This was the very first anaerobic digester tank we lined, being a site cast concrete tank. A protective tank lining was required in the gas space of the anaerobic digester to protect the concrete from hydrogen sulphide and biogenic sulphuric acid.
THE SOLUTION – Anaerobic Digester Tank Lining – Hilliam Farm Lancashire
The concrete was first prepared by method of high pressure water jetting to remove surface contaminants, mould release and laitance.
To fill the large amount of blow holes in the concrete surface a cementitious grout coat was first applied as paint alone will not fill blow holes. This provided a surface suitable to apply an epoxy tank lining to.
Once prepared all surfaces to be coated were primed using Remmers Epoxy MT100 moisture tolerant epoxy primer. This was followed by two coats of Remmers Epoxy Universal tank lining system which is specifically designed for anaerobic digester linings. This material can crack bridge to 0.2mm which is the design crack width for these style of tanks. This tank lining material has over 20 years of case histories in anaerobic digester linings.
As per our usual quality assurance the completed tank lining was spark tested to ensure the lining was free from pin holes. Where found these were touched in by brush.
A similar case study of the this methodology can be seen here – https://www.corrolesseastern.co.uk/hydrolysis-tank-lining/