Article
Environmental Sciences
Jacopo Foschi, Andrea Turolla, Manuela Antonelli
Summary: This study evaluated black-box regression models as a modeling alternative for UV disinfection, synthesizing hydrodynamics, fluence rate, and inactivation kinetics. The two-part artificial neural network model showed the best predictive performance, handling non-linearities and a high proportion of null values in the dataset. The deployment of this model to control ultraviolet disinfection was simulated, estimating a plausible 63% energy saving.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Silvia Bonetta, Cristina Pignata, Elisa Gasparro, Lisa Richiardi, Sara Bonetta, Elisabetta Carraro
Summary: This study investigates the impact of wastewater treatment on microbiological contamination and evaluates the potential risks associated with wastewater effluent reuse, based on new EU legislation. The results show that wastewater treatment plants equipped with membrane bioreactor (MBR) system have good abatement performance. However, effluents disinfected with chlorine dioxide (ClO2) show contamination by E. coli and Salmonella spp. Legionella spp. is also present in wastewater, highlighting the need for further investigation on aerosol formation during reuse. Molecular methods for pathogen detection in wastewater could provide a more precautionary risk estimation for reuse.
ENVIRONMENTAL SCIENCES EUROPE
(2022)
Article
Chemistry, Physical
Meisam Ashrafivala, Seyed Borhan Mousavi, Saeed Zeinali Heris, Mohammad Heidari, Mousa Mohammadpourfard, Hassan Aslani
Summary: Wastewater recycling and reuse are particularly important in countries with water scarcity issues, and disinfection is a crucial step in achieving this goal. This research investigates the use of the advanced oxidation process combining UV and H2O2 for fecal coliform inactivation in industrial effluent. Optimal disinfection conditions were determined based on parameters such as pH, H2O2 concentration, and contact time. The results show that acidic conditions, increased H2O2 concentration, and longer contact time contribute to higher inactivation rates. The combined UV/H2O2 process is more effective than using UV or H2O2 alone and can meet irrigation standards.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Environmental Sciences
Hamed Khorasani, Jiale Xu, Thuy Nguyen, Zachary Kralles, Paul Westerhoff, Ning Dai, Zhenduo Zhu
Summary: This study investigates the impact of treated wastewater on downstream drinking water sources, with non-WWTP sources contributing significantly to HAN-FP concentration, and the contributions of the two sources varying with streamflow discharge fluctuations.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Engineering, Environmental
Xueru Luo, Baoping Zhang, Yinghua Lu, Yang Mei, Liang Shen
Summary: This review paper summarizes the latest research on using UV to control biofilms in water and wastewater infrastructure, including the development of UV light sources, resistance mechanisms of biofilms to UV, and the feasibility of using UV to control biofilms. The paper also provides a comprehensive evaluation of the biofilm-targeted UV technologies currently used or potentially useful in the water industry.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Environmental
Josep Sanchis, Wolfgang Gernjak, Antoni Munne, Nuria Catalan, Mira Petrovic, Maria Jose Farre
Summary: A full-scale trial was conducted in summer 2019 to investigate the effects of discharging tertiary treated wastewater into the Llobregat River on drinking water quality. The study found that while the river contained low concentrations of NDMA, the NDMA precursors were already present at high levels. The concentration of NDMA in the drinking water was consistently low, but the formation potential varied.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
Arnesh Kumar Bose, Carol L. Beaver, Dinesh Maddipatla, Silvia Rossbach, Massood Z. Atashbar
Summary: A flexible microplasma discharge device (MDD) was developed for inactivating multi-drug resistant bacteria. The device showed high efficacy in killing bacteria within a short period of time and with higher input voltage, and demonstrated excellent flexibility.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Chemical
Hossein Kamani, Seyed Davoud Ashrafi, Eder C. Lima, Ayat Hossein Panahi, Mahdieh Garkani Nezhad, Hossein Abdipour
Summary: This study utilized solar/N-doped titanium dioxide (TiO2) process to remove coliform and fecal coliform from hospital sewage treatment plant effluent. The photocatalytic process efficiency was enhanced by increasing reaction time and nanoparticles dosage. After 150 minutes of solar/N-doped TiO2 treatment, the number of coliforms and fecal coliforms bacteria cells decreased significantly. Overall, the solar/N-doped TiO2 process effectively deactivated a wide range of real effluent microorganisms on a laboratory scale.
