Review
Biotechnology & Applied Microbiology
Julio Cesar de Carvalho, Denisse Tatiana Molina-Aulestia, Walter Jose Martinez-Burgos, Susan Grace Karp, Maria Clara Manzoki, Adriane Bianchi Pedroni Medeiros, Cristine Rodrigues, Thamarys Scapini, Luciana Porto de Souza Vandenberghe, Sabrina Vieira, Adenise Lorenci Woiciechowski, Vanete Thomaz Soccol, Carlos Ricardo Soccol
Summary: Recycling bioresources is the sustainable way to meet the growing food and energy needs of the world population. This review discusses the potential of using agro-industry wastewater to cultivate microalgae and highlights the benefits for both the microalgal industry and the agro-industry. The review also addresses the challenges involved in establishing stable and circular processes, as well as the composition and use of various agro-industry residues for microalgal production.
FERMENTATION-BASEL
(2022)
Article
Environmental Sciences
Naassom Wagner Sales Morais, Milena Maciel Holanda Coelho, Amanda de Sousa e Silva, Francisco Schiavon Souza Silva, Tasso Jorge Tavares Ferreira, Erlon Lopes Pereira, Andre Bezerra dos Santos
Summary: This study aimed to evaluate the methane production potential of six agro-industrial wastewaters and determine the most suitable kinetic models for simulating their methane production. The results showed that residual glycerol had the highest methanization potential, and exponential kinetic models were more efficient in describing methane production of more soluble substrates.
ENVIRONMENTAL POLLUTION
(2021)
Article
Green & Sustainable Science & Technology
Samson Nnaemeka Ugwu, Kevin Harding, Christopher Chintua Enweremadu
Summary: This study conducted a comparative assessment of the potential environmental impacts of biogas production from enhanced anaerobic digestion using different enhancement options for agro-industrial wastes. The results revealed that the combined enhancement option (co-digestion + PPy/Fe3O4 NPs) had the least global warming potential.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Chemical
Roberto Eloy Hernandez Regalado, Tobias Weide, Daniel Baumkoetter, Lukas Wettwer, Jurek Haener, Elmar Bruegging, Jens Traenckner
Summary: Anaerobic co-digestion is a commonly used technique for biogas production, but selecting the optimal substrate proportions in the mixtures is challenging. This study employed a mixture design to investigate interactions between different biomasses and used a modified Gompertz model to identify key parameters for methane production curves. The research successfully determined optimal mixture compositions and validated the suitability of the method for practical applications.
Article
Energy & Fuels
Rocio Auxiliadora Lopez, Miriam Tena, Rosario Solera, Montserrat Perez
Summary: This study aimed to energetically valorize sludge from wastewater treatment plants and discharges from the wine sector through anaerobic co-digestion. Two different processes, single-stage mesophilic anaerobic digestion and Temperature-Phased Anaerobic Digestion (TPAD), were employed for the valorization. Biodegradability tests were conducted to determine the methane production yield, and the results showed that the single-stage process was more effective in methane generation compared to the TPAD process.
Review
Agricultural Engineering
Suyun Xu, Zihao Qiao, Liwen Luo, Yongqi Sun, Jonathan Woon-Chung Wong, Xueyu Geng, Jing Ni
Summary: The advantages of anaerobic digestion (AD) technology in organic solid waste treatment for bioenergy recovery are globally recognized. Attention has shifted towards on-site biogas research and biogenic CO2 sequestration from AD plants to achieve "carbon neutral". Various CO2 bioconversion technologies within AD systems offer promising solutions for reducing greenhouse gas emissions and increasing renewable energy recovery.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Environmental
Khaliyah Sani, Prawit Kongjan, Charoen Pakhathirathien, Benjamas Cheirsilp, Sompong O-Thong, Marisa Raketh, Rusnee Kana, Rattana Jariyaboon
Summary: The study investigated the biohydrogen and biomethane potential of palm oil mill effluent (POME) in a two-stage anaerobic digestion system under thermophilic and mesophilic conditions. The results showed that the best production potentials were obtained from POME with an initial 0.5 g-COD loading, and the energy yield achieved from two-stage AD was significantly higher than single-stage AD. Continuous production of hydrogen and methane revealed that the highest yields were generated at specific hydraulic retention times, with an overall COD removal of approximately 66.27%.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Multidisciplinary Sciences
Rodrigo Sequeda Barros, Michel Duran Contreras, Felipe Romani Morris, Marley Vanegas Chamorro, Alberto Albis Arrieta
Summary: Waste management technologies now offer opportunities to generate value-added products. Anaerobic digestion has been identified as an effective method to produce biogas from organic wastes. This study evaluated the potential of methane production through anaerobic digestion of rumen and chicken manure, two common agroindustrial wastes from the Colombian Caribbean region. The results showed that thermophilic digestion produced more biogas, while mesophilic digestion had better biogas quality. The study also found that anaerobic digestion of rumen with added fat-oil-grease (FOG) under mesophilic conditions performed exceptionally well in terms of biogas quantity and quality.
