Article
Biotechnology & Applied Microbiology
Valerie Garcia-Negron, Matthew J. Toht
Summary: This study demonstrates the viability of utilizing CO2 to produce Na2CO3 for efficient pretreatment of corn stover biomass. The pretreated biomass showed higher cellulose content and lower lignin content, resulting in higher and more stable glucose yields during enzymatic hydrolysis. The use of cellulase-rich enzyme solution further increased sugar concentrations.
FERMENTATION-BASEL
(2022)
Article
Green & Sustainable Science & Technology
Maryam Molaverdi, Keikhosro Karimi, Safoora Mirmohamadsadeghi, Mats Galbe
Summary: Sodium carbonate pretreatment can improve ethanol concentration at high solids and low enzyme loadings, and steam pretreatment can further increase ethanol concentration on this basis.
Article
Agricultural Engineering
Daozhu Xu, Cuiluan Ma, Mengjia Wu, Yu Deng, Yu-Cai He
Summary: Adipic acid is an important organic dibasic acid used in the manufacturing of plastics, lubricants, resins, fibers, etc. Using lignocellulose as feedstock for producing adipic acid can reduce production cost and improve bioresource utilization.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Patrick O. Saboe, Emily G. Tomashek, Hanna R. Monroe, Stefan J. Haugen, Ryan L. Prestangen, Nick S. Cleveland, Renee M. Happs, Joel Miscall, Kelsey J. Ramirez, Rui Katahira, Eric C. D. Tan, Jipeng Yan, Ning Sun, Gregg T. Beckham, Eric M. Karp
Summary: In this study, a membrane process was developed to fractionate low molecular weight lignin-related compounds from a lignin-rich biorefinery stream. The process showed high rejection of high molecular weight species and high recovery of desired compounds, and a process model was developed to evaluate its energy demand and cost drivers. This method offers a scalable and cost-effective way to fractionate lignin and improve carbon yields in the biorefinery.
Article
Agricultural Engineering
Li Yang, Yue Ru, Shuai Xu, Tongjun Liu, Liping Tan
Summary: Alkaline hydrogen peroxide (AHP) pretreatment can significantly enhance the enzymatic digestibility of lignocellulose by removing lignin, destroying hydrogen bonds and improving accessibility of cellulose, leading to reduced non-productive adsorption of cellulase.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
Hui Zhang, Junhui Wu
Summary: The sodium hydroxide pretreatment and enzymatic hydrolysis of corn stover powder were optimized using response surface methodology, resulting in optimal conditions for sugar production and product recovery, providing a reference for enhancing fermentable sugar yields.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Energy & Fuels
Shijun Pan, Gang Wang, Huan Chen, Sitong Zhang, Yanli Li, Mingzhu Guo, Futai Ni, Guang Chen
Summary: The study found that microbial/black liquor inoculation and black liquor inoculation improved the heating rate of compost, accelerating the formation of nitrogen structures and recalcitrant nitrogenous oxygenated compounds. FTIR analysis confirmed that microbial/black liquor inoculation promoted lignocellulose and lignin degradation in composting.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Energy & Fuels
Song Han Lee, Gang Xin Seah, Kun-Lin Yang
Summary: A novel catalytic alkaline hydrogen peroxide (cAHP) method was developed to shorten the pretreatment time and reduce hydrogen peroxide usage. Optimization using response surface methodology (RSM) showed that cAHP method can achieve higher reducing sugar yield compared to traditional AHP method.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Chemistry, Multidisciplinary
Xiangxue Chen, Xinchuan Yuan, Sitong Chen, Jianming Yu, Rui Zhai, Zhaoxian Xu, Mingjie Jin
Summary: The novel pretreatment method of Densifying Lignocellulosic biomass with alkaline Chemicals (DLC) significantly improves the density and durability of CS, preventing contamination and preserving sugars, facilitating biomass logistics. DLC-CS exhibits high enzymatic digestibility and fermentability, resulting in increased ethanol production. The promising results demonstrate the great potential of DLC pretreatment for lignocellulosic biofuel production.
Article
Materials Science, Paper & Wood
Jianjun Hu, Zhi He, Quanguo Zhang, Jiatao Dang, Shuheng Zhao, Shaoqi Yang, Panbo Yang, Xiaoyu Yan
Summary: Based on alkaline H2O2 pretreatment, the effects of reaction time, alkali concentration, and H2O2 concentration on the enzymatic digestion of corn stover were examined using photocatalytic alkaline H2O2 pretreatment (U-AHP). The optimum process conditions were found to be 1% NaOH, 2% H2O2, and a reaction time of 8 h, resulting in a lignin removal efficiency of 90.2% and a saccharification yield of 94.7%. Furthermore, U-AHP pretreatment caused structural damage to the maize straw and increased the crystallinity of the cellulose, suggesting a complex and multiple synergistic reaction mechanism.
