DSM Biogas

Optimizing the biology in your digester

Let's get more methane out of your substrate

Higher substrate conversion

Biogas producers looking for ways to improve the economics of their plant, face many factors that they cannot influence. For example: future energy prices and subsidy tariffs are uncertain and you may not be able to find lower-cost feedstocks or invest in new equipment. Let’s focus on something you can influence: optimizing the biology in your digester to get more methane out of your feedstock.

Enzymes: a natural solution

In each anaerobic digester, enzymes exist naturally. They play a crucial role in the digester’s biology. They release sugars from the substrate, which microorganisms require as an energy source when converting the substrate into methane. However, the amount of enzymes ‘naturally’ present in the digester is insufficient to provide enough sugars for the microorganisms. This limits the conversion of substrate to gas. 

More biological activity using enzymes

DSM enzymes break down the polysaccharides (long-chain sugars) contained in plant fibres. This results in more biological activity in the digester. Enzymes also break down other complex molecules, so that these can be converted into methane. Overall, a larger fraction of your substrate is converted into what you are looking for: methane.

Conversion benefits of biogas enzymes

  • More methane output (from the same substrate input), or
  • Lower substrate needs (while keeping the same methane output), or
  • Shorter retention time (with the same input and output)

Improved conversion case studies

We have demonstrated higher conversion rates in numerous full-scale digesters and with a variety of feedstocks. For several plants, we have documented the results of using our enzymes in case studies. 

Contact us

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