Article
Green & Sustainable Science & Technology
Hao Jiang, Wenchuan Hao, Yeqing Li, Hongjun Zhou
Summary: Biological methanation process is beneficial for upgrading anaerobic digestion, efficient utilization of surplus electricity and H-2, energy storage and peak regulation, as well as CO2 emission reduction. Continuous stirred tank reactor (CSTR) is an economical and convenient method for methanation. The study found that the reactor could run stably at a pH around 8.5, and CO2 flow was adjusted for pH control. Different stages of the process showed significant succession in the microbial community.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Agricultural Engineering
Monika Yadav, Vivekanand Vivekanand
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)
Article
Agricultural Engineering
Hilal Unyay, Fatih Yilmaz, brahim Alper Basar, Nuriye Altinay Perendeci, Isik Coban, Erkan Sahinkaya
Summary: This study investigated long-term anaerobic digestion of switchgrass in batch and semi-continuous reactors, finding that methane yield varied at different Substrate to Inoculum ratios and organic loading rates. In the semi-continuous configuration, the optimal OLR was determined to be 1.0 gVS/(L.d), achieving 35% of the theoretical methane yield and 38% energy recovery.
BIOMASS & BIOENERGY
(2022)
Article
Energy & Fuels
Giuseppe Lembo, Silvia Rosa, Antonella Marone, Antonella Signorini
Summary: This study evaluated strategies to increase gas-liquid mass transfer in a gas stirred tank reactor (GSTR) using second cheese whey (SCW). The best performance was obtained with a high biogas recirculation rate, which resulted in an average H2 utilization efficiency of 88% and a methane concentration in biogas of 75%. The addition of H2 also significantly modified the methanogens community in the GSTR, with the Methanoculleus genus becoming dominant.
Article
Environmental Sciences
Swakshar Saha, Abid Hussain, Jangho Lee, Eunseok Lee, Hyung-Sool Lee
Summary: This study developed an integrated LBR-AnMBR system for efficient stabilization and biogas recovery from food waste at room temperatures. The system achieved high hydrolysis and acidification yields through the optimized leachate recirculation rate. The solubilized food waste was further stabilized in the AnMBR, resulting in high COD removal and methane yields. The system also produced high-quality permeates containing valuable nutrients for reuse.
Article
Engineering, Chemical
Leone Mazzeo, Antonella Signorini, Giuseppe Lembo, Irene Bavasso, Luca Di Palma, Vincenzo Piemonte
Summary: In this study, a novel configuration of BM digester, the Gas Stirred Tank Reactor (GSTR) filled with random packing, was modeled to explore the working principle of in situ Bio-Methanation. The research found that the mass transfer coefficient is the limiting step of the process, as indicated by a dimensionless analysis involving Stanton (St) and beta numbers.
Article
Engineering, Multidisciplinary
Ardian Indra Bayu, Rara Ayu Lestary, Nugroho Dewayanto, Melly Mellyanawaty, Agni Wicaksono, Roberty Wisnu Alvania Kartika, Deni Frans Sakka, Muhammad Mufti Azis, Wiratni Budhijanto
Summary: This study investigated the performance of thermophilic anaerobic digestion on sugarcane vinasse. The results showed that the combined effects of high temperature and vinasse composition increased the microbial-substrate affinity more than the microbial growth rate. Inhibitory effects were not observed with all tested organic loading rates.
