Article
Agricultural Engineering
Bin Zhang, Jing Li, Xiucai Liu, Jie Bao
Summary: Continuous fermentation is preferred in industrial bioprocesses due to its steady-state operation mode and reduced switch operation. However, the mismatch between optimal temperatures of enzymes and microbial cells has hindered continuous fermentation in lignocellulose biorefinery. This study successfully achieved continuous simultaneous saccharification and co-fermentation (SSCF) for high chiral purity L-lactic acid production using an engineered thermophilic lactic acid bacterium. The continuous SSCF operation reached high productivity and chiral purity, overcoming the limitations of batch SSCF and offering a prototype for industrial cellulosic lactic acid production.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Biotechnology & Applied Microbiology
Lihua Zou, Shuiping Ouyang, Yueli Hu, Zhaojuan Zheng, Jia Ouyang
Summary: The study developed a synthetic microbial consortium consisting of engineered Pseudomonas putida and lactic acid production specialist Bacillus coagulans to produce lactic acid from highly toxic lignocellulosic hydrolysate. The microbial coculture system demonstrated strong potential for producing valuable products from lignocellulosic hydrolysates containing complex inhibitors by recruiting consortia of robust microorganisms with desirable characteristics.
BIOTECHNOLOGY FOR BIOFUELS
(2021)
Article
Biotechnology & Applied Microbiology
Augchararat Klongklaew, Kridsada Unban, Dharman Kalaimurugan, Apinun Kanpiengjai, Hassan Azaizeh, Linda Schroedter, Roland Schneider, Joachim Venus, Chartchai Khanongnuch
Summary: This study demonstrated the bioconversion of lignocellulosic by-product corn stover to L-lactic acid using specific strains of bacteria. The optimal conditions for the highest sugar release and L-LA production were determined. The purification of L-LA from the culture broth was successfully achieved. This study not only presents a feasible process for L-LA production from corn stover but also provides an alternative approach for solving the problem of haze air pollution caused by improper management of corn production residuals.
FERMENTATION-BASEL
(2023)
Article
Agricultural Engineering
Shanling Gan, Yujia Li, Xiumin Zhang, Lirong Luo, Xinyi Xu, Jiaming Jiang, Yu Huo, Changhua Shang
Summary: In this study, distiller's grains were pretreated and detoxified to improve the production of tetramethylpyrazine. The optimal conditions for detoxification resulted in a significant increase in tetramethylpyrazine yield. This research provides a viable method for tetramethylpyrazine production from distiller's grains.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Engineering, Environmental
Rylan Cox, Vivek Narisetty, Eulogio Castro, Deepti Agrawal, Samuel Jacob, Gopalakrishnan Kumar, Deepak Kumar, Vinod Kumar
Summary: This study focused on the valorization of xylose derived from sugarcane bagasse and olive pits through hydrothermal and dilute acid pretreatment. The xylose-rich hydrolysate obtained was used for lactic acid (LA) production using a thermophilic Bacillus coagulans strain under non-sterile conditions. The maximum LA titers obtained were 97.8, 52.4, and 61.3 g/L with yields of 0.77, 0.66, and 0.71 g/g using pure xylose, xylose-rich sugarcane bagasse, and olive pit hydrolysates, respectively. A two-step aqueous two-phase system (ATPS) was employed for the recovery of LA from the xylose-rich stream, resulting in a recovery rate of 80-90%.
Article
Thermodynamics
Kai Hui Wong, Inn Shi Tan, Henry Chee Yew Foo, Li Min Chin, Joel Rui Neng Cheah, Jenny Kiing Sia, Kevin Tian Xiang Tong, Man Kee Lam
Summary: In this study, an innovative integrated biorefinery approach using macroalgae cellulosic residue for the coproduction of bioethanol and L-lactic acid was investigated. The simulation results showed that the approach was capable of efficiently producing high-quality bioethanol and L-lactic acid, and supplying part of the electricity requirement for the plant.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Chemistry, Analytical
Piyaluk Nurerk, Suppawan Sillapawisut, Opas Bunkoed, Wichitpan Rongwong, Maria Llompart
Summary: A porous composite monolith adsorbent was fabricated for the extraction of furfural and 5-hydroxymethyl-furfural from cellulosic biomass hydrolysate. The adsorbent exhibited good adsorption capacity and stability, and the extraction method was convenient and reusable.
