Article
Environmental Sciences
Alexander J. Schmithausen, Hauke F. Deeken, Katrin Gerlach, Manfred Trimborn, Kirsten Weiss, Wolfgang Buescher, Gerd-Christian Maack
Summary: This study investigated the formation of greenhouse gases during the ensiling process, focusing on the variations in CO2, N2O, and CH4 concentrations in forage. Grass and lucerne were ensiled at different dry matter concentrations in laboratory-scale barrels, showing that low DM concentration led to faster CO2 production, while lucerne forage and higher DM concentrations resulted in increased N2O concentrations. The study also found that butyric acid formation by clostridia contributed to CH4 formation, with lucerne silage exhibiting significantly higher concentrations from day 13 of ensiling. These findings highlight the impact of malfermentation on greenhouse gas emissions during ensiling.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Agriculture, Dairy & Animal Science
Sanne van Gastelen, Hendrik Jan van Dooren, Andre Bannink
Summary: The purpose of this study was to evaluate the balance between enteric and manure CH4 emissions from cows and to assess the magnitude of synergistic effects for CH4 and nitrogenous emissions. The results showed that when corn silage was replaced with grass silage in the diet, enteric CH4 and cow-associated NH3 and N2O emissions were relatively lower. However, the emissions of CH4 and N2O from stored manure were not affected by the diet, while NH3 emission tended to be lower.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Thermodynamics
D. Hidalgo, J. Castro, D. Diez, J. M. Martin-Marroquin, M. Gomez, E. Perez
Summary: This study demonstrates that thermal pretreatment can significantly improve the anaerobic digestion of barley straw and vine shoot, increasing methane production by reducing lag time and enhancing biogas yield. Analysis of the changes in lignocellulosic structure and hemicellulose content can explain this improvement phenomenon.
Article
Microbiology
Yao Fu, Songyang Yao, Tiankun Wang, Yongqiang Lu, Huigang Han, Xuening Liu, Dongying Lv, Xiao Ma, Shengyu Guan, Yujun Yao, Yunjie Liu, Haiying Yu, Shengli Li, Ning Yang, Guoshi Liu
Summary: This study investigates the effects of melatonin on methane production in cows and finds that melatonin treatment significantly reduces methane emission through multiple mechanisms.
Article
Agriculture, Dairy & Animal Science
Martyna Kozlowska, Adam Cieslak, Artur Jozwik, Mohamed El-Sherbiny, Maciej Gogulski, Dorota Lechniak, Min Gao, Yulianri Rizki Yanza, Mina Vazirigohar, Malgorzata Szumacher-Strabel
Summary: The study evaluated the effects of Lucerne silages of Kometa and Verko cultivars on ruminal fermentation and fatty acid proportions in dairy cows. Kometa Lucerne silages inhibited methane emission and microbial populations but increased saturated fatty acids in milk, while Verko Lucerne silages showed more promising results in certain aspects.
ANIMAL FEED SCIENCE AND TECHNOLOGY
(2021)
Article
Agriculture, Dairy & Animal Science
Mohammad Ramin, Juana C. Chagas, Hauke Smidt, Ruth Gomez Exposito, Sophie J. Krizsan
Summary: This study evaluated the potential trade-offs between different types of grass silage and supplementation of rapeseed oil on methane emissions in dairy cows. The results showed that including rapeseed oil in the diet reduced enteric methane emissions, while fecal methane emissions remained stable across different treatments.
Article
Agriculture, Dairy & Animal Science
P. Fant, H. Leskinen, M. Ramin, P. Huhtanen
Summary: This study analyzed the effects of replacing barley with oats on milk fatty acid composition in dairy cows. Two experiments were conducted, and the results showed that replacing barley with hulled oats linearly decreased the proportions of saturated fatty acids (SFA) and increased the proportions of monounsaturated fatty acids (MUFA) and cis unsaturated fatty acids (CUFA) in milk fat. The study also found that feeding cows oat diets led to lower proportions of SFA and higher proportions of MUFA and CUFA in milk fat compared to feeding them a barley diet. The findings suggest that replacing barley with oats can be a practical strategy to adjust the FA composition of milk according to international dietary guidelines.
JOURNAL OF DAIRY SCIENCE
(2023)
Article
Agricultural Engineering
Przemys Law Liczbinski, Sebastian Borowski, Weronika Cieciura-W
Summary: This study demonstrates that kitchen waste can be co-digested with pretreated grass at high loading rates, but the digesters must be operated at thermophilic temperatures. Metagenomic analysis reveals differences in microbial community composition during digestion processes at different temperatures.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Prakaidao Pomdaeng, Chen-Yeon Chu, Kobsak Sripraphaa, Hathaithip Sintuya
Summary: Napier grass has been identified as having the greatest potential for gaseous bioenergy production. A study evaluated the biohydrogen and biomethane yields from untreated Napier grass using anaerobic digestion technology in single-stage and two-stage continuous bioreactors. Results showed that the two-stage system performed better, with a 30% higher total energy recovery compared to the single-stage system.
