[Natalia Bourenane]

@sixring_alejandra

[Peter]

The pre-treatment method depends on the specific crop being digested. Not all lignocellulose can be grouped together.

Grasses such as Naiper grass and certain cover crops may only need chopping,

Wheat straw is not very digestible but the digestibility can be improved with mechanical treatments,

Wood in any form has too much lignin to digest anaerobically and requires complex thermal and chemical treatments to extract a digestible form of cellulose.

Do you have a specific feedstock in mind?

[Gurkeerat]

What I have in mind is the Rice Straw.

[Peter]

I am not personally familiar with what technologies are most effective for rice straw.

Mechanical pretreatments to break up fibres increase the digestibility of rice straw, but there may be more effective treatments available.

If you are interested in investigating further, we would start with chemical analysis of the local feedstock, then review the available options and pilot the most promising. When comparing results from studies it is important that digestion trials or BMP tests are performed in a comparable way so that you are sure improvement is really coming from the pretreatment and not differences in digestion conditions.

If you are interested in investigating options further send me an e-mail at peter.quosai@azuraassociates.com.

[Joerg]

Mechanical pre-treatment would be a feasible option.

May European AD facilities that process more fibrous material have been employing impact crushers sch as offered by MeWa/Andritz.