+34 9300 63137 (Spain) ProCycla Spain
+56 9 32289834 (Chile) ProCycla Chile

Anaerobic Digestion Modeling

The focus of our Modeling and Simulation (ModSim) service concentrates on the analysis of anaerobic digestion (AD) processes, considering all types of data and operating parameters of a biodigester or biogas plant.

Mathematically modeling and simulating the anaerobic digestion process consists of representing different processes by means of equations. Among them are the mass and energy balances of the system and phenomena such as chemical equilibrium, reaction kinetics, inhibition, gas transfer, among others.

At ProCycla we help you solve the design and optimization challenges of your anaerobic digestion plant. We do it through the exploitation of known models or with the development of adapted versions of the models, according to the needs and requirements of each project. The backbone of the service is our SCR® monitoring and control system.

We offer flexibility in the use of software, being able to use both commercial tools such as Matlab® and open source programs (Octave or Phyton).

How can we help you with by using MoDSim?

Prediction of new operating scenarios:

Biogas plants need to know what the biogas production and digestate quality will be under different operating scenarios due to changes in the quantity and quality of organic substrates fed, frequency of addition, temperature, among other factors.

We provide estimates and degrees of confidence of digester operation under these new conditions.

Diagnosis of the current operational status:

In addition to the variables that are monitored in a plant there are countless other variables of importance related to microbial populations and intermediary compounds that are not measured. Using an appropriate model we can know the current status of unmeasured variables, thus anticipating inhibition events, microbial richness and/or accumulation of unwanted compounds.

Operator training:

The operation of biological processes such as anaerobic digestion has particularities that operators should know and master.

For this purpose, mathematical models of different complexity can be used to create simulators that can be used to train operators starting to work in a plant. This training allows to train new personnel entering a biogas plant in a fast, efficient and risk-free way.

Experimental design:

In many occasions it is required to set up laboratory scale trials, in batch or continuous, to test different operating conditions. This leads to extensive set-ups that require significant human, economic and physical resources.

The application of models allows performing the experiments virtually in order to discard the conditions that do not show interesting results and concentrate the experimental effort on those that give promising results.

Digester design and operation:

Factors such as mixing type, intensity, substrate inlet or outlet configuration, which influence digester design, can be evaluated more reliably by using computational fluid dynamic (CFD) modeling and simulation.

In addition to fluid flow, we can incorporate heat transfer, the presence of other species and other phenomena to achieve a more appropriate and complete system analysis.