Article
Environmental Sciences
Yiwei Liu, Xiang Li, Shaohua Wu, Zhao Tan, Chunping Yang
Summary: The addition of conductive materials for direct interspecies electron transfer (DIET) in anaerobic digestion can improve efficiency. This paper reviews the effects of DIET on COD removal, VFA consumption and methane production, discusses the increase of conductive microorganisms, and describes the impact on microbial activities and sludge properties. Future research needs include understanding DIET roles in each step, metabolism mechanisms in DIET systems, and inhibition of excessive conductive materials dosage.
Review
Agricultural Engineering
Amith Abraham, Hyojung Park, Okkyoung Choi, Byoung-In Sang
Summary: The world of bioplastics has rapidly expanded, generating new waste streams that pose challenges to waste processing; anaerobic co-digestion is considered the best option for efficient bioplastic waste processing with reduced space requirements and environmental pollution; the higher C/N ratio of bioplastics presents a challenge to anaerobic digestion, but co-digestion with lower C/N ratio biowastes can improve biogas production.
BIORESOURCE TECHNOLOGY
(2021)
Article
Energy & Fuels
C. N. Kowthaman, V. Arul Mozhi Selvan, P. Senthil Kumar
Summary: This study evaluates lipid extraction from algae and biogas production using thermo-chemical pretreatment, finding hexane as a suitable solvent with a 1.8% yield. Sodium hydroxide was found to be the most influential on biogas yield, with a predicted maximum yield of 740 ml/gVS under optimal conditions. Pretreated algae and corn husk produced 60% higher biogas yield than untreated algae, showing potential for mass application.
Article
Energy & Fuels
Diana Dominguillo-Ramirez, Jorge Aburto, Hector Hugo Leon-Santiesteban, Elias Martinez-Hernandez
Summary: In this study, an artificial neural network (ANN) model was developed to predict methane yield using a collected dataset of 340 experimental data. The model's input parameters were biomass composition in terms of total solids (TS), volatile solids (VS), lipids, protein, and lignin. The results showed that the ANN-based model had a superior predictive power compared to conventional multiple regression models, with lower RMSE values and lower prediction errors in most cases. Therefore, the model is useful for preliminary stages of process design and evaluation of AD-based bioenergy projects.
Review
Agricultural Engineering
Apurva Mishra, Manish Kumar, Nanthi S. Bolan, Atya Kapley, Rakesh Kumar, Lal Singh
Summary: The interest in biogas generation from biowaste via anaerobic digestion has led to advancements in production processes and upgradation technologies. Removing impurities like H2S and CO2 from biogas stream enhances its efficiency as a renewable energy source. Success in biogas production and upgradation depends on factors like feedstocks, microbial diversity, and purification methods.
BIORESOURCE TECHNOLOGY
(2021)
Review
Chemistry, Physical
Leonor Sillero, William Gustavo Sganzerla, Tania Forster-Carneiro, Rosario Solera, Montserrat Perez
Summary: This bibliometric review evaluated the research progress on hydrogen production from dark fermentation and found that the number of publications in this field has exponentially increased over the past 21 years. The studies mainly focused on operational parameters, process optimization, pretreatment, and microbial community to improve the efficiency of hydrogen production from dark fermentation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Agricultural Engineering
Huijuan Sun, Xinya Yang, Lei Zhang, Yang Liu
Summary: This study investigated the effect of protein content on calcium phosphate precipitation and methane production in anaerobic digestion. Results showed that the degradation of amino acids led to pH increase and triggered the precipitation of calcium phosphate. Addition of 25% bovine serum albumin to the wastewater created a favorable microbial community, resulting in a methane production rate of 82.7%. The prevalence of Synergistetes and Methanosaeta indicated that methane was mainly produced through acetate utilization.
BIOMASS & BIOENERGY
(2023)
Review
Environmental Sciences
Ranarup Kundu, Bella Kunnoth, Sridhar Pilli, Venkateswara Rao Polisetty, R. D. Tyagi
Summary: In recent years, anaerobic digestion (AD) has become popular for generating clean energy and managing organic waste. The accumulation of ammonia, acids, and nutrients in the reactor compromises its effectiveness. Biochar (BC) has gained interest in biogas production due to its adaptability. Adding BC to the AD process can mitigate toxic inhibition, reduce methanogenic lag phase, immobilize functional bacteria, and enhance electron transfer. However, more comprehensive knowledge is needed regarding the multifaceted function of BC and its mechanisms in biogas generation in AD.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agricultural Engineering
Mirko Cucina, Daniela Pezzolla, Chiara Tacconi, Giovanni Gigliotti
Summary: This study aimed to investigate anaerobic co-digestion of lignocellulosic residues and the role of soluble organic matter, showing that co-digestion can increase biomethane yields with a positive correlation to soluble organic matter. Fruit wastes and brewery trub positively affected anaerobic digestion of lignocellulosic residues, but fruit waste co-digestion may lead to early acidification.