MICROCHEMICAL JOURNAL
(2022)
Article
Polymer Science
Alexis Theodorou, Vasilios Raptis, Chrissie Isabella Maria Baltzaki, Thrassyvoulos Manios, Vagelis Harmandaris, Kelly Velonia
Summary: In this study, we performed synthetic experiments and kinetic modeling calculations to investigate the polycondensation process of lactic acid and the formation of poly(lactic acid) (PLA). The results showed that under optimized conditions, PLLA with a weight-average molecular weight of 161 kDa could be obtained. The kinetic parameters obtained from the optimization accurately reproduced the experimental data.
Article
Biotechnology & Applied Microbiology
Hassan Azaizeh, Hiba Nazmi Abu Tayeh, Roland Schneider, Joachim Venus
Summary: This study investigated the production of lactic acid using carob biomass bagasse, demonstrating the industrial feasibility of the fermentation process. The downstream process achieved high purity of lactic acid, making it suitable for various industrial applications.
FERMENTATION-BASEL
(2022)
Article
Engineering, Chemical
Pratibha Baral, Anushka Pundir, Akhilesh Kurmi, Raghuvir Singh, Vinod Kumar, Deepti Agrawal
Summary: This study demonstrates the successful extraction of L (+) lactic acid from sugarcane bagasse hydrolysate using salting-out assisted solvent extraction method. By combining tri-n-butyl phosphate and ethyl acetate as extractants, an efficiency of 59.63 +/- 1.28% extraction was achieved, which was further enhanced by the addition of ammonium sulfate. The eco-friendly approach using green solvents with mild operating conditions shows potential for industrial application.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Biotechnology & Applied Microbiology
Micaela G. Chacon, Christopher Ibenegbu, David J. Leak
Summary: This study evaluated nine thermophilic Bacillus and Parageobacillus species for growth and lactic acid fermentation at high temperature and low pH, identifying B. smithii SA8Eth as the most promising candidate. Using this strain, lactic acid was successfully produced from municipal solid waste cellulosic pulp in a simultaneous saccharification and fermentation process.
BIOTECHNOLOGY LETTERS
(2021)
Article
Agricultural Engineering
Lin Dai, Zhina Lian, Rui Zhang, Ali Nawaz, Ikram ul Haq, Xin Zhou, Yong Xu
Summary: Efficiency of gluconic acid production from cellulosic materials can be improved through a combined strategy of activated carbon treatment and high-tension oxygen supply, enabling industrial-scale production.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Biochemistry & Molecular Biology
Meijia Huang, Xin Li, Yong Wu, Xuanyi Meng, Ping Tong, Juanli Yuan, Anshu Yang, Zhihua Wu, Hongbing Chen, Chunhong Xiong
Summary: Lactobacillus rhamnosus was found to effectively degrade casein and reduce its potential allergenicity in this study. It hydrolyzed major allergen epitopes while preserving T cell epitopes. This is valuable for the application and development of lactic acid bacteria, and the hydrolysate can be used in hypoallergenic dairy products with specific health benefits and promoting oral tolerance.
JOURNAL OF FOOD BIOCHEMISTRY
(2022)
Article
Engineering, Environmental
Jing Li, Suan Shi, Yi Wang, Zhihua Jiang
Summary: The study showed that using paper mill sludge for cellulase production can be applied to lactic acid fermentation, yielding high purity of lactic acid with high productivity. It was also found that when using PMS as a substrate, corn steep liquor can substitute yeast extract as an inexpensive nutrient source.
Article
Food Science & Technology
Kun Yao, Dong-Mei Liu, Charles S. Brennan
Summary: L-lactic acid is an important organic acid widely used in pharmaceutical, food and textile industries, and Bacillus coagulans BCS13002 can efficiently produce L-lactic acid with GHCS as the carbon source. Key enzymes identified in proteomics analyses contribute to the higher production of L-lactic acid, providing a biological basis for using GHCS as a substitute for glucose.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(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)