BIOGAS-CONSULT company brings to your attention laboratory titrator Pronova 2000 is used for automatically measuring the FOS/TAC content at biogas facilities. Facility operators can use this automatic titrator to determine the FOS/TAC content. It is easy to use and delivers a high level of repeatable accuracy. The fully automatic system helps to significantly reduce operational errors. This is important since current results must always be evaluated in comparison to the previous results.
The crucial parameter for assessing the fermentation process is the ratio of volatile organic acids (FOS) and the capability of the fermentation substrate to neutralise acid formation, i.e. the buffer capacity (TAC). TAC means “Total Anorganic Carbon” and corresponds to the equivalent of all the buffer substances contained in the substrate. A rising FOS/TAC ratio means the risk of acidification of the fermenter substrate. Controlling the pH alone is often not sufficient, so that it is important to be able to determine the FOS/TAC values. The relatively simple FOS/TAC analysis enables the early detection of beginning acidification and its avoidance by suitable counter-measures.
The equipment user can use the FOS/TAC 2000 in order to perform the FOS/TAC analysis on his own. The fully automatic system reduces operator errors to a minimum and enables a high repeatability rate. This is important because the most recent result must always be evaluated in light of the previous results. 5 g of fermenter filtrate is necessary for the analysis and must be diluted to 20 g with distilled water. The subsequent titration process is fully automatic. The results for total acids (FOS), the buffer capacity (TAC) and the FOS/TAC value are displayed after a few minutes. The benefits of using the small, compact lab at the biogas plant are obvious: Analyses can be performed more frequently than before. Furthermore, the results are immediately available.

TECHNICAL SPECIFICATIONS
Measuring parameters: FOS/TAC
Design: portable steel sheet enclosure
Display: two-line LC display (pH and temperature)
four-line LC display (FOS, TAC und FOS/TAC)
Measuring principle: pH measurement
Precision: ± 0,01 pH
Measuring ranges: FOS: 1 to 10 g of organic acids per /kg of substrate
TAC : 5 to 20 g of CaCO3 per /kg of substrate
FOS/TAC: 0.05 to 2
Equipment storage temperature: +5 °C to + 50 °C
Equipment operating temperature: + 10 °C to + 45 °C
Amount offer sample: appr. 5 g of filtrate
Dimensions: appr. 405 x 290 x 160 mm (BxHxT)
Weight: appr. 7.5 kg

AwiLAB Digester – Modular Laboratory CSTR Reactor by Awite

The AwiLAB Digester is a high-quality modular continuously stirred tank reactor (CSTR) designed for anaerobic fermentation experiments on organic substrates and biogas research.

Key Advantages:

● Realistic laboratory simulation – ideal for modelling continuous anaerobic fermentation processes.
● Innovative mixing technology – efficient mixing of substrates with dry matter content up to 18%.
● Automated monitoring – includes phase observation, precise gas quality measurement, and automatic process scaling.
● Flexible operation – control via laptop using dedicated Awite software or directly through the device’s intuitive touchscreen.
● Integrated AwiFLEX gas analysis system – enables real-time measurement of gas composition (CH₄, CO₂, CO, O₂, H₂S, H₂, N₂) for accurate process simulation.
● Visual and digital process control – includes sight glasses and precise measurement of gas flow, temperature, pH, and redox potential.
● Graphical data presentation – compatible with AwiCharts software for easy graphical and tabular data analysis.

Available Configurations:

● Standalone version: all components (reactor vessel, gas flow meter, control unit, etc.) are mounted on a single frame.
● Modular version: centralized control and measurement system for up to seven fermenter modules, allowing flexible expansion and advanced scientific testing (zero sample, double, and triple experiments).

Additional Features:

● Automatic feeding, circulation, and discharge system with an eccentric screw pump.
● Hydrostatic level measurement and precise substrate dosing, independent of viscosity.

The AwiLAB Digester is a plug-and-play laboratory system that enables scientists and engineers to focus on research and experimentation while minimizing manual operation.
Developed by the German technology leader Awite, it combines precision, versatility, and reliability for modern laboratory work with biomass and biogas.

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