Review
Green & Sustainable Science & Technology
B. A. Collins, C. H. Birzer, P. W. Harris, S. P. Kidd, B. K. McCabe, P. R. Medwell
Summary: Biochar addition in anaerobic digesters is a promising way to enhance high-solids anaerobic digestion. By coupling a leach bed reactor (LBR) with a biochar-packed anaerobic filter (AF), the process efficiency can be improved by separating the digestion process between reactors. However, the effectiveness of phase separation is critical for the efficiency of this two-phase system.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
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
Environmental Sciences
Ahmet Duyar, Vildan Ciftcioglu, Kevser Cirik, Gokhan Civelekoglu, Serhan Urus
Summary: This study recommended coupling of conventional single-stage A/O with moving bed biofilm reactor and membrane bioreactor for landfill leachate treatment. The system achieved efficient removal of COD, nitrogen, and PAEs, with notable presence of various metal elements and important microbial activities in the AnoxMBBR and AeMBR.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Saeed Ghanbari Azad Pashaki, Mehdi Khojastehpour, Mohammadali Ebrahimi-Nik, Abbas Rohani
Summary: This study investigates the performance of a combined anaerobic-aerobic system in the treatment of leachate within 5 months. The optimal OLR was found to be 2.05 kg COD/m(3). day, achieving COD removal efficiency of 95.6% and BOD5 removal efficiency of 96.8%. The two-stage anaerobic phase increased some parameters while the aerobic phase reduced them.
Article
Agricultural Engineering
Jarungwit Boonnorat, Ryo Honda, Pornpan Panichnumsin, Nimaradee Boonapatcharoen, Nawamin Yenjam, Chananya Krasaesueb, Manyapron Wachirawat, Sestapong Seemuang-on, Rumpa Jutakanoke, Jantima Teeka, Sivakorn Angthong, Pradthana Prachanurak
Summary: This research investigates the efficiency and greenhouse gas emissions of non-floating and floating bed AS systems treating landfill leachate, finding that the floating bed AS system maintains stable treatment efficiency due to an abundance of effective bacteria. The study shows that CO2 emissions are positively correlated with organic loading and inversely correlated with HRT, while CH4 emissions are positively correlated with HRT, and N2O emissions are mainly linked to nitrogen loading.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Ben A. Collins, Cristian H. Birzer, Stephen P. Kidd, Tony Hall, Paul R. Medwell
Summary: Due to the rapid growth of the poultry industry, chicken litter has become a significant and problematic waste. An effective solution is anaerobic digestion with the use of biochar, particularly when placed within a leach bed reactor system. This study examines the impact of biochar positioning on anaerobic digestion of chicken litter and finds that mixing biochar in the feedstock and placing it below the feedstock significantly enhances methane production and hydrogen sulfide removal, leading to improved waste treatment efficiency.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Asma Hanif, Lucas Loetscher, Sybil Sharvelle
Summary: The addition of a top sand layer to leach bed reactors (LBRs) can facilitate the processing of drylot cattle manure containing up to 90% total solids without hydraulic failure. The system operated as a batch process for 42 days showed a mean total chemical oxygen demand (COD) reduction of 51.6% and a total volatile solids reduction of 44.7% in manure. The appropriate operational time for the system was found to be 14 days.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Environmental Sciences
Nguyen Hong Dan, Tran Le Luu
Summary: This study presents the use of electrocoagulation combined with persulfate to treat landfill leachate, demonstrating significant removal efficiencies for COD, color, TOC, and TN. By optimizing key parameters such as PS concentration, reaction time, and pH, the EC-PS process shows promising results in effectively treating bio-digested landfill leachate.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Chemical
Luis Fernando Saldarriaga, Fernando Almenglo, Domingo Cantero, Martin Ramirez
Summary: The use of landfill leachate as a nutrient source can significantly improve CO2 absorption efficiency, but it may result in a lower pH, making CO2 uptake slightly more difficult.
