Digester insulation

Submitted by Nick Chase on
Last changed on 20 Oct, 2018 - 18:30

Table of content

  1. Spray Foam
  2. Straw Bale

In temper or cold climate the digester needs to be insulated because the Archea need to stay at the temperature optimum of about 37°C.

There are several types of insulation arround.

Spray Foam

Spray foam is a simple type of insulation. All the digester is covered in it. The insulation value depends on the material used. 

Straw Bale

Straw bales are a very good natural insulation material. When sourced from 50 kilometers benear your digester there is nearly no carbon footprint on it. With an k-Value of about 30 this natural material is perfect for a sustainable digester. 



Hello Nick Chase. You might want to double check the K value for straw bale... Assuming you're using W/mK units, 30 is a very off-value. Maybe you meant R value?

Hey, thanks for pointing that out. I meant R.

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