Treatment of landfill leachate using microbial fuel cells: Alternative anodes and semi-continuous operation

Ganesh, K. M.; Jambeck, Jenna

doi:10.1016/j.biortech.2013.04.013

Cited by 79 publications

(23 citation statements)

References 13 publications

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“…It was found that smaller particle size (1 mm) of the biochar promotes higher decrease in BOD 5 (in two times lower in comparison to untreated landfill leachate) due to the bigger contact surface of smaller particles with landfill leachate. Similar values were observed when BOD was decreased by 32.77% from landfill leachate by microbial fuel cells (Ganesh, Jambeck 2013).…”

Section: Effect Of Biochar On Bod 5 Of Landfill Leachatesupporting

confidence: 74%

Pine-derived Biochar as Option for Adsorption of Сu, Zn, Cr, Pb, Ni and Decreasing of BOD5 in Landfill Leachate

Chemerys

Baltrėnaitė

2017

Science - Future of Lithuania

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Abstract. Landfill leachate is a highly toxic and hazardous form of wastewater due to its complex composition characteristics, e.g. ammonia, metals, organic compounds. Landfill leachate treatment technologies, such as flotation, coagulation/flocculation, precipitation, oxidation, micro-, ultra-, nanofiltration, reverse osmosis, are too expensive, because they require frequent regeneration of the media or generate secondary brine wastes that may pose a disposal problem. In the present study removal of Zn, Ni, Cr, Pb, Cu from Kazokiškės landfill leachate was studied. Kazokiškės landfill is the main site for disposal of Vilnius region municipal wastes. Operator of the landfill is interested in the alternative ways for the primary treatment of the landfill leachate for reducing the load on the expensive reverse osmosis. One of the proposed options for the primary landfill leachate treatment was adsorption by biochar. Due to the high specific surface area, well-developed porous structure and surface functionality biochar has been used as low-cost adsorbent for adsorption of PTEs from aqueous solutions. Biochar was produced from Scots pine (Pinus sylvestris L.) trunk wood (after debarking) by pyrolysis at the highest heating temperature of 700 °C for 45 min in the low-oxygen environment. Laboratory analysis showed that PTEs, such as Zn, Ni, Cr, Pb, Cu, were present in the landfill leachate before water treatment plant. Thus, the aim of the study was to evaluate PTEs (Zn, Ni, Cr, Pb, Cu) removal efficiency by adsorption by pine-derived biochar. Factors, affecting adsorption efficiency, such as biochar particle size (1, 2.5, 4, 5 mm) and dosage of the biochar (1. 01, 3.5, 6.05, 9.45, 13.25, 17.82 g/100 ml of leachate) were studied. Effects of the biochar on pH of the landfill leachate, BOD 5 , PTEs adsorption were analyzed. The findings showed that optimal parameters for decreasing of BOD 5 and retention of Cr and Pb were particle size 1 mm and dosage 6.05 g/100 ml of leachate and 1 mm and more than 13.25 g/100 ml of leachate, respectively. No positive effect on Cu and Zn was observed.

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Section: Effect Of Biochar On Bod 5 Of Landfill Leachatesupporting

confidence: 74%

Pine-derived Biochar as Option for Adsorption of Сu, Zn, Cr, Pb, Ni and Decreasing of BOD5 in Landfill Leachate

Chemerys

Baltrėnaitė

2017

Science - Future of Lithuania

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“…However, in the present study, the highest BOD removal percentage recorded was 95.0 AE 0.3% at 35 C, followed by 94.4 AE 0.5% at 30 C which was therefore able to achieve the stringent effluent discharge requirement set by the DOE for the BOD parameter, where the final BOD achieved was 11.65 mg/l and 12.9 mg/l, respectively. In comparison to the previous study done in a non-hybrid semicontinuous air-cathode MFC, such system was only able to remove 77% of the BOD from landfill leachate [45]. The operating temperature was however not mentioned by the authors.…”

Section: Organics and Solids Removalmentioning

confidence: 64%

Effects of temperature on wastewater treatment in an affordable microbial fuel cell-adsorption hybrid system

Tee

Abdullah

Tan

et al. 2017

Journal of Environmental Chemical Engineering

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A B S T R A C TA cost effective single-chamber microbial fuel cell (MFC) integrated with adsorption system was tested under different operating temperatures to observe pH profiles, organics, solids, nutrients, color and turbidity removal and power density generation. The optimum operating temperature range was found to be $25-35 C with majority of the removals achieved at $35 C. Maximum power density recorded was 74 AE 6 mW/m 3 with coulombic efficiency (CE) of 10.65 AE 0.5% when operated at 35 C. Present studies had successfully demonstrated the effectiveness of a hybrid system in removing various types of pollutants in POME at optimum temperature and able to fulfill the stringent effluent discharge limit. Chemical oxygen demand (COD), total solids (TS) and turbidity removals increase linearly with temperatures with removal efficiency of 0.5889% C À1 , 1.0754% C À1 and 0.7761% C À1, respectively. The temperature coefficient (Q 10 ) is found to be 1.06, 1.45 and 1.09, respectively. Besides, MFC-adsorption hybrid system had demonstrated superior stability over a wide range of operating temperatures in terms of COD removal as compared to the non-integrated MFC system.