Article
Agricultural Engineering
Fengchao Wang, Ningbo Gao, Aneta Magdziarz, Cui Quan
Summary: This study investigated the distribution of biomass pyrolysis products under high pressure, confirming the synergistic effect between side wall rubber and pine sawdust under pressurized conditions. The quality of pressurized co-pyrolysis products can be enhanced using calcined bottom ash and rubber char, but the chars obtained under high pressure conditions exhibited melting and cross-linking issues.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Joerg Steinbrenner, Anastasia Oskina, Joachim Mueller, Hans Oechsner
Summary: The aim of this study was to develop an automated technical-scale leach bed reactor system for VFA production and successfully suppress methane formation using pH-controlled flushing mode.
BIORESOURCE TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Ville Pyykkonen, Erika Winquist, Ari-Matti Seppanen, Markku Vainio, Elina Virkkunen, Kari Koppelmaki, Saija Rasi
Summary: This study examines the feasibility of dry anaerobic digestion for renewable energy production and nutrient recycling using solid agricultural biomass. Methane production and nitrogen levels were measured in both pilot and farm-scale reactors. The results showed high methane production in the pilot-scale, while the farm-scale experiments suffered from nitrogen loss. Although the technology shows promise, management practices need to be improved to minimize environmental impact.
BIOENGINEERING-BASEL
(2023)
Article
Thermodynamics
Panagiotis Tsapekos, Laura Treu, Stefano Campanaro, Victor B. Centurion, Xinyu Zhu, Maria Peprah, Zengshuai Zhang, Panagiotis G. Kougias, Irini Angelidaki
Summary: This study demonstrates the production of high-purity methane through biological CO2 hydrogenation under real environmental conditions with a trickle bed reactor. The microbial community in the reactor showed distinct clustering characteristics, with different layers of packing material and liquid phase having varying effects on the reaction process.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Energy & Fuels
Behzad Kamyab, Hamid Zilouei
Summary: The experiment used a mixed-UASB reactor to treat baker's yeast wastewater, showing that an increase in inlet wastewater concentration led to higher removal of organic compounds, but lower methane production efficiency. Chemical oxygen demand efficiency ranged from 9.05% to 35.98% at concentrations of 1.55 to 4.1 mg COD cm(-3). At the end of 40 days, the volume of biogas obtained from the wastewater was 113.4 L.
Article
Energy & Fuels
R. Yukesh Kannah, K. Bhava Rohini, M. Gunasekaran, K. Gokulakrishnan, Gopalakrishnan Kumar, J. Rajesh Banu
Summary: In this study, a lab-scale reactor was used to treat landfill leachate, and an ANN model was developed to assess the substrate concentration and biogas yield. The results showed that an OLR of 16.27 kg COD/m(3)d was the optimum condition, resulting in the highest biogas production of 30.07 L/d with 64% methane content and 89.6% COD removal.
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
Engineering, Environmental
Markus Koppanen, Tero Kesti, Marika Kokko, Jukka Rintala, Marja Palmroth
Summary: Contamination detection in drinking water is crucial for water utilities. Current online water quality sensors have limitations, so we used flow-imaging particle counters and conventional sensors to assess their responses. The flow-imaging particle counter detected all contaminants, with the oxidation-reduction potential sensor performing the best. Particles smaller than 1 mu m were important for detecting contaminants, but had lower response compared to larger particles due to fluctuations. Monitoring particles larger than 1 mu m or specific particle classes can improve contamination detection.
Article
Agricultural Engineering
Anna Hamalainen, Marika Kokko, Viljami Kinnunen, Tuomo Hilli, Jukka Rintala
Summary: Hydrothermal carbonization (HTC) can convert mixed sludge from the pulp and paper industry into value-added products, facilitating energy, carbon, and nutrient recovery.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Khaliyah Sani, Rattana Jariyaboon, Sompong O-Thong, Benjamas Cheirsilp, Prasad Kaparaju, Yi Wang, Prawit Kongjan
Summary: This study attempted to co-digest waste-activated sludge (WAS) and greasy sludge (GS) using a two-stage anaerobic digestion process. The results showed that this process was effective in stabilizing the waste and generating valuable bioenergy carriers.
Article
Energy & Fuels
Erika Conde, Prasad Kaparaju
Summary: This study investigated the effect of temporal variation in chemical composition on methane yields of rendering plant wastewater through batch experiments. The results showed significant differences in the chemical composition of the wastewater samples collected throughout the week, which in turn affected the methane production.
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
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)