BIOMASS & BIOENERGY
(2021)
Article
Environmental Sciences
Binoy Kumar Show, Gaayathri Shivakumaran, Apurba Koley, Anudeb Ghosh, Shibani Chaudhury, Amit Kumar Hazra, S. Balachandran
Summary: This study utilized thermal and chemical pretreatment techniques to enhance biogas production from water hyacinth used as a substrate. Results showed that alkali pretreatment can improve degradability and biogas production of water hyacinth.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Green & Sustainable Science & Technology
Di Wu, Lei Li, Yun Peng, Pingjin Yang, Xuya Peng, Yongming Sun, Xiaoming Wang
Summary: Anaerobic reactors in full-scale biogas plants often face process instability issues, and selecting and quantifying suitable state indicators is crucial for ensuring process stability. Most proposed state indicators mainly focus on gas and liquid phases, and combining different state indicators to provide complementary information is essential for comprehensive process status interpretation.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2021)
Review
Agricultural Engineering
Hang P. Vu, Luong N. Nguyen, Qilin Wang, Hao H. Ngo, Qiang Liu, Xiaolei Zhang, Long D. Nghiem
Summary: This review discusses technologies to remove hydrogen sulphide (H2S) during anaerobic digestion (AD). Post-treatment technologies have high removal efficiency but do not mitigate H2S toxicity. Input control reduces sulphur input but has lower removal efficiency. Microaeration for regulating the redox potential is a promising alternative with high removal efficiency and low operational cost.
BIORESOURCE TECHNOLOGY
(2022)
Review
Green & Sustainable Science & Technology
Yujie Han, Xiao Chang, Hai Xiang, Yi Fang, Lizhuang Hao, Yue Gu, Xinyu Han, Bao Zhao, Zijiao Zhao, Chengzhen Zhao, Rongzhen Zhong
Summary: This research focuses on the complexities and mechanisms of rumen digestive systems in anaerobic digestion processes using lignocellulosic biomass. Through meta-omics techniques, the structure and function of rumen microbial communities are analyzed, revealing their fermentation dynamics and interactions with the host and other microbes. These findings contribute to the development of innovative bio-inspired processes and provide a promising trajectory for future AD systems.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2023)
Article
Agricultural Engineering
Sijie Huang, Mengmeng Shen, Zhiyong Jason Ren, Houkai Wu, Hao Yang, Buchun Si, Jianhan Lin, Zhidan Liu
Summary: The study developed two upflow air-cathode chamber microbial fuel cells for in situ monitoring of biohydrogen and biomethane reactors. Through Illumina MiSeq sequencing and principal component analysis, it was found that the microbial communities in UMFCs showed a high level of stability with distinct shifts in community structure, emphasizing the importance of hydrogenotrophic methanogens in methane production.
