Article
Agricultural Engineering
Pengfei Li, Di Liu, Zhanjiang Pei, Lixin Zhao, Fengmei Shi, Zonglu Yao, Wenzhe Li, Yong Sun, Su Wang, Qiuyue Yu, Lei Chen, Jie Liu
Summary: This study successfully modified the ADM1 model to simulate anaerobic digestion processes of various lignocellulosic substrates, revealing the significant inhibitory effect of lignin on cellulose hydrolysis. The study introduced the lignin inhibition index (LII) as a quantifiable measure for the inhibitory strength of lignins.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Mohammad Shaiful Alam Amin, Md. Salatul Islam Mozumder, Frank Stuber, Jaume Giralt, Agusti Fortuny, Azael Fabregat, Josep Font
Summary: A mathematical model was developed to describe the steady-state behavior of ceramic-supported graphene oxide membrane bioreactors treating wastewater with azo dyes. The model was calibrated and validated using experimental data and it was found that support materials with high electron transfer capacity increased the biofilm activity and hydrolysis rate. Acetate as an external carbon source improved dye removal efficiency, but the acetate to dye ratio did not directly affect the removal efficiency.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2023)
Review
Environmental Sciences
Xiangkun Li, Changkuo Liu, Hongwei Xie, Yujie Sun, Shiwei Xu, Gaige Liu
Summary: Thermal hydrolysis (TH) pretreatment, used in anaerobic digestion (AD), has been proven effective in the laboratory and utilized in engineering. However, the properties of AD liquid (ADL), such as high organic matter and ammonia nitrogen concentration, present challenges in subsequent treatment. To overcome this, the autotrophic nitrogen removal (ANR) process is developed. This paper reviews the TH-ADP and ANR mechanisms, addresses difficulties in treating TH-ADL, evaluates current research status, and proposes potential solutions.
Review
Engineering, Environmental
Vahid Toutian, Matthias Barjenbruch, Christian Loderer, Christian Remy
Summary: Thermal alkaline pretreatment (TAP) of waste activated sludge (WAS) before anaerobic digestion (AD) can increase biomethane yield, with the effect depending on the initial biodegradability of the waste. Parameters such as treatment temperature, alkali dosage, and treatment time have significant impacts on the yield and should be carefully controlled. Further research is needed to understand the effects of TAP on the kinetics of the entire AD process and digestate dewaterability.
Article
Agricultural Engineering
Muhammad Sohail, Alam Khan, Malik Badshah, Allan Degen, Guo Yang, Hu Liu, Jianwei Zhou, Ruijun Long
Summary: This study reveals that yak rumen fluid as an inoculum can enhance the degradability of sheep manure and increase biogas production, with its key component being the abundant hydrolytic bacteria.
BIORESOURCE TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
James A. Gomez, Luis G. Matallana, Oscar J. Sanchez
Summary: This study designed a biorefinery process for valorization of plantain residues, including the production of single-cell protein, natural fibers, and biomethane. Process simulation and techno-economic evaluation were conducted to determine the best option. The results showed that the production of natural fibers had the highest economic value.
FERMENTATION-BASEL
(2022)
Article
Agricultural Engineering
Daniel Pleissner, Astrid Victoria Lindner, Nicole Handel
Summary: The study explores the non-sterile heterotrophic cultivation of Galdieria sulphuraria in the presence of digestate and straw hydrolysate. Results indicate that proteolytic treatment of digestate can enhance growth rates and cell concentrations of G. sulphuraria, and the algae can utilize glucose obtained after straw hydrolysis. This research may offer promising strategies for utilizing agricultural waste streams to produce algal biomass rich in proteins.
BIORESOURCE TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Eric Caroca, Mariela Elorrieta, Carolyn Palma, Daniel Navia, Raquel Lebrero, Andrea Carvajal
Summary: This study successfully valorized common bean pods through a sequential process of SSF with the WRF T. versicolor and SSAD, producing stable and effective enzymes as well as biogas from the remaining solids.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Environmental Sciences
Junguo He, Lin Li, Jie Zhang, Xuewei Wu, Biqing Li, Xia Tang
Summary: Producing MCFAs from simple substrates like ethanol and acetate showed rapid results, while using waste activated sludge (WAS) led to poor performance due to inefficient bacterial hydrolysis. Ethanol presence improved the process to some extent, with electron extraction primarily from ethanol rather than WAS observed in chain elongation microbial consortia.
Article
Environmental Sciences
Hamed Baniamerian, Parisa Ghofrani-Isfahani, Panagiotis Tsapekos, Merlin Alvarado-Morales, Mohammad Shahrokhi, Irini Angelidaki
Summary: The study found that metals such as nickel and iron are crucial for the anaerobic digestion process, and utilizing nickel and iron coated on TiO2 nanoparticles can enhance hydrolysis rate and methane production of substrates.
Article
Biotechnology & Applied Microbiology
Brayan Alexis Parra-Orobio, Lina Marcela Giron-Bol, Daniel Felipe Gomez-Munoz, Luis Fernando Marmolejo-Rebellon, Patricia Torres-Lozada
Summary: Hydrolysis is the key step in anaerobic digestion of solid waste, and can be accelerated through temperature and exposure time adjustments. Proper pre-treatment conditions can reduce lignin, increase hemicellulose, and promote methane production.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Environmental Sciences
Meng Gao, Jiahui Yang, Siqi Li, Sinan Liu, Xiaofeng Xu, Feng Liu, Li Gu
Summary: This study explored a method to improve the anaerobic digestion of excess sludge and incineration leachate, revealing the potential mechanism of the AD process. The results showed that adding appropriate amounts of incineration leachate could enhance the efficiency of solubilization, hydrolysis, acidogenesis, and methanogenesis, leading to higher methane yields and improved digestive performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Thermodynamics
D. Fernandez-Polanco, E. Aagesen, M. Fdz-Polanco, S. I. Perez-Elvira
Summary: Anaerobic digestion is commonly used for sludge treatment in WWTPs, with thermal hydrolysis being favored for its economic advantages. The decision to adopt TH technology varies based on local regulations and pricing, with different objectives leading to different optimal configurations. Pre-, inter- and post-treatments of TH process offer distinct advantages and drawbacks, with site-specific conditions being key in determining the best location within the WWTP.
Article
Engineering, Chemical
James A. Gomez, Luis G. Matallana, Jose A. Teixeira, oscar J. Sanchez
Summary: This study proposed a general methodological framework for the design and analysis of multi-input biorefineries to maximize the valorization of plantain agro-industry residues. The framework involved independent processing of starchy and lignocellulosic materials and employed process simulation and hierarchical process design procedures. A case study applied the framework to design a biorefinery and identified the distribution of key residues that maximized the net present value. The results demonstrated the high potential of plantain residues as feedstock for value-added product production.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Environmental Sciences
E. Ortega-Martinez, R. Chamy, D. Jeison
Summary: Thermal hydrolysis as a pre-treatment can enhance hydrolysis rate before anaerobic digestion, but inhibitory compounds and increased liquid fraction colour may be potential drawbacks. This study found that different temperatures led to different outcomes, with a decrease in biogas production rate at 120 degrees C and generation of recalcitrant material at 165 degrees C, causing a decrease in methane potential and COD degradation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
