Article
Engineering, Environmental
Zhiyao Wang, Min Zheng, Haoran Duan, Gaofeng Ni, Wenbo Yu, Yanchen Liu, Zhiguo Yuan, Shihu Hu
Summary: The study demonstrates that aerobic digestion treatment under acidic conditions using the special ammonia-oxidizing bacterium 'Candidatus Nitrosoglobus' can significantly reduce the volume and improve the quality of anaerobically-digested sludge. The acidic aerobic digestion was found to effectively stabilize AD sludge and meet USEPA Class A biosolids standards.
Article
Engineering, Environmental
Eskandar Poorasgari, Banu Ormeci
Summary: Experimental and computational approaches were used to model the kinetics of volatile solids destruction during wastewater sludge digestion, taking into account the effects of water evaporation. New kinetic models were developed to predict volatile solids concentrations in different conditions. The study found that water evaporation is an important factor to consider for accurate determination of kinetic rate constants and solids reduction.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Environmental Sciences
Lei Li, Chen Cai, Yongdong Chen, Haoyu Liu, Rui Liu, Donghai Yang, Bin Dong, Xiaohu Dai
Summary: Microbial electrolysis cells integrated with anaerobic digestion showed significant enhancement of acidogenic fermentation from waste activated sludge. Electrically-assisted acidogenic fermentation and voltage supplementation resulted in increased production of volatile fatty acids. Voltage supplementation also led to improvements in soluble organic carbon, protein, and polysaccharide concentrations, as well as enzymatic activities, suggesting a secondary solubilization and hydrolysis of sludge.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Chemical
Tianwei Hao, Zheng Liu, Muxiang Liang, Xiaoming Liu, Jing Chen, Xiaohui Wu, Sunita Varjani, Feixiang Zan
Summary: This study demonstrates the significant impact of sulfite pretreatment on the solubilization and substrate release of PS, as well as the reduction of methane production from PS. Additionally, sulfite pretreatment affects the functional groups and degradation extent of PS.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Agricultural Engineering
Xuran Liu, Dongbo Wang, Zhijie Chen, Wei Wei, Giorgio Mannina, Bing-Jie Ni
Summary: This paper reviews the presence and inhibition mechanisms of refractory substances in waste activated sludge (WAS) and comprehensively discusses the pretreatment strategies for enhancing WAS biodegradability by facilitating refractory substances conversion. Future research needs to focus on removing the hindering barrier of refractory substances on WAS biodegradability.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Huan Liu, Xuan Li, Zehao Zhang, Long D. Nghiem, Li Gao, Qilin Wang
Summary: This study demonstrated that pretreatment of secondary sludge with free ammonia enhanced volatile solids destruction and methane production in semi-continuous anaerobic digestion systems. The FA pretreatment also improved sludge dewaterability and pathogen removal efficiency, while reducing the volume of dewatered sludge and overall cost. These findings suggest a promising strategy to enhance sludge reduction in anaerobic digestion processes.
Article
Agricultural Engineering
Cheng Sun, Liang Guo, Yongkang Zheng, Dan Yu, Chunji Jin, Yangguo Zhao, Zhiwen Yao, Mengchun Gao, Zonglian She
Summary: This study investigated two-stage anaerobic digestion of mixed sludge with different volume ratios, finding that the highest H-2 and CH4 yields were obtained in a volume ratio of 1:3 for primary and secondary sludge. Mixed sludge was found to have a positive effect on the release of organics and utilization of volatile fatty acids in anaerobic digestion. Investigating the compositional characteristics of dissolved organic matters revealed more degradable substances utilization in the mixture of sludge.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Lei Zhang, Yiyang Yuan, Yingdi Zhang, Yang Liu
Summary: This study investigates the feasibility of using calcium hypochlorite (Ca(ClO)(2)) to improve the thermophilic digestion of anaerobic wasted activated sludge (WAS). The results show that Ca(ClO)(2) pretreatment significantly enhances the removal efficiency and methane yield of WAS under low organic loading rate (OLR) conditions. However, the pretreatment effect is not significant under high OLR conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Thermodynamics
Yi Shi, Jiuping Xu
Summary: This study compares anaerobic co-digestion and separate anaerobic digestion treatments to explore the best resource utilization schemes for kitchen waste and excess sludge. A multi-objective mathematical model is developed to optimize the process, considering technology and policy factors. The results show that anaerobic digestion technology combined with suitable government policy support can significantly improve waste recovery efficiency. AcoD is found to be superior to SAD, and a 1:2 mixing ratio achieves the best biomethane conversion and economic benefits.
Article
Agricultural Engineering
Li-Jie Wu, Xiao-Xiao Li, Yu-Xiang Liu, Fan Yang, Quan Zhou, Rui-Peng Ren, Yong-Kang Lyu
Summary: The study optimized hydrothermal pretreatment conditions for continuous mesophilic and thermophilic anaerobic digestion, finding that hydrothermal pretreatment significantly increased methane production and volatile solids reduction in both systems.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Baoyan Chi, Ying Huang, Zhenfeng Xiong, Jiali Tan, Weidong Zhou, Zhuo Yang, Kemei Zhou, Xinxin Duan, Ao Chen, Rong Zha, Keting Gui
Summary: This study proposes a strategy for excess sludge slurry lysis based on thermophilic bacterial communities. The experiment reveals that thermophilic bacterial communities adapted to 75 degrees C exhibit the highest efficiency in sludge slurry lysis. The study also elucidates the mechanism of sludge lysis and discovers the occurrence of humification process during the lysis. These findings provide a theoretical basis for the application of this technology in reducing sludge generation in traditional wastewater treatment.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Meng Gao, Jiahui Yang, Siqi Li, Sinan Liu, Xiaofeng Xu, Feng Liu, Li Gu
Summary: This study explored a method to improve the anaerobic digestion of excess sludge and incineration leachate, revealing the potential mechanism of the AD process. The results showed that adding appropriate amounts of incineration leachate could enhance the efficiency of solubilization, hydrolysis, acidogenesis, and methanogenesis, leading to higher methane yields and improved digestive performance.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Agricultural Engineering
Shiva Khoei, Abigail Stokes, Brandon Kieft, Paul Kadota, Steven J. Hallam, Cigdem Eskicioglu
Summary: The addition of powdered biochar significantly increased methane production, shortened lag phase, and altered microbial community structure in thermophilic anaerobic digestion.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Chen Wang, Wei Wei, Xiaohu Dai, Bing-Jie Ni
Summary: This study presents a novel strategy of using calcium peroxide (CaO2) in aerobic sludge digestion and investigates its effects on sludge degradation and organic matter transformation. The results show that CaO2 addition enhances sludge biodegradability and promotes the accumulation of key microbes related to organics degradation. Chemical analyses further reveal that CaO2 facilitates the release of biodegradable organics and the degradation of recalcitrant organics, transforming them into more biodegradable forms. Additionally, CaO2 is found to promote the hydrolysis and catabolism of biodegradable substrates in sludge.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
Xiaolei Zhang, Ji Li, Wei Yang, Jiaxin Chen, Xiaochun Wang, Dingyu Xing, Wenyi Dong, Hongjie Wang, Jiawen Wang
Summary: Bioleaching was used to remove heavy metals from excess sludge generated during municipal wastewater treatment. Pretreatment of aerobic digestion or concurrent aerobic digestion with bioleaching increased the leaching amounts and stable-state proportions of heavy metals. Although the ammonia nitrogen and total phosphorus content were still higher than the soil background value, the treated sludge still had agricultural value. The enrichment of acid-producing bacteria was the main reason for the pH decrease and heavy metal removal.
Review
Environmental Sciences
Etienne Paul, Yolaine Bessiere, Claire Dumas, Elisabeth Girbal-Neuhauser
Summary: Biopolymers are becoming increasingly attractive for the production of chemicals, with microbial production being a key focus. Utilizing open mixed microbial cultures for biopolymer production from organic wastes can reduce costs and create new resources. Research on microbial community enrichment strategies is ongoing to make industrial biopolymer production a reality.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Environmental Sciences
Marianne Kock-Schulmeyer, Antoni Ginebreda, Mira Petrovic, Monica Giulivo, Oscar Aznar-Alemany, Ethel Eljarrat, Jennifer Valle-Sistac, Daniel Molins-Delgado, M. Silvia Diaz-Cruz, Luis Simon Monllor-Alcaraz, Nuria Guillem-Argiles, Elena Martinez, Lopez de Alda Miren, Marta Llorca, Marinella Farre, Juan Manuel Pena, Ladislav Mandaric, Sandra Perez, Bruno Majone, Alberto Bellin, Eleni Kalogianni, Nikolaos Th. Skoulikidis, Radmila Milacic, Damia Barcelo
Summary: The worldwide growing use of chemicals poses potential risks to human health and ecosystems. Mediterranean rivers differ from Northern and Central European rivers in terms of hydrological regime, climate conditions, and socio-economic factors, leading to variations in pollutant categories, water quality, and environmental fate.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Microbiology
Salima Aissaoui, Enelton Fagnani, Sandra Perez, Houria Ouled-Haddar, Mohamed Sifour
Summary: The study evaluated the biodegradation of diclofenac by a bacterial consortium, finding a high removal rate of 98% when diclofenac was used as the sole carbon source, but only 44% removal rate in co-metabolic conditions. Two metabolites were identified, suggesting the potential application of this bacterial consortium in diclofenac treatment.
BRAZILIAN JOURNAL OF MICROBIOLOGY
(2021)
Article
Environmental Sciences
Sara Gallego, David Nos, Nicola Montemurro, Juan C. Sanchez-Hernandez, Sandra Perez, Montserrat Sole, Fabrice Martin-Laurent
Summary: The use of reclaimed water in agriculture is a promising alternative to alleviate pressure on freshwater supplies, but may introduce micropollutants into the environment. Studies have shown that an antihypertensive drug has both dissipation and accumulation effects in soil-earthworm microcosms.
ENVIRONMENTAL POLLUTION
(2021)
Article
Engineering, Environmental
Laia Sabater-Liesa, Nicola Montemurro, Antoni Ginebreda, Damia Barcelo, Peter Eichhorn, Sandra Perez
Summary: Temporary rivers rely on wastewater effluent for base flows, impacting river ecosystems through exposure to nutrients and organic micropollutants. Biodegradation processes in these rivers can be enhanced by wastewater bacteria/biofilms.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Sara Gallego, Nicola Montemurro, Jeremie Beguet, Nadine Rouard, Laurent Philippot, Sandra Perez, Fabrice Martin-Laurent
Summary: The study evaluated the ecotoxicological risks of using wastewater for crop irrigation by assessing the fate of micropollutants in soil and their impact on plants and soil microorganisms. The results showed changes in soil bacterial community structure due to wastewater irrigation, but the bacterial evenness remained stable.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Biochemical Research Methods
Enelton Fagnani, Nicola Montemurro, Sandra Perez
Summary: This study investigates the degradation of pharmaceutical active compounds through photolysis simulation and utilizes different data acquisition strategies in mass spectrometry analysis to identify the photo-transformation products. Furthermore, an in-house library is created to provide reference information for freshwater samples analysis in impacted aquatic environments.
JOURNAL OF CHROMATOGRAPHY A
(2022)
Article
Environmental Sciences
Victoria Osorio, Alberto Cruz-Alcalde, Sandra Perez
Summary: Diclofenac (DCF) is partially removed in wastewater treatment plants to nitro/nitroso compounds, possibly due to the involvement of reactive nitrogen species produced by microorganisms. The biotransformation of DCF and related NSAIDs may not only be mediated by ammonia oxidizing bacteria, but also by other nitrifiers such as ammonia oxidizing archaea and nitrite oxidizing bacteria co-occurring in activated sludge, suggesting a complex behavior that requires further study to improve contaminant removal in WWTPs.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
R. Manasfi, D. Tadic, O. Gomez, S. Perez, S. Chiron
Summary: This study aimed to investigate the formation and persistence of N-oxides transformation products (TPs) of tertiary amine drugs through laboratory and field studies. The stability of N-oxides was observed, but their relative accumulation was lower compared to other transformation products and parent compounds.
Article
Agricultural Engineering
J. Figueras, H. Benbelkacem, C. Dumas, P. Buffiere
Summary: This study assessed the potential for high methane productivity through syngas biomethanation at higher flow rates. The results showed that by increasing the syngas flow rate and applying a biological enhancement factor, the highest methane productivity was achieved, providing a foundation for further industrialization.
BIORESOURCE TECHNOLOGY
(2023)
Article
Environmental Sciences
D. P. Manjarres-Lopez, J. M. Pena-Herrera, L. Benejam, N. Montemurro, S. Perez
Summary: Riverine fish in densely populated areas are exposed to wastewater-borne contaminants, which can enter the organism through the skin, gills, or ingestion. This study analyzed a panel of tissues to provide a comprehensive overview of the distribution of pollutants. High-performance liquid chromatography-high-resolution mass spectrometry was used to detect the presence of 600 pharmaceutically active compounds in four fish species. A total of 30 compounds were detected in at least one tissue, with a prevalence of antidepressants. The study identified specific compounds and recommended which tissues should be included in biomonitoring studies of pharmaceutically active compounds in riverine fish.
ENVIRONMENTAL POLLUTION
(2023)
Article
Multidisciplinary Sciences
D. P. Manjarres, N. Montemurro, S. Perez
Summary: This study optimized and validated an analytical method for the determination of 81 organic compounds, primarily PhACs, in various tissues and body fluids of fish. The method involved bead beating tissue homogenization, ultrasound extraction, and dispersive solid-phase extraction (dSPE) for purification. LC-HRMS Q-Exactive Orbitrap system was used for accurate quantitation. The method allowed for simultaneous extraction of PhACs with different polarities in tissues with varying lipid content.
Article
Multidisciplinary Sciences
F. Labad, N. Montemurro, S. Berisha, N. S. Thomaidis, S. Perez
Summary: The study compared eight QuEChERS-based methodologies for the quantification of 45 CECs in roots and leaves of soil-grown radish. Two single-step analytical methods specific for radish root and leaves were developed, with minimal time and solvent required for analysis. The validated methodologies have low limits of quantification and can be applied for the identification of a large number of compounds in radish crops.
Article
Engineering, Environmental
M. J. Gallardo-Altamirano, P. Maza-Marquez, S. Perez, B. Rodelas, C. Pozo, F. Osorio
Summary: The study investigated the operation of an A2O-IFAS system for removing emerging pollutants, particularly pharmaceutical compounds. Results showed that the A2O-IFAS system achieved similar or higher removal efficiency for organic matter and nutrients compared to conventional systems, even with low sludge retention time and mixed liquor suspended solid. The system demonstrated promising removal rates for certain pharmaceutical compounds, indicating its potential as a cost-effective upgrade for wastewater treatment plants.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
J. Llado, C. Lao-Luque, M. Sole-Sardans, N. Montemurro, S. Perez, E. Fuente, B. Ruiz
Summary: This study investigated the adsorption properties of carbon materials on different types of pollutants, finding that materials with different pore sizes are more suitable for adsorbing different types of pollutants. The presence of natural organic matter influences the adsorption capacity of pollutants on carbon materials.
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)