RESULTS IN ENGINEERING
(2022)
Article
Agricultural Engineering
Ziqi Xu, Hairong Yuan, Xiujin Li
Summary: This study found that using longer hydraulic retention time and higher load in anaerobic bioconversion of rice straw can lead to increased biogas and methane production. Systems with different HRTs and loads have impacts on microbial richness, diversity, and bacterial and archaeal community compositions, thus affecting bioconversion efficiencies.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Dong-Mei Zhang, Qing Teng, Dongqing Zhang, Ghulam Jilani, Wei-Ming Ken, Zhi-Peng Yang, Tajwar Alam, Muhammad Ikram, Zahid Iqbal
Summary: The study investigated the impacts of magnesium-ammonium-phosphate (MAP) precipitation on the performance and microbial dynamics in an anaerobic continuously stirred tank reactor (CSTR) coupled with sequencing batch reactor (SBR) for swine wastewater treatment. Results showed an overall higher removal efficiency for COD, NH4+ and PO43- with MAP precipitation. The increase in microbial community richness and diversity with MAP was conducive to nitrogen and phosphorus removal, as well as biogas production.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Nor Habsah Md Sabiani, Husnul Azan Tajarudin, Wan Azlina Wan Ab Karim Ghani, Azni Idris, Azhari Samsu Baharuddin
Summary: This study evaluated the anaerobic digestion process of sonicated food waste using different kinetic models, with the Monod model proving to be the most suitable for understanding the system's kinetic parameters.
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Chemical
Sakina Belhamidi, Hanane Elkhdime, Omar Elrhaouat, Sarra Kitanou, Mohamed Taky, Azzeddine Elmidaoui
Summary: Vinasse is a major source of contamination in the ethanol beet production, but can be converted into biogas through anaerobic digestion, providing economic and environmental benefits. Laboratory studies showed that an inoculum/vinasse ratio of 0.3 resulted in optimal removal of pollutants and highest methane production, making it the most suitable parameter.
DESALINATION AND WATER TREATMENT
(2021)
Article
Environmental Sciences
A. S. Giwa, A. G. Memon, M. Vakili, Y. Ge, B. Wang
Summary: This research found that the digestion of a mixture of BW and FW (1:1 proportion) at 35 degrees Celsius in a serial semi-CSTR resulted in higher biogas production compared to single semi-CSTR at 55 degrees Celsius and 35 degrees Celsius. The physicochemical parameters of the serial semi-CSTR showed stable performance with 97% chemical oxygen demand reduction efficiency. The study concluded that the serial semi-CSTR digestion at 35 degrees Celsius offered advantages for increasing biogas yield and improving sludge stabilization for better water resources and waste management.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Agricultural Engineering
Qiong Yu, Chen Sun, Ronghou Liu, Dominic Yellezuome, Xianpu Zhu, Ruifeng Bai, Mingquan Liu, Mengzeng Sun
Summary: The study investigates the performance of biochar mediated anaerobic co-digestion of corn stover and chicken manure, showing that urea pretreatment and biochar addition can improve co-AD, with a synergistic effect under medium and high OLR conditions. The results reveal that urea pretreatment and biochar addition promoted the AD process by strengthening the buffer capacity system and improving the degradation of lignocellulosic biomass.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Shinichi Akizuki, Hiromi Joo, Mitsuhiko Koyama, Tatsuki Toda
Summary: This study found that deliberate starvation operation in an appropriate timeframe applied to a CSTR treating food waste is beneficial to proliferate cells and, at the same time, reduce residual substrate.
BIOPROCESS AND BIOSYSTEMS ENGINEERING
(2021)
Article
Engineering, Environmental
Xiang Fang, Yihuan Yan, Xiujin Li, Fajiang He, Jiyuan Tu
Summary: This study numerically investigated the dynamic characteristics of flow patterns in an industrial CSTR test site with a downward pumping agitation system and varied pitched blade turbine (PBT) design. A novel approach was developed to visually distinguish the agitation zone in the CSTR tank, quantitatively assess the agitation performance, and assist the design of impeller spacing. The findings revealed that the pitched angle had significant effects on the shape and size of formed circulation loops, with 45 degrees being the critical value beyond which the agitation zone would rapidly shrink.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Agricultural Engineering
Stefan Weiss, Walter Somitsch, Ingeborg Klymiuk, Slave Trajanoski, Georg M. Guebitz
BIORESOURCE TECHNOLOGY
(2016)
Article
Energy & Fuels
Markus Ortner, Lydia Rachbauer, Walter Somitsch, Werner Fuchs
Article
Biotechnology & Applied Microbiology
S. Weiss, M. Lebuhn, D. Andrade, A. Zankel, M. Cardinale, R. Birner-Gruenberger, W. Somitsch, B. J. Ueberbacher, G. M. Guebitz
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2013)
Article
Agricultural Engineering
S. Weiss, A. Zankel, M. Lebuhn, S. Petrak, W. Somitsch, G. M. Guebitz
BIORESOURCE TECHNOLOGY
(2011)
Meeting Abstract
Biochemical Research Methods
S. Weiss, D. Reinsberger, A. Zankel, M. Cardinale, R. Birner-Gruenberger, M. Lebuhn, W. Somitsch, G. M. Guebitz
Article
Engineering, Environmental
S. Weiss, M. Tauber, W. Somitsch, R. Meincke, H. Muella, G. Berg, G. M. Guebitz
Proceedings Paper
Energy & Fuels
Gayaneh Issayan, Bernhard Zettl, Walter Somitsch
Summary: This study focuses on a new method for stabilizing salt hydrates in composite materials by incorporating calcium and lithium chloride into clinoptilolite and vermiculite structures, aiming to achieve successful application of thermochemical storage technologies.
