Article
Environmental Sciences
Kasra Khatami, Merve Atasoy, Maximilian Ludtke, Christian Baresel, Ozge Eyice, Zeynep Cetecioglu
Summary: The study investigated the impact of different sludge inoculums, pH levels, and retention times on the generation of VFAs during anaerobic digestion of food waste. Acetic acid was the dominant product under alkaline conditions, while propionic and acetic acids were dominant under acidic conditions.
Article
Engineering, Environmental
Qiqi Ping, Qian Fang, Yujia Chen, Wunxue Ding, Yanyu Xiao, Zhihui Wang, Wuyang Zhou
Summary: In this study, the effects of Fe3O4 on the production of volatile fatty acids (VFAs) in the anaerobic fermentation process of waste cooking oil (WCO) and aerobic sludge (AS) were investigated. The results showed that the addition of Fe3O4 promoted the hydrolysis and acidification of WCO, leading to an increase in VFAs and propionic acid concentration. Microbial community analysis revealed that Firmicutes, Proteobacteria, and Bacteroidetes were the main phylum involved in VFA production, with Veillonellaceae under Firmicutes being the main microorganism responsible for propionic acid production. This study provides new insights for the utilization of Fe3O4 in WCO treatment and propionic acid production.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Agricultural Engineering
Min Yang, Done Xie, Xinxin Ma, Ming Gao, Chuanfu Wu, Qunhui Wang
Summary: The study found that mesophilic anaerobic digestion is more effective for treating tylosin fermentation dreg, especially when co-digesting with food waste. However, thermophilic anaerobic digestion has higher methane production rate and hydrolysis rate, but lower residual antibiotics. The addition of food waste can enhance methane production rate and yield under both temperature conditions.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Md Nahid Pervez, Begum Bilgic, Amir Mahboubi, Clarisse Uwineza, Tiziano Zarra, Vincenzo Belgiorno, Vincenzo Naddeo, Mohammad J. Taherzadeh
Summary: The production of volatile fatty acids (VFAs) from food waste using a microfiltration immersed membrane bioreactor (MBR) and simultaneous recovery of VFAs shows great potential for application.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Barbara Tonanzi, Agata Gallipoli, Andrea Gianico, Maria Cristina Annesini, Simona Crognale, Giuseppe Mininni, Simona Rossetti, Camilla Maria Braguglia
Summary: Future sustainable technological solutions should balance the development of sludge as a resource with the need to protect human health and the environment. This study explored the feasibility of pretreating sludge with ultrasound and using anaerobic microorganisms to recover valuable resources. The results showed that acid addition and thermal treatment were effective strategies to promote solubilization and acidification of the system, while high abundance of hydrolytic and fermentative bacteria contributed to the successful conversion of volatile fatty acids into methane. The study also presented a mass and energy balance for a full-scale scenario of this innovative biorefinery platform.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Eliana C. Guarda, Eunice Costa, Catia Gil, Catarina L. Amorim, Claudia F. Galinha, Anouk F. Duque, Paula M. L. Castro, Maria A. M. Reis
Summary: Traditional tools for controlling and monitoring biological systems are often offline and time-consuming, leading to ineffective and delayed responses. This study evaluated the feasibility of using two-dimensional fluorescence spectroscopy as a real-time and non-destructive procedure to monitor acidogenic fermentation in a granular sludge reactor. The results showed that fluorescence spectroscopy combined with mathematical analysis could accurately predict fermentation products and soluble protein concentrations in the effluent.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Environmental Sciences
Chao Zhang, Rui Yang, Meichen Sun, Shicheng Zhang, Mingjing He, Daniel C. W. Tsang, Gang Luo
Summary: The study showed that biochar produced under different conditions could enhance the anaerobic digestion of food waste and the surface characteristics of biochar and changes in microbial communities were key factors affecting the enhancement.
Review
Biotechnology & Applied Microbiology
Corine Nzeteu, Fabiana Coelho, Emily Davis, Anna Trego, Vincent O'Flaherty
Summary: The research and development of sustainable resource management systems have been driven by the emerging climate and energy crises and the increasing waste generation. Organic materials, such as food waste and agricultural and animal residues, have the potential to be transformed into valuable products through various technologies, including anaerobic digestion. The valorization of these organic residues not only reduces the burden on waste management systems but also contributes to the development of a circular bioeconomy.