BIORESOURCE TECHNOLOGY
(2021)
Article
Green & Sustainable Science & Technology
Sanjeev Kumar Awasthi, Manish Kumar, Surendra Sarsaiya, Vivek Ahluwalia, Hongyu Chen, Guneet Kaur, Ranjna Sirohi, Raveendran Sindhu, Parameswaran Binod, Ashok Pandey, Rashmi Rathour, Sunil Kumar, Lal Singh, Zengqiang Zhang, Mohammad J. Taherzadeh, Mukesh Kumar Awasthi
Summary: This review discusses the technologies, current situation, opportunities, challenges, and future research prospects of livestock manure management and resource recovery, as well as global regulations and policies. Although several bioenergy generation and nutrient recovery technologies have been widely discussed, issues such as high establishment costs, operational costs, manure assortment, and digestate handling still exist. In the context of economic and environmental sustainability, further research is needed to establish an efficient manure management framework that achieves minimal environmental impact and maximizes economic gain.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Agricultural Engineering
Renisha Karki, Wachiranon Chuenchart, K. C. Surendra, Shihwu Sung, Lutgarde Raskin, Samir Kumar Khanal
Summary: Anaerobic mono- and co-digestion of coffee pulp, cattle manure, food waste, and dewatered sewage sludge were evaluated using biochemical methane potential tests. Mono-digestion of coffee pulp and food waste yielded higher methane yields compared to the co-digestion ratios examined, with no synergistic or antagonistic effects observed. Nine different kinetic models were compared, with cone and modified Gompertz models identified as best-fit for mono- and co-digestion of coffee pulp and cattle manure, and superimposed model for food waste and dewatered sewage sludge.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Muhammad Ahmar Siddiqui, Basanta Kumar Biswal, Philippe M. Heynderickx, Jeonghwan Kim, Samir Kumar Khanal, Guanghao Chen, Di Wu
Summary: This study investigated the application of an anaerobic dynamic membrane bioreactor coupled with sulfate reduction (SrDMBR) for high-salinity and high-sulfate wastewater treatment. The results showed that dynamic membrane could rapidly form after each backwashing cycle, achieving high organic removal and sulfate reduction rates. Additionally, it was found that the microbial communities enriched in the sludge were different from those on the dynamic layer.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Mingjing He, Xiefei Zhu, Shanta Dutta, Samir Kumar Khanal, Keat Teong Lee, Ondrej Masek, Daniel C. W. Tsang
Summary: Hydrothermal carbonization (HTC) is a promising alternative for valorizing food waste digestate (FWD) and avoiding disposal issues. Co-HTC of FWD with wet lignocellulosic biomass, such as wet yard waste (YW), and 0.5 M HCl shows superior attributes in terms of energy recovery and nutrient recovery from process water. However, attention should be paid to the carbon loss issue during the process.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Ianny Andrade Cruz, Wachiranon Chuenchart, Fei Long, K. C. Surendra, Larissa Renata Santos Andrade, Muhammad Bilal, Hong Liu, Renan Tavares Figueiredo, Samir Kumar Khanal, Luiz Fernando Romanholo Ferreira
Summary: This review critically examines the application of machine learning in the anaerobic digestion process, focusing on evaluating important algorithms and their applications in AD modeling, and outlining the challenges faced by ML in this context.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agronomy
Yiping Guo, Xiangkai Tao, Weiyong Zhu, Yapeng Ji, K. C. Surendra, Samir Kumar Khanal, Bingtao Liu, Guoting Li
Summary: Biochar is commonly used as a material to improve soil properties, but its application conditions can influence the adsorption of heavy metal copper. This study found that a specific combination of biochar, wheat straw, and cow manure compost could greatly enhance the adsorption rate of copper in soil. The adsorption processes were identified as multiphase diffusion processes, and the interactions between copper and soil were mainly monolayer adsorption with other complex reactions. However, in leaching experiments, the addition of wheat straw and compost led to more copper being dissolved in the leaching water.
COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
(2023)
Review
Agricultural Engineering
Akashdeep Singh Oberoi, K. C. Surendra, Di Wu, Hui Lu, Jonathan W. C. Wong, Samir Kumar Khanal
Summary: This review critically examines the behavior and removal of pharmaceuticals in anaerobic membrane bioreactors (AnMBR), focusing on removal efficiencies, mechanisms, influencing factors, and microbial community structures. The inhibitory effects of pharmaceuticals on AnMBR performance and membrane fouling are discussed, and the importance of membrane biofouling layer and its components in pharmaceuticals removal is highlighted. Recent advancements in AnMBR configurations for membrane fouling control and enhanced pharmaceuticals removal are also systematically discussed.
BIORESOURCE TECHNOLOGY
(2022)
Review
Agricultural Engineering
Muzammil Khan, Wachiranon Chuenchart, K. C. Surendra, Samir Kumar Khanal
Summary: Anaerobic co-digestion (AcoD) offers various advantages in terms of better digestibility, process stability, and increased methane yield. However, the efficient operation of an AcoD system requires a comprehensive understanding of important operational parameters and monitoring processes can be tedious. Artificial intelligence (AI) has emerged as an innovative approach to optimize and control the AcoD process. This review discusses the applications of AI in AcoD process optimization, control, prediction, and real-time monitoring, as well as the comparison of different AI algorithms.