Article
Engineering, Environmental
Samuel Ntakirutimana, Tao Xu, Ming -Zhu Ding, Zhi-Hua Liu, Bing-Zhi Li, Ying-Jin Yuan
Summary: The development of multifunctional pretreatments for effective and economical fractionation of lignocellulosic biomass, aiming at lignocellulose-oriented valorization, can lead to cutting-edge innovation in biorefinery. A high-solid chemomechanical pretreatment based on ball milling coupled with ethylenediamine was designed to maximize corn stover biomass output under mild temperature and active stabilization. The synergistic effects of this pretreatment brought about desirable characteristics that enhanced delignification and saccharification, while reducing solvent load and energy consumption compared to ethylenediamine pretreatment.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Multidisciplinary Sciences
Abraham Kusi Obeng, Duangporn Premjet, Siripong Premjet
Summary: The study found that using sodium hydroxide pretreatment and autoclaving technique can result in maximum glucose recovery from durian peel. The optimal pretreatment conditions were determined to be 2% NaOH concentration and 110 degrees C autoclave temperature.
Article
Energy & Fuels
Xiaohong Lu, Fei Li, Yiming Li, Shuo Fang, Xia Zhou, Zhezhen Zhao, Ping Liu
Summary: This study investigated the main components of black liquor derived from alkali combined with ozone pretreatment of straw recycling and their inhibitory effects on cellulose hydrolysis. Analyzing the composition of black liquor at different cycle times, it was found that alkali precipitation and organic matter were the main factors inhibiting enzymatic hydrolysis.
BIOENERGY RESEARCH
(2022)
Article
Agronomy
Iria Firvida, Pablo G. del Rio, Patricia Gullon, Beatriz Gullon, Gil Garrote, Aloia Romani
Summary: This study evaluated a delignification process using lime as an alternative alkali to improve enzymatic saccharification of corn stover cellulose, leading to successful production of bioethanol. Through experimental design, optimal conditions were identified for high cellulose and xylan recovery rates, delignification efficiency, and cellulose-to-glucose conversion rate.
Article
Biochemistry & Molecular Biology
Chaojun Wang, Wei Qi, Cuiyi Liang, Qiong Wang, Wen Wang, Zhongming Wang, Zhenhong Yuan
Summary: This study modified the calculation of severity factor to evaluate the effectiveness of alkaline pretreatment, finding that alkali loading is more important than temperature and time within a certain temperature range. Additionally, it was discovered that alkali loading contributes over 70% to the pretreatment cost.
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
(2021)
Article
Agriculture, Multidisciplinary
Jianjun Zang, Jason C. H. Shih, Jay J. Cheng, Zhimin Liu, Ying Liu, Wenqing Lu
RENEWABLE AGRICULTURE AND FOOD SYSTEMS
(2020)
Article
Agricultural Engineering
Pengfei Cheng, Koenraad Muylaert, Jay J. Cheng, Hui Liu, Paul Chen, Min Addy, Chengxu Zhou, Xiaojun Yan, Roger Ruan
BIORESOURCE TECHNOLOGY
(2020)
Article
Agricultural Engineering
Pengfei Cheng, Jay J. Cheng, Kirk Cobb, Chengxu Zhou, Nan Zhou, Min Addy, Paul Chen, Xiaojun Yan, Roger Ruan
BIORESOURCE TECHNOLOGY
(2020)
Article
Energy & Fuels
Shuangfei Li, Liangxu Liu, Jay Jiayang Cheng, Xuewei Yang
Summary: This paper presented a mechanism study of syngas production through lipid-extracted microalgal residues by investigating how the structure of these residues affected the pyrolysis characteristics. The results showed that both Chlorella sorokiniana 21 and Monoraphidium 3s35 residues could be pyrolyzed efficiently at low temperatures from 120 to 380 degrees C, with a final residue of less than 22.75%. The different pyrolysis characteristics between the two microalgal residues might be attributed to structural variations.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Agricultural Engineering
Pengfei Cheng, Ruirui Chu, Xuezhi Zhang, Lirong Song, Dongjie Chen, Chengxu Zhou, Xiaojun Yan, Jay J. Cheng, Roger Ruan
BIORESOURCE TECHNOLOGY
(2020)
Article
Engineering, Chemical
Yane Ansanay, Praveen Kolar, Ratna Sharma-Shivappa, Jay Cheng, Consuelo Arellano
Summary: In this study, activated carbon-supported sulfonic acid catalysts were synthesized and tested for pretreatment of switchgrass to glucose. The solid acid catalysts showed durability and maintained activity even after multiple cycles, indicating potential for reducing the use of conventional liquid acids and bases in biofuel production.