Article
Green & Sustainable Science & Technology
Xiaoqian Zhang, Igor M. Lopes, Ji-Qin Ni, Yongping Yuan, Chi-Hua Huang, Douglas R. Smith, Indrajeet Chaubey, Shubiao Wu
Summary: This study investigated the performance of anaerobic digestion in converting animal and agro-industrial wastes into organic fertilizers over a long-term field conditions. The results showed significant variability in converting feedstock in the three digesters, with differences in pH, total solids, and ammonium nitrogen concentrations. The impact of anaerobic digestion on metal concentrations was mixed and insignificant due to large concentration variations.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Agricultural Engineering
M. Keerthana Devi, S. Manikandan, M. Oviyapriya, Manickam Selvaraj, Mohammed A. Assiri, Sundaram Vickram, R. Subbaiya, N. Karmegam, Balasubramani Ravindran, S. W. Chang, Mukesh Kumar Awasthi
Summary: This article introduces the methods and applications of biogas production from agricultural waste. The paper focuses on the pre-treatment, usage of waste, production methods, and application in biogas production, summarizing the latest advancements in this field. The economic, technical, and environmental properties of biogas production, as well as the factors influencing it and the future prospects, are emphasized in this review.
BIORESOURCE TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Efisio Antonio Scano, Massimiliano Grosso, Agata Pistis, Gianluca Carboni, Daniele Cocco
Summary: The study found that residual biomass can replace dedicated crops without reducing performance, with pilot plants showing higher biogas production rates. In the case of Sardinia, utilizing all available biomass residues can produce a significant amount of biomethane, meeting 20% of the island's natural gas demand.
Article
Environmental Sciences
Alireza Vosooghnia, Alessandra Polettini, Andreina Rossi, Ian Vazquez-Rowe, Giovanni Francini
Summary: The study aimed to assess the environmental profile of ultrasonication as a post-treatment of anaerobic digestion, showing potential benefits in enhancing the degradability of complex organic residues. Results suggest that upgrading biogas and bio-methane for vehicle fuel can reduce greenhouse gas emissions compared to energy generation alternatives.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Wanjiang Li, Teng Cai, Xueqin Lu, Yule Han, Dilibaierkezi Kudisi, Guohua Chang, Ke Dong, Guangyin Zhen
Summary: This study constructed a new recirculated two-phase anaerobic digestion system for renewable energy recovery from waste activated sludge. The results showed that the system achieved high yields of H2 and CH4 with efficient COD removal. The synergy of membrane separation and recirculation system promoted the growth of key microorganisms, enhancing the biodegradation of waste activated sludge. The system also significantly increased net energy output compared to the control system without recirculation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Shifare Berhe, Seyoum Leta
Summary: The study evaluated the anaerobic co-digestion of tannery wastewater (TWW) with dairy wastewater (DWW) using a two-phase anaerobic sequencing batch reactor (ASBR). The addition of DWW improved the process efficiency, with increased biogas production and methane yield compared to mono-digestion of TWW. The two-phase anaerobic digestion process exhibited stable performance and high chemical oxygen demand removal efficiency.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Milad Parchami, Clarisse Uwineza, Onyinyechi H. Ibeabuchi, Bengt-Ove Rustas, Mohammad J. Taherzadeh, Amir Mahboubi
Summary: This study aimed to investigate the bioconversion of agro-industrial residues into volatile fatty acids (VFAs) for ruminant feed supplementation. The highest VFAs concentration was achieved through the co-digestion of thin stillage and potato protein liquor at pH 10 (14.2 g/L), with a yield of 0.85 g CODVFAs/g VSadded. Using a semi-continuous immersed membrane bioreactor (iMBR) at an organic loading rate of 3.7 gVS/L.day, the highest VFAs concentration of 28.6 g/L (1.2 g CODVFAs/gVSadded) was obtained. Evaluation: 9.
Article
Agricultural Engineering
Sameh Samir Ali, Dimitris Zagklis, Michael Kornaros, Jianzhong Sun
Summary: This study found that supplementation of cobalt oxide nanoparticles (Co3O4-NPs) has a significant effect on anaerobic microbial population changes and anaerobic digestion (AD) performance and production. The addition of Co3O4-NPs at a concentration of 3 mg/L showed the maximum enhancement in biogas yield, increasing by 58.9% and 27.2% compared to the control and co-digestion processes, respectively. Additionally, methane (CH4) yield was enhanced by 89.96% and 43.4% over the control and co-digestion processes, respectively. The use of Co3O4-NPs also increased the viability of total bacterial cells by 9% as assessed by VIT(R) gene probe technology. Economic analysis showed that the highest net energy content of biogas was achieved with 3 mg/L Co3O4-NPs, resulting in a net profit of 67.66 USD/m3 of the substrate. Therefore, nanoparticle supplementation to the AD process is a promising approach to enhance biogas and CH4 production.