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“…In MECs, a higher current density would greatly enhance ammonia recovery, and thus MECs with an external power exhibit a better performance for ammonium recovery than MFCs (Zhang et al 2014b). Previous studies of leachate treatment by BES focused on the reduction of chemical oxygen demand (COD) in leachate by various types of MFCs (Ganesh andJambeck 2013, Greenman et al 2009). It was demonstrated that MFCs could generate electricity from leachate, but the excessive organic residues may decrease Coulombic efficiency (CE), especially in membraneless MFC systems .…”

Section: Introductionmentioning

confidence: 99%

Resource recovery by osmotic bioelectrochemical systems towards sustainable wastewater treatment

Qin

2017

Environ. Sci.: Water Res. Technol.

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(academic)Recovering valuable resources from wastewater will transform wastewater management from a treatment focused to sustainability focused strategy, and creates the need for new technology development. An innovative treatment concept -osmotic bioelectrochemical system (OsBES), which is based on cooperation between bioelectrochemical systems (BES) and forward osmosis (FO), has been introduced and studied in the past few years. An OsBES can accomplish simultaneous treatment of wastewater and recovery of resources such as nutrient, energy, and water (NEW). The cooperation can be accomplished in either an integrated (osmotic microbial fuel cells, OsMFC) or coupled (microbial electrolysis cell-forward osmosis system, MEC-FO) configuration.In OsMFC, higher current generation than regular microbial fuel cell (MFC) was observed, resulting from the lower resistance of FO membrane. The electricity generation in OsMFC could greatly inhibit the reverse salt flux. Besides, ammonium removal was successfully demonstrated in OsMFC, making OsMFCs a promising technology for "NEW recovery" (NEW: nutrient, energy and water). For the coupled OsBES, an MEC-FO system was developed. The MEC produced an ammonium bicarbonate draw solute via recovering ammonia from synthetic organic solution, which was then applied in the FO for extracting water from the MEC anode effluent. The system has been advanced with treating landfill leachate. A mathematical model developed for ammonia removal/recovery in BES quantitatively confirmed that the NH4 + ions serve as effective proton shuttles across cation exchange membrane (CEM). Resource Recovery by Osmotic Bioelectrochemical Systems towards Sustainable Wastewater TreatmentMohan Qin Abstract (general audience)Nowadays, wastewater is no longer considered as waste. Instead, it is a pool for different kinds of resources, such as nutrient, energy, and water (NEW). Various technologies were developed to achieve NEW recovery from wastewater. A novel concept, osmotic bioelectrochemical system (OsBES) has been introduced and studied in the past few years. OsBES is based on two technologies: bioelectrochemical systems (BES) and forward osmosis (FO); and the corporation between these two technologies could accomplish simultaneous wastewater treatment and resource recovery. We investigated two kinds of OsBES: one is osmotic microbial fuel cells (OsMFC), and the other is microbial electrolysis cell-forward osmosis system (MEC-FO). For OsMFC, a mathematical model was built to understand the internal resistance, which will affect the current generation according to Om's law (I=U/R). The salt transport across the cation exchange membrane (CEM) is related to the current generation. The ion transport, especially ammonium/ammonia transport, across CEM membrane in BES was modelled, which will help the BES design and operation for ammonia recovery systems. The system performance for wastewater treatment and resource recovery in MEC-FO was fully investigated with both synthetic wastewater and landfill leach...

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Treatment of landfill leachate using microbial fuel cells: Alternative anodes and semi-continuous operation

Cited by 79 publications

References 13 publications

Pine-derived Biochar as Option for Adsorption of Сu, Zn, Cr, Pb, Ni and Decreasing of BOD5 in Landfill Leachate

Pine-derived Biochar as Option for Adsorption of Сu, Zn, Cr, Pb, Ni and Decreasing of BOD5 in Landfill Leachate

Effects of temperature on wastewater treatment in an affordable microbial fuel cell-adsorption hybrid system

Resource recovery by osmotic bioelectrochemical systems towards sustainable wastewater treatment

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