Electricity generation through a photo sediment microbial fuel cell using algae at the cathode

Neethu, B.; Ghangrekar, Makarand M.

doi:10.2166/wst.2017.485

Cited by 52 publications

(12 citation statements)

References 24 publications

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“…The high value of toxic metals removal in the open SMFCs than closed SMFCs was due to the rapid reduction of oxygen in the cathode chamber. It’s also depend on the type of microorganisms, sediment residence time hydraulic residence time (Neethu and Ghangrekar, 2017).…”

Section: Discussionmentioning

confidence: 99%

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

et al. 2019

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The industrial contamination of marine sediments with mercury, silver, and zinc in Penang, Malaysia was studied with bio-remediation coupled with power generation using membrane less open (aerated) and closed (non-aerated) sediment microbial fuel cells (SMFCs). The prototype for this SMFC is very similar to a natural aquatic environment because it is not stimulated externally and an oxygen sparger is inserted in the cathode chamber to create the aerobic environment in the open SMFC and no oxygen supplied in the closed SMFC. The open and closed SMFCs were showed the maximum voltage generation 300.5 mV (77.75 mW/m2) and 202.7 mV (45.04 (mW/m2), respectively. The cyclic voltammetry showed the oxidation peak in open SMFCs at +1.9 μA and reduction peak at -0.3 μA but in closed SMFCs oxidation and reduction peaks were noted at +1.5 μA and -1.0 μA, respectively. The overall impedance (anode, cathode and solution) of closed SMFCs was higher than open SMFCs. The charge transfer impedance showed that the rates of substrate oxidation and reduction were very low in the closed SMFCs than open SMFCs. The Nyquist arc indicated that O2 act as electron acceptor in the open SMFCs and CO2 in the closed SMFCs. The highest remediation efficiency of toxic metals [Hg (II) ions, Zn (II) ions, and Ag (I) ions] in the open SMFCs were 95.03%, 86.69%, and 83.65% in closed SMFCs were 69.53%, 66.57%, and 65.33%, respectively, observed during 60–80 days. The scanning electron microscope and 16S rRNA analysis showed diverse exoelectrogenic community in the open SMFCs and closed SMFCs. The results demonstrated that open SMFCs could be employed for the power generation and bioremediation of pollutants.

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Section: Discussionmentioning

confidence: 99%

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

et al. 2019

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“…For this reason, several recent studies like refs. [38,194,195], and [196] have explored on new materials and better methods of modification of the existing electrodes to improve the quality of the results achieved from microbial fuel cells. Several other studies like refs.…”

Section: Methodsmentioning

confidence: 99%

“…With that being said, recent studies such as refs. [196,194], and [38] have shown the use of much more efficient and inexpensive alternatives to these electrodes and electrolytes that have been conventionally used for a long time.…”

Section: Methodsmentioning

confidence: 99%

Wastewater treatment and energy production by microbial fuel cells

Siddiqui

Bhatnagar

Dhingra

et al. 2021

Biomass Conv. Bioref.

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The increasing demands of efficient and sustainable energy generation methods from waste products have taken a giant leap in the last century, and especially in the previous two decades. Wastewater treatment has also been a much-researched topic in recent years owing to the exponential increase in effluent-laden wastewater from industries, the agricultural sector and food sector, and its effects on the environment. There have been plenty of wastewater treatment techniques over the years, but most of them lack in terms of cost-effectiveness, durability, and energy recovery rates. Microbial fuel cells can prove to be of great use to tackle both of these issues in one go, as they perform bioelectrochemical processes on organic biodegradable compounds to oxidize them to generate power which can be harnessed by various means. This article explains the aim, construction, mechanism, and application of microbial fuel cells; the economic and scientific challenges that they face in the future; and microbial fuel cell (MFC) hybrid systems which make use of MFCs combined with other useful technologies for greater aims and better efficiencies. It overall discusses the various ways in which MFCs outperform other wastewater treatment technologies by significantly decreasing sludge production and being environment-friendly, and also some limitations and drawbacks that MFCs face owing to the fact that they are relatively newer technologies and still require decades of modifications until they reach excellent output rates. MFCs are known not only for wastewater treatment but also for contaminant removal, heavy metal removal, biohydrogen production, applications in biosensors, etc., as also discussed in this article.

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“…In the recent era, METs have been extensively researched for their incredible potential to generate green energy and valuables with the concomitant treatment of wastewater (Neethu and Ghangrekar, 2017;Vinayak et al, 2021). Generally, in different kinds of METs, electroactive microorganisms formally known as exoelectrogens consume organic matter present in the wastewater as a substrate for their cell growth and eliminate contaminants with simultaneous generation of bioelectricity (Jatoi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…In microbial fuel cell (MFC), exoelectrogens, the green biocatalysts, degrade organic components from wastewater used as fuel for their cellular mechanism, and release CO 2 , protons, and electrons in the anodic chamber (Neethu and Ghangrekar, 2017;Vinayak et al, 2021). Furthermore, the protons are transferred toward the cathode via the proton exchange membrane (PEM).…”

Section: Introductionmentioning

confidence: 99%

A Sustainable Approach for the Production of Green Energy With the Holistic Treatment of Wastewater Through Microbial Electrochemical Technologies: A Review

2021

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With the plausible depletion of fossil fuels in the near future and its associated environmental impacts, researchers have instigated the search for eco-friendly renewable bioenergy. Moreover, the increase in water pollution by industrial and anthropogenic activities is another alarming global concern. In this regard, the production of renewable and sustainable green bioenergy utilizing wastewater through microbial electrochemical technologies (METs) can alleviate these crucial problems by providing a sustainable solution to meet both the demands of energy and fresh water supply. Moreover, different bio-centered techniques such as nitrification and denitrification for nitrogen removal, and elimination of carcinogenic metals, pathogens, and organic components utilizing microbiota followed by toxicity sensing of different pollutants have been efficaciously exhibited through METs. However, inferior bioenergy production and recovery of low biomass yield in METs with high operational cost are noteworthy bottlenecks that hinder the scalability of this technology. Therefore, this review elaborates different physicochemical factors affecting the performance of METs, microbial interaction for the development of stable biofilm and so forth. Moreover, a broad overview on the production of bioenergy, along with the removal of pollutants from wastewater through different types of METs are also highlighted. Furthermore, the production of biofuels like ethanol, methanol, biodiesel, and gaseous fuel like bio-H2 coupled with power generation using photosynthetic microorganisms via CO2 sequestration through METs are also discussed. Additionally, recent developments with future scope for the field-scale implementation of METs along with their bottlenecks have been discussed, which has not been critically reviewed to date.

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Electricity generation through a photo sediment microbial fuel cell using algae at the cathode

Cited by 52 publications

References 24 publications

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

Bioremediation and Electricity Generation by Using Open and Closed Sediment Microbial Fuel Cells

Wastewater treatment and energy production by microbial fuel cells

A Sustainable Approach for the Production of Green Energy With the Holistic Treatment of Wastewater Through Microbial Electrochemical Technologies: A Review

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