Effect of substrate pretreatment on particle size distribution in a full-scale research biogas plant

Naegele, Hans-Joachim; Mönch-Tegeder, Matthias; Haag, Nicola Leonard; Oechsner, Hans

doi:10.1016/j.biortech.2014.09.037

Cited by 28 publications

(12 citation statements)

References 20 publications

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“…Similar sedimentation patterns were measured in operating digesters with Biobeta® Sediment Check [6]. There is a higher concentration of acetic acid near to the substrate feeding point decreasing with distance [7] and a non-uniform distribution of the particle size [8]. These results show that there is a degree of spacial segregation inside the digester (Distribution Heterogeneity, DH).…”

Section: Introductionsupporting

confidence: 70%

Representative Sampling Implementation in Online VFA/TIC Monitoring for Anaerobic Digestion

et al. 2019

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This paper describes an automatic sampling system for anaerobic reactors that allows taking representative samples following the guidelines of Gy’s (1998) theory of sampling. Due to the high heterogeneity degree in a digester the sampling errors are larger than the analysis error, making representative sampling a prerequisite for successful process control. In our system, samples are automatically processed, generating a higher density of data and avoiding human error by sample manipulation. The combination of a representative sampling system with a commercial automate titration unit generates a robust online monitoring system for biogas plants. The system was successfully implemented in an operating biogas plant to control a feeding-on-demand biogas system.

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Section: Introductionsupporting

confidence: 70%

Representative Sampling Implementation in Online VFA/TIC Monitoring for Anaerobic Digestion

et al. 2019

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“…1. Further details of the plant configuration can be found in 31. The solid substrate was supplied by a vertical mixer system into a cross‐flow grinder disintegration unit (Bio‐QZ, MeWa, Gechingen, Germany) and subsequently fed into the digester.…”

Section: Methodsmentioning

confidence: 99%

Expanding the Potential of G‐Quadruplex Structures: Formation of a Heterochiral TBA Analogue

et al. 2014

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In order to expand the potential applications of G-quadruplex structures, we explored the ability of heterochiral oligodeoxynucleotides based on the thrombin-binding aptamer (TBA) sequence to fold into similar complexes, with particular focus on their resistance in biological environments. A combination of CD and NMR techniques was used. Similarly to TBA, the ODN ggTTggtgtggTTgg (lower case letters indicate L residues) is able to fold into a chair-like antiparallel G-quadruplex structure, but has a slightly higher thermal stability. The discovery that heterochiral ODNs are able to form stable G-quadruplex structures opens up new possibilities for their development in several fields, as aptamers, sensors and, as recently shown, as catalysts for enantioselective reactions.

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“…The research biogas plant, its technical setup, and operation modes have been already fully described . The biogas is produced from a mixture of renewable energy crops (∼ 70 % maximum) as well as liquid and solid manure from animal husbandry (minimum ∼ 30 %) under thermophilic (40.5 ± 1) °C conditions in two digesters of identical construction with a volume of 923 m 3 , respectively.…”

Section: Methodsmentioning

confidence: 99%

Real‐Time Gas Quality Data for On‐Demand Production of Biogas

et al. 2018

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The flexible production of biogas makes it a promising candidate to become the first renewable, on‐demand energy source. One appealing possibility to achieve an on‐demand supply of methane is to adjust the output of the biogas plant itself. As a consequence, the biological process will be partially overloaded and might fail. Hence, a prerequisite to avoid cost‐intensive failure is a fast, reliable, and cost‐efficient analytical technology for quickly determining the biogas quality. A low‐cost, robust, in‐situ online measurement system for the real‐time determination of carbon dioxide and methane concentrations is presented. The approach makes use of photoacoustic detectors, allowing for the development of gas sensors with reduced size that do not show cross‐sensitivities towards water vapor. The system's readings may be used as input for a novel type of control system that enables an active, demand‐driven control of actuators, such as feeding machinery or mixers.

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Effect of substrate pretreatment on particle size distribution in a full-scale research biogas plant

Cited by 28 publications

References 20 publications

Representative Sampling Implementation in Online VFA/TIC Monitoring for Anaerobic Digestion

Representative Sampling Implementation in Online VFA/TIC Monitoring for Anaerobic Digestion

Expanding the Potential of G‐Quadruplex Structures: Formation of a Heterochiral TBA Analogue

Real‐Time Gas Quality Data for On‐Demand Production of Biogas

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