Review
Agricultural Engineering
Yu-Jen Lee, Bin-le Lin, Zhongfang Lei
Summary: This review provides updated information on the biological pathways for N2O production and consumption, as well as the critical process factors affecting N2O emission. It also highlights the importance of research needs and the promising recovery options for waste gas.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Mervenur Kilic, Tulay Yilmaz, Recep Partal, Emrah Sik, Ozgur Dogan, Mehmet Kitis, Erkan Sahinkaya
Summary: This study investigated nutrient recovery through struvite precipitation from anaerobic digester supernatant with high concentrations of nitrogen and phosphorus using a fluidized-bed reactor. The results showed that struvite could be successfully precipitated at high performances even with a hydraulic retention time (HRT) of 2.5 minutes and molar Mg2+/NH4+/PO4 3- ratio of 1.5/16.6/1. The highest NH4-N and PO4-P precipitation performances were achieved at an Mg/P molar ratio of 2. Furthermore, volatile fatty acid presence did not adversely affect the struvite precipitation performance.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Salman Amjad, Morten Lykkegaard Christensen, Kasper Reitzel, Haiyan Qu
Summary: This study investigated the recovery of phosphorus through crystallization of vivianite in digester supernatant. It was found that vivianite achieved a high recovery yield even in digester supernatant with low phosphorus concentration. Various strategies were tested to obtain vivianite crystals with large sizes and narrow size distribution.
CHEMICAL ENGINEERING & TECHNOLOGY
(2023)
Article
Environmental Sciences
Junkai Zhao, Jianqiang Zhao, Wenjuan Yang, Bo Hu, Ting Huang, Shuting Xie, Shuhan Lei, Wei Hou
Summary: This study analyzed the impact of hydroxylamine (NH2OH) on the production of NO and N2O by nitrifying bacteria in activated sludge reactors. The results showed that the presence of NH2OH was positively correlated with dissolved oxygen levels and led to an imbalance in NH4+ oxidation, resulting in increased NO and N2O production under high DO conditions. Furthermore, the coexistence of NO2- and NH2OH in the reactor contributed to a significant generation of NO and N2O through both biotic/abiotic hybrid pathways and heterotrophic denitrification pathway.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Biotechnology & Applied Microbiology
Ching-Lun Su, Sai Hung Lau, Hsiang-Yuan Yeh, Yi-Tang Chang
Summary: This study aims to investigate the removal of benzophenone-n (BPs) and the production and functions of extracellular polymeric substances (EPS) in a laboratory-scale SBR under different hydraulic retention time (HRT) and operating stages. The results showed that increasing the HRT from 8 to 48 hours significantly improved the removal of BPs, and the reaction stage (aerobic condition) was the most effective. The protein content of EPS increased with HRT, while polysaccharides showed no relationship. The dominant strains varied with different HRTs but were similar at different stages according to the next-generation sequencing (NGS) results.
INTERNATIONAL BIODETERIORATION & BIODEGRADATION
(2023)
Article
Environmental Sciences
Ruoyu Li, Zhangliang Han, Hanzhang Shen, Fei Qi, Mengmeng Ding, Cheng Song, Dezhi Sun
Summary: Higher ambient temperatures and aeration significantly contribute to VSC emissions, with H2S and MT being the dominant odors released.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Wo Bin Bae, Yongeun Park, Kartik Chandran, Jingyeong Shin, Sung Bong Kang, Jinhua Wang, Young Mo Kim
Summary: The major triggers of nitrous oxide (N2O) production in a full-scale wastewater treatment plant were investigated based on seasonal monitoring and analysis, revealing that N2O emissions during nitrification were related to nitrite accumulation, temperature, ammonia loading rate, and the specific oxygen uptake rate ratio between ammonia oxidizing bacteria and nitrite oxidizing bacteria (SOUR-ratio). The study found that a higher sOUR-ratio was associated with a higher N2O production rate, while a lower sOUR-ratio correlated with a lower N2O production rate.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Environmental Sciences
Adarsh Singh, Ashish Srivastava, Duduku Saidulu, Ashok Kumar Gupta
Summary: Industrial wastewater treatment is crucial to meet discharge regulations. The sequencing batch reactor (SBR), known for its low cost and high efficiency, is widely used for treating industrial wastewater. This review explores the feasibility of SBR in treating wastewater from various industries and discusses factors affecting its treatment efficacy, as well as innovative modifications and combinations with other advanced technologies.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Engineering, Environmental
Krzysztof Piaskowski, Renata Swiderska-Dabrowska, Tomasz Dabrowski
Summary: The variability of the sedimentation characteristics of activated sludge in biological wastewater treatment plants can be improved by the application of polyelectrolytes. The type and dose of polyelectrolyte used can affect both the morphology of sludge flocs and the quality of the treated wastewater. This study investigates the effect of dosing two different cationic polyelectrolytes on activated sludge and treated wastewater parameters in lab-scale sequencing batch reactors (SBRs).
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Multidisciplinary
Alaa H. Khalaf, W. A. Ibrahim, Mai Fayed, M. G. Eloffy
Summary: The study investigated the effect of operating conditions on two methods used for dairy wastewater treatment - conventional activated sludge and conventional sequencing batch reactor. The addition of plastic media was also studied, resulting in biofilm systems. Results showed that the optimum temperature for removal efficiency was 35 degrees C. The SBR method was determined to be the most effective treatment method for dairy wastewater based on the investigated conditions.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Lokesh Kumar Akula, Vidyasagar Babu Gaddam, Madhuri Damaraju, Debraj Bhattacharyya, Kiran Kumar Kurilla
Summary: The study investigated the effectiveness of a sequenced biological-physicochemical reactor system in treating sewage. Achieving high removal rates of COD, DOC, TN, and TP, as well as significant reduction of micropollutants, the coupled SBR-ECR system offers a more compact footprint compared to conventional biological treatment systems. However, further disinfection treatment is recommended for safe reuse of the treated water due to the presence of coliforms in the outlet samples.