PROCEEDINGS OF THE 14TH INTERNATIONAL RENEWABLE ENERGY STORAGE CONFERENCE 2020 (IRES 2020)
(2021)
Article
Biotechnology & Applied Microbiology
Karl Portenkirchner, Josef Draxler, Walter Somitsch, Oliver Stassen
ENGINEERING IN LIFE SCIENCES
(2003)
Article
Biotechnology & Applied Microbiology
K Rittstieg, KH Robra, W Somitsch
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2001)
Article
Engineering, Environmental
M Kibret, W Somitsch, KH Robra
Article
Green & Sustainable Science & Technology
Lars odegaard Bentsen, Narada Dilp Warakagoda, Roy Stenbro, Paal Engelstad
Summary: This study investigates uncertainty modeling in wind power forecasting using different parametric and non-parametric methods. Johnson's SU distribution is found to outperform Gaussian distributions in predicting wind power. This research contributes to the literature by introducing Johnson's SU distribution as a candidate for probabilistic wind forecasting.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Xing Liu, Qiuchen Wang, Yunhao Wen, Long Li, Xinfang Zhang, Yi Wang
Summary: This study analyzes the characteristics of process parameters in three lean gas ethane recovery processes and establishes a prediction and multiobjective optimization model for ethane recovery and system energy consumption. A new method for comparing ethane recovery processes for lean gas is proposed, and the addition of extra coolers improves the ethane recovery. The support vector regression model based on grey wolf optimization demonstrates the highest prediction accuracy, and the multiobjective multiverse optimization algorithm shows the best optimization performance and diversity in the solutions.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Cairong Song, Haidong Yang, Xian-Bing Meng, Pan Yang, Jianyang Cai, Hao Bao, Kangkang Xu
Summary: The paper proposes a novel deep learning-based prediction framework, aTCN-LSTM, for accurate cooling load predictions. The framework utilizes a gate-controlled multi-head temporal convolutional network and a sparse probabilistic self-attention mechanism with a bidirectional long short-term memory network to capture both temporal and long-term dependencies in the cooling load sequences. Experimental results demonstrate the effectiveness and superiority of the proposed method, which can serve as an effective guide for HVAC chiller scheduling and demand management initiatives.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Zhe Chen, Xiaojing Li, Xianli Xia, Jizhou Zhang
Summary: This study uses survey data from the Loess Plateau in China to evaluate the impact of social interaction on the adoption of soil and water conservation (SWC) technology by farmers. The study finds that social interaction increases the likelihood of farmers adopting SWC, and internet use moderates this effect. The positive impact of social interaction on SWC adoption is more pronounced for farmers in larger villages and those who join cooperative societies.
JOURNAL OF CLEANER PRODUCTION
(2024)
Article
Green & Sustainable Science & Technology
Chenghua Zhang, Yunfei Yan, Kaiming Shen, Zongguo Xue, Jingxiang You, Yonghong Wu, Ziqiang He
Summary: This paper reports a novel method that significantly improves combustion performance, including heat transfer enhancement under steady-state conditions and adaptive stable flame regulation under velocity sudden increase.
JOURNAL OF CLEANER PRODUCTION
(2024)