Article
Engineering, Environmental
Shahla Radmehr, Tiina Rissanen, Mari Kallioinen-Manttari, Mika Manttari
Summary: The aim of this study is to reduce mechanical aeration in membrane bioreactors (MBR) by introducing algae cells without compromising purification efficiency and membrane fouling. The results showed that with a suitable inoculation ratio of algae cells (50% of total biomass), a 60% reduction in mechanical aeration was achieved in the MBR without affecting purification efficiency and membrane fouling. Moreover, controlling mechanical aeration allows for the control of algae cell growth rate compared to bacteria cells and maintains a constant ratio of algae and bacterial biomass in the MBR.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Review
Agricultural Engineering
Sining Zhou, Min Liu, Ben Chen, Lianpeng Sun, Hui Lu
Summary: This review provides a systematic introduction to microbubble and nanobubble aeration in the activated sludge process, highlighting their potential applications and mechanism for improving gas-liquid mass transfer. It also discusses the recent advances and effects of microbubble and nanobubble aeration in wastewater treatment.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
G. Plestenjak, K. Eler, R. Mihelic, M. Ferlan, N. Ogrinc, B. Krajnc, D. Vodnik
Summary: The study showed that artificial aeration can accelerate the sludge decomposition process in STRBs, whether through active aeration or passive aeration beds. However, this acceleration effect is limited to certain seasons and aspects of CO2 emissions.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Thermodynamics
Wei Li, Xing Liu, Can Lu
Summary: The EU Carbon Border Adjustment Mechanism will impose carbon tariffs on imported goods, affecting China's steel trade. To reduce carbon tariffs, accelerating carbon reduction capacity and promoting green certificates offsetting carbon tariffs can be effective measures with low cost increase rate.
Review
Biotechnology & Applied Microbiology
Derin Orhon, Seval Sozen, Emine Ubay Cokgor, Paul Janssen
Summary: This study reviewed the conceptual basis and application of extremely high rate activated sludge configurations with gravity settling. A modeling framework was established to simulate the performance and energy recovery potential of these processes, and the evaluation was extended to cover a current case study. The results were discussed in relation to the limitations of gravity settling and the advantages of high-rate membrane bioreactors.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2022)
Article
Thermodynamics
Shu-Xia Yang, Tian-qi Nie, Cheng-Cheng Li
Summary: This study examines the impact of time-of-use tariff on emission reduction in regional Energy Internet, demonstrating that time-of-use tariff is beneficial for reducing carbon emissions and lowering costs. Moreover, the energy conservation and emission reduction effects are more significant when the time-of-use tariff fluctuation ratio is less than 1 and the peak-to-valley electricity price ratio is between 2-3.
Article
Engineering, Environmental
N. Guerra-Gorostegi, D. Gonzalez, B. Puyuelo, J. Ovejero, J. Colon, D. Gabriel, A. Sanchez, S. Ponsa
Summary: This study evaluates the feasibility of valorizing cellulosic sludge as a renewable energy source through biodrying technology, comparing three different aeration strategies. Innovative biodrying performance indicators were proposed to assess energy process efficiency and product quality. Results showed economic viability and attractiveness of biodrying technology for cellulosic sludge.
Article
Engineering, Environmental
Jia-Ying He, Hong-Ling Zhang, Hong Wang, Ya-Qi Hu, Yong Zhang
Summary: The effects of pure oxygen aeration on the compositional characteristics of SMP and EPS in activated sludge were studied. Different aeration methods and rates can change the structure of extracellular products and affect the proportion of proteins and polysaccharides. Adjusting the aeration rate and mode can regulate the components in extracellular products to optimize the treatment process of activated sludge.
