Laboratory fermentation

Do you know your methane potential?

AMPTS II – Lab fermentation with precise on-line data acquisition

Fundamental knowledge about fermentation rates and the methane potential of specific substrates is essential for the optimum operation of fermentation plants of all types.

AMPTS stands for Automated Methane Potential Test System. This experimental unit makes possible the automated acquisition and evaluation of gas volume flows which arise from the anaerobic breakdown of very varying substrates. In this way, with modest laboratory effort it is possible to measure gas production and breakdown rate, and from this to estimate and calculate important operating characteristics such as well time, type of substrate used, mixture ratio of the substrates used, and substrate preparation.

AMPTS II is based on the principles of conventional systems for determining gas potential. The lab fermenter and CO2 fixation components are supplemented by on-line volume flow measurement, and automated data acquisition and evaluation.

NEU AMPTS und neue Motoren

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Functional principle

AMPTS II is based on the principles of conventional systems for determining gas potential, and so its results are comparable with all traditional methods. This device conforms with directive VDI 4630 on the fermentation of organic materials. The lab fermenter and CO2 fixation components are supplemented by on-line volume flow measurement, and automated data acquisition and evaluation. This procedure replaces the classical batch trials efficiently, and in a way that saves resources. Once it has been started, the experiment runs for the whole of the fermentation period, without the need for human intervention. The current data is available on-line at any time.


Advantages of the AMPTS experimental unit

–› Reduced expenditure of time and effort, thanks to automated process

–› On-line acquisition and real-time evaluation of the entire bio-methane production and kinetics

–› Integrated measurement of pressure +temperature, and standardisation of the measured values

–› User-friendly operator interface for the presentation of current data

–› High data density for the determination of parameters for process kinetics

–› Web-based software via integrated server

–› Access and control from any PC is possible, regardless of location

–› Data available in standardised format (Excel, csv) for further processing

–› Simple to maintain, low effort

–› The current market leader as a system solution


Technical Details

Laboratory fermentation unit: Heater bath including glass bottles and stirrers

–› 15 Laborglasflaschen a 500 ml

–› Reactor mixing: mechanical, adjustable intervals and rotational speed (max. 140 rpm) –› Size of water bath: 53 x 33 x 24 cm –› Temperature control: up to 95 °C (+/- 0,2 °C)

CO2 fixation

–› 15 x 500 ml glass laboratory bottles

–› Fixation solution: NaOH, 3M (not included)

–› Fixation effectiveness: > 98 % at 0 to 2 l/d biogas

–› Size of the unit: 44 x 33 x 6 cm

Volume flow measurement

–› Principle: Gas volume counter

–› up to 15 samples run in parallel

–› Measurement range: 0.01 l/d to 20 l/d

–› Air pressure and temperature sensor including integrated data acquisition (max. capacity 2 x 10^4 methane gas release cycles)
–› Reproducibility:

–› Size of the measurement unit: 55 x 44 x 18cm

Data acquisition and evaluation

–› Data acquisition: integrated server via web-based software

–› Access and remote control from any PC possible via network

–› On-line real-time display of gas volume flow and accumulated gas volume

–› Standardisation of gas volume and gas volume flow

–› User-friendly guidelines on carrying out experiments

–› Data export: Excel and csv


Substrate analysis

The fermentation process in a biogas plant is very complex. The quality of the biogas depends on the substrate, and is therefore an important cornerstone for the efficiency of a biogas plant. A substrate analysis makes it possible to investigate problems in the process chain in good time, and to ensure a problem-free fermentation process.

With the aid of the AMPTS II, a substrate analysis is simple and user-friendly to conduct. Biogas plant operators can therefore determine the true methane potential of their input materials, and can compare different pretreatment alternatives. Even agricultural wastes, foodstuff wastes, industrial waste water, and sewage sludges can be investigated for their biogas potentials.

The production of bio-methane is measured continually, and the values are standardised by means of permanent temperature and pressure correction.

Even sample weighing is very simple to execute. A sample weight field is integrated into the software, and so human error is precluded.


Are you interested?

We offer you the opportunity to access an AMPTS II system on-line, and to become familiar with its operation and functioning. Request your access data from us.


Bioprocess Control not only offers the AMPTS II, but following products:

–› µFlow for measuring low gas flows in the range 20 to 4.000 ml/h

–› Endeavour for measuring the biogas yield in 2 L laboratory glass bottles

–› BioReactor Simulator for simulating at laboratory scale anaerobic fermentation processes in a continuous mode of operation

–› Continuous stirred tank reactors (CSTR) specifically designed for scientists and process engineers to simulate full-scale fermentation processes in laboratory- or small pilot-scale

Don‘t hesitate to ask us for further information.