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How difficult to fix anaerobic digestion process in operational plant?
How difficult to fix anaerobic digestion process in operational plant?
If the project is operational and has issues. How difficult it is to fix it? What are the best case and worst case scenarios have you seen in your practice?
@ibbk_michael @azuraassociates_trisha @azuraassociates_peter
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If a project is operational and is having issues with gas quality and or getting stable gas production, and is still producing biogas the biological health may be able to recover with some operational optimization looking at factors like feedstock, nutrition, ammonia, sulfide, heating, and mixing.
If a digester is being fed and has stopped producing gas or has become acidified it may have reached a point where the digestate is too toxic for methanogens to recover. In this case the digester may need to be partially or completely emptied and reseeded.
A digester might also need to be cleaned out if a thick crust has accumulated in the digester, if the digester has filled with grit, or if tank walls or submerged mixers need to be repaired.
The seