Article
Green & Sustainable Science & Technology
Chinmay Deheri, Saroj Kumar Acharya
Summary: Anaerobic co-digestion of food waste, cow dung, and sludge solution was experimentally evaluated for hydrogen and methane production with the addition of calcium peroxide (CaO2) and sodium hydroxide (NaOH). The study found that using NaOH increased biogas generation by 17% and methane concentration by 10%, while the addition of CaO2 improved hydrogen concentration by 7% and cumulative hydrogen yield by 37%. The production of hydrogen was significantly enhanced by CaO2, while methane generation was influenced by NaOH.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Tingting Hou, Jiamin Zhao, Zhongfang Lei, Kazuya Shimizu, Zhenya Zhang
Summary: This study found that supplementation of N-2 and Air-nanobubble water can significantly enhance the efficiency of hydrogen and methane production in the two-stage anaerobic digestion of food waste. Air-NBW has a promoting effect on both hydrogen and methane production stages, while N-2-NBW only has a positive impact on the hydrogen production stage.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Energy & Fuels
Debnath Ovi, Soon Woong Chang, Jonathan W. C. Wong, Davidraj Johnravindar, Sunita Varjani, jae Hoon Jeung, Woo jin Chung, Anand Thirupathi, Balasubramani Ravindran
Summary: This study found that the addition of an appropriate amount of rice husk biochar (RHB550) can improve the anaerobic digestion process of food waste and increase methane production. However, excessive amounts of biochar can inhibit the digestion process. Adding RHB550 biochar can enhance the stability and methane yield. Increasing its concentration can further improve the organic loading rate in anaerobic digestion.
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
Environmental Sciences
Carlos Morales-Polo, Maria del Mar Cledera-Castro, Marta Revuelta-Aramburu, Katia Hueso-Kortekaas
Summary: The objective of this study was to assess the effects of mixing different fractions of organic waste (fruit and vegetable, meat, and fish) during anaerobic digestion. Batch experiments compared the digestion of each fraction individually to mixed fractions, focusing on gas generation and process performance using H2 as an indicator. Results showed that the optimal mixture was an equal proportion of all fractions, resulting in a balanced composition, a 58% faster process, and a 12% increase in methane production. It was also found that mixtures increased hydrolysis speed, with meat fraction mixtures increasing hydrolysis rate by 148% and buffering acidification inhibition.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Microbiology
Sato Hasaka, Saki Sakamoto, Katsuhiko Fujii
Summary: This study examined the adaptability of seed microorganisms in producing biogas from food processing wastes. The results demonstrated that the heterogeneity of bacterial members in the seed microflora facilitated quick adaptation to various types of food processing wastes and the hydrolysis of carbohydrates and proteins using specific enzymes. Compared to animal-derived wastes, wastes from plants, fruits, and crops were more suitable for hydrogen production.
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
Engineering, Environmental
Endashaw Workie, Vinor Kumar, Amit Bhatnagar, Yiliang He, Yanjun Dai, Yen Wah Tong, Yinghong Peng, Jingxin Zhang, Cunbin Fu
Summary: With the increasing global food waste, the potential for bioenergy production is being explored. This paper reviews the research progress, gaps, and prospects in the process of methane production from food waste. Anaerobic digestion has shown high efficiency in converting food waste to methane. The review also highlights the importance of evaluating weather variations and microphysical properties of the food waste for efficient valorization.
Article
Thermodynamics
Jaewon Byun, Jeehoon Han
Summary: The increasing generation of food waste presents a major challenge to sustainable development, with the production of green methane being proposed as a promising solution. This study successfully developed a large-scale process for producing green methane from food waste and evaluated its economic feasibility by considering economic parameters.
Article
Green & Sustainable Science & Technology
Tugui Yuan, Ran Sun, Mingshuai Shao, Qiyong Xu
Summary: The combination of sludge load control and iron oxide addition strategies has a significant influence on food waste anaerobic digestion. Low sludge loads or iron oxide addition can enhance digestion performance. Low sludge loads promoted substrate hydrolysis and volatile fatty acids degradation, while iron oxide addition increased the methane yield and maximum methane production rate by promoting hydrolysis and interspecies electron transfer among microbes. However, excessive iron oxide dosage may limit the economic benefits. Overall, simultaneous control of sludge load and iron oxide addition can optimize the anaerobic digestion performance.
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.
Article
Engineering, Environmental
Mingting Du, Xuran Liu, Dongbo Wang, Qi Yang, Abing Duan, Hong Chen, Yiwen Liu, Qilin Wang, Bing-Jie Ni
Summary: This study delves into the degradation of capsaicin in anaerobic co-digestion, revealing that capsaicin inhibits methane production and affects the activity of anaerobic microbes, particularly impacting hydrolysis, acidogenesis, and methanogenesis.
Article
Thermodynamics
Liangchen Yue, Jun Cheng, Suqin Tang, Xiaoxia An, Junjie Hua, Haiquan Dong, Junhu Zhou
Summary: Pretreating lipid waste with ultrasound showed higher soluble COD and methane production, as well as higher energy conversion efficiency compared to microwave heating. Analysis revealed that ultrasound pretreatment could reduce residual lipids and alleviate microorganism coating.
Article
Green & Sustainable Science & Technology
Tingting Hou, Jiamin Zhao, Zhongfang Lei, Kazuya Shimizu, Zhenya Zhang
Summary: The study investigated the effects of high salinity on the co-production of hydrogen and methane from two-stage AD of food waste, with the addition of Air-NBW found to increase hydrogen and methane yields. The results suggest that improvement in microbial electron transfer and enzymatic activities in each stage through Air-NBW addition could provide an efficient approach for hydrogen and methane recovery under high salinity conditions.
JOURNAL OF CLEANER PRODUCTION
(2021)
Review
Environmental Sciences
Archana Paranjpe, Seema Saxena, Pankaj Jain
Summary: Anaerobic co-digestion is an important technology for processing organic waste, recovering nutrients, and creating sustainable biofuel. However, the low biogas output and high installation costs limit its viability. This literature review demonstrates that anaerobic co-digestion produces more methane biogas than anaerobic digestion, and adjusting the waste-to-water waste ratio can increase methane production.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
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)