Utilization of a palladium-metal oxide semiconductor (Pd-MOS) sensor for on-line monitoring of dissolved hydrogen in anaerobic digestion

Björnsson, Lovisa; Hörnsten, E. G.; Mattìasson, Bo

doi:10.1002/1097-0290(20010405)73:1<35::aid-bit1034>3.0.co;2-h

Cited by 25 publications

(14 citation statements)

References 35 publications

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“…There are extraction and H 2 permeable membrane methods designed for dissolved H 2 monitoring within the digester, but these can be expensive and time‐consuming processes. The membrane requiring Clark‐type electrodes can be used for online monitoring of dissolved H 2 in the liquid phase, which relies on the oxidation of H 2 at a Pt electrode and dissociation of molecular hydrogen at a Pd electrode . Unfortunately, these are prone to biofouling on the membrane surface.…”

Section: Current Methods Of H2 Detection In Admentioning

confidence: 99%

“…An alternative method for dissolved H 2 detection was described by Björnsson et al. . Here, a liquid‐to‐gas membrane was utilized to extract dissolved H 2 from the liquid phase, through a Teflon membrane placed in the internal environment of the anaerobic digester.…”

Section: Current Methods Of H2 Detection In Admentioning

confidence: 99%

“…Here, a liquid‐to‐gas membrane was utilized to extract dissolved H 2 from the liquid phase, through a Teflon membrane placed in the internal environment of the anaerobic digester. The H 2 was then detected using a palladium metal oxide semiconductor sensor .…”

Section: Current Methods Of H2 Detection In Admentioning

confidence: 99%

“…Sample preprocessing is also possible by significantly increasing the pH of the sample to remove H 2 S; however, this is not desirable as it adds another step to the detection of H 2 and will probably affect concentrations of other variables within the sample, including H 2 . Development of specific thin film layers on top of the palladium has been shown to reduce the interferences of H 2 S .…”

Section: Emerging Spr Sensor Technologies For Admentioning

confidence: 99%

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Perspectives of surface plasmon resonance sensors for optimized biogas methanation

Lamb¹,

Bernard

Sarker³

et al. 2019

Engineering in Life Sciences

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Biogas production is becoming significantly viable as an energy source for replacing fossil‐based fuels. The further development of the biogas production process could lead to significant improvements in its potential. Wastewater treatment currently accounts for 3% of the electrical energy load in developed countries, while it could be developed to provide a source of nitrogen and phosphorus, in addition to energy. The improvement of anaerobic digestion (AD) detection technologies is the cornerstone to reach higher methane productivities and develop fully automatized processes to decrease operational costs. New sensors are requested to automatically obtain a better interpretation of the complex and dynamical internal reactor environment. This will require detailed systematic detection in order to realize a near‐optimal production process. In this review, optical fiber‐based sensors will be discussed to assess their potential for use in AD. There is currently a disparity between the complexity of AD, and online detection. By improving the durability, sensitivity, and cost of dissolved H2 (as well as H2S, acetic acid, ammonia, and methane) sensor technology, further understanding of the AD process may allow the prevention of process failure. The emergence of surface plasmon resonance (SPR) sensing with optical fibers coupled with the H2‐sensitive metal palladium, allows detection of dissolved hydrogen in liquid. By implementing these SPR sensors into AD, improvements to the biogas production process, even at small scales, may be achieved by guiding the process in the optimum direction, avoiding the collapse of the biological process. This review intends to assess the feasibility of online, cost‐effective, rapid, and efficient detection of dissolved H2, as well as briefly assessing H2S, acetic acid, ammonia, and methane in AD by SPR.

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Section: Current Methods Of H2 Detection In Admentioning

confidence: 99%

Section: Current Methods Of H2 Detection In Admentioning

confidence: 99%

Section: Current Methods Of H2 Detection In Admentioning

confidence: 99%

Section: Emerging Spr Sensor Technologies For Admentioning

confidence: 99%

See 2 more Smart Citations

Perspectives of surface plasmon resonance sensors for optimized biogas methanation

Lamb¹,

Bernard

Sarker³

et al. 2019

Engineering in Life Sciences

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show abstract

“…As a result the contamination of the sensors' surface by the broth components is reduced and possible problems with sterilization and sampling are avoided. The downside of it is that redistribution between liquid and gas phases takes certain time for some compounds especially for the ones present in liquid at low concentrations, which leads to a time lag between changes in the fermented medium and sensor system response [53]. Other problems with gas sensor system include sensitivity to water vapors, which are abundant in the headspace and interfere with sensors' response to the substances of interests.…”

Section: Application Of the Electronic Tongue And Noses To The Fermenmentioning

confidence: 99%

Sensor systems, electronic tongues and electronic noses, for the monitoring of biotechnological processes

Rudnitskaya¹,

Legin²

2008

J Ind Microbiol Biotechnol

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Production of biofuel is based on the conversion by microorganisms of complex organic substrates into the methane or ethanol, which are consequently used as energy sources. Real time monitoring of the fermented media composition is of paramount for the effectiveness of the whole process. However, despite the fact that products worth billions of dollars are produced through fermentation processes annually, analytical instruments used for these processes' monitoring remain relatively primitive. Established laboratory techniques produce exhaustive information about media composition but analysis is often quite time-consuming, expensive, requires skilled personnel and hardly can be automated. Lack of on-line sensors for the fermentation monitoring is commonly stressed in the literature. One of the techniques particularly suitable for this purpose is chemical sensors. Such features as low prices, relatively simple instrumentation, minimal sample preparation and easy automation of measurements make chemical sensors an attractive tool for industrial process control. However, practical use of chemical sensors in complex media is often hindered by their insufficient selectivity. For example, only pH and oxygen probes are routinely used in bio-reactors. One of the emerging approaches permitting to overcome the selectivity problems is the use of systems instead of discrete sensors. Such systems for liquid and gas analysis were named electronic tongues and electronic noses correspondingly. They are capable to perform both quantitative analysis (components' concentrations) and classification or recognition of multicomponent media. This review presents recent achievements in the R&D and applications of electronic tongues and noses to the monitoring of biotechnological processes.

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Sampling and Sample Handling for Process Control

Mattìasson

Hedström

2010

Encyclopedia of Industrial Biotechnology

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Sampling and sample handling are crucial steps in monitoring and control of bioprocesses. Reproducibility in sampling and handling of the sample are key issues when developing new analytical tools. One of the problems with biotechnological processes is that often, microorganisms or enzymes are present in the sample and their activities have to be stopped in the sampling moment, otherwise the composition of the sample may change before analysis is carried out. Integrated processing of samples can be carried out using flow‐injection analysis with different processing steps such as dialysis, dilution, reagent addition etc. This area is attracting increasing interest now when industrial biotechnology is addressing processes with relatively low margins and where efficient process technology is a prerequisite.

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Utilization of a palladium-metal oxide semiconductor (Pd-MOS) sensor for on-line monitoring of dissolved hydrogen in anaerobic digestion

Cited by 25 publications

References 35 publications

Perspectives of surface plasmon resonance sensors for optimized biogas methanation

Perspectives of surface plasmon resonance sensors for optimized biogas methanation

Sensor systems, electronic tongues and electronic noses, for the monitoring of biotechnological processes

Sampling and Sample Handling for Process Control

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