BIORESOURCE TECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
George Hotos, Despoina Avramidou, Savvas Giannis Mastropetros, Konstantina Tsigkou, Konstantina Kouvara, Pavlos Makridis, Michael Kornaros
Summary: In this study, nine halotolerant microorganisms were collected from lagoons in Western Greece, identified by morphological observations and DNA sequencing data. These microorganisms, including Chlorophyta, cyanobacteria, and dinoflagellate, showed potential for future exploitation, with high protein content and sufficient fatty acid accumulation. The pigments composition analysis indicated the dominance of chlorophyll b in some species and a high content of carotenoids in Amphidinium carterae. This study opens up opportunities for the valorization and recovery of valuable compounds from these newly discovered species.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Biotechnology & Applied Microbiology
Vasiliki P. Aravani, Konstantina Tsigkou, Vagelis G. Papadakis, Wen Wang, Michael Kornaros
Summary: This study assessed a continuous one-stage anaerobic digestion system for valorizing residual biomass in southern Greece during the spring/summer season. A mixture of 10% corn silage, 14% cattle manure, 66% watermelons unsuitable for human consumption, and 10% tomato processing residues was found to maximize methane yield. The system operated efficiently at high organic loading rates, providing a potential solution for residual biomass treatment.
BIOCHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Medicinal
Savvas Giannis Mastropetros, Konstantina Tsigkou, Yannis Cladas, Arun Kumar Priya, Michael Kornaros
Summary: Microalgal biomass has high concentrations of protein, carbohydrates, and lipids, which vary depending on the species and cultivation conditions. This study focused on a local isolate called Nephroselmis sp. and used a factorial experimental design to evaluate the accumulation of biomolecules, particularly fatty acids (FAs). The results showed that Nephroselmis sp. could be a potential source of eicosapentaenoic acid (EPA) for dietary supplements or biofuel production.
Article
Engineering, Chemical
Georgios Manthos, Dimitris Zagklis, Sameh S. Ali, Constantina Zafiri, Michael Kornaros
Summary: Biomass treatment for energy production has the potential to replace fossil fuels and alleviate environmental issues. This study examined three thermochemical processes (combustion, gasification, and pyrolysis) in terms of their theoretical yields, products, and economic viability. The analysis showed that gasification had the best sustainability results, with a gross income of EUR 0.13/kg and treatment cost of EUR 0.09/kg of biomass. The investment had an internal rate of return of 9%, making it a promising alternative for sustainable green energy production.
Review
Environmental Sciences
A. K. Priya, Muthiah Muruganandam, Sameh S. Ali, Michael Kornaros
Summary: Pollution from heavy metals is a significant global environmental concern caused by human activities such as mining, farming, and manufacturing. This pollution can harm crops, disrupt the food chain, and pose a threat to human health. Phytoremediation, a method that uses plants to remove heavy metals, is the most controllable and eco-friendly solution. However, the effectiveness of phytoremediation depends on the bioavailability of heavy metals in soil and the biomass of plants. This study examines different techniques and frameworks for heavy metal removal, emphasizing the challenges and limitations of phytoremediation and its potential application in addressing other harmful pollutants.
Article
Biotechnology & Applied Microbiology
Aikaterini Ioannis Vavouraki, Michael Kornaros
Summary: This study evaluates the composting effectiveness of vermicomposting anaerobic sludge and investigates the effects of different sludge compositions on compost properties. The results show that AS2 leads to higher N-P-K content compared to AS1.
FERMENTATION-BASEL
(2023)
Article
Chemistry, Medicinal
Vasilis Andriopoulos, Michael Kornaros
Summary: This study aims to identify key variables for the fatty acid profile of N. oculata microalgae. Through various data analysis methods, the effects of growth parameters and other factors on the fatty acid profile were discovered, and the negative effect of aeration on polyunsaturated fatty acids was revealed.
Article
Green & Sustainable Science & Technology
Georgios Manthos, Margarita Dareioti, Dimitris Zagklis, Michael Kornaros
Summary: This study aimed to mathematically model anaerobic digestion in batch systems to analyze the potential synergies between complementary substrates. The results showed that a mixture ratio of 70:30 for olive mill wastewater and liquid cow manure achieved a maximum net profit of 16 euro/m3reactor/d, ensuring the sustainability of the process.