FERMENTATION-BASEL
(2022)
Article
Agricultural Engineering
Wang Yan, Yun Chen, Nan Shen, Guoxiang Wang, Junfeng Wan, Jinjin Huang
Summary: The study found that increasing the pH from 8 to 11 during anaerobic fermentation of Al waste activated sludge led to significantly higher production and release of volatile fatty acids (VFAs) and phosphorus (P).
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Serena Simonetti, Claudia Fernandez Martin, Davide Dionisi
Summary: This study aimed to maximize product concentration, yield, and productivity in anaerobic fermentation of biomass to produce short-chain organic acids. High substrate concentrations were found to increase product concentration, yield, and productivity, with the highest values obtained at pH 5.5. pH adjustments showed a positive correlation with increased product concentration, yield, and productivity.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Xiao Huang, Chongsen Duan, Jianghua Yu, Wenyi Dong, Hongjie Wang
Summary: This study found that temperature plays a crucial role in the succession and interspecific interaction of microorganisms in primary sludge anaerobic fermentation system, affecting the production of volatile fatty acids (VFAs). Higher temperatures promote the production of acetic and iso-valeric acid, and there are metabolic differences among microorganisms at different temperatures.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Engineering, Chemical
Swarnalatha Mailaram, Vivek Narisetty, Vivek V. Ranade, Vinod Kumar, Sunil K. Maity
Summary: This study presents a techno-economic feasibility study for microbial BDO production from brewers' spent grain, and suggests a feasible method both technically and economically. The application of pinch technology can reduce energy consumption and with the increase in BDO titer, the production cost is also reduced marginally.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Green & Sustainable Science & Technology
Huanjun Chen, Fen Liu, Qingfeng Wang, Xiang Zhen, Bo Wang, Shujia Wang, Jun Zhang, Lebin Su, Zhongming Wang, Shunni Zhu
Summary: In this study, co-fermentation of waste activated sludge (WAS) and black liquor (BL) was conducted for the production of volatile fatty acids (VFAs) along with phosphorus removal and lignin recovery. The optimal conditions for VFAs production and P removal were found to be pH 10 and the addition of 800 mg/L of Mg2+. The pH also affected the composition of VFAs.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Agricultural Engineering
Peng Yu, Weiming Tu, Menghan Wu, Zuotao Zhang, Hui Wang
Summary: A pilot-scale system producing volatile fatty acids from food waste under acidic conditions was established, with pH level of 6.5 resulting in the highest VFAs yield and increased proportion of butyric acid. Microbial analysis identified dominant bacteria that positively influence the acidification process. This study provides valuable insights for large-scale treatment of food waste.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Yuqi Zhou, Xiao Huang, Silan Ma, Jianghao He
Summary: The role of thermal-alkaline pretreatment temperatures (TAPT) in sludge fermentation and microbial characteristics was investigated. Increasing TAPT promoted the dissolution of soluble chemical oxygen demand (SCOD) and VFAs, but had minimal effect on NH4+-N and PO43--P release. The optimal condition was found to be 120°C, with the maximum release of SCOD at 8788.74 mg/L (2.63 times of the control group) and the maximum dissolution of VFAs at 4596 mg/L (about 1.28 times of the control group).
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Biotechnology & Applied Microbiology
Yong Jin, Ming Gao, Hongai Li, Yujia Lin, Qunhui Wang, Maobing Tu, Hongzhi Ma
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2019)
Article
Multidisciplinary Sciences
Yong Jin, Sonayu Huang, Qunhui Wang, Ming Gao, Hongzhi Ma
ROYAL SOCIETY OPEN SCIENCE
(2019)
Article
Chemistry, Physical
Yong Jin, Kasper D. de Leeuw, David P. B. T. B. Strik
Summary: This study presents the initial steps of a potential PHA recycling route by fermenting hydrolyzed PHA-based bioplastics into carboxylates acetate and butyrate. The alkaline pretreatment showed the highest hydrolysate yield. After filtration and mixed culture fermentation, acetate and butyrate were produced from the hydrolyzed PHA. The overall yields of the combined processes were calculated.
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)