High-rate denitrification and SS rejection by biofilm-electrode reactor (BER) combined with microfiltration

Michal, Peter; Sakakibara, Yutaka; Kuroda, Masao

doi:10.1016/s0043-1354(02)00206-3

Cited by 124 publications

(88 citation statements)

References 14 publications

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“…Bio-electrochemical treatment potentially has the advantage of lower cost when treating a larger volume of wastewater as compared to addition of chemical amendments, which may have a higher cost of operation. Prosnansky et al (2002) used electrical stimulation to remove nitrate in synthetic groundwater and estimated operating costs of 0.15-0.48 $/m 3 of treated water with current densities set between 2.7 and 6 A/m 3 . If electrification can improve denitrification rate and thus volumetric removal, then it could facilitate smaller bioreactors which are even more attractive for edge-of-field treatment.…”

Section: Introductionmentioning

confidence: 99%

Electrical stimulation for enhanced denitrification in woodchip bioreactors: Opportunities and challenges

Law

Soupir

Raman

et al. 2018

Ecological Engineering

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Woodchip bioreactors are being implemented for the removal of nitrates in groundwater and tile water drainage. However, low nitrate removals in denitrifying woodchip bioreactors have been observed for short hydraulic retention time (HRT) and low water temperature (°C). One potential approach to improve woodchip bioreactor performance is to provide an alternative and readily available electron source to the denitrifying microorganisms through electrical stimulation. Previous work has demonstrated the capability of bio-electrochemical reactors (BER) to remove a variety of water contaminants, including nitrate, in the presence of a soluble carbon source. The objective of this study was to evaluate the denitrification efficiency of electrically augmented woodchip bioreactors and conduct a simple techno-economic analysis (TEA) to understand the possibilities and limitations for full-scale BER implementation for treatment of agricultural drainage. Up-flow column woodchip bioreactors were studied included two controls (non-energized, and without electrodes), two electrically enhanced bioreactors, each using a single 316 stainless steel anode coupled with graphite cathodes, and two electrically enhanced bioreactors, each with graphite for both anode and cathodes. Both pairs of electrically enhanced bioreactors demonstrated higher denitrification efficiencies than controls when 500 mA of current was applied. While this technology appeared promising, the technoeconomic analysis showed that the normalized N removal cost ($/kg N) for BERs was 2-10 times higher than the base cost with no electrical stimulation. With our current reactor design, opportunities to make this technology cost effective require denitrification efficiency of 85% at 100 mA. This work informs the process and design of electrically stimulated woodchip bioreactors with optimized performance to achieve lower capital and maintenance costs, and thus lower N removal cost. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. A B S T R A C TWoodchip bioreactors are being implemented for the removal of nitrates in groundwater and tile water drainage. However, low nitrate removals in denitrifying woodchip bioreactors have been observed for short hydraulic retention time (HRT) and low water temperature (< 10°C). One potential approach to improve woodchip bioreactor performance is to provide an alternative and readily available electron source to the denitrifying microorganisms through electrical stimulation. Previous work has demonstrated the capability of bio-electrochemical reactors (BER) to remove a variety of water contaminants, including nitrate, in the presence of a soluble carbon source. The objective of this study was to evaluate the denitrification efficiency of electrically augmented woodchip bioreactors and conduct a simple techno-economic analysis (TEA) to understand the possibilities and limitations for full-scale BER im...

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Section: Introductionmentioning

confidence: 99%

Electrical stimulation for enhanced denitrification in woodchip bioreactors: Opportunities and challenges

Law

Soupir

Raman

et al. 2018

Ecological Engineering

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“…Autotrophic denitrifying microorganisms were immobilized toward the surface of cathode thus they could utilize H 2 conveniently for nitrate reduction. Recently, many efforts have been reported to improve the design for the efficient and economical removal of nitrate from water by this bioelectrochemical method (Prosnansky et al, 2002;Park et al, 2005;Ghafari et al, 2008). The novel proton-exchange membrane electrodialysis denitrification (PEMED) system was first proposed and explored in batch mode in 2010 (Wan et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Study of a combined sulfur autotrophic with proton-exchange membrane electrodialytic denitrification technology: Sulfate control and pH balance

Wan

Liu

et al. 2011

Bioresource Technology

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“…Carbon source and waste management costs are usually responsible for more than 50% of the total costs of wastewater treatment, which creates a bottle-neck problem in these wastewater treatment technologies (Fernández-Nava et al 2010). More and more new biological technologies have been developed to overcome shortcomings of previous technology in recent years, for example, the sulfur-limestone autotrophic denitrification (SLAD) process (Feleke and Sakaibara 2002;Prosnansky et al 2002) and the combined bioelectrochemical and sulfur autotrophic denitrification system (CBSAD) (Wan et al 2009). However, the low removal rate and efficiency is still a key problem in this field.…”

Section: Introductionmentioning

confidence: 99%

Catalyzing denitrification of Paracoccus versutus by immobilized 1,5-dichloroanthraquinone

Liu

Guo

et al. 2011

Biodegradation

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The accelerating effect of non-dissolved redox mediator (1,5-dichloroanthraquinone) on the biological denitrification was investigated in this paper using 1,5-dichloroanthraquinone immobilized by calcium alginate (CA) and a heterotrophic denitrification bacterium of Paracoccus versutus (GU111570). The results suggested that the denitrification rate was enhanced 2.1 fold by 25 mmol l -1 1,5-dichloroanthraquinone of this study, and a positive correlation was found for the denitrification rate and 1,5-dichloroanthraquinone concentrations from 0 to 25 mmol l -1 . According to the change characteristic of NO 3 -and NO 2 -during the denitrification process, the tentative accelerating mechanism of the denitrification by redox mediators was put forward, and redox mediator might play the role of reduced cofactors like NADH, N(A)DH and SDH, or the similar ubiquinol/ubiquinone (Q/QH 2 ) role during the denitrification process.

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High-rate denitrification and SS rejection by biofilm-electrode reactor (BER) combined with microfiltration

Cited by 124 publications

References 14 publications

Electrical stimulation for enhanced denitrification in woodchip bioreactors: Opportunities and challenges

Electrical stimulation for enhanced denitrification in woodchip bioreactors: Opportunities and challenges

Study of a combined sulfur autotrophic with proton-exchange membrane electrodialytic denitrification technology: Sulfate control and pH balance

Catalyzing denitrification of Paracoccus versutus by immobilized 1,5-dichloroanthraquinone

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