Article
Energy & Fuels
Jingmiao Zhang, Shuai Wu, Ao Xia, Dong Feng, Yun Huang, Xianqing Zhu, Xun Zhu, Qiang Liao
Summary: Anaerobic digestion (AD) technology is an effective method for biogas production and livestock waste treatment. This study investigated the impact of oxytetracycline (OTC) on the AD process and found that OTC significantly inhibited methane production, with methane yields decreasing by 58.6% and 73.3% in mesophilic and thermophilic ADs respectively at an initial OTC concentration of 400 mg/L. OTC can be degraded by the AD process with a removal efficiency above 90% at lower concentrations. Higher OTC concentrations resulted in lower bio-methane yield, energy conversion efficiency, and contaminant removal in both mesophilic and thermophilic ADs.
Article
Green & Sustainable Science & Technology
Thuane Mendes Anacleto, Helena Rodrigues Oliveira, Vinicius Lacerda Diniz, Vinicius Peruzzi de Oliveira, Fernanda Abreu, Alex Enrich-Prast
Summary: Anaerobic digestion is a versatile manure management approach that plays a central role in circular economy. Different manure types and pretreatment methods have varying effects on methane yield, and the application of appropriate pretreatment can increase energy potential and substitute fossil fuels.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Agricultural Engineering
Moniba Mushtaq, Muhammad Zeshan, Muhammad Zeeshan, Ismat Nawaz, Muneeb Hassan
Summary: Cattle manure contaminated with the veterinary antibiotic oxytetracycline (OTC) can negatively impact the anaerobic digestion process, reducing biogas yield and volatile solids removal. This study used two different kinetic models to validate the biogas data, with the modified Gompertz model showing the best fit to the experimental data.
BIORESOURCE TECHNOLOGY
(2022)
Article
Green & Sustainable Science & Technology
Zijing Fan, Mei Zhang, Xiaxia Chen, Zhongda Hu, Qihang Shu, Chaosen Jing, Xingzhang Luo
Summary: The study found that a low dose of oxytetracycline (0.1 mg/L) had no inhibitory effect on the thermophilic anaerobic digestion of swine manure, while moderate and high doses (0.5 mg/L and 1.0 mg/L) inhibited methane production. Oxytetracycline can lead to temporary accumulation of volatile fatty acids, but does not significantly increase VFA accumulation.
Article
Agricultural Engineering
Xu Zhang, Yu Li, Kunxue Cui, Xinlin Zhang, Yiwen Sun, Zimin Wei
Summary: This study investigated the interaction among dissolved organic matter (DOM) components, environmental factors, and oxytetracycline (OTC) tolerant bacteria during chicken manure composting. The results showed that OTC residues in chicken manure can affect the transformation of DOM components during composting. This transformation is indirectly influenced by the OTC stress on the microbial community activity. The presence of OTC tolerant bacteria after the high temperature period of composting is positively correlated with the humification process.
BIORESOURCE TECHNOLOGY
(2023)
Article
Energy & Fuels
Neng Tao, Meicai Xu, Xiu Wu, Zilei Pi, Chaohua Yu, Di Fang, Lixiang Zhou
Summary: The addition of Schwertmannite significantly improved methane production from swine manure loaded with Cu, Zn, and As, by stimulating the enrichment of methanogenic bacteria and increasing the content of extracellular polymeric substances to enhance substrate degradation and microbial aggregates formation.
