Low-power energy harvester from constructed wetland-microbial fuel cells for initiating a self-sustainable treatment process

Srivastava, Pratiksha; Belford, Andrew; Asadnia, Mohsen; Garaniya, Vikram; Yadav, Asheesh Kumar

doi:10.1016/j.seta.2021.101282

Cited by 16 publications

(8 citation statements)

References 42 publications

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“…Finally, Cluster #14 (2007-2021) emerged late, and researchers gradually realised the usefulness of CWs for wastewater treatment [72]. Although the cluster is also interested in CW dynamics and nitrogen-removal effectiveness, at the later stage of the investigation, the cluster innovated and adapted CWs to the type of wastewater and the location of application (for instance, the innovative wall-cascade constructed-wetland (WCCW) system for the treatment of grey water in urban environments, and the automated CW-microbial fuel cell (MFC) power-management system (PMS) [73,74]).…”

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confidence: 99%

Knowledge Atlas on the Relationship between Water Management and Constructed Wetlands—A Bibliometric Analysis Based on CiteSpace

et al. 2022

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Water management is a crucial resource conservation challenge that mankind faces, and encouraging the creation of manmade wetlands with the goal of achieving long-term water management is the key to long-term urban development. To summarise and analyse the status of the research on the relationship between water management and constructed wetlands, this paper makes use of the advantages of the bibliometric visualization of CiteSpace to generate country/region maps and author-collaboration maps, and to analyse research hotspots and research dynamics by using keywords and literature co-citations based on 1248 pieces of related literature in the core collection in the Web of Science (WoS) database. The existing research shows that the research content and methods in the field of constructed-wetland and water-management research are constantly being enriched and deepened, including the research methods frequently used in constructed wetlands in water management and in the research content under concern, the functions and roles of constructed wetlands, the relevant measurement indicators of the purification impact of constructed wetlands on water bodies, and the types of water bodies treated by constructed wetlands in water management. We summarise the impact pathways of constructed wetlands on water management, as well as the impact factors of constructed wetlands under water-management objectives, by analysing the future concerns in the research field to provide references for research.

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confidence: 99%

Knowledge Atlas on the Relationship between Water Management and Constructed Wetlands—A Bibliometric Analysis Based on CiteSpace

et al. 2022

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“…The low current levels powered by CW-MFCs did not impact the degradation products but did increase the rate of SMX removal [134]. Another study was conducted by Srivastava et al [135], which explored the use of a power management system (PMS) to store the power output of EWs and boost voltage to power a small air pump for providing oxygen in the cathode area of the EW system. With intermittent aeration, the maximum power generation by one of the EW increased from 54.6 µW to 90 µW, and ammonium removal increased by 10% [135].…”

Section: Power Supply Via Ewmentioning

confidence: 99%

“…The system could capture and store the unstable and limited power output from MFCs/EWs and boost voltage to a relatively higher and constant level in a certain range [116,138], and subsequently prevent voltage reversal occurring in stacked MFCs/EWs during long-time reactions [138]. The system usually consists of a harvesting system, including maximum power point (MPP) tracking and an energy storage unit by means of supercapacitors [135]. It is different from external resistors, which only show energy output potential but do not capture usable energy, as the current flowing through the resistor is lost as heat [137,138].…”

Section: Unilizaiton Of Power Management Systems In Ecmentioning

confidence: 99%

“…This study is the first to use PMS to harvest energy in EW systems, which have not previously dealt with the application of energy from EW. Srivastava et al [135] unitized a PMS with two supercapacitors (55 F) to harvest and boost voltage from EWs, and to power a small air pump to provide oxygen to the cathode area in EWs. With the connection of PMS, the voltage of EWs (394 ± 53 mV and 307 ± 34 mV) was boosted to 1.7 V to power the air pump.…”

Section: Unilizaiton Of Power Management Systems In Ecmentioning

confidence: 99%

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Examining Current and Future Applications of Electrocoagulation in Wastewater Treatment

Mao

Zhao

Cotterill

2023

Water

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Electrocoagulation (EC) has gained increasing attention as an effective and environmentally friendly technique for purifying water and wastewater. This review provides a comprehensive analysis of the recent literature on EC and identifies new trends and potentials for further research. Initially, the nature of EC and its operating parameters are discussed, while the research trends are analyzed using the Scopus database and VOSviewer software. From 1977 to 2022, 2691 research articles and review papers on EC for water/wastewater treatment were published, with the number of publications increasing from 2 in 1977 to 293 in 2022. In the past five years, most studies focused on treatment performance and the mechanism of EC systems. However, recent emphasis has been placed on combining EC with other treatment processes and addressing emerging pollutants. The innovative applications of EC are highlighted, including the removal of microplastics and per/polyfluoroalkyl substances, the power supply of EC via microbial fuel cells (MFCs) and electro-wetlands (EWs), and the application of power management systems in EC. The review concludes with suggestions for further research to enhance the technology and expand its scope of applications.

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“…CWs have been used in sewage treatment throughout Europe and the United States in recent decades. [7][8][9][10] In the past couple of decades, CW is considered an eco-friendly wastewater treatment technology by simulating natural wetlands. It has been demonstrated to be an efficient alternative to conventional wastewater treatment techniques due to its lower costs, reduced operating and maintenance costs, and low reliance on energy inputs.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of different macrophytes in small‐scale vertical flow constructed wetlands for greywater treatment using principal component analysis

et al. 2022

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The scarcity of water is perceived as a systematic global risk due to increasing water demand. Vertical flow constructed wetland (VFCW) is proposed as an energetically efficient and economical process to treat greywater (GW) for non‐potable purposes. Macrophyte contributes a significant amount to the treatment process, and it depends on species, and their ecology. In this study, four single‐stage VFCW systems were planted with locally available plant species named Hymenocallis littoralis as Plant 1, Phragmites australis as Plant 2, Canna indica Plant as 3, and Colocasia as Plant 4, which were used for the treatment of GW. The mean removal efficiencies associated with Plant 1, Plant 2, Plant 3, and Plant 4 are 55.13%, 48.11%, 52.53%, and 56.39% for chemical oxygen demand (COD); 45.35%, 35.36%, 64.10%, and 56.39% for ammonia; and 32.97%, 20.85%, 71.57%, and 33.40% for phosphate, respectively. All systems show significant removal efficiency (more than 40%) of all pollutants, except TDS and pH. Among all the observed plants, C. indica achieved the highest removal efficiency for COD, ammonia, and phosphate. The obtained results were analyzed for the dependency of correlations with effluent, influent, and macrophytes used in the treatment system. The principal component analysis (PCA) identified two principal components from 13 variables and explained 50.25%, 47.47%, and 45.62% variance of normalized datasets in VFCW. The PCA also shows significant correlations of plant species with different targeted effluent parameters.

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Low-power energy harvester from constructed wetland-microbial fuel cells for initiating a self-sustainable treatment process

Cited by 16 publications

References 42 publications

Knowledge Atlas on the Relationship between Water Management and Constructed Wetlands—A Bibliometric Analysis Based on CiteSpace

Knowledge Atlas on the Relationship between Water Management and Constructed Wetlands—A Bibliometric Analysis Based on CiteSpace

Examining Current and Future Applications of Electrocoagulation in Wastewater Treatment

Performance evaluation of different macrophytes in small‐scale vertical flow constructed wetlands for greywater treatment using principal component analysis

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