BIORESOURCE TECHNOLOGY
(2023)
Review
Environmental Sciences
Kyle Rafael Marcelino, Li Ling, Sumeth Wongkiew, Hua Thai Nhan, K. C. Surendra, Ty Shitanaka, Hui Lu, Samir Kumar Khanal
Summary: There has been increasing interest in nanobubble technology due to its unique physicochemical properties, which have potential applications in environmental engineering and agriculture. The use of nanobubbles can inactivate pathogens in water treatment, remove harmful microorganisms on food, and remove pollutants from wastewater. Nanobubbles also have the potential to increase the dissolved oxygen level and plant yields. However, the fundamental mechanisms and mass transfer performance of nanobubble technology are not well understood.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Environmental
Mingde Ji, Jie Wang, Samir Kumar Khanal, Saqi Wang, Jian Zhang, Shuang Liang, Huijun Xie, Haiming Wu, Zhen Hu
Summary: In this study, a high-rate activated sludge-two-stage vertical up-flow constructed wetland (HRAS-TVUCW) system was developed to reduce carbon emissions during municipal wastewater treatment. The carbon emissions of the HRAS-TVUCW system were 4.1-fold lower than that of the conventional anaerobic/anoxic/aerobic (A2O) process, while the recovered energy from the HRAS-TVUCW system increased its contribution to carbon neutrality by 4.6-fold. Functional microbial community analysis showed that the controlled dissolved oxygen allocation in the HRAS-TVUCW system led to distinct microbial communities in each unit, facilitating denitrification efficiency increase and carbon emissions reduction. Overall, the HRAS-TVUCW system can be considered as a cost-effective and sustainable low-carbon technology for municipal wastewater treatment.
Editorial Material
Energy & Fuels
Ayon Tarafdar, Sunita Varjani, Samir Khanal, Siming You, Ashok Pandey
BIOENERGY RESEARCH
(2023)
Editorial Material
Agricultural Engineering
Samir Kumar Khanal, Ayon Tarafdar, Siming You
Summary: In recent years, there has been significant attention towards the digital transformation of bioprocesses, focusing on interconnectivity, online monitoring, process automation, AI and ML, and real-time data acquisition. AI can analyze and forecast high-dimensional data from bioprocess dynamics, allowing for precise control and synchronization to improve performance and efficiency. Data-driven bioprocessing is a promising technology for addressing challenges in bioprocesses. The MLSB-2022 special issue incorporates recent advances in ML and AI applications in bioprocesses, providing valuable resources for researchers to learn major developments.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
Xuezhi Wang, Zhongfang Lei, Zhenya Zhang, Kazuya Shimizu, Duu-Jong Lee, Samir Kumar Khanal
Summary: In this study, the use of nanobubble water (NBW) as a bio-augmentation agent in high-solids anaerobic digestion (AD) of corn straw was investigated. The results showed that NBW bio-augmentation significantly increased methane production and achieved a net energy gain and energy recovery, providing a sustainable management solution for renewable energy production from agricultural wastes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Zhuoying Wu, Duc Nguyen, Shilva Shrestha, Lutgarde Raskin, Samir Kumar Khanal, Po-Heng Lee
Summary: We introduced a concept called "nanaerobic digestion", which refers to the enhanced methane production in animal rumen and engineered digesters that is associated with the co-occurrence of methanogens and nanaerobes in a unique ecological niche with very low levels of dissolved oxygen. We analyzed meta-omic datasets and found that animal rumen shares similarities with oxygenated digesters, suggesting that trace levels of oxygen play a role in efficient digestion in ruminants. Prevotellaceae, a bacterial family abundant in rumen, contains many nanaerobes that contribute to efficient methane generation by performing nanaerobic respiration using cytochrome bd oxidase.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Sumeth Wongkiew, Chongrak Polprasert, Pongsak (Lek) Noophan, Thammarat Koottatep, Vorapot Kanokkantapong, K. C. Surendra, Samir Kumar Khanal
Summary: Food waste can be combined with bioponics to enhance nutrient availability. Adding vermicompost leachate (VCL) improves the co-composting of organic waste and the biodegradation of organic compounds. This study demonstrates that food waste provides nitrogen and phosphorus for lettuce growth, and VCL addition increases nutrient levels in bioponics.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Engineering, Environmental
Sining Zhou, Kyle Rafael Marcelino, Sumeth Wongkiew, Lianpeng Sun, Wuzhen Guo, Samir Kumar Khanal, Hui Lu
Summary: This review provides a systematic discussion on the fundamentals, applications, and challenges of microbubbles and nanobubbles technology.
ACS ES&T ENGINEERING
(2022)
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)
