Digester Cleaning - Why Do it?The most common reason for anaerobic digestion plant digester cleaning by Digester Cleaning Contractors, is to restore digesters to optimum biogas output.
However, it may also be necessary to empty digester tanks simply to inspect them for wear or corrosion, and cleaning may also be needed in order to repair leaks.
When digester tanks are drained there will normally always be a lot of grit, stones, and general trash left in the bottom.
This will need to be removed, and doing this is usually considered to be a specialist job. The reason why the digester operator is well advised not do this using in-house staff is normally due to the health and safety hazards involved.
It is encumbent upon all biogas plant operators globally to ensure that the digester cleaning contractors awarded this work are properly experienced and apply all local regulations both in connection with their work on-site, but also act responsibly to dispose of the materials which are removed from digester tanks during cleaning.
Some older biogas tank installations have to be emptied before worn out mixers and other internally fitted equipment can be replaced.
|Celvac's Mobile Digester Cleaning Rig|
In the UK and Europe the ATEX Regulations apply to digester tanks, due to the potential for there to be explosive biogas in digester tanks after emptying. Each EU country has its own daughter regulations which apply the ATEX Directives in member states. In England and Wales the ATEX Directive is applied within the DSEA Regulations.
In the US the The National Institute for Occupational Safety and Health (NIOSH), is the point of reference for ensuring safety during these works.
A common reason for anaerobic digestion plant digester cleaning by Digester Cleaning Contractors, is to restore digesters to optimum biogas output, however, it may also be necessary to empty digester tanks simply to inspect them for wear or corrosion, and cleaning may also be needed in order to repair leaks.
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Anaerobic digestion is a collection of processes by which microorganisms break down ... Anaerobic digesters can also be fed with purpose-grown energy crops, such as maize. ..... gas scrubbing and cleaning equipment (such as amine gas treating) will be needed to process the biogas to within regionally accepted levels.
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