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)
Article
Engineering, Environmental
Thobias Pereira Silva, Mauricio Guimaraes de Oliveira, Jose Marcos Marques Mourao, Andre Bezerra dos Santos, Erlon Lopes Pereira
Summary: This study developed a mathematical model based on Monte Carlo simulation to predict the energy potential of biogas produced in an up-flow anaerobic sludge blanket (UASB) reactor treating swine wastewater (SWW). Lab-scale experiments and literature information were used to determine the energy potential of SWW at different organic loading rates (OLRs). The model allowed an estimation close to reality, with reduced errors, making it a relevant tool for entrepreneurship and energy self-sufficiency projects.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Multidisciplinary Sciences
Fabrice Ndayisenga, Zhisheng Yu, Bobo Wang, Jie Yang, Gang Wu, Hongxun Zhang
Summary: This research investigated the potential use of leftover residues from a bioconversion system for agricultural straw wastes into hydrogen energy as a biofertilizer. The results showed that the residues contained various plant growth-promoting microbial communities and provided essential nutrients for plant growth. Direct application of the residues as fertilizer significantly promoted plant growth and flowering. Electrohydrogenesis residues could be considered as a potential biofertilizer.
SCIENTIFIC REPORTS
(2022)
Review
Agricultural Engineering
Runze Xu, Shiyu Fang, Le Zhang, Xiaoshi Cheng, Wenxuan Huang, Feng Wang, Fang Fang, Jiashun Cao, Dongbo Wang, Jingyang Luo
Summary: The study revealed the significant impact of intrinsic drawbacks in WAS on AD performance, including cemented structure, low biomass fraction, and high levels of inhibitory pollutants. To enhance WAS digestion efficiency, potential strategies such as pretreatment, bioaugmentation, and substance addition were critically analyzed. Future directions for improving WAS digestion were also proposed from technical, management, and economic perspectives.
BIORESOURCE TECHNOLOGY
(2022)
Review
Environmental Sciences
Xu Wang, Cancan Jiang, Huacai Wang, Shengjun Xu, Xuliang Zhuang
Summary: This paper reviewed the development of pretreatments based on different technologies for anaerobic digestion and evaluated their energy benefit. Energy-intense pretreatments, such as thermal and ultrasound-based methods, generally result in significant increases in methane yield but consume extra energy input. On the other hand, combined pretreatment consisting of multiple technologies and the combination of energy-intense methods and chemicals potentially reduce energy input and ensure high methane yield. Integrating greenhouse gas emission into the evaluation system of pretreated anaerobic digestion is further warranted.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Agricultural Engineering
Jibao Liu, Xianglin He, Hui Zhong, Pei Lei, Junya Zhang, Yufeng Xu, Yuansong Wei
Summary: Thermal hydrolysis reduces the content of methylmercury in sewage sludge, with high temperature promoting both mercury methylation and methylmercury demethylation. Ruminococcaceae, Peptococcaceae, and Lachnospiraceae are potential methylators during hydrolysis and acidogenesis stage, while methylmercury demethylation dominates in the late period of anaerobic digestion.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Qian Jiang, Chao Zhang, Ping Wu, Peng Ding, Yan Zhang, Min-hua Cui, He Liu
Summary: The study found that adding Taihu blue algae biochar (ABC) at different inoculation ratios can enhance methane production, with more favorable enrichment of Methanosarcina at lower inoculation ratios. Mechanism analysis showed that the improvements in methane production at lower inoculation ratios were not due to initial organic loading rate increments.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
Patricio Neumann, Cristian Riquelme, Javier Cartes, Mathias Kuschel-Otarola, Almudena Hospido, Gladys Vidal
Summary: This study assessed the influence of anaerobic digestion and land application on environmental impacts and proposed recommendations for optimizing the environmental performance of sludge management. The results showed that operational conditions and management practices have significant effects on environmental impacts.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Agricultural Engineering
Shuohui Shi, Meng Cao, Ying Zhang, Xing Fan, Shihu Liu, Jiahao Chen, Jian Zhou
Summary: A thermal-alkali-biofilm pretreatment (TAB) was established to improve the anaerobic digestion of high-solid and low-organic-content sludge. TAB significantly enhanced WAS reduction, hydrolysis/acidogenesis efficiency, and biochemical methane potential by stimulating proteolysis and solubilizing WAS. In addition, biofilm assistance accelerated the elimination of autochthonous bacteria and promoted the enrichment of specialized fermentative microorganisms and relevant functional genes, contributing to enhanced hydrolysis/acidogenesis in TAB.
BIORESOURCE TECHNOLOGY
(2023)
Review
Environmental Sciences
Anna Christine Trego, Simon Mills, Gavin Collins
Summary: Anaerobic digestion is recognized as a sustainable method for waste management, producing methane-rich biogas. Different specialized granules, including anaerobic and aerobic granules, have opened up new opportunities in wastewater treatment and resource recovery biotechnology. Each type of granule has unique characteristics, biochemical processes, and microbial community compositions.
CRITICAL REVIEWS IN ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yongsen Shi, Manli Liu, Jingyi Li, Yilin Yao, Jingchun Tang, Qigui Niu
Summary: The study found that moderate application of biochar can alleviate the bio-toxicity suppression of oily sludge, improving methane fermentation efficiency and enhancing mesophilic digestion performance through the promotion of interspecies electron transfer among microorganisms.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Hazal Aksu Bahceci, Selim L. Sanin, F. Dilek Sanin
Summary: The study evaluated the biodegradability and co-digestion performance of industrial sludges alone and mixed with municipal sludge. Reactors containing only municipal sludge showed the highest methane production potential, while those containing only industrial sludge exhibited the lowest. Co-digestion of some industrial sludges with municipal sludge is possible with closely coordinated additions, although it may reduce biogas production.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Engineering, Environmental
Haipeng Wang, Hao Sun, Hongyu Ren, Guangli Cao, Guojun Xie, Defeng Xing, Nanqi Ren, Bingfeng Liu
Summary: In this study, high-solids anaerobic digestion (HSAD) of human feces (HF) was conducted using a semicontinuous culture operated for 190 days. Results showed that the highest tolerated concentration of total solids (TS) was 16%, and biogas production stopped at 17% TS. The highest methane production rates were achieved at 11% TS for both TS and volatile solids (VS), and the AD system was inhibited when thresholds of volatile fatty acids and ammonia nitrogen were exceeded. Granular sludge as an inoculum efficiently removed pathogens and different TS concentrations resulted in changes in methanogenesis types. These findings provide guidance for practical applications of HF HSAD.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Paula Yumi Takeda, Cristiane Arruda Oliveira, Maria Eduarda Simoes Dias, Carolina Tavares Paula, Andre do Vale Borges, Marcia Helena Rissato Zamariolli Damianovic
Summary: Anaerobic co-digestion using glycerol in the off-season and vinasse in the harvest season can improve the performance and energy recovery of anaerobic systems. It can increase energy generation by approximately 17.5% in the sugarcane biorefinery and ensure system stability.
Article
Agricultural Engineering
Han Yan, Jianzheng Li, Jia Meng, Jiuling Li, Avinash Kumar Jha, Yafei Zhang, Yiyang Fan, Xin Wang
Summary: The performance of anaerobic sludge and microbial social behaviors in an expanded granular sludge bed (EGSB) were evaluated by increasing reflux ratio from 50% to 500% in stages. The study found that a reflux ratio of 100% - 200% was most favorable for EGSB with a methane production of 2.4 m3/m3.d. Acylhomoserine lactones (AHLs)-mediated quorum sensing (QS) played a key role in balancing microbial populations and enhancing the anaerobic digestion process.
BIORESOURCE TECHNOLOGY
(2021)
Article
Environmental Sciences
A. Azevedo, J. Gominho, E. Duarte
Summary: Agro-food industries generate large amounts of bio-waste, leading to the need for innovative valorization strategies within the framework of circular economy principles. Anaerobic digestion technology offers a promising route for stabilizing organic matter and producing biogas as a renewable energy source. This study focused on optimizing the conditions for anaerobic co-digestion of pig slurry with pineapple peel bio-waste, showing potential for increased bioenergy recovery compared to traditional substrates.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Engineering, Environmental
I Silva, C. Jorge, L. Brito, E. Duarte
Summary: The study assessed the impact of a feast/famine regime with different feeding frequencies on biogas and biomethane yield, demonstrating that lower feeding frequencies led to increased biogas and methane production.
WASTE MANAGEMENT & RESEARCH
(2021)
Article
Engineering, Environmental
Rita Fragoso, Ana Catarina Henriques, Javier Ochando-Pulido, Nicole Smozinski, Elizabeth Duarte
Summary: The study focused on improving the biodigestibility of mixed sewage sludge and partially dephenolised two-phase olive pomace through co-digestion. The addition of DOP into WWTP anaerobic digester facilities significantly increased biomethane production and system stability, leading to energy savings and improved performance. This strategy shows promise for enhancing biogas production and methane yield in wastewater treatment plants.
WASTE MANAGEMENT & RESEARCH
(2022)
Article
Food Science & Technology
Antonia Macedo, Jose Bilau, Eunice Camboias, Elizabeth Duarte
Summary: This study evaluates the efficiency of using ultrafiltration/diafiltration to recover protein fractions from goat and sheep cheese whey by-products. Economic analysis shows that this system is economically viable for small to medium sized cheese dairies.
Article
Biochemistry & Molecular Biology
Antonia Macedo, David Azedo, Elizabeth Duarte, Carlos Pereira
Summary: This study developed an integrated process for the recovery of sweet goat whey components through filtration, centrifugation, pasteurization, and sequential membrane processes. The application of this process led to the retention of proteins and lactose in whey, allowing for their total recovery in cheese dairy plants. This integrated process can contribute significantly to the sustainability of small- or medium-sized goat cheese dairies.
Article
Multidisciplinary Sciences
Bruno Gouveia, Elizabeth Duarte, Aires dos Santos, Edgar Fernandes
Summary: Anaerobic digestion plays an important role in reducing greenhouse gas emissions and transitioning to a circular economy by creating value from waste. A developed analytical model accurately describes the kinetics of biogas production, reducing the need for time-consuming batch tests. The model has been successfully tested and provides valuable insights into the internal processes of anaerobic digestion and substrate characteristics.
Article
Public, Environmental & Occupational Health
Aducabe Bancessi, Rosa Teodosio, Elizabeth Duarte, Aladje Balde, Luis Catarino, Teresa Nazareth
Summary: This study explored the perceptions of a group of women in Guinea-Bissau regarding household water purification strategies. The findings revealed a general underestimation of the risk of waterborne diseases and a strong belief in the efficacy of moringa-teabags for water purification. However, there is also a need for more information on water treatment and safety.
Article
Environmental Sciences
Eduarda Freitas Diogo Januario, Taynara Basso Vidovix, Anna Carla Ribeiro, Elizabeth da Costa Neves Fernandes de Almeida Duarte, Rosangela Bergamasco, Angelica Marquetotti Salcedo Vieira
Summary: In this study, a new hydrochar adsorbent was developed by chemical and thermal modification of peach stones for efficient removal of caffeine from water. The experimental results showed that the new hydrochar adsorbent exhibited good adsorption performance and removal efficiency towards caffeine.
ENVIRONMENTAL TECHNOLOGY
(2022)
Review
Environmental Sciences
Amir Gholipour, Rita Fragoso, Elizabeth Duarte, Ana Galvao
Summary: This review provides an overarching assessment of the currently available knowledge of Sludge Treatment Reed Beds (STRBs) technology worldwide and identifies the interconnections between operational parameters and system efficiency under different climatic patterns through Meta-Analysis (MA). The findings suggest the feasibility and applicability of STRB technology under different climatic conditions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Food Science & Technology
Antonia Macedo, Tania Gomes, Carlos Ribeiro, Margarida Moldao-Martins, Elizabeth Duarte, Vitor D. Alves
Summary: This research investigates the performance of ultrafiltration and nanofiltration in fractionating the nutritive/functional compounds present in aqueous extracts of mango peel. The study suggests that the nanofiltration concentrates can be utilized by the food industry or for bioenergy production.
Article
Biochemistry & Molecular Biology
Antonia Macedo, Rita Fragoso, Ines Silva, Tania Gomes, Catia F. Martins, Joao Bengala Freire, Elizabeth Duarte
Summary: The study evaluated the impact of adding sugar concentrate solutions obtained from nanofiltration of fruit biowaste to slurry from piglets fed with macroalgae on biogas production. The use of nanofiltration of mango peel extracts increased the methane production by 29% during anaerobic co-digestion. These findings contribute to the development of sustainable valorization routes for biowastes.
Article
Chemistry, Physical
Sofia Lewis Lopes, Rita Fragoso, Elizabeth D'Almeida Duarte
Summary: This study uses real industrial data to provide a decision-making approach for the cold-pressed juice industry. Through multicriteria decision analysis, factors such as availability and physicochemical characteristics of fruit and vegetable pomaces (FVP) are considered. Two management routes are proposed, and the theoretical biochemical methane potential of FVP is predicted. The findings suggest that FVP should be used as a co-substrate in the anaerobic digestion process.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Food Science & Technology
Silvia Sousa, Elizabeth Duarte, Marta Mesquita, Sandra Saraiva
Summary: This study focuses on the continuous co-digestion of pig slurry, cereal, and exhausted coffee wastes to improve bioenergy production. Results indicate that a feeding ratio of 70:30 leads to the highest specific methane production. Co-digestion of PS and CECL shows promise in bioenergy recovery and promoting circularity of biowastes.
FRONTIERS IN SUSTAINABLE FOOD SYSTEMS
(2021)
Article
Environmental Sciences
Elizabeth Duarte, Rita Fragoso, Nicole Smozinski, Jorge Tavares
Summary: This study proposes a simple approach to assess the energy performance of livestock manure and mixed sewage sludge by adding various agro-food biowastes as co-substrates, which significantly increases the energy performance indicator. This conceptual approach promotes the circular bioeconomy by encouraging stakeholders to utilize anaerobic biotechnology at a rural or urban level.
JOURNAL OF SUSTAINABLE DEVELOPMENT OF ENERGY WATER AND ENVIRONMENT SYSTEMS-JSDEWES
(2021)
Review
Food Science & Technology
Joaquim M. Costa, Margarida Oliveira, Ricardo J. Egipto, Joao F. Cid, Rita A. Fragoso, Carlos M. Lopes, Elisabeth N. Duarte
CIENCIA E TECNICA VITIVINICOLA
(2020)
