Exploiting a new electrochemical sensor for biofilm monitoring and water treatment optimization

Pavanello, Giovanni; Faimali, Marco; Pittore, Massimiliano; Mollica, Angelo; Mollica, Alessandro; Mollica, A.

doi:10.1016/j.watres.2010.12.003

Cited by 39 publications

(21 citation statements)

References 25 publications

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“…Electroactive species have also been used as markers of surface biofouling [13,14]. The early detection of electroactivity has successfully been implemented for monitoring equipment biofouling in marine and fresh water environments [15]. In this case, the sensors were based on cathodic catalysis but, given the ubiquity of exoelectrogenic species [16,17], there is no doubt that anodic sensors will also be developed in the future to investigate or monitor environmental biofilms.…”

Section: Introductionmentioning

confidence: 99%

Effect of surface roughness, porosity and roughened micro-pillar structures on the early formation of microbial anodes

Champigneux

Renault-Sentenac

Bourrier

et al. 2019

Bioelectrochemistry

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The early formation of electroactive biofilms was investigated with gold electrodes inoculated with Geobacter sulfurreducens. Biofilms were formed under an applied potential of 0.1 V/SCE, with a single batch of acetate 10 mM, on flat gold electrodes with different random surface roughness. Roughness with arithmetical mean height (S a) ranging from 0.5 to 6.7 μm decreased the initial latency time, and increased the current density by a factor of 2.7 to 6.7 with respect to nano-rough electrodes (S a = 4.5 nm). The current density increased linearly with S a up to 14.0 A•m −2 for S a of 6.7 μm. This linear relationship remained valid for porous gold. In this case, the biofilm rapidly formed a uniform layer over the pores, so porosity impacted the current only by modifying the roughness of the upper surface. The current density thus reached 14.8 ± 1.1 A•m −2 with S a of 7.6 μm (7 times higher than the nano-rough electrodes). Arrays of 500-μm-high micro-pillars were roughened following the same protocol. In this case, roughening resulted in a modest gain around 1.3-fold. A numerical model showed that the modest enhancement was due to ion transport not being sufficient to mitigate the local acidification of the structure bottom.

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Section: Introductionmentioning

confidence: 99%

Effect of surface roughness, porosity and roughened micro-pillar structures on the early formation of microbial anodes

Champigneux

Renault-Sentenac

Bourrier

et al. 2019

Bioelectrochemistry

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“…The management of the active surface of sensors (e.g., sensing area) is also important for the stable measurement of water quality in the longer term. For example, the formation of slimes or precipitations by the accumulation of biological or chemical materials on the surface of the sensor possibly reduces the accuracy of the sensor, as well as sensor's lifetime [91,92]. Thus, a practical management technology such as regeneration of sensing area by physical and/or chemical cleaning is another possible research area.…”

Section: Consideration In Water Quality Monitoring Using Sensorsmentioning

confidence: 99%

Recent Advances in Information and Communications Technology (ICT) and Sensor Technology for Monitoring Water Quality

Park

Kim

Lee

2020

Water

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Water quality control and management in water resources are important for providing clean and safe water to the public. Due to their large area, collection, analysis, and management of a large amount of water quality data are essential. Water quality data are collected mainly by manual field sampling, and recently real-time sensor monitoring has been increasingly applied for efficient data collection. However, real-time sensor monitoring still relies on only a few parameters, such as water level, velocity, temperature, conductivity, dissolved oxygen (DO), and pH. Although advanced sensing technologies, such as hyperspectral images (HSI), have been used for the areal monitoring of algal bloom, other water quality sensors for organic compounds, phosphorus (P), and nitrogen (N) still need to be further developed and improved for field applications. The utilization of information and communications technology (ICT) with sensor technology shows great potential for the monitoring, transmission, and management of field water-quality data and thus for developing effective water quality management. This paper presents a review of the recent advances in ICT and field applicable sensor technology for monitoring water quality, mainly focusing on water resources, such as rivers and lakes, and discusses the challenges and future directions.

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“…Several years ago it was demonstrated that those electrochemical sensors are able to detect the electrochemical activity of a biofilm (Faimali et al, 2010 andPavanello et al, 2011). This activity is proportional to the surface covered with biofilm.…”

Section: Equipment and Pilot Facilitymentioning

confidence: 99%

Detection and Monitoring of Biofilm Growth in the Seawater Sulfate Removal Units

Baldoni-Andrey¹,

Lesage²,

Pedenaud³

et al. 2015

All Days

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Large quantities of seawater are injected in oil and gas fields for pressure support and sweeping efficiency of the reservoir. This injection enhances the hydrocarbon recovery. Many difficulties are induced by sea water injection, such as the risk of sulfate based scale formation like barium sulfate precipitation. Seawater contains around 2800 mg/L of sulfate and some reservoir water may contain large quantities of barium and strontium. When those two waters are mixed into the reservoir, precipitation will occur and reduce the efficiency of water injection. In the producer wells, scale deposits may significantly reduce oil production. This is why technical solutions are more and more implemented to remove sulfate from the sea water before injection. Filtration processes using nanofiltration membranes are able to reduce the sulfate content of seawater, and this technique has been successfully operated for more than 12 years on several TOTAL offshore sites.The use of nanofiltration membranes requires an efficient pretreatment of seawater in order to control the fouling that will reduce the capacity of the sulfate removal unit over time. The only way to remove this fouling and recover the capacity of the unit is to stop a part of the unit and operate a chemical cleaning of the membranes. Biological fouling appears to be predominant on nanofiltration membranes for this application. As a consequence, preventing biofilm growth is a key aspect to increase availability of those units and can also be of interest for corrosion management.This paper presents the main results of experiments carried out by TOTAL on a sea water filtration pilot. Biofilm measuring probes have been tested in order to detect as soon as possible a change in the growth rate of the biofilm. Results demonstrated that such tools could be implemented in order to detect a default in the biofilm prevention strategy. This early detection tool will enable to react before the full system (all trains) requires a chemical cleaning in place.The eventual objectives of this tool are to maximize reliability of desulfated water injection, to optimize use of chemicals, to increase nanofiltration membrane lifetime, and facilitate field operation of such units.

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Exploiting a new electrochemical sensor for biofilm monitoring and water treatment optimization

Cited by 39 publications

References 25 publications

Effect of surface roughness, porosity and roughened micro-pillar structures on the early formation of microbial anodes

Effect of surface roughness, porosity and roughened micro-pillar structures on the early formation of microbial anodes

Recent Advances in Information and Communications Technology (ICT) and Sensor Technology for Monitoring Water Quality

Detection and Monitoring of Biofilm Growth in the Seawater Sulfate Removal Units

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