WATER ENVIRONMENT RESEARCH
(2021)
Article
Engineering, Environmental
Lisheng Wang, Xiaofeng Kang, Yanchen Liu, Xia Huang
Summary: Stable partial nitrification was achieved in MABR using control strategies based on free ammonia (FA) and free nitrous acid (FNA), with low FA concentrations suppressing nitrite oxidizing bacteria (NOB) and FNA stabilizing partial nitrification by eliminating NOB.
Article
Biotechnology & Applied Microbiology
Alfonso Garcia, Edgardo Valenzuela, Alejandro Vargas, Ignacio de Godos, Raul Munoz, Meng Wang, Miguel Vital-Jacome, Guillermo Quijano
Summary: A photo-sequencing batch bioreactor (PSBR) was used to treat medium- and low-strength wastewaters, achieving a high removal efficiency of chemical oxygen demand. However, photoinhibition of nitrifying activity occurred under high irradiance conditions. A short settling time promoted the rapid formation of microalgal-bacterial aggregates (MABAs), and simulation of light penetration profiles proved to be a useful tool for identifying photoinhibition of nitrifying activity.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2023)
Article
Computer Science, Interdisciplinary Applications
Jenifer Benavides Sanchez, Marianna Vuono, Davide Dionisi
Summary: This study compared the performance of CAS and SBR processes in treating wastewater with different substrate compositions through mathematical modeling, finding that under certain conditions, SBR can remove COD and ammonia nitrogen from wastewater more effectively than CAS.
COMPUTERS & CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
B. Song, Z. Tian, R. D. van der Weijden, C. J. N. Buisman, J. Weijma
Summary: A high-rate process for biological selenate reduction to elemental selenium was developed, showing high selectivity and conversion efficiency, which may serve as the basis for a high-rate technology to remove and recover pure selenium from wastewater or process streams with high selectivity.
Article
Engineering, Environmental
Salar Haghighatafshar, Elin Ossiansson, Konrad Koch, Hamse Kjerstadius, Jes la Cour Jansen, Asa Davidsson
WATER ENVIRONMENT RESEARCH
(2015)
Article
Environmental Sciences
Tobias Hey, Janne Vaananen, Nicolas Heinen, Jes la Cour Jansen, Karin Jonsson
ENVIRONMENTAL TECHNOLOGY
(2017)
Article
Environmental Sciences
Tobias Hey, Agata Zarebska, Niada Bajraktari, Jorg Vogel, Claus Helix-Nielsen, Jes la Cour Jansen, Karin Jonsson
ENVIRONMENTAL TECHNOLOGY
(2017)
Article
Environmental Sciences
Salar Haghighatafshar, Britt-Marie Wilen, Andreas Thunberg, Marinette Hagman, Annika Nyberg, Jonas Grundestam, Maria Mases, Jes la Cour Jansen
ENVIRONMENTAL TECHNOLOGY
(2017)
Article
Environmental Sciences
Tobias Hey, Niada Bajraktari, Jorg Vogel, Claus Helix Nielsen, Jes la Cour Jansen, Karin Jonsson
ENVIRONMENTAL TECHNOLOGY
(2017)
Review
Green & Sustainable Science & Technology
Anna Bernstad Saraiva Schott, Henrik Wenzel, Jes la Cour Jansen
JOURNAL OF CLEANER PRODUCTION
(2016)
Article
Engineering, Environmental
Hamse Kjerstadius, Jo de Vrieze, Jes la Cour Jansen, Asa Davidsson
Article
Engineering, Environmental
F. Stenstrom, J. la Cour Jansen
WATER SCIENCE AND TECHNOLOGY
(2016)
Article
Engineering, Environmental
J. Vaananen, M. Cimbritz, J. la Cour Jansen
WATER SCIENCE AND TECHNOLOGY
(2016)
Article
Environmental Sciences
Tobias Hey, Niada Bajraktari, Asa Davidsson, Jorg Vogel, Henrik Taekker Madsen, Claus Helix-Nielsen, Jes la Cour Jansen, Karin Jonsson
ENVIRONMENTAL TECHNOLOGY
(2018)
Article
Engineering, Environmental
J. Vaananen, S. Memet, T. Gunther, M. Lilja, M. Cimbritz, J. la Cour Jansen
WATER SCIENCE AND TECHNOLOGY
(2017)
Article
Engineering, Environmental
F. Stenstrom, J. la Cour Jansen
WATER SCIENCE AND TECHNOLOGY
(2017)
Article
Environmental Sciences
Salar Haghighatafshar, Beatrice Nordlof, Maria Roldin, Lars-Goran Gustafsson, Jes la Cour Jansen, Karin Jonsson
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2018)
Article
Water Resources
F. Nilsson, M. Ekblad, J. la Cour Jansen, K. Jonsson
WATER PRACTICE AND TECHNOLOGY
(2017)
Article
Engineering, Environmental
H. El-taliawy, M. Ekblad, F. Nilsson, M. Hagman, N. Paxeus, K. Jonsson, M. Cimbritz, J. la Cour Jansen, K. Bester
CHEMICAL ENGINEERING JOURNAL
(2017)