WATER SCIENCE AND TECHNOLOGY
(2021)
Article
Engineering, Environmental
Ahmed Shawki Ahmed, Diego Rosso, Domenico Santoro, George Nakhla
Summary: This study investigated the impact of bioreactor configurations on aeration modeling dynamics by incorporating different correlations. It was found that different correlations had varying effects on predicting air flow rates and that bioreactor structure not only affected spatial and temporal biological oxygen demands, but also oxygen transfer efficiency. The study established the suitability of different correlations for designing specific bioreactor systems, highlighting the need for considering the impact of influent loading rates on the alpha-factor.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Mengjie Liu, Nigel J. D. Graham, Lei Xu, Kai Zhang, Wenzheng Yu
Summary: A bubbleless aerated BAC process was developed by installing a hollow fiber membrane module within a BAC filter, which improved the dissolved oxygen concentrations and enhanced the biodegradation and metabolism capacity. The ABAC system showed a higher electron transfer capacity and lower extracellular polymeric substances secretion, resulting in enhanced contaminant degradation efficiency and long-term stability. This proposed ABAC filter provides a practical example of how to shape and activate microbial community in BAC technology.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Federico Pasini, Manel Garrido-Baserba, Ahmed Ahmed, George Nakhla, Domenico Santoro, Diego Rosso
Summary: Primary screening can significantly improve oxygen transfer efficiency, with improvements of 27% at pilot scale and 20% at full scale. By integrating changes in oxygen transfer efficiency and carbon redirection, the impact of primary screening on facility energy balance can be explored. Through wide-plant assessment of different scenarios, primary screening can improve energy balance up to 15%, providing insight into the advantages and limitations of energetic sustainability.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Energy & Fuels
Xingyu Zang, Hangxin Li, Shengwei Wang
Summary: This study investigates the optimal design of energy-flexible distributed energy systems in cooling-dominated regions and the impacts of energy storage parameters. The time-of-use tariff has significant impacts on system design, and increasing the peak-to-valley ratio can enhance the economic benefits. However, high unit prices of energy storages may make them economically unfavorable under all time-of-use tariffs.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Environmental Sciences
Guanying Wang, Guanglei Qiu, Jian Wei, Zhuang Guo, Weiye Wang, Xiaoling Liu, Yonghui Song
Summary: With the development of industries, explosion accidents occur frequently during production, transportation, usage, and storage of hazardous chemicals. The activated carbon-activated sludge (AC-AS) process shows promising potential in efficiently treating wastewater with high concentrations of toxic compounds. In this study, AC and AS were used to treat wastewater from an explosion accident, resulting in increased removal efficiency and shortened treatment time compared to traditional processes. Metagenomic analysis and spectroscopy were used to explore the enhancement mechanism of AC on AS, revealing the important roles of certain bacteria and genes in pollutant degradation. This study demonstrates the universal characteristics of the AC-AS process for treating wastewater with high levels of organic matter and toxicity.
ENVIRONMENTAL RESEARCH
(2023)
Article
Engineering, Environmental
Federico Pasini, Manel Garrido-Baserba, Travis Sprague, Pietro Cambiaso, Diego Rosso
Summary: This study demonstrates the substantial improvements associated with reducing DO set points at full scale, showing an overall enhancement of oxygen transfer efficiency and potential energy savings. Quantification of the influence of oxygen transfer efficiency on operating choices and site-specific conditions was conducted, with a direct evidence of 20% energy savings achievable through DO reduction strategies.
WATER ENVIRONMENT RESEARCH
(2021)
Review
Environmental Sciences
Cristina Penasco, Laura Diaz Anadon, Elena Verdolini
Summary: The study found that regulatory and economic and financial instruments have positive impacts on environmental, technological, and innovation outcomes, but some instruments may have short-term negative impacts on competitiveness and distributional outcomes. By cleverly designing research and development and government procurement, deployment policies, carbon pricing, and trading measures, these trade-offs can be reduced or transformed into co-benefits.
NATURE CLIMATE CHANGE
(2021)
Article
Engineering, Environmental
Samuel Reifsnyder, Manel Garrido-Baserba, Francesca Cecconi, Larry Wong, Phil Ackman, Nikos Melitas, Diego Rosso
Article
Environmental Sciences
Yian Sun, Manel Garrido-Baserba, Maria Molinos-Senante, Nubia A. Donikian, Manel Poch, Diego Rosso
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Engineering, Environmental
Ahmed Shawki Ahmed, Ahmed Khalil, Yuichi Ito, Mark C. M. van Loosdrecht, Domenico Santoro, Diego Rosso, George Nakhla
Summary: The study found that oxygen transfer efficiency in municipal wastewater treatment plants is affected by wastewater characteristics, with readily biodegradable substrates having a greater impact on aeration efficiency. Cellulose in influent wastewater can be efficiently removed using primary treatment technologies.
