Every digester is a serious piece of highly technical civil engineering.
The Gold Series Digester is based on a simple concrete tank, rectangular in section and finished with portholes, fittings and insulation. This can be built by professional concrete engineers with local labour in under a month from our detailed plans which must be purchased from Practically Green - usually after a site survey. Typically the bottom of the tank is 2 meters or 2.5 meters below soil level and the top 1 meter is above soil level. This reduces the stresses on the structure. Gas extraction indeed the construction can be used where any tank contents needs temperature and headspace gas control and where there is a need for easily maintainable roof mounted equipment at more or less ground level.