Article
Environmental Sciences
Changmin Lee, Munsol Ju, Jongkeun Lee, Seunghwan Kim, Jae Young Kim
Summary: This study aimed to investigate the chronic effects and recovery from inhibition in the anaerobic digestion of swine manure containing chlortetracycline. Two reactors were operated for 900 days, with one reactor spiked with CTC. Methane generation and organic removal did not recover within 300 days after CTC exposure was stopped, due to reduced bacterial diversity and shift in microbial species under long-term antibiotic pressure. Continuous exposure to CTC should be avoided for sustainable management of AD plants treating swine manure.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agricultural Engineering
Gabriele Kuhn Dupont, Morgana Maciel Oliveira, Naiara Jacita Clerici, Carolina Grings Serafini, Daniel Joner Daroit, Bruno Munchen Wenzel
Summary: Anaerobic co-digestion is a promising biotechnological approach for waste management and renewable energy production. This study investigated methane production during batch co-digestion of swine manure and cassava bagasse. The highest methane yield was observed with a specific combination of total solids and cassava bagasse. However, methane production was inhibited at higher cassava bagasse additions. A novel proposed model explained the acid inhibition phenomenon and can be applied to similar systems for rational scale-up.
BIOMASS & BIOENERGY
(2023)
Article
Green & Sustainable Science & Technology
Fang Hu, Haiqi Zhai, Yinan Yang, Yongkang Tian, Jingting Wang, Hong Qiang
Summary: In this study of anaerobic digestion of chicken manure with varying chlorotetracycline concentrations, it was found that extracellular polymeric substances (EPS) play a protective role against chlorotetracycline by forming complexes to decrease degradation and increase adsorption. However, there is also a potential risk to the soil ecosystem from the adsorbed chlorotetracycline on EPS in sludge.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Jing Li, Lu Yang, Zhonghua Wu
Summary: The study showed that high concentrations of CTC and OTC have negative effects on the growth and metabolism process of Vallisneria natans under experimental conditions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Green & Sustainable Science & Technology
Henrik B. Moller, Peter Sorensen, Jorgen E. Olesen, Soren O. Petersen, Tavs Nyord, Sven G. Sommer
Summary: Anaerobic digestion can reduce greenhouse gas emissions from livestock manure and produce biogas as a substitute for fossil energy. Different scenarios show reductions in GHG emissions ranging from 65 to 105 kg CO2-eq ton(-1) biomass.
Article
Energy & Fuels
Dulatbay Yerassyl, Yu Jin, Sugirbaeva Zhanar, Kazambayeva Aigul, Yessengaliyeva Saltanat
Summary: Kazakhstan has abundant reserves of natural resources and aims to reduce its dependency on coal, oil, and natural gas by developing renewable sources of energy, particularly renewable natural gas, to achieve net zero carbon emissions by 2050. A study analyzes the potential of biogas production using livestock and poultry manure as a source of organic matter, and suggests a policy based on agricultural land distribution to promote biogas production.
Article
Environmental Sciences
Yao Wang, Zhiqiang Chen, Qinxue Wen, Ye Ji
Summary: The research shows that composting can effectively reduce the abundance of heavy metal and antibiotic resistance genes in the environment. The initial chlortetracycline concentrations affect the variation of heavy metal speciation and potential horizontal gene transfer of HMRGs and ARGs in manure composting.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Biotechnology & Applied Microbiology
Jiaxing Zhang, Chuanren Qi, Yaya Wang, Yangyang Li, Tingting Han, Xiaoyan Gong, Mingwei Shan, Guoxue Li, Wenhai Luo
Summary: This study investigated the use of sorghum vinegar residue to enhance methane production from livestock manures during solid-state anaerobic digestion. The results showed that co-digestion of vinegar residue effectively diluted inhibitory substances, improved digester stability, and increased methane production. Cattle manure exhibited the highest increase, possibly due to synergistic effects with vinegar residue.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Chemistry, Multidisciplinary
Dilbag Singh, Kamla Malik, Meena Sindhu, Nisha Kumari, Vijaya Rani, Shikha Mehta, Karmal Malik, Poonam Ranga, Kashish Sharma, Neeru Dhull, Shweta Malik, Nisha Arya
Summary: This study found that using synthesized IONPs as a reducing, capping, and stabilizing agent can increase the production of biogas and methane from cattle manure during anaerobic digestion. The IONPs also had an impact on the chemical composition of the AD products.
Article
Engineering, Environmental
Matteo Papa, Lidia Paredes, Donatella Feretti, Gaia Viola, Giovanna Mazzoleni, Nathalie Steimberg, Roberta Pedrazzani, Juan Lema, Francisco Omil, Marta Carballa
Summary: The study showed that granular activated carbon and sand biofilters could effectively reduce the toxicity associated with organic micropollutants in wastewater effluents, especially in significantly reducing estrogenic load. However, the UV irradiation system was ineffective in reducing estrogenicity and exhibited slight mutagenicity in the effluent.
ENVIRONMENTAL ENGINEERING RESEARCH
(2021)
Article
Biotechnology & Applied Microbiology
Alberte Regueira, Julius L. Rombouts, S. Aljoscha Wahl, Miguel Mauricio-Iglesias, Juan M. Lema, Robbert Kleerebezem
Summary: This study proposed a metabolic model considering resource allocation and limitation, simulating the impact of glucose fermentation on microorganisms, and found that lactate production can be beneficial under specific conditions, providing a competitive advantage.
BIOTECHNOLOGY AND BIOENGINEERING
(2021)
Review
Biotechnology & Applied Microbiology
Nuria Fernandez-Gonzalez, G. H. R. Braz, L. Regueiro, J. M. Lema, M. Carballa
Summary: Microbial invasions are crucial for developing better management strategies in anaerobic digesters. Understanding pathogen invasions can enhance microbial safety in anaerobic digestion. Successful invasions by activated sludge organisms in anaerobic digesters are limited, with most feed organisms being inactive residual populations, indicating a need to expand studies on a wider range of invaders and operational scenarios.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2021)
Article
Agricultural Engineering
R. Bevilacqua, A. Regueira, M. Mauricio-Iglesias, J. M. Lema, M. Carballa
Summary: This study found that pH adjustment can influence the production of volatile fatty acids during mixed-culture fermentation of proteins. The conversion of proteins into VFAs is affected by pH, energetic yields, and the molecular configuration of amino acids.
BIORESOURCE TECHNOLOGY
(2021)
Review
Agricultural Engineering
David M. Kennes-Veiga, Lorena Gonzalez-Gil, Marta Carballa, Juan M. Lema
Summary: This review focuses on the metabolic activities, mechanisms, and enzymatic activities involved in the biotransformation of organic micropollutants in wastewater treatment plants under different redox environments. Common methodologies for studying such enzymes, including in vitro enzyme assays, enzymatic inhibitors, analysis of transformation products, and various -omic techniques, are discussed. Perspectives on major challenges and future research requirements to enhance the biotransformation of organic micropollutants are proposed.
BIORESOURCE TECHNOLOGY
(2022)
Article
Ecology
Ana Pascual, Rocio Pena, Santiago Gomez-Cuervo, David de la Varga, Juan A. Alvarez, Manuel Soto, Carlos A. Arias
Summary: The WETWINE project in Spain has successfully established an engineering system to valorise winery treated wastewater through a combination of HUSB reactor and constructed wetlands. After two years of monitoring, the hybrid system achieved efficient removal of suspended solids and COD, along with improved removal efficiency for nitrogen and pH.
ECOLOGICAL ENGINEERING
(2021)
Article
Energy & Fuels
Miguel Alvarez Pallin, Sandra Gonzalez-Rodriguez, Gemma Eibes, Maria Lopez-Abelairas, Maria Teresa Moreira, Juan M. Lema, Thelmo A. Lu-Chau
Summary: This study evaluated the feasibility of using the white-rot fungus Irpex lacteus for fungal pretreatment of lignocellulosic biomass at a demonstration scale. A versatile vertical design of a 22 L SSF reactor was selected, and the results showed similar wheat straw digestibility to that achieved on a small scale. Online monitoring variables were also found to correlate with fungal action on the straw, and comparable weight loss results were obtained at flask and reactor scale.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Editorial Material
Engineering, Environmental
Manuela Antonelli, Andrea Turolla, Elena Ficara, Juan Lema, Roberto Canziani, Francesca Malpei
WATER SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Environmental
Adrian Arias, Tomas Allegue, Alaa Darwich, Manuel Fachal-Suarez, Miguel Martinez-Quintela, Francisco Omil, Juan Manuel Garrido
Summary: The study found that by adjusting the concentration and composition of mineral medium in the reactor, the nitrite removal capacity of N-damo bacteria can be improved, achieving the highest reported rates in an N-damo bacteria enrichment.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Engineering, Environmental
Miguel Martinez-Quintela, Sabela Balboa, Jose R. Coves, Francisco Omil, Sonia Suarez
Summary: This study investigated the biotransformation of organic micropollutants under anoxic conditions using a heterotrophic denitrifying bioreactor. The results showed that increasing nitrogen loading rates improved the removal efficiency of erythromycin, roxithromycin, and bisphenol-A, and specific bacterial taxa were identified as indicators related to the biodegradation of these compounds. The study also found that increasing primary metabolic activity did not enhance the removal rates of the organic micropollutants, suggesting that bacterial composition is more influential than cometabolism.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Agricultural Engineering
Ander Castro-Fernandez, Anton Taboada-Santos, Sabela Balboa, Juan M. Lema
Summary: The study compared the potential to produce volatile fatty acids (VFA) from sewage sludge, both raw and thermally pre-treated. In batch mode, raw sludge obtained the highest maximum VFA yield at pH 8, while pre-treated sludge achieved a lower value. Continuous reactor operation showed that thermal hydrolysis pre-treatment (THP) did not significantly influence VFA yields. Microbial community analysis revealed that the phylum Fumicutes was predominant in both reactors and the enzymatic profiles involved in VFA production were similar regardless of the substrate fed.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Jan Struckmann Poulsen, Alba Trueba-Santiso, Juan M. Lema, Simon Gregersen Echers, Reinhard Wimmer, Jeppe Lund Nielsen
Summary: In this study, the biodegradability of PBAT monomers in thermophilic conditions was investigated using anaerobic digester sludge. 13C-labelled monomers and proteogenomics were used to track labelled carbon and identify the microorganisms involved in the process. Bacteroides, Ichthyobacterium, and Methanosarcina were found to be directly involved in the metabolization of at least one monomer.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
R. Bevilacqua, M. Mauricio-Iglesias, S. Balboa, J. M. Lema, M. Carballa
Summary: This study investigates the influence of sugar-to-protein (STP) ratio on anaerobic cofermentation outcomes, finding that glucose had no effect on casein conversion as long as the STP ratio was ≤1, but promoted the production of fatty acids. However, an STP ratio >1 inhibited amino acid consumption and reduced volatile fatty acid production.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2022)
Article
Engineering, Environmental
R. Bevilacqua, A. Regueira, M. Mauricio-Iglesias, J. M. Lema, M. Carballa
Summary: This study demonstrated the feasibility of chain elongation processes during protein mixed culture fermentation without electron donor supplementation. Key parameters for the occurrence of chain elongation include simultaneous availability of suitable amino acids and short chain volatile fatty acids, as well as an acid equivalent concentration threshold. Initial supplementation of acetic acid can alter the selectivity of the elongation process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Lorena Gonzalez-Gil, Eduardo Fernandez-Fontaina, Randolph R. Singh, Juan M. Lema, Marta Carballa, Diana S. Aga
Summary: This study investigates the role of heterotrophic and nitrifying microorganisms in the biotransformation of pharmaceutically active compounds, showing that the activity of nitrifying sludge is influenced by both sludge retention time and feeding composition. Nitrifiers and slow-growing heterotrophs present in the nitrifying sludge play a significant role in the co-metabolic biotransformation of certain compounds.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(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)