BIORESOURCE TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Uchenna Egwu, Kennedy Onyelowe, Shamas Tabraiz, Emmanuel Johnson, Alexander D. Mutshow
Summary: The effects of feeding intervals, organic loading rates, and operating temperatures on specific methane production during anaerobic digestion were studied. Uneven feeding, trace element deficiency, accumulation of volatile fatty acids, and free ammonia nitrogen had negative impacts on CSTRs. However, even feeding and biomass ash extracts supplementation facilitated the recovery of failed CSTRs.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Biotechnology & Applied Microbiology
Rajan Dhakal, Giuseppe Copani, Bruno Ieda Cappellozza, Nina Milora, Hanne Helene Hansen
Summary: The objective of this study was to assess the effect of adding two DFM formulations on fermentation kinetics, methane production, and feed degradation in two different basal feeds while validating a newly established IVGPT laboratory. The results showed no significant differences between the laboratories and no significant differences in the effects of the DFM within the feed type. However, adding the P2 DFM may have the potential to reduce methane production without affecting organic matter degradation.
FERMENTATION-BASEL
(2023)
Article
Environmental Sciences
Carina Malinowsky, Willian Nadaleti, Leticia Rech Debiasi, Ailton Joao Goncalves Moreira, Remy Bayard, Armando Borges de Castilhos Junior
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)
Article
Energy & Fuels
Dawid Szwarc, Anna Nowicka, Katarzyna Glowacka
Summary: This study compares the effectiveness of pulsed electric field and microwave-induced disintegration in grass silage pretreatment for methane fermentation. Results show that PEF pretreatment significantly increases methane output compared to microwave pretreatment.
Article
Agronomy
Dannylo Sousa, Matilda Larsson, Elisabet Nadeau
Summary: This study evaluated the complete substitution of silage pulp (SP) for grass-clover silage in the diet of dairy cows and its impact on milk production. The results showed that cows receiving the silage-based diet had higher milk yield and energy corrected milk compared to those receiving the SP-based diet. Additionally, the silage-based diet led to higher milk protein and milk fat yields. However, diets did not significantly affect milk composition, body condition score, or body weight.
Article
Agriculture, Dairy & Animal Science
D. N. Brask-Pedersen, M. Lamminen, L. Mogensen, A. L. F. Hellwing, M. Johansen, P. Lund, M. Larsen, M. R. Weisbjerg, C. F. Borsing
Summary: The aim of the experiment was to determine the optimal ratio between maize silage and grass-clover silage in lactating dairy cow diets. The evaluation was based on nutrient digestibility, rumen metabolism, and total carbon footprint. Four diets varying in proportions of grass-clover silage and maize silage were fed to lactating Holstein cows. The results showed that increasing the proportion of maize silage in the feed ration led to an increase in dry matter intake and a decrease in methane emission.
Article
Environmental Sciences
P. Remor, J. A. Bastos, J. H. L. Alino, L. M. Frare, P. Kaparaju, T. Edwiges
Summary: This study evaluated the effect of mild alkaline pretreatment on sugarcane bagasse (SB) for improved methane production. The results showed that pretreated SB with NaOH and KOH had higher methane yield. Optimizing pretreatment parameters is crucial for enhancing anaerobic digestion of lignocellulosic substrates, leading to a more sustainable and profitable process.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Environmental Sciences
Oluchi Mbachu, Prasad Kaparaju, Chris Pratt
Summary: This study investigated plastic pollution in soil-based stormwater bioretention systems (BRS) and found that the plastic concentrations in BRS are comparable to other stormwater systems and soils in different land use areas. The study also revealed complex pathways of plastic transmission and accumulation in BRS, with plastic derived from various sources. The results suggest that gross pollutant traps are effective at reducing plastic pollution in BRS, but not as effective for microplastics.
ENVIRONMENTAL TECHNOLOGY
(2023)
Article
Agricultural Engineering
Napong Ketsub, Paul Whatmore, Mahsa Abbasabadi, William O. S. Doherty, Prasad Kaparaju, Ian M. O'Hara, Zhanying Zhang
Summary: This study investigated the effects of different pretreatment methods on biomethane production from sugarcane trash via solid state anaerobic digestion and revealed the dynamics of microbial community. The findings provide important information for developing bioaugmentation strategies to improve biomethane production by solid state anaerobic digestion of lignocellulosic biomass.
