Article
Chemistry, Physical
Marco Chiappero, Francesca Cillerai, Franco Berruti, Ondrej Masek, Silvia Fiore
Summary: This study compared the effects of six different biochars on anaerobic digestion of mixed wastewater sludge, demonstrating that biochars with specific physical and chemical properties play a positive role in increasing methane production.
Article
Agricultural Engineering
Anna Christine Trego, B. Conall Holohan, Ciara Keating, Alison Graham, Sandra O'Connor, Michael Gerardo, Dermot Hughes, Umer Zeeshan Ijaz, Vincent O'Flaherty
Summary: This study demonstrates the feasibility of high-rate, direct treatment of low-strength municipal wastewater at low temperatures for the first time. Efficient removal of BOD from wastewater and the discovery of a highly adaptable core microbiome provide a foundation for next-generation municipal wastewater treatment.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
Zhi Wang, Yong Sun, Jingbo Qu, Fuli Yang, Jian Li, Beibei Yan
Summary: This study evaluated the effect of adding depolymerization wastewater on the digestive performance of corn stalk. The results showed that the addition of wastewater promoted the hydrolysis of corn stalk and increased methane production. Microbial community analysis indicated that this phenomenon was caused by the increasing activity of hydrolytic bacteria. This study proposed a new pretreatment method for the utilization of depolymerization wastewater.
Article
Environmental Sciences
Hui Yun, Bin Liang, Zhangwei He, Minghan Li, Simin Zong, Zhenfei Wang, Bin Ge, Peng Zhang, Xiangkai Li, Aijie Wang
Summary: This study investigates the influence of temperature variations and antibiotic stress on methane production in psychrophilic anaerobic digestion systems. The results show that methane production is initially inhibited in the presence of oxytetracycline (OTC) under low temperature conditions, but stimulated at 35°C. OTC also leads to shifts in the dominant methanogenic species, with Methanosaeta being replaced by Methanomethylovorans.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Eskandar Poorasgari, Banu Ormeci
Summary: Experimental and computational approaches were used to model the kinetics of volatile solids destruction during wastewater sludge digestion, taking into account the effects of water evaporation. New kinetic models were developed to predict volatile solids concentrations in different conditions. The study found that water evaporation is an important factor to consider for accurate determination of kinetic rate constants and solids reduction.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Jiadong Yu, Lixin Zhao, Zonglu Yao, Jing Feng, Xufeng Yuan, Hongliang Wang, Yi Liang, Jiankun Chen, Yizhuo Du, Ruixia Shen
Summary: The study investigates the synergistic characteristics of abiotic and biotic transformation to improve the methane production efficiency in thermophilic and mesophilic sequencing batch dry anaerobic digestion (SBDAD). A pilot scale experiment using corn straw and cow dung as lignocellulosic material shows significant differences in biogas production and VFA concentration and composition. The combination of first-order hydrolysis and a modified Gompertz model increases cellulose and hemicellulose conversion efficiency by 112.03% and 90.09%, respectively, at thermophilic temperatures. The microbial community exhibits different functional network relationships under the two temperature conditions. Simulation of SBD-AD engineering shows reduced heat energy consumption and increased net energy production at thermophilic temperatures.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Multidisciplinary
Filippo Fazzino, Rafael Luque, Emilia Paone, Altea Pedulla, Rossana Sidari, Paolo S. Calabro
Summary: This study proposes a laboratory-scale biorefinery strategy for orange peel waste (OPW), which includes ensiling, adding biological and chemical supplements, and anaerobic digestion (AD). The strategy successfully preserves the methane potential and stimulates the production of value-added compounds. The solid fraction of OPW, separated after long-term ensiling, retains about 50% of the methane potential of fresh OPW. Semi-continuous AD results in stable methane production even though nutrient supplementation is needed.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Engineering, Environmental