DESALINATION AND WATER TREATMENT
(2023)
Article
Engineering, Environmental
Miguel Herraiz-Carbone, Salvador Cotillas, Engracia Lacasa, Canizares Pablo, Manuel A. Rodrigo, Cristina Saez
Summary: This study focuses on the removal of antibiotic-resistant bacteria (ARB) in hospital urine using UV disinfection enhanced by electrolysis, showing that electrolysis can improve the disinfection effect of UV disinfection, achieving complete disinfection of hospital urine.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Chemistry, Physical
Xuefei Tan, Huiwen Wang, Xiaoyan Guo, Shih-Hsin Ho
Summary: This review focuses on wastewater treatment methods based on catalytic technology, with an emphasis on developing greener, more efficient, and economically favorable catalysts using agricultural residues. The main discussions include the preparation of biochar, improving catalytic performance, interactions between biochar surface properties and pollutants, and designing biochar-based catalysts for efficient pollutant degradation. The aim is to provide a waste disposal alternative for environmental pollution alleviation and the promotion of green chemistry and sustainable development.
Article
Environmental Sciences
Linlong Yu, Nicole Acosta, Maria A. Bautista, Janine McCalder, Jode Himann, Samuel Pogosian, Casey R. J. Hubert, Michael D. Parkins, Gopal Achari
Summary: UV-LED irradiation has been studied for disinfection of water and wastewater. This study investigates the impact of light intensity on UV dosage for disinfection, and compares the performance of 280 nm UV-LED with 405 nm visible light LEDs in inactivating E. coli and reducing cATP activities. Results show that increasing light intensity can decrease UV dose needed for disinfection.
Article
Environmental Sciences
Md. Ahasan Habib, Serena Cocciolo, Md. Abdul Haque, Md. Mir Abu Raihan, Prosun Bhattacharya, Anna Tompsett
Summary: Access to safe drinking water in rural Bangladesh remains a challenge, with most households exposed to either arsenic or faecal bacteria in their primary source of drinking water. Improving tubewell cleaning and maintenance practices could reduce faecal contamination, but the effectiveness of current practices is unclear. A randomized experiment found that disinfecting the well with chlorine solution consistently improved water quality, but caretakers cleaning the wells themselves did not follow best-practice approaches, resulting in a decline in water quality.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biotechnology & Applied Microbiology
Kai-Feng Yu, Peng Li, Bo Zhang, Yiliang He
Summary: Wastewater reuse is an important solution to water scarcity, but the potential risks of antimicrobial resistance hinder its wide application. Designing tertiary treatment processes to enhance the removal efficiency of antibiotic resistance genes is necessary.
CURRENT OPINION IN CHEMICAL ENGINEERING
(2023)
Article
Environmental Sciences
Abidelfatah Nasser, Sivan Sasi, Yeshayahu Nitzan
Summary: This study focused on concentrating and reducing coliphages in treated effluent, comparing various methods and evaluating their efficiency. The research highlighted the relationship between FC and coliphages, suggesting that monitoring coliphages could be a more accurate indicator of health risks posed by the application of tertiary effluent.
FOOD AND ENVIRONMENTAL VIROLOGY
(2021)
Article
Materials Science, Textiles
Fazlihan Yilmaz, M. Ibrahim Bahtiyari
Summary: The study investigated the disinfection processes of textile products and found that necessary and sufficient disinfection effect was obtained on cotton fabric in very short application time, especially using ozone gas.
JOURNAL OF NATURAL FIBERS
(2022)