Exergy analysis and optimization of bio-methane production from corn stalk pretreated by compound bacteria based on genetic algorithm

Article Green & Sustainable Science & Technology

Energy and exergy analysis of forced and natural convection indirect solar dryers: Estimation of exergy inflow, outflow, losses, exergy efficiencies and sustainability indicators from drying experiments

Vishnuvardhan Reddy Mugi et al.

Summary: Energy and exergy analysis (EEA) was conducted to compare the performance of an indirect solar dryer (ISD) under forced and natural convection conditions, showing that forced convection ISD outperformed natural convection ISD.

JOURNAL OF CLEANER PRODUCTION (2021)

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Article Green & Sustainable Science & Technology

Energy and exergy analysis of the drying of corn grains

Gisele Mol da Silva et al.

Summary: A mixed cabin solar dryer with a photovoltaic module for power was designed and tested in Brazil, achieving a faster drying time for corn grains compared to natural sun drying. The dryer also used the PV module to preheat drying air, improving overall efficiency.

RENEWABLE ENERGY (2021)

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Article Agricultural Engineering

Comparison of response surface methodology (RSM) and artificial neural network (ANN) modelling for supercritical fluid extraction of phytochemicals from Terminalia chebula pulp and optimization using RSM coupled with desirability function (DF) and genetic algorithm (GA) and ANN with GA

Avinash Kumar Jha et al.

Summary: The study optimized the supercritical fluid extraction parameters for extracting phytochemicals from Terminalia chebula pulp, predicting responses using RSM and ANN, and using different optimization methods. The results showed that RSM was slightly better than ANN, and RSM-GA and RSM-DF provided higher values of TPC, TFC, and DPPH activity compared to ANN-GA.

INDUSTRIAL CROPS AND PRODUCTS (2021)

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Article Environmental Sciences

Start-up phase optimization of two-phase anaerobic digestion of food waste: Effects of organic loading rate and hydraulic retention time

Carina Malinowsky et al.

Summary: This study investigated the impact of organic loading rate (OLR) and hydraulic retention time (HRT) on the dynamics of acidogenic and methanogenic processes in two-phase anaerobic digestion of food waste. Higher OLR was found to benefit methane production, with valeric acid dominating the acidogenic reactor and butyric acid being converted into methane in the methanogenic reactor. The study also showed that variables analyzed in the acidogenic reactor have an influence on the methanogenic reactor.

JOURNAL OF ENVIRONMENTAL MANAGEMENT (2021)

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Article Agricultural Engineering

Effective pretreatment of lignocellulosic co-substrates using barley straw-adapted microbial consortia to enhanced biomethanation by anaerobic digestion

Mahendra P. Raut et al.

Summary: This study demonstrated that microbial pretreatment with BSAM significantly improved the digestibility and surface area of lignocellulosic material, enhancing biomethanation process and methane production.

BIORESOURCE TECHNOLOGY (2021)

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Article Agricultural Engineering

Combined fungal and bacterial pretreatment of wheat and pearl millet straw for biogas production - A study from batch to continuous stirred tank reactors

Monika Yadav et al.

Summary: In this study, chitinolytic bacteria were used for bioaugmentation of fungal pretreated agricultural residues to enhance biogas production. Batch and continuous experiments showed that the addition of chitinolytic bacteria to wheat and pearl millet straw pretreated with Chaetomium globosporum resulted in increased biogas yield. Microbial community analysis revealed higher abundance of methanogens in reactors running with pretreated wheat straw, mainly consisting of Firmicutes, Bacteroidetes, Proteobacteria phyla.

BIORESOURCE TECHNOLOGY (2021)

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Article Agricultural Engineering

Effect of microaerobic microbial pretreatment on anaerobic digestion of a lignocellulosic substrate under controlled pH conditions

Haipeng Xu et al.

Summary: Microaeration microbial pretreatment effectively promoted hydrolysis and acidogenesis of corn stover, with pH significantly affecting total solid reduction, VFA, and sCOD accumulation patterns by shifting microbial communities. Different pH levels and pretreatment times had varying effects on methane yield, with a 12-h pretreatment at pH 8 resulting in a 16.6% increase in methane yield compared to untreated samples.

BIORESOURCE TECHNOLOGY (2021)

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Article Environmental Sciences

Optimizing lime pretreatment of rice straw for biolipid production using oleaginous microorganisms

Hoa Thai Doan et al.

Summary: This study focused on lime pretreatment of rice straw in northeast Vietnam for microbial lipid production, using a response surface methodology to optimize parameters. The optimal pretreatment conditions for maximal lipid yield were determined, with saturated, monounsaturated (MUFA), and polyunsaturated (PUFA) fatty acids composing the bio-lipid.

CHEMOSPHERE (2021)

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Review Agricultural Engineering

Anaerobic co-digestion: Current status and perspectives

Renisha Karki et al.

Summary: Co-digestion technology offers enhanced digestibility, improved process stability, and higher nutrient value compared to mono-digestion. A critical comparison of mono-digestion and co-digestion reveals the latter's greater flexibility and sustainability in handling diverse feedstocks.

BIORESOURCE TECHNOLOGY (2021)

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Review Biochemistry & Molecular Biology