Effective Treatment of Acid Mine Drainage with Microbial Fuel Cells: An Emphasis on Typical Energy Substrates

Ai, Chenbing; Zhang, Yan; Hou, Shanshan; Zheng, Xiaoya; Zeng, Zichao; Amanze, Charles; Dai, Zhimin; Chai, Liyuan; Qiu, Guanzhou; Zeng, Weimin

doi:10.3390/min10050443

Cited by 32 publications

(8 citation statements)

References 51 publications

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“…61 Bacteriovorax is a Gram-negative, aerobic, and obligate predator of Gram-negative bacteria 62 and Flavobacterium is an aerobic denitrifier. 63 In addition, it was worth mentioning that unclassif ied_f__Enterobacteriaceae, a kind of heterotrophic denitrifying bacterium, 64 was found to be predominant in glucose-fed microbial fuel cells; 65 hence, aerobic denitrifying bacteria involved in electrostatic interactions have more potential possibility to colonize the habitat faster.…”

Section: Methodsmentioning

confidence: 99%

Revisiting the Microscopic Processes of Biofilm Formation on Organic Carriers: A Study under Variational Shear Stresses

Fan

Zhu

Zhang

et al. 2021

ACS Appl. Bio Mater.

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The microscopic process of biofilm development on carriers is critical for interfacial regulation of biofilms in attached-growth wastewater treatment. However, the process under shear stress has not been well understood. The study purposed to revisit the processes of biofilm formation on organic carriers under different shear stresses with special highlights on bacterial reversible adhesion and pioneers in the microbial community. Biofilm formation on high-density polyethylene, polyamide, acrylonitrile butadiene styrene plastic, polyvinyl chloride, and polycarbonate carriers under shear stresses ranging from 1.0 to 2.5 Pa was investigated using Couette–Taylor reactors. Employing extended Derjaguin–Landau–Verwey–Overbeek (XDLVO) theory, the bacterial reversible adhesion regions ranging from 3.74 ± 0.20 to 5.51 ± 0.24 nm on an organic carrier were quantified for the first time, elucidating significant differences among different carriers (p < 0.01). The colonization of pioneers in the microbial community was significantly altered by shear stress rather than carrier properties (p < 0.01). In particular, the diversity of the biofilm microbial community was pronouncedly enhanced by a higher shear stress (p < 0.01). XDLVO analysis suggested that extracellular polymeric substances had a negative feedback on subsequent microbial adhesion and biofilm development, especially the transition from reversible to irreversible bacterial adhesion. This study contributed to a better understanding of the biofilm formation process at the microscopic scale and shed light on micro-interfacial manipulation for biofilm accumulation or renewal.

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Section: Methodsmentioning

confidence: 99%

Revisiting the Microscopic Processes of Biofilm Formation on Organic Carriers: A Study under Variational Shear Stresses

Fan

Zhu

Zhang

et al. 2021

ACS Appl. Bio Mater.

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“…In the scientific studies, different substrates were fed to the microbial culture of the anodic chamber, those presenting higher yield in terms of electricity generation and metal recovery being the most biodegradable [ 65 , 73 ]. In other cases, real wastewaters have been coupled with the metals recovery in both synthetic and real AMD effluents [ 59 ] obtaining high recovery yields of the metals presenting the highest reduction potentials, mainly Cd, Cu, Fe, Al, Zn and Pb [ 64 , 66 ].…”

Section: Use Of Bio-electrochemical Processesmentioning

confidence: 99%

“…In conclusion, to obtain better removals and recoveries of metal is necessary to continue studying the initial concentration, molar ratios of elements from wastewaters, pH of catholyte, applied cell potential, flow regimes, inter alia as it can be proved with the scientific articles mentioned above [ 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 ].…”

Section: Use Of Bio-electrochemical Processesmentioning

confidence: 99%

An Old Technique with A Promising Future: Recent Advances in the Use of Electrodeposition for Metal Recovery

