Technical University Berlin
Chair of Bioprocess Engineering
Ackerstraße 76
13355 Berlin
Prof. Dr. Peter Neubauer
Tel.: +49-(0)30 314 72527
E-Mail: peter.neubauer@tu-berlin.de
Dr. Ing. Stefan Junne
E-Mail: stefan.junne@tu-berlin.de
Prof. Dr. Winfried Vonau – project manager
Telephone: +49 (0)34327 608-103
E-mail: vonau@hs-mittweida.de
Alexander Hörig – direct contact person
Telephone: +49 (0)34327 608-136
E-mail: hoerig@ksi-meinsberg.de
Sandra Päßler
Telephone: +49 (0)34327 608-118
E-mail: paessler@ksi-meinsberg.de
Dr. Michael Fenske – project manager/direct contact person
Tel.: +49 (0) 3328 33 23 40
E-mail: fenske@teleBITcom.de
Results only available in German.
The purpose of the joint research project is to construct a multiposition sensor for monitoring the liquid phase in biogas reactors. Unlike previous methods the application is focused on the examination of the core of the liquid phase, whereas samples had previously been obtained in nearly all cases from the edge of the reactor. A process analytical tool is to be developed which is suitable for use in biogas reac-tors and which can contribute to an improved understanding of gradients in the core of the liquid phase as well as, more importantly, to an optimised control. This aim is to be achieved by improving microsensors and by the intelligent combination of position fixing and wireless data transmission. The emphasis is on detecting and localising process disruptions at an early stage and drawing conclusions from these disruptions about ways of optimising the mode of operation.
A wireless sensor system is to be developed in the project that has been commissioned. This system will enable a multiposition sensor system to be created in biogas reactors. The sensors are to be capable of being positioned at variable heights by means of a mounting in the head space and are therefore to be used for the data-based, position-dependent description of different parameters over the course of the process. Radio is to be used here for data transmission in the head space as well as for the three-dimensional location of the sensor head during data collection or sampling. The multiposition sensor system module comprises miniaturised sensors which are optimised for use in biogas reactors. The aim is to generate by using the tools described measured data which describes the gradients in reactors and which can lead in combination with a regression analysis to an optimisation of process design and control.
TU Berlin & teleBITcom
The use of radio amplifiers with microsensors that already exist as prototypes is to be tested in the research project especially in field tests at a biogas plant and adapted to requirements. A key component is the creation of a multiparameter measuring probe with miniaturised sensors specially optimised for the application for determining pH value, redox potential as well as, optionally, conductivity. Because of the extreme environmental conditions within the reactor medium under which chemosensory measurements are taken, neither conventional redox nor reference electrodes in particular meet the demanding requirements of the project which include maximising the measuring equipment’s maintenance intervals which are to be made user-friendly. Moreover, a system suitable for the application with transmitter and receiver for positioning and data collection is to be developed. At the same time, a detailed characterisation of the gradients in an actual plant with an open pre-digester is to be carried out. All the relevant process parameters from samples taken in the usual way and additionally from samples taken by lances from the core of the liquid phase are to be determined in the laboratory. This will enable a picture to be built up of the physiological conditions of the cell and critical influencing factors to be determined. Control strategies are to be implemented with the data obtained and the use of the concept as a process analytical tool (PAT) is to be demonstrated in a study.
KSI
Constructing sensors for biogas plants: The task of the Kurt-Schwabe-Institute is to develop a multiparameter probe to determine the pH value, redox potential and, optionally, conductivity under the extreme environmental conditions in the reactor medium. A key problem to solve will be the development of a durable reference electrode.
TU Berlin
The project focuses on the adaptation and further development of microsensors, the integration of radio-based data transmission as well as the recording of conditions in the core of the liquid phase and the evaluation of their importance for process control, with particular emphasis on the effects of the use of biogenic waste materials.
KSI
The project focuses on the adaptation and further development of microsensors, the integration of radio-based data transmission as well as the recording of conditions in the core of the liquid phase and the evaluation of their importance for process control, with particular emphasis on the effects of the use of biogenic waste materials.
teleBITcom
