Article
Energy & Fuels
Sajjad Malboosi, Seyed Majid Hashemian, Mahmood Chahartaghi
Summary: The sludge produced in wastewater treatment plants can be used as renewable energy, and the difference between physical and chemical exergy in WWTPs in southern Tehran is insignificant. Research on six other treatment plants shows that the larger the capacity of the treatment plant, the smaller the share of consumable work exergy compared to the exergy of incoming wastewater.
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2021)
Review
Engineering, Environmental
Jia Li, Zhiwei Wang, Yayi Wang
Summary: Membrane aerated biofilm reactors (MABRs) are an energy-efficient technology for biological nitrogen removal (BNR), which can bring wastewater treatment plants (WWTPs) closer to carbon neutrality. MABRs use gas-permeable hydrophobic membranes to supply oxygen and serve as carriers for biofilm attachment. This review summarizes the characteristics and advantages of MABRs, as well as their application in coupling with novel BNR processes. It also discusses the potential of MABRs in upgrading existing WWTPs and the integration of PN/A process into MABRs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
A. Pascual, J. A. Alvarez, D. de la Varga, C. A. Arias, D. Van Oirschot, R. Kilian, M. Soto
Summary: The influence of bed depth on the performance of aerated horizontal constructed wetlands was investigated at the pilot plant scale. The results showed that a larger bed depth and artificial aeration can improve the loading rate and the removal efficiency of organic matter and nitrogen in the horizontal constructed wetlands.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Agricultural Engineering
Anna Christine Trego, B. Conall Holohan, Ciara Keating, Alison Graham, Sandra O'Connor, Michael Gerardo, Dermot Hughes, Umer Zeeshan Ijaz, Vincent O'Flaherty
Summary: This study demonstrates the feasibility of high-rate, direct treatment of low-strength municipal wastewater at low temperatures for the first time. Efficient removal of BOD from wastewater and the discovery of a highly adaptable core microbiome provide a foundation for next-generation municipal wastewater treatment.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Anissa Sukma Safitri, Krista Michelle Kaster, Roald Kommedal
Summary: This study investigated the production of biogas and removal of municipal wastewater COD at low temperatures using granulated anaerobic biomass. The results showed that stable COD removal and methane production could be achieved at higher temperatures, and temperature did not significantly affect the methane production rate and yield. COD removal and methane yields decreased at lower temperatures, but significant methane formation was still observed.
BIORESOURCE TECHNOLOGY
(2022)
Article
Environmental Sciences
A. Plevri, D. Mamais, C. Noutsopoulos
Summary: This study investigates the efficiency of Anaerobic Membrane Bioreactor (AnMBR) under different temperatures and operating conditions, finding that as the hydraulic retention time decreases, effluent quality decreases and membrane fouling occurs more rapidly.
Article
Environmental Sciences
Daniele Cecconet, Matia Mainardis, Arianna Callegari, Andrea G. Capodaglio
Summary: According to new paradigms of urban wastewater management, energy savings and resources recovery from sewage will be increasingly important. Anaerobic processes are more energy efficient than conventional aerobic ones and are suitable for recovering embedded organic energy. The study operated a pilot UASB reactor at low temperatures to treat municipal wastewater and evaluated its performance and economic benefits.
Article
Biochemistry & Molecular Biology
Yerkanat N. Kanafin, Dinara Kanafina, Simos Malamis, Evina Katsou, Vassilis J. Inglezakis, Stavros G. Poulopoulos, Elizabeth Arkhangelsky
Summary: The anaerobic membrane bioreactor (AnMBR) is a promising alternative for municipal wastewater treatment, offering advantages such as reduced sludge production and biogas generation. However, there are still challenges to be addressed, indicating the need for further research and development in this area.
Article
Engineering, Environmental
Xue Deng, Chengyuan Su, Xiaoen Luo, Xiaoyue Liu, Zhu Liang, Fengxiu Ding, Wenjing Yang, Yufeng Xu, Menglin Chen
Summary: This study investigated the start-up process, microbial communities, and metagenomic features of a micro-aerated anaerobic reactor for sulfate wastewater treatment. The results showed that the reactor achieved high removal rates of COD, SO42-, and NH4+-N under appropriate COD/SO42- ratio. The study also analyzed the variations in the activities of key enzymes and microbial species in the sludge, providing valuable insights for the optimization of micro-aerated anaerobic reactors.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Santo Fabio Corsino, Michele Torregrossa
Summary: The study found that MABR outperformed the CAS system in the removal of TSS, COD, and total nitrogen, as well as achieving complete nitrification at a shorter SRT. Additionally, the biofilm detachment in MABR had a positive effect on the settling properties of the suspended biomass.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
Harish Ravishankar, Andras Nemeth, Gerard Massons, David Puig, David Zardoya, Natalia Carpi, Piet N. L. Lens, Barry Heffernan
Summary: Simultaneous nitrification and denitrification was achieved in an MABR system treating municipal sewage. The availability of soluble biodegradable COD and the ratio of oxygen supply to demand were found to be critical factors for effective denitrification.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Bin Ji, Lin Zhu, Shulian Wang, Yu Liu
Summary: The study found that high temperatures favored organic removal, with most of the ammonia-N being removed through microbial assimilation by microalgae and bacteria, and high efficiency of phosphorus removal. The contributions of microalgal and bacterial assimilations towards COD, ammonia and P removal appeared to be temperature-dependent.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Review
Nanoscience & Nanotechnology
Yongrong Shen, Pingping Sun, Liang Ye, Dong Xu
Summary: This review discusses the research progress and challenges of Anaerobic Membrane Bioreactor (AnMBR) in municipal wastewater treatment, including technical characteristics, membrane fouling, and low-temperature operation. The paper provides solutions and prospects for the development of AnMBR in treating low-concentration municipal sewage and realizing resource and energy reuse.
SCIENCE OF ADVANCED MATERIALS
(2023)
Article
Environmental Sciences
Xiao Zhang, Bowei Zhao, Rui Li, Ying Cui, Fei Xie, Aijuan Zhou, Jinping Li, Xiuping Yue
Summary: The influence of hydraulic retention time (HRT) on the granulation process, methane-producing capacity, microbial community structure, and pollutant removal efficiency of an up-flow anaerobic sludge blanket (UASB) with simulated municipal wastewater was investigated. The results showed that even at low COD concentrations, the proportion of granular sludge in the UASB was high, and the COD removal efficiency was good. Shortening the HRT resulted in dense granular sludge and reduced the load of subsequent treatment processes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Yuanqin Gao, Hao Cheng, Bingcai Xiong, Hongxia Du, Lei Liu, Tadayuki Imanaka, Yasuo Igarashi, Ming Ma, Dinyong Wang, Feng Luo
Summary: This study investigated the biogeochemical transformation and environmental characteristics of mercury (Hg) in anaerobic digestion (AD) of municipal wastewater, as well as the variations of dominant microbes. The results showed that Hg(II) methylation is dominant in the early stage of AD, while methylmercury (MeHg) demethylation dominates in the later stage. Sulfate significantly inhibits MeHg formation and Hg(II) methylation by microbes. Microbial community analysis revealed that certain strains may be directly related to Hg(II) methylation and MeHg demethylation. Overall, this research provides insights into the biogeochemical transformation of Hg in AD, contributing to the scientific treatment of municipal wastewater and reducing the risk of MeHg to human beings.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