Delgado¹,

Fernández-Morales²,

Llanos³

2021

Molecules

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Although the first published works on electrodeposition dates from more than one century ago (1905), the uses of this technique in the recovery of metals are attracting an increasing interest from the scientific community in the recent years. Moreover, the intense use of metals in electronics and the necessity to assure a second life of these devices in a context of circular economy, have increased the interest of the scientific community on electrodeposition, with almost 3000 works published per year nowadays. In this review, we aim to revise the most relevant and recent publications in the application of electrodeposition for metal recovery. These contributions have been classified into four main groups of approaches: (1) treatment and reuse of wastewater; (2) use of ionic liquids; (3) use of bio-electrochemical processes (microbial fuel cells and microbial electrolysis cells) and (4) integration of electrodeposition with other processes (bioleaching, adsorption, membrane processes, etc.). This would increase the awareness about the importance of the technology and would serve as a starting point for anyone that aims to start working in the field.

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“…This will ensure that the concepts of sustainability and circular economy in mine water management are practiced, crystally due to the valorisation, beneficiation and value recovery from real AMD. Consequently, there is a wide array of technologies that have been employed for the treatment of AMD specifically at lab scale, bench scale, pilot scale, and full plant implementation [6,18,[34][35][36]; however, most of them have been reported to depollute the water with varying success, of which the main challenges are residual sulphates, generation of sludge that is toxic and expensive to dispose of, poor efficiencies in highly concentrated solutions, and high operating cost [5,18,[37][38][39][40], whilst recent technological development has cascaded effort towards sequentially recovery valuable minerals from AMD, hence off-setting possible ecological footprints of conventional treatment technologies [6,8,11,18,41,42]. Researchers mainly rely on two-or multi-staged approaches to sequentially recover valuable minerals [43].…”

Section: Introductionmentioning

confidence: 99%

Techno-Economic Analysis of the Reclamation of Drinking Water and Valuable Minerals from Acid Mine Drainage

et al. 2021

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The concept of circular economy in wastewater treatment has recently attracted immense interest and this is primarily fueled by the ever-growing interest to minimise ecological footprints of mining activities and metallurgical processes. In light of that, countries such as the Republic of South Africa, China, Australia, and the United States are at the forefront of water pollution due to the generation of notorious acid mine drainage (AMD). The disposal of AMD to different receiving environments constitutes a severe threat to the receiving ecosystem thus calling for prudent intervention to redress the prevailing challenges. Recent research emphasises the employment of wastewater treatment, beneficiation and valorisation. Herein, the techno-economic evaluation of the reclamation of clean water and valuable minerals from AMD using the Magnesite Softening and Reverse Osmosis (MASRO) process was reported. The total capital expenditure (CAPEX) for the plant is ZAR 452,000 (USD 31,103.22) which includes ZAR 110,000 (USD 7569.37) for civil works on a plant area of 100 m2. The operational expenditure (OPEX) for the pilot is 16,550,000 ZAR (South African Rand) or USD 1,138,845.72 in present value terms (10 years plant life). The plant reclaimed drinking water as specified in different water quality standards, guidelines, and specifications, including Fe-based minerals (goethite, magnetite, and hematite), Mg-gypsum, and calcium carbonate. These minerals were verified using state-of-the-art analytical equipment. The recovered valuables will be sold at ZAR 368/kL (USD 25.32), ZAR 1100/t (USD 75.69), and ZAR 2000/t (USD 137.62) for water, gypsum, and limestone, respectively. The project has an NPV of ZAR 60,000 (USD 4128.75) at an IRR of 26%. The payback period for this investment will take 3 years. The total power consumption per day was recorded to be 146.6 kWh, and 103,288 kWh/annum. In conclusion, findings of this work will significantly contribute to improving the sustainability of the mining sector by proposing economically feasible solutions for wastewater streams treatment, beneficiation, and valorisation.

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Effective Treatment of Acid Mine Drainage with Microbial Fuel Cells: An Emphasis on Typical Energy Substrates

Cited by 32 publications

References 51 publications

Revisiting the Microscopic Processes of Biofilm Formation on Organic Carriers: A Study under Variational Shear Stresses

Revisiting the Microscopic Processes of Biofilm Formation on Organic Carriers: A Study under Variational Shear Stresses

An Old Technique with A Promising Future: Recent Advances in the Use of Electrodeposition for Metal Recovery

Techno-Economic Analysis of the Reclamation of Drinking Water and Valuable Minerals from Acid Mine Drainage

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