BIORESOURCE TECHNOLOGY
(2022)
Article
Energy & Fuels
Mehabub Rahaman, Tirthankar Mukherjee, Prasad Kaparaju, Saswata Bose
Summary: Iron oxide- and copper oxide-decorated reduced graphene oxide composite has been synthesized via a simple wet chemical oxidation-reduction method. The composite shows excellent thermal stability, porous structure, high specific capacitance, and energy density, making it a promising candidate for supercapacitor electrodes.
Article
Energy & Fuels
Mohamed El-Qelish, Pritha Chatterjee, Marika Kokko, Fatma El-Gohary, Mohamed Abo-Aly, Jukka Rintala
Summary: This study explores the possibility of producing hydrogen and methane from sedimented pulp and paper mill waste fibre for the first time. Two-stage thermophilic anaerobic digestion achieves the highest yields of hydrogen and methane, while reducing treatment time and increasing total energy yield.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Engineering, Chemical
Donya Kamravamanesh, Johanna M. Rinta Kanto, Harri Ali-Loytty, Antti Myllaerinen, Mikko Saalasti, Jukka Rintala, Marika Kokko
Summary: This study investigated the potential of using biowaste reject water as a nutrient source for hydrogen conversion in a thermophilic trickle bed reactor. The results showed that the use of reject water improved H2 conversion efficiency and methane productivity. However, trace element supply was necessary to stabilize the process performance at high H2 loading rates.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Energy & Fuels
Diego Moya, Cesar Arroba, Christian Castro, Cristian Perez, Sara Giarola, Prasad Kaparaju, Angel Perez-Navarro, Adam Hawkes
Summary: This study proposes a methodology to evaluate the impact of consumption drivers on domestic energy consumption in Ecuador between 2010 and 2020. It considers factors such as energy requirement, population density, outdoor temperature, and socioeconomic aspects. The results can be used for energy-planning strategies and can be reproduced in other countries and regions.
Review
Energy & Fuels
Nilay Kumar Sarker, Prasad Kaparaju
Summary: This review summarizes the research conducted on microalgae cultivation in outdoor photobioreactors (PBRs). It examines various aspects of outdoor algal cultivation in PBRs, such as temperature and light intensity control, photosynthetic efficiency, outdoor adaptation of strains, PBR designs, and the impact of weather on algal growth and biochemical composition. It also briefly reviews downstream processes and environmental and economic impacts. This review provides guidance for further research in this field.
Review
Engineering, Chemical
Vishakha Kaim, Jukka Rintala, Chao He
Summary: The increasing generation of e-waste poses a significant risk of REEs pollution if not properly disposed of. However, e-waste could be a secondary source for critical REEs mining. This review focuses on the selective recovery of REEs from e-waste using IL extraction as a sustainable alternative to traditional solvents. The use of ILs shows promising results in terms of extractability and selectivity, although further research is needed for real e-waste extraction efficiency and recovery rate.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Fahim Fayaz, Chao He, Avishek Goel, Jukka Rintala, Jukka Konttinen
Summary: Oxidative ethanol dry reforming using 10%Co/Al2O3 catalyst is a promising method to produce high-quality syngas, which can be upgraded to liquid biofuels and chemicals. Increasing the reaction temperature improves the conversion of ethanol and CO2, and yields higher amounts of H2 and CO.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Environmental Sciences
Markus Koppanen, Tero Kesti, Jukka Rintala, Marja Palmroth
Summary: Early warning systems monitoring drinking water quality need to distinguish between normal fluctuations and those caused by contaminants. This study used different sensors to monitor the water quality and found that certain particle classes and electrochemical sensors can effectively distinguish contamination from fluctuations. The study also provided insights into choosing water quality sensors for early warning systems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Josefine Probst, Sara J. Couperthwaite, Graeme J. Millar, Prasad Kaparaju
Summary: Zeolite N exhibits high selectivity and capacity for ammonium ions, making it suitable for applications such as wastewater treatment. This study investigated various process factors related to zeolite N synthesis scale-up, including reactant solution agitation, mother liquor recycling, zeolite washing strategies, clay source, reactor geometry, and materials of construction. The results showed that agitation did not significantly affect zeolite N formation rate at 120 ?, but promoted it at 100 ?. Mother liquor recycling reduced the need for chemicals and improved product quality. Excessive quartz content in the clay feedstock inhibited zeolite N growth. Using specific materials and reactor types could significantly shorten reaction time.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Josefine Probst, Sara J. Couperthwaite, Graeme J. Millar, Prasad Kaparaju
Summary: This study focused on the process flow design and manufacturing economics of Zeolite N synthesis. By implementing recycling strategies for mother liquor and wash water, the demand for certain materials was reduced, and water consumption as well as wastewater generation were minimized. The optimal economic model for Zeolite N synthesis was found to be the one with recycling of mother liquor and wash water, which resulted in the highest net present value and a shorter payback period.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
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)