Article
Environmental Sciences
Yu Xiao, Chunping Yang, Jay J. Cheng
Summary: This study investigated the effects of sulfamethazine (SMZ) and cupric ion on the removal of NH4+-N and total phosphorus (TP) from anaerobically digested swine wastewater (ADSW) by duckweed. Duckweed showed excellent nutrient removal efficiency and tolerance to SMZ stress. However, the combined application of SMZ and cupric ion inhibited nutrient removal while increasing the contents of photosynthetic pigments, proteins, and vitamin E. Potential degradation pathways of SMZ in the duckweed system were proposed. This research provides a novel approach for nutrient removal and value-added product production using the duckweed system under the stress of SMZ and cupric ion.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Environmental Sciences
Shaohua Wu, Chunping Yang, Yan Lin, Jay J. Cheng
Summary: The study thoroughly examined the degradation of tetracycline (TC) in the constructed Co-N/C-PMS system, finding that the removal rate of TC reached 85.4% when Co-N/C and PMS were added simultaneously, with a higher degradation rate compared to using Co-N/C or PMS alone. The system was identified as a singlet oxygen-dominated nonradical reaction, providing a promising approach for eliminating TC in water treatment.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2022)
Article
Environmental Sciences
Chunfang Deng, Renxin Zhao, Zhiguang Qiu, Bing Li, Tong Zhang, Feng Guo, Rong Mu, Yang Wu, Xuejiao Qiao, Liyu Zhang, Jay J. Cheng, Jinren Ni, Ke Yu
Summary: This study recovered 1168 non-redundant metagenome-assembled genomes (MAGs) from landfill leachate samples in China, discovering new microbial taxa and carbohydrate-active enzymes. The methane production pathway and dissimilatory nitrate reduction to ammonium pathway were speculated and observed, respectively, in landfill leachate microbiota.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Biotechnology & Applied Microbiology
Shuangfei Li, Xianglan Chen, Ming Hung Wong, Huirong Chen, Li Tao, Guangyu Liufu, Jay Jiayang Cheng, Xuewei Yang
Summary: Desmodesmus sp.YT, rich in bioactive substances, showed impressive tolerance to various environmental conditions. This study investigated the metabolic transformation influenced by salt stress in Desmodesmus sp.YT through analysis of biochemical compositions and comparative transcriptome. Results showed that normal treatment enhanced biomass and protein production, while salt stress stimulated cellulose and starch biosynthesis. Desmodesmus sp.YT cultured in freshwater could be used as feed additives, while microalgae grown in seawater had potential for biofuel production.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2022)
Article
Agricultural Engineering
Wenkai Nie, Yan Lin, Xin Wu, Shaohua Wu, Xiang Li, Jay J. Cheng, Chunping Yang
Summary: In this study, chitosan-Fe3O4 was prepared and its effects on anaerobic digestion processes under acid stress were investigated. The results revealed that chitosan-Fe3O4 significantly increased the methanogenesis rate and accelerated the restoration of acidified anaerobic systems. The analysis of sludge characteristics indicated that chitosan-Fe3O4 promoted the secretion of proteins and humic substances, and enhanced the electron transfer activity of the system. Microbial community analysis showed that chitosan-Fe3O4 enriched the abundance of Peptoclostridium and facilitated direct interspecies electron transfer. These findings suggest that chitosan-Fe3O4 can be used to improve the efficiency of anaerobic digestion of high concentration organic wastewater under acid inhibition conditions.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Chengxi Li, Yan Lin, Xiang Li, Jay J. Cheng, Chunping Yang
Summary: Hormesis has been a topic of concern in the environmental and toxicological communities. Previous studies have focused on the hormesis induced by stressors in terms of their biotoxicity, but little research has been done on hormesis in the context of biological wastewater treatment processes. In this study, the removal of NH4+-N and Cu2+ by S. polyrrhiza was investigated under long-term exposure to environmentally relevant concentrations of Cu2+ in swine wastewater. The results showed that long-term exposure to Cu2+ enhanced the removal of NH4+-N by S. polyrrhiza, and previous exposure to low doses of Cu2+ significantly improved the removal efficiency in a second exposure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Agricultural Engineering
Zhiwei Huang, Qiuya Niu, Wenkai Nie, Yan Lin, Shaohua Wu, Xiang Li, Jay J. Cheng, Chunping Yang
Summary: The high concentrations of antibiotics in swine wastewater may have potential adverse effects on anaerobic digestion (AD). Previous studies focused on the effects of antibiotic concentrations but did not consider the fluctuation of swine wastewater quality and reactor operating conditions in practical engineering applications. This study found that continuous addition of oxytetracycline for 30 days had no effect on AD performance in systems with COD of 3300 mg/L and HRT of 4.4 days. However, when COD and HRT were changed to 4950 mg/L and 1.5 days respectively, oxytetracycline at different concentrations had varying effects on methane yield and cell membrane.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Lillian Lower, Julia Cunniffe, Jay J. Cheng, William Joe Sagues
Summary: Achieving a circular economy and developing carbon negative technologies are crucial for sustainable development. Applying precision and regenerative agriculture as well as biorefining to food and agriculture systems can help achieve circularity and reduce carbon emissions.
JOURNAL OF THE ASABE
(2022)
Article
Engineering, Environmental
Zhao Tan, Yiwei Liu, Hongyu Liu, Chunping Yang, Qiuya Niu, Jay J. Cheng
Summary: HMF deteriorates the removal performance of activated sludge, reducing the removal rates of COD, TP and NH4+-N, while increasing EPS content and affecting the settleability and dewatering capacity of activated sludge. HMF also inhibits dehydrogenase activity in activated sludge and alters microbial functions. Microbial community analysis shows that some microbes are adversely affected by HMF while others better tolerate it.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
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)