Article
Engineering, Environmental
Francesca Cecconi, Diego Rosso
Summary: This study built an artificial neural network model to predict the ammonium content in the effluent and conduct fault detection by utilizing the residual between the model prediction and the sensor signal. Typical faults collected from a historic dataset were utilized to accurately identify treatment process anomalies, calibration bias faults, and fouling drifts.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Ahmed Shawki Ahmed, Diego Rosso, Domenico Santoro, George Nakhla
Summary: This study investigated the impact of bioreactor configurations on aeration modeling dynamics by incorporating different correlations. It was found that different correlations had varying effects on predicting air flow rates and that bioreactor structure not only affected spatial and temporal biological oxygen demands, but also oxygen transfer efficiency. The study established the suitability of different correlations for designing specific bioreactor systems, highlighting the need for considering the impact of influent loading rates on the alpha-factor.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Green & Sustainable Science & Technology
Mani Firouzian, Michael K. Stenstrom, Diego Rosso
Summary: This study examines the impact of an expansion project on a large water resource recovery facility in California in terms of treatment extent, electricity demand, carbon footprint, and operating cost. The findings suggest that the project's goal of improving electricity efficiency and reducing costs through the addition of certain equipment configurations is not feasible. Future research is recommended to focus on improving electricity efficiency to make such expansion projects viable.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Federico Pasini, Manel Garrido-Baserba, Travis Sprague, Pietro Cambiaso, Diego Rosso
Summary: This study demonstrates the substantial improvements associated with reducing DO set points at full scale, showing an overall enhancement of oxygen transfer efficiency and potential energy savings. Quantification of the influence of oxygen transfer efficiency on operating choices and site-specific conditions was conducted, with a direct evidence of 20% energy savings achievable through DO reduction strategies.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Environmental Sciences
Gustavo Andres Baquero-Rodriguez, Sandra Martinez, Julian Acuna, Daniel Nolasco, Diego Rosso
Summary: This study assessed the effects of elevation on the suitability of wastewater treatment process configurations and technologies. The results showed that elevation limits the selection of diffused aeration technologies and lower driving force for oxygen transfer leads to higher operating costs. The study recommends designing appropriate treatment processes for high elevation areas.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Manel Garrido-Baserba, Irene Barnosell, Maria Molinos-Senante, David L. Sedlak, Korneel Rabaey, Oliver Schraa, Marta Verdaguer, Diego Rosso, Manel Poch
Summary: Water systems need to become more locally robust and sustainable. Decentralized treatment has the potential to improve the technical, environmental, and economic performance. Assessments on various building types demonstrate that decentralized systems can satisfy water demand and reduce construction costs under certain climatic conditions.
Article
Engineering, Environmental
Daniel Bencsik, Imre Takacs, Diego Rosso
Summary: This paper proposes a new method to predict plantwide trends in the alpha factor through process modeling, accommodating diurnal and seasonal fluctuations, and investigates the relationship between the alpha factor and factors such as sludge retention time and organic loading.
Review
Environmental Sciences
Sunny C. Jiang, Heather N. Bischel, Ramesh Goel, Diego Rosso, Samendra P. Sherchan, Katrine L. Whiteson, Tao Yan, Helena M. Solo-Gabriele
Summary: Wastewater reclamation and reuse can supplement water supplies and meet increased water demand. Non-potable water reuse has potential, but economic constraints and safety concerns limit its widespread implementation. This article discusses advancements in monitoring and modeling viral health risks in water reuse, suggesting cost-effective strategies to assess risks associated with infectious human viruses.
Article
Environmental Sciences
Ismael Vera-Puerto, Jose Campal, Sandra Martinez, Laura Cortes-Rico, Hadher Coy, Sheyie Tan, Carlos A. Arias, Gustavo Baquero-Rodriguez, Diego Rosso
Summary: This research evaluated the oxygen transfer efficiency in beds to be used as aerated constructed wetlands using diffused aeration systems. The results showed that oxygen transfer efficiency was negatively influenced by environmental conditions, especially altitude, and that the size of the gravel used in the bed is related to the oxygen transfer efficiency.
Article
Engineering, Environmental
Josh Smeraldi, Linda Y. Tseng, Ishir Dutta, Rajagopalan Ganesh, Diego Rosso
Summary: This study examines the behavior, removal, and size distribution of suspended particles in wastewater treatment plants. It found that current treatment processes are not efficient in removing nano-sized particles, and there is a significant correlation between influent dissolved COD and the abundance of suspended particles. Managing dissolved COD may help control nano-sized particle production.
WATER ENVIRONMENT RESEARCH
(2023)
Article
Environmental Sciences
Zhiquan Song, Ryan Reinke, Mike Hoxsey, James Jackson, Eric Krikorian, Nikos Melitas, Diego Rosso, Sunny Jiang
Summary: The study found significant differences in viral concentrations detected in different wastewater treatment plants for SARS-CoV-2. The variability of the virus concentration cannot be simply explained by COVID-19 case reports. Continuous monitoring of SARS-CoV-2 in the same treatment plant can offer insights into community level trends of COVID-19.
Article
Engineering, Environmental
Lin Liu, Lixin Zhao, Yian Sun, Sheng Gao, Minzheng Jiang, Minghu Jiang, Diego Rosso
Summary: The study examined the impact of the inlet section of hydrocyclones on separation efficiency and designed a novel hydrocyclone suitable for medium rearrangement. Simulations were used to compare the effects of different separating blocks on separation efficiency, with results indicating that SCB displayed excellent rearrangement effect and low pressure drop. Additionally, experimental data comparing CH and HMRI showed that HMRI achieved 6.4-8.0% higher separation efficiency than CH.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
