Integrated electrochemical-biological process as an alternative mean for ammonia monitoring during anaerobic digestion of organic wastes

Zhao, Nannan; Li, Xiaohu; Jin, Xiangdan; Angelidaki, Irini; Zhang, Yifeng

doi:10.1016/j.chemosphere.2017.12.139

Cited by 28 publications

(8 citation statements)

References 32 publications

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“…An MFC made of nonconductive polycarbonate plates was set up as previously described [15]. The anode chamber (5×5 cm) and cathode chamber (5×5 cm) was separated by a cation exchange membrane (CEM, To enrich exoelectrogenic biofilm on the anode, 300 ml domestic wastewater collected from a primary clarifier (Lundtofe Wastewater Treatment Plant, Lyngby, Denmark) was used as the medium and 1 g L -1 glucose was added as substrate to acclimate the electroactive bacterial consortia.…”

Section: Mfc Construction and Operationmentioning

confidence: 99%

Electricity generation and microbial communities in microbial fuel cell powered by macroalgal biomass

Zhao

Jiang

Alvarado-Morales

et al. 2018

Bioelectrochemistry

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The potential of macroalgae Laminaria digitata as substrate for bioelectricity production was examined in a microbial fuel cell (MFC). A maximum voltage of 0.5 V was achieved without any lag time due to the high concentration of glucose and mannitol in the hydrolysate. Total chemical oxygen demand removal efficiency reached over 95% at the end of batch run. Glucose and mannitol were degraded through isobutryrate as intermediate. The 16S rRNA gene high throughout sequencing analysis of anodic biofilm revealed complex microbial composition dominated by Bacteroidetes (39.4%), Firmicutes (20.1%), Proteobacteria (11.5%), Euryarchaeota (3.1%), Deferribacteres (1.3%), Spirochaetes (1.0%), Chloroflexi (0.7%), Actinobacteria (0.5%), and others (22.4%). The predominance of Bacteroidetes, Firmicutes and Proteobacteria demonstrated their importance for substrate degradation and simultaneous power generation. These results demonstrate that macroalgae hydrolysate can be used as a renewable carbon source of microbial electrochemical systems for various environmental applications.

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Section: Mfc Construction and Operationmentioning

confidence: 99%

Electricity generation and microbial communities in microbial fuel cell powered by macroalgal biomass

Zhao

Jiang

Alvarado-Morales

et al. 2018

Bioelectrochemistry

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“…Innovative green tools for monitoring the degradation processes are currently in the spotlight. Sensors, as compared to traditional sampling and analysis procedures, can provide fast response on the output data in a continuous, safe, and cost-effective way, and therefore may play a role in monitoring contaminants' dynamics [20]. Among sensors, the electronic tongue (e-tongue) is gaining special attention for liquid matrices.…”

Section: Introductionmentioning

confidence: 99%

Electronic Tongue Coupled to an Electrochemical Flow Reactor for Emerging Organic Contaminants Real Time Monitoring

Magro

Mateus

Paz‐Garcia

et al. 2019

Sensors

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Triclosan, which is a bacteriostatic used in household items, has raised health concerns, because it might lead to antimicrobial resistance and endocrine disorders in organisms. The detection, identification, and monitoring of triclosan and its by-products (methyl triclosan, 2,4-Dichlorophenol and 2,4,6-Trichlorophenol) are a growing need in order to update current water treatments and enable the continuous supervision of the contamination plume. This work presents a customized electronic tongue prototype coupled to an electrochemical flow reactor, which aims to access the monitoring of triclosan and its derivative by-products in a real secondary effluent. An electronic tongue device, based on impedance measurements and polyethylenimine/poly(sodium 4-styrenesulfonate) layer-by-layer and TiO2, ZnO and TiO2/ZnO sputtering thin films, was developed and tested to track analyte degradation and allow for analyte detection and semi-quantification. A degradation pathway trend was observable by means of principal component analysis, being the sample separation, according to sampling time, explained by 77% the total variance in the first two components. A semi-quantitative electronic tongue was attained for triclosan and methyl-triclosan. For 2,4-Dichlorophenol and 2,4,6-Trichlorophenol, the best results were achieved with only a single sensor. Finally, working as multi-analyte quantification devices, the electronic tongues could provide information regarding the degradation kinetic and concentrations ranges in a dynamic removal treatment.

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“…AGS was directly used as the inoculum for MFC startup. The synthetic wastewater contained (in g/L of distilled water) sodium acetate, 1 (unless otherwise stated); NH 4 Cl, 0.31; NaH 2 PO 4 ·H 2 O, 2.69; Na 2 HPO 4 , 4.33; KCl, 0.13; and 12.5 mL of mineral solution and 12.5 mL of vitamin solution as described before . The final pH of synthetic wastewater was always kept at 7.0 ± 0.2.…”

Section: Methodsmentioning

confidence: 99%

“…The synthetic wastewater contained (in g/L of distilled water) sodium acetate, 1 (unless otherwise stated); NH 4 Cl, 0.31; NaH 2 PO 4 • H 2 O, 2.69; Na 2 HPO 4 , 4.33; KCl, 0.13; and 12.5 mL of mineral solution and 12.5 mL of vitamin solution as described before. 19 The final pH of synthetic wastewater was always kept at 7.0 ± 0.2. The anode chamber and external bottle were filled with the aforementioned synthetic wastewater, reaching a total volume of 550 mL.…”

Section: ■ Introductionmentioning

confidence: 99%

Exoelectrogenic Anaerobic Granular Sludge for Simultaneous Electricity Generation and Wastewater Treatment

Zhao

Treu

Angelidaki

et al. 2019

Environ. Sci. Technol.

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Thick and electroactive biofilm is the key for successful development of microbial electrochemical technologies and systems (METs). In this study, intact anaerobic granular sludge (AGS), which are spherical and dense microbial associations, was successfully demonstrated as novel and efficient biocatalysts in METs such as microbial fuel cell (MFC). Three different strategies were explored to shift the microbial composition of AGS from methanogenic into exoelectrogenic microbes, including varying external resistance, organic loading, and manipulating anode potential. Among other strategies, only with positive anode potential, AGS was successfully shifted from methanogenic to exoelectrogenic conditions, as indicated by the significantly high current response (10.32 A/m 2) and 100% removal of organic carbon from wastewater. Moreover, AGS bioanode showed no significant decrease in current generation and organic removal at pH 5, indicating good tolerance of AGS to acidic conditions. Finally, 16S rRNA sequencing revealed the enrichment of exoelectrogens and inhibition of methanogens in the microbial community of AGS after anode potential control. This study provides a proof-in-concept of extracting electrical energy from organic wastes by exoelectrogenic AGS along with simultaneous wastewater treatment, and meanwhile opens up a new paradigm to create efficient and cost-effective exoelectrogenic biocatalyst for boosting the industrial application of METs.

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Integrated electrochemical-biological process as an alternative mean for ammonia monitoring during anaerobic digestion of organic wastes

Cited by 28 publications

References 32 publications

Electricity generation and microbial communities in microbial fuel cell powered by macroalgal biomass

Electricity generation and microbial communities in microbial fuel cell powered by macroalgal biomass

Electronic Tongue Coupled to an Electrochemical Flow Reactor for Emerging Organic Contaminants Real Time Monitoring

Exoelectrogenic Anaerobic Granular Sludge for Simultaneous Electricity Generation and Wastewater Treatment

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