Performance and toxicity assessment of an up-flow tubular microbial fuel cell during long-term operation with high-strength dairy wastewater

Marassi, Rodrigo José; Queiroz, Lucas Gonçalves; Silva, Daniel Clemente V.R.; Silva, Flávio Teixeira da; Silva, Gilmar Clemente; Paiva, Teresa Cristina Brazil de

doi:10.1016/j.jclepro.2020.120882

Cited by 58 publications

(16 citation statements)

References 33 publications

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“…The discharge of pollutants from industrial processes causes adverse environmental impacts on aquatic ecosystems, such as eutrophication of water bodies, the introduction of pathogens, re-assembling of the microbial community structure in rivers 42 , 43 . This paper revealed that raw sewage remarkably contributed to the enrichment of pathogens in sediment samples of the river.…”

Section: Discussionmentioning

confidence: 99%

Insight into impact of sewage discharge on microbial dynamics and pathogenicity in river ecosystem

Xie

Liu

Wei

et al. 2022

Sci Rep

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Direct sewage discharge could cause copious numbers of serious and irreversible harm to the environment. This study investigated the impacts of treated and raw sewage on the river ecosystem. Through our analysis, sewage carried various nutrients into the river, leading to changes in the microbial community in the river and reducing the diversity and richness of bacteria. The relative abundances of Hydrogenophaga, Thauera, Planctomyces, Zoogloea, and Pseudomonas boosted from 0.25, 0.01, 0.00, 0.05, and 0.08% to 3.33, 3.43, 0.02, 6.28, and 2.69%, before and after raw sewage discharge, respectively. The gene abundance of pathogenic bacteria significantly increased after raw sewage discharge. For instance, the gene abundance of Vibrio, Helicobacter, Tuberculosis, and Staphylococcus augmented from 4055, 3797, 13,545, 33 reads at Site-1 to 23,556, 13,163, 19,887, 734 reads at Site-2, respectively. In addition, according to the redundancy analysis (RDA), the infectious pathogens were positively related to the environmental parameters, in which COD showed the highest positive correlation with Mycobacterium tuberculosis. Additionally, river self-purification may contribute to improving water quality and reducing pathogenicity. The outcomes of this study showed that direct discharge brought pathogens and changed microbial community structure of the river.

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Section: Discussionmentioning

confidence: 99%

Insight into impact of sewage discharge on microbial dynamics and pathogenicity in river ecosystem

Xie

Liu

Wei

et al. 2022

Sci Rep

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“…In addition, synthesized PU was water-based polyurethane [53] with a similar function to polytetrafluoroethylene (PTFE) [44,54,55] as a waterproofing material and increasing the oxygen reduction reaction (ORR) on the surface of the cathode material. The wiring system, called closed-circuit voltage (CCV) [56,57], connected the anode-equipped 100 Ω of resistor onto the data logger and cathode in a line. In general, the reactor is described in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Enhancement of Power Generation and Organic Removal in Double Anode Chamber Designed Dual-Chamber Microbial Fuel Cell (DAC-DCMFC)

Samudro

Imai

Hung

2021

Water

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One of the important factors in enhancing the performance of microbial fuel cells (MFCs) is reactor design and configuration. Therefore, this study was conducted to evaluate the regressors and their operating parameters affecting the double anode chamber–designed dual-chamber microbial fuel cell (DAC-DCMFC) performance. Its primary design consists of two anode chamber compartments equipped with a separator and cathode chamber. The DAC-DCMFCs were parallelly operated over 8 days (60 days after the acclimation period). They were intermittently pump-fed with the different organic loading rates (OLRs), using chemically enriched sucrose as artificial wastewater. The applied OLRs were adjusted at low, medium, and high ranges from 0.4 kg.m−3.d−1 to 2.5 kg.m−3.d−1. The reactor types were type 1 and type 2 with different cathode materials. The pH, temperature, oxidation-reduction potential (ORP), optical density 600 (OD600), chemical oxygen demand (COD), and total organic carbon (TOC) were measured, using standard analytical instruments. In general, the power production achieved a maximum of 866 ± 44 mW/m2, with a volumetric power density of 5.15 ± 0.26 W/m3 and coulombic efficiency of 84%. Two-stage COD and TOC removal at medium OLR achieved a range of 60–80%. Medium OLR is the recommended level to enhance power production and organic removal in DAC-DCMFC. The separated anode chambers into two parts in a dual anode chamber microbial fuel cell adjusted by various organic loadings expressed a preferable comprehension in the integrated MFCs for wastewater treatment.

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“…Since increase in biodegradable organic pollutants is an increase in the BOD, therefore, most biological treatment processes such as microalgae or microbial fuel cell technique can remove the BOD content in wastewater. Zhang et al [26], indicated a 98.6% BOD removal using MFC while Marassi et al [27] reported a 96-97% efficiency using a tubular MFC. The use of microalgae has also been reported to have effectively reduce the BOD content of wastewater by generation of O 2 during photosynthesis [28] and 87% removal efficiency [29].…”

Section: Biochemical Oxygen Demand (Bod)mentioning

confidence: 99%

Emerging Trends in Wastewater Treatment Technologies: The Current Perspective

Armah¹,

Chetty²,

Adedeji³

et al. 2021

Promising Techniques for Wastewater Treatment and Water Quality Assessment

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The quality of freshwater and its supply, particularly for domestic and industrial purposes are waning due to urbanization and inefficient conventional wastewater treatment (WWT) processes. For decades, conventional WWT processes have succeeded to some extent in treating effluents to meet standard discharge requirements. However, improvements in WWT are necessary to render treated wastewater for re-use in the industrial, agricultural, and domestic sectors. Three emerging technologies including membrane technology, microbial fuel cells and microalgae, as well as WWT strategies are discussed in this chapter. These applications are a promising alternative for manifold WWT processes and distribution systems in mitigating contaminants to meet acceptable limitations. The basic principles, types and applications, merits, and demerits of the aforementioned technologies are addressed in relation to their current limitations and future research needs. The development in WWT blueprints will augment the application of these emerging technologies for sustainable management and water conservation, with re-use strategies.

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Performance and toxicity assessment of an up-flow tubular microbial fuel cell during long-term operation with high-strength dairy wastewater

Cited by 58 publications

References 33 publications

Insight into impact of sewage discharge on microbial dynamics and pathogenicity in river ecosystem

Insight into impact of sewage discharge on microbial dynamics and pathogenicity in river ecosystem

Enhancement of Power Generation and Organic Removal in Double Anode Chamber Designed Dual-Chamber Microbial Fuel Cell (DAC-DCMFC)

Emerging Trends in Wastewater Treatment Technologies: The Current Perspective

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