Article
Green & Sustainable Science & Technology
Konstantina Tsigkou, Eirini Sventzouri, Constantina Zafiri, Michael Kornaros
Summary: This study valorized a mixture of fruits/vegetable waste-disposable nappies hydrolysate through anaerobic digestion, optimizing the digestate recirculation rate (RR) and evaluating the two-stage system's operation. It was found that RR0.25 significantly increased H2 production by 208%. Compared to RR0.25, using RR0.5 reduced the alkali solution requirements. However, the alkalinity content of the digestate greatly influenced the system's efficiency.
Article
Chemistry, Physical
Alexandra A. Ioannidi, Maria Vlachodimitropoulou, Zacharias Frontistis, Athanasia Petala, Eleni Koutra, Michael Kornaros, Dionissios Mantzavinos
Summary: This study examines the use of pristine Mo2C as a sodium persulfate (SPS) activator for the degradation of the drug losartan (LOS). The results show that acidic pH enhances LOS decomposition, and the apparent kinetic constant decreases with higher LOS concentrations. Sulfate radicals, hydroxyl radicals, and singlet oxygen are identified as the reactive species in LOS oxidation, with singlet oxygen being the predominant species. The addition of chloride accelerates the degradation rate, while bicarbonate and organic matter reduce the efficiency. The study also investigates the application of the Mo2C/SPS system for simultaneous LOS decomposition and elimination of Escherichia coli, with significant synergistic effects observed when simulated solar irradiation is present.
Review
Environmental Sciences
Manar K. K. Abd Elnabi, Nehal E. E. Elkaliny, Maha M. M. Elyazied, Shimaa H. H. Azab, Shawky A. A. Elkhalifa, Sohaila Elmasry, Moustafa S. S. Mouhamed, Ebrahim M. M. Shalamesh, Naira A. A. Alhorieny, Abeer E. E. Abd Elaty, Ibrahim M. M. Elgendy, Alaa E. E. Etman, Kholod E. E. Saad, Konstantina Tsigkou, Sameh S. S. Ali, Michael Kornaros, Yehia A. -G. Mahmoud
Summary: The accumulation of both natural and anthropogenic sources of metals in the ecosystem has led to increasing concerns over heavy metal (HM) pollution. Human exposure to HMs, such as mercury, arsenic, lead, chromium, and cadmium, has become a significant environmental and health issue. These HMs can cause acute or chronic poisoning through water, air, or food. Their bioaccumulation in the body leads to various toxic effects on organs and tissues, primarily through the production of reactive oxygen species, enzyme inactivation, and oxidative stress. Conventional techniques for HM removal are limited, especially when the HM concentration is low. Microbial bioremediation, utilizing organisms like fungi and bacteria, has emerged as a potential solution due to their superior biosorption and bioaccumulation capabilities. This review aims to provide insights into HM uptake, toxicity mechanisms, and the management of metal poisoning through the selection of microbial remediation technology.
Article
Biotechnology & Applied Microbiology
Georgios Manthos, Leila Abbaszadeh, Dimitris Zagklis, Michael Kornaros
Summary: In this study, a comprehensive mathematical model was developed to describe the nitrification process in mixed cultures involving isolated NOB and starved AOB, allowing for a more accurate representation of the biological dynamics during starvation conditions. The accuracy of the model was confirmed by testing its predictions against experimental data. This model provides insights into the intricate mechanisms underlying nitrification, contributing to the advancement of sustainable wastewater treatment practices.
FERMENTATION-BASEL
(2023)
Review
Green & Sustainable Science & Technology
Abdallah Abdelfattah, Sameh Samir Ali, Hassan Ramadan, Eslam Ibrahim El-Aswar, Reham Eltawab, Shih-Hsin Ho, Tamer Elsamahy, Shengnan Li, Mostafa M. El-Sheekh, Michael Schagerl, Michael Kornaros, Jianzhong Sun
Summary: The rapid expansion of the global economy and human population has led to a shortage of water resources suitable for direct human consumption, making water remediation a global priority. Microalgae cultivation in various types of wastewaters has shown promise in removing contaminants from industrial and urban effluents. Microalgae-based wastewater treatment has gained attention for its low energy requirements, ability to thrive in diverse environmental conditions, and potential to transform wastewater nutrients into valuable compounds. This review highlights the application of microalgae in wastewater remediation, including the removal of various pollutants and the potential for resource recovery through different mechanisms.
ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY
(2023)
Article
Biotechnology & Applied Microbiology
Vasiliki P. Aravani, Konstantina Tsigkou, Vagelis G. Papadakis, Wen Wang, Michael Kornaros
Summary: In Greece, the improper disposal of biomass leads to significant environmental impacts. This study focuses on the assessment of anaerobic co-digestion of biomass mixtures in Northern and Southern Greece. The results suggest that different mixtures are suitable for methane yield maximization in these two regions. However, the accumulation of volatile fatty acids and inhibitors poses challenges to the operation of the reactors. Further research is recommended to optimize the use of biomass mixtures.
FERMENTATION-BASEL
(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)
