TY  - JOUR
A1  - Teumer, Tobias
A1  - Capitain, Charlotte
A1  - Ross-Jones, Jesse
A1  - Tippkötter, Nils
A1  - Rädle, Matthias
A1  - Methner, Frank-Jürgen
T1  - In-line Haze Monitoring Using a Spectrally Resolved Back Scattering Sensor
JF  - BrewingScience
N2  - In the present work an optical sensor in combination with a spectrally resolved detection device for in-line particle-size-monitoring for quality control in beer production is presented. The principle relies on the size and wavelength dependent backscatter of growing particles in fluids. Measured interference structures of backscattered light are compared with calculated theoretical values, based on Mie-Theory, and fitted with a linear least square method to obtain particle size distributions. For this purpose, a broadband light source in combination with a process-CCD-spectrometer (charge ? coupled device spectrometer) and process adapted fiber optics are used. The goal is the development of an easy and flexible measurement device for in-line-monitoring of particle size. The presented device can be directly installed in product fill tubes or vessels, follows CIP- (cleaning in place) and removes the need of sample taking. A proof of concept and preliminary results, measuring protein precipitation, are presented.
Y1  - 2018
SN  - 1613-2041
VL  - 71
IS  - 5/6
SP  - 49
EP  - 55
PB  - Fachverlag Hans Carl
CY  - Nürnberg
ER  - 
TY  - GEN
A1  - Möhring, S.
A1  - Wulfhorst, Helene
A1  - Capitain, Charlotte
A1  - Roth, J.
A1  - Tippkötter, Nils
T1  - Fractioning of lignocellulosic biomass: Scale-down and automation of thermal pretreatment for parameter optimization
T2  - Chemie Ingenieur Technik
N2  - In order to efficiently convert lignocellulose, it is often necessary to conduct a pretreatment. The biomass considered in this study typically comprises of agricultural and horticultural residues, as well as beechwood. A very environmentally friendly method, namely, fungal pretreatment using white-rot fungi, leads to an enhanced enzymatic hydrolysis. In contrast to other processes presented, the energy input is extremely low. However, the fungal growth on the lignocellulosic substrates takes several weeks at least in order to be effective. Thus, the reduction of chemicals and energy for thermal processing is a target of our current research. Liquid hot water (LHW) and solvent-based pretreatment (OrganoSolv) require more complex equipment, as they depend on high temperatures (160 – 180 °C) and enhanced pressure (up to 20 bar). However, they prove to be promising processes in regard to the fractioning of lignocellulose. For optimal lignin recovery the parameters differ from those established in cellulose extraction. A novel screening system scaled down to a reaction volume of 100 mL has been developed and successfully tested for this purpose.
Y1  - 2016
U6  - https://doi.org/10.1002/cite.201650288
SN  - 0009-286X
SN  - 1522-2640 (eISSN)
N1  - ProcessNet-Jahrestagung und 32. DECHEMA-Jahrestagung der Biotechnologen 2016, 12. - 15. September 2016, Eurogress Aachen
VL  - 88
IS  - 9
SP  - 1229
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - GEN
A1  - Ross-Jones, Jesse
A1  - Teumer, Tobias
A1  - Capitain, Charlotte
A1  - Tippkötter, Nils
A1  - Krause, Mathias J.
A1  - Methner, Frank-Jürgen
A1  - Rädle, Matthias
T1  - Analytical methods for in-line characterization of beer haze
T2  - Trends in Brewing
N2  - In most beers, producers strive to minimize haze to maximize visual appeal. To detect the formation of particulates, a measurement system for sub-micron particles is required. Beer haze is naturally occurring, composed of protein or polyphenol particles; in their early stage of growth their size is smaller than 2 µm. Microscopy analysis is time and resource intensive; alternatively, backscattering is an inexpensive option for detecting particle sizes of interest.
Y1  - 2018
N1  - Trends in Brewing, April 8 –12, 2018, Ghent, Belgium
ER  -