Haoyuan Xu, Tao Wang, Yunlong Zhou, Mingxing Zhao, Wansheng Shi, Zhenxing Huang, Wenquan Ruan
Summary: This study examined the impact of different phenol disinfectant concentrations on wastewater anaerobic digestion. The research findings revealed that an increase in phenol disinfectant concentration led to a decrease in cumulative methane production. The difference in methane yield between disinfectant concentrations of 0.04 mL/L, 0.2 mL/L, 0.4 mL/L, and 0.8 mL/L was not significant (P >= 0.05). However, concentrations of 1.6 mL/L and 2.4 mL/L caused a significant decrease in methane yield by 69.98% (P < 0.05) and 100% (P < 0.05), respectively. The addition of phenol disinfectant resulted in the accumulation of volatile fatty acids, affected the secretion of extracellular polymeric substances, and impacted anaerobic sludge formation. Additionally, the activity of acetate kinase and coenzyme F420 decreased with increasing disinfectant concentration.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2023)
Article
Agricultural Engineering
G. Srisowmeya, M. Chakravarthy, Argho Bakshi, G. Nandhini Devi
Summary: Two-stage anaerobic digestion (TSAD) is a promising strategy for enhancing process yield and stability, by reducing inhibitory effects of acidogenesis on methanogenesis. The study examined TSAD of rice wastewater and found that adopting two-stage anaerobic codigestion (TSACoD) with cow dung slurry improved process stability, performance and digestate quality. TSACoD increased yield by 58.69% and total energy recovery by 1.58 times, with an optimal ratio of RWW: CDS observed to be 25:75 (%v/v).
BIOMASS & BIOENERGY
(2021)
Article
Environmental Sciences
Yu-Chen Liu, Jang-Hyun Kang, Johng-Hwa Ahn
Summary: Microwave irradiation was used to strip ammonia (NH3) and improve the efficiency of anaerobic digestion. The experiment revealed that at a final temperature of 100 degrees C and microwave irradiation time of 5.5 min, the ammonia concentration decreased to 140 mg/L. The highest cumulative biogas production and efficiency of volatile solid removal were achieved at this condition. Additionally, the biogas production increased by 243% when the swine wastewater treated by NH3 stripping was compared to the untreated control at a hydraulic retention time of 10 days.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Engineering, Environmental
Sergi Astals, Juan Jose Chavez-Fuentes, Gabriel Capson-Tojo, Miroslav Hutnan, Paul D. Jensen
Summary: Studies have shown that LCFA can alleviate the inhibition of ammoniacal nitrogen to a certain extent, possibly due to the formation of a protective layer by LCFA that limits the diffusion of free ammonia into the cell, or provides a localized lower pH around the microbial cell. However, the inhibition of ammoniacal nitrogen and LCFA also involve other inhibitors, and the specific mechanisms are not fully understood.
Article
Agricultural Engineering
Hao Jiang, Fan Wu, Yuchang Wang, Lu Feng, Hongjun Zhou, Yeqing Li
Summary: In-situ hydrogen biomethanation is a promising technology for upgrading biogas quality, and investigating its characteristics under different conditions is crucial for its effectiveness. The experiments showed that hydrogenotrophic methanogenesis performed better at thermophilic conditions, with the highest methane content obtained when H2 and CO2 were fed at a 4:1 ratio with Methanothermobacter as the dominant genus.
BIORESOURCE TECHNOLOGY
(2021)
Article
Thermodynamics
Kavosh Karami, Keikhosro Karimi, Safoora Mirmohamadsadeghi, Rajeev Kumar
Summary: This study investigated the effects of biological pretreatment on biogas production from lignocellulosic biomass and studied the combination effect with other pretreatment methods. The results showed that aerobic digestion was the only pretreatment method that could individually improve methane yield from pinewood, but combining aerobic digestion with mild thermochemical pretreatment could achieve even higher methane yield.
Article
Engineering, Environmental
Eskandar Poorasgari, Banu Ormeci
Summary: This study developed multiple regression models to estimate the abundance of carbapenem resistance genes (CRGs) in sludge during anaerobic digestion. The non-linear models provided more accurate estimation of gene abundance, which could benefit researchers and practitioners in estimating the removal rate of target genes under different operational conditions.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Energy & Fuels
Huiban He, Ziyu Wang, Jing Yan, Weiwei Wang, Jinbo Zhu, Jingkang Chen, Daicheng Liu, Hongliang Wang, Zongjun Cui, Xufeng Yuan
Summary: This study evaluated the effect of conventional and interval temperatures on methanogenesis performance and microbial regulation in continuous anaerobic digestion (AD) of wilted corn straw. The results showed that interval temperature substantially enhanced methane yield and Methanosarcina played a crucial role in methane production at interval temperature. Furthermore, a high abundance of essential genes involved in methane metabolism was found in the interval temperature digester.
Article
Environmental Sciences
K. Hamraoui, J. A. Siles, A. F. Chica, M. A. Martin, H. El Bari
Summary: This study investigated the effect of hydrothermal pretreatment on the anaerobic digestion and co-digestion of pepper plants and eggplants. The modified Gompertz model was used to simulate the biomethanization behavior of the pretreated lignocellulosic substrates, and it successfully reproduced the experimental results.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Energy & Fuels
Kousar Jahan, Vikram Singh, Nitisha Mehrotra, Kalpana Rathore, Vivek Verma
Summary: This study synthesized activated carbon from chickpea peel waste and investigated the effect of different conditions on dye removal performance. The results showed that the porous carbon prepared under the conditions of pre-carbonization at 400 degrees Celsius, KOH ratio of 1:3, and activation temperature of 800 degrees Celsius demonstrated excellent adsorption performance. These findings provide evidence for the feasibility of using chickpea peel waste as a low-cost and sustainable precursor for activated carbon material.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Review
Environmental Studies
R. Maniarasu, Sushil Kumar Rathore, S. Murugan
Summary: This review article provides a comprehensive review of the utilization, production, and characterization of biomass-based activated carbon for CO2 adsorption, including utilization research, characterization research, and research on enhancing adsorption performance.
ENERGY & ENVIRONMENT
(2023)
Article
Green & Sustainable Science & Technology
Hanieh Najafi, Seyedmehdi Sharifian, Neda Asasian-Kolur
Summary: This study focuses on the adsorption of gemifloxacin by rice straw-based activated carbon. The adsorption capacity of gemifloxacin was found to be dependent on the initial pH of the solution and the adsorbent dose. The pseudo-second order model and the BET isotherm models provided the best predictions for the adsorption kinetics and equilibrium behavior. The thermodynamic parameters indicated that the adsorption process is spontaneous and exothermic, with probable mechanisms involving n-pi, pi-pi, electrostatic interactions, and hydrogen bonding.
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2023)
Review
Biotechnology & Applied Microbiology
Johanna Andrea Serna-Jimenez, Jose Angel Siles Lopez, Maria de los Angeles Martin Santos, Arturo Fco Chica Perez
Summary: Banana and plantain waste can be developed into high-value products such as paper, rope, fuel, and animal and human feed. This waste also has the potential to be used for the production of ethanol, methane, hydrogen, single-cell protein, and as a substrate for mushroom cultivation. Integrated utilization of this waste in a biorefinery approach is presented.
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
(2023)
Article
Environmental Sciences
A. Ruiz-Munoz, J. A. Siles, P. Marquez, M. Toledo, M. C. Gutierrez, M. A. Martin
Summary: This study evaluated five urban wastewater treatment plants with different biological treatment, wastewater types, and sizes, aiming to analyze and compare odor emissions and identify the main causes. The results showed that facilities with EAAS technology were more efficient than RBC, and sludge management facilities were identified as the critical odor source. Chemometric analysis helped to find differences between the plants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Environmental Sciences
M. C. Gutierrez, M. A. Hernandez-Ceballos, P. Marquez, A. F. Chica, M. A. Martin
Summary: This research used gaseous samples, olfactometric and chemical analysis, air mass trajectory analysis, and dispersion modeling to evaluate the impact of odorous and VOC emissions from a waste treatment plant (WTP) on nearby communities. The study found that the mean removal efficiency of the WTP biofilter was 37.0%, with Tarrasa being the most affected community. These results highlight the significant deterioration of air quality caused by WTP emissions.
ATMOSPHERIC POLLUTION RESEARCH
(2023)
Article
Food Science & Technology
J. A. Serna-Jimenez, L. S. Torres-Valenzuela, A. Sanin Villarreal, C. Roldan, M. A. Martin, J. A. Siles, A. F. Chica
Summary: Two methods of extracting caffeine and total polyphenols from coffee pulp waste were evaluated. The ultrasound-assisted extraction (USAE) method showed higher extraction performance and lower energy requirement, making it a promising alternative for extracting biocompounds from coffee pulp waste.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2023)
Review
Engineering, Chemical
Johanna Andrea Serna-Jimenez, Jose A. Siles, Maria de los Angeles Martin, Arturo F. Chica
Summary: This article critically reviews the valorization process of coffee residues, including their composition and uses in various industries. With the increasing coffee production, there is an urgent need to properly utilize coffee wastes and by-products, which are renewable resources rich in carbohydrates, proteins, pectin, and bioactive compounds. The development of efficient and sustainable systems through biorefinery approaches and the circular economy represents promising opportunities.
Article
Agricultural Engineering
Yinping Xiang, Meiying Jia, Rui Xu, Jialu Xu, Lele He, Haihao Peng, Weimin Sun, Dongbo Wang, Weiping Xiong, Zhaohui Yang
Summary: This study investigated the impact of the non-antibiotic pharmaceutical carbamazepine on antibiotic resistance genes (ARGs) during anaerobic digestion. The results showed that carbamazepine induced the enrichment of ARGs and increased the abundance of bacteria carrying these genes. It also facilitated microbial aggregation and intercellular communication, leading to an increased frequency of ARGs transmission. Moreover, carbamazepine promoted the acquisition of ARGs by pathogens and elevated their overall abundance.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Weixin Zhao, Tianyi Hu, Hao Ma, Dan Li, Qingliang Zhao, Junqiu Jiang, Liangliang Wei
Summary: This review summarizes the effects and potential mechanisms of biochar on microbial behavior in AD systems. The addition of biochar has been found to promote microbial colonization, alleviate stress, provide nutrients, and enhance enzyme activity. Future research directions include targeted design of biochar, in-depth study of microbial mechanisms, and improved models.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Christina Karmann, Anna Magrova, Pavel Jenicek, Jan Bartacek, Vojtech Kouba
Summary: This review assesses nitrogen removal technologies in reject water treatment, highlighting the differences in environmental impacts and economic benefits. Partial nitritation-anammox shows potential for economic benefits and positive environmental outcomes when operated and controlled properly.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Wei-Hao Huang, Ying-Ju Chang, Duu-Jong Lee
Summary: This study modified pinecone biochar with layered double hydroxide (LDH) to enhance its adsorption capacity for heavy metal and phosphate ions. The LDH-biochar showed significantly improved adsorption capacities for Pb2+ and phosphate, and a slight increase for Cu2+ and Co2+. The LDH layer enhanced the adsorption through various mechanisms.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Chao Song, Fanfan Cai, Shuang Yang, Ligong Wang, Guangqing Liu, Chang Chen
Summary: This paper developed a machine learning model to predict the biochemical methane potential during anaerobic digestion. Model analysis identified lignin content, organic loading, and nitrogen content as key attributes for methane production prediction. For feedstocks with high cellulose content, early methane production is lower but can be improved by prolonging digestion time. Moreover, lignin content exceeding a certain value significantly inhibits methane production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sang Min Lee, Ju Young Lee, Ji-Sook Hahn, Seung-Ho Baek
Summary: This study successfully developed an efficient platform strain using Yarrowia lipolytica for the bioconversion of renewable resources into adipic acid, achieving a remarkable increase in production level.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Sefkan Kendir, Matthias Franzreb
Summary: This study presents a novel approach using magnetic separation to efficiently harvest freshwater microalgae, Chlorella vulgaris. By combining pH-induced calcium phosphate precipitation with cheap natural magnetite microparticles, harvesting efficiencies up to 98% were achieved in the model medium.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Ishaq Kariim, Ji-Yeon Park, Wajahat Waheed Kazmi, Hulda Swai, In-Gu Lee, Thomas Kivevele
Summary: The impact of reaction temperature, residence time, and ethanol: acetone on the energy compositions and yield enhancement of biocrudes was investigated. The results showed that under appropriate conditions, biocrudes with high energy and low oxygen content can be obtained, indicating a high potential for utilization.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xiyue Zhang, Xiyao Li, Liang Zhang, Yongzhen Peng
Summary: Intermittent aeration is an innovative approach to enhance nitrogen removal in low carbon-to-nitrogen ratio municipal sewage, providing an efficient strategy for the continuous plug-flow AOA process.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Xu Yang, Mahmoud Mazarji, Mengtong Li, Aohua Li, Ronghua Li, Zengqiang Zhang, Junting Pan
Summary: This study investigated the impact of magnetite on the nitrogen cycle of pig manure biostabilisation. The addition of magnetite increased N2O emissions and decreased NH3 emissions during composting. It also increased the total nitrogen content but should be considered for its significant increase in N2O emissions in engineering practice.
BIORESOURCE TECHNOLOGY
(2024)
Review
Agricultural Engineering
Ty Shitanaka, Haylee Fujioka, Muzammil Khan, Manpreet Kaur, Zhi-Yan Du, Samir Kumar Khanal
Summary: The market value of microalgae has exponentially increased in the past two decades, thanks to their applications in various industries. However, the supply of high-value microalgal bioproducts is limited due to several factors, and strategies are being explored to overcome these limitations and improve microalgae production, thus increasing the availability of algal-derived bioproducts in the market.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Martin Kerner, Thorsten Wolff, Torsten Brinkmann
Summary: The efficiency of using enriched CO2 from flue gas for large-scale production of green microalgae has been studied. The results show that the use of membrane devices and static mixers can effectively improve the CO2 recovery rate and maintain the suitable pH and temperature during cultivation, achieving a more economical and sustainable microalgae production.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rui Ma, Ji Li, Rd Tyagi, Xiaolei Zhang
Summary: This review summarizes the microorganisms capable of using CO2 and CH4 to produce PHAs, illustrating the production process, factors influencing it, and discussing optimization techniques. It identifies the challenges and future prospects for developing economically viable PHAs production using GHGs as a carbon source.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Bing Wang, Peng Zhang, Xu Guo, Xu Bao, Junjie Tian, Guomin Li, Jian Zhang
Summary: The addition of zeolite in the co-composting of chicken manure and straw significantly reduced the emissions of ammonia and N2O, and increased the nitrate content. Zeolite also promoted the abundance of nitrification genes and inhibited the expression of denitrification genes.
BIORESOURCE TECHNOLOGY
(2024)
Article
Agricultural Engineering
Rohit Dey, Franziska Ortiz Tena, Song Wang, Josef Martin Messmann, Christian Steinweg, Claudia Thomsen, Clemens Posten, Stefan Leu, Matthias S. Ullrich, Laurenz Thomsen
Summary: This study investigated the operation of a 1000L microalgae-based membrane photobioreactor system for continuous secondary wastewater treatment. The research focused on a green microalgae strain called Desmodesmus sp. The study aimed to understand key trends and optimization strategies by conducting experiments in both summer and winter seasons. The findings showed that maintaining low cell concentrations during periods of light inhibition was beneficial for nutrient uptake rates. Effective strategies for enhancing algae-based wastewater treatment included cell mass recycling and adjusting dilution rates based on light availability.
BIORESOURCE TECHNOLOGY
(2024)
