Making high quality, well preserved silage enables the AD to store quality forage as feedstock, providing a cost effective feed when required.
The challenge is to ensure that energy in the form of valuable sugar, starch and soluble proteins are protected from being lost to aerobic breakdown by yeasts and mould.
Dry matter (DM) loss is often called silage ‘shrink’. When silage shrinks, there is less available silage.
In addition, these dry matter losses are made up of the more valuable nutrients such as sugars, starches and soluble proteins. This leaves a higher concentration of lower-value nutrients, like fibre and ash.
For on-farm biogas plants using crop-based feedstocks, the quality of the harvesting and ensiling processes can be the difference between success and failure.
Having experienced issues with bought-in silage feedstock JJ Power now use a silage additive to ensure that the quality of their feedstock and the performance of their digester remain high.
For crop-fed AD plants,quality of feedstock is the key to efficient biogas production throughout the year.
Tim Elsome, General Manager of FM BioEnergy, explains the importance of creating good silage to ensure you get the highest gas output from your feedstock.
Does your silage have an unpleasant odour? Does your clamp suffer from excessive losses, effluent or mould?
Tim Elsome, explains how crop-fed biogas plants are only as good as the silage put into them – and how you can prevent poor silage from affecting your bottom line.