azwar,Wan Adibah Wan Mahari,Hajar Rastegari,Meisam Tabatabaei,Meisam Tabatabaei,Wanxi Peng,Yiu Fai Tsang,Young-Kwon Park,Wei Hsin Chen,Su Shiung Lam,Su Shiung Lam +11 more
TL;DR: In this article, the potential and application of various aquatic weeds for generation of biofuels using recent thermochemical technologies (torrefaction, hydrothermal carbonization/liquefaction, pyrolysis, gasification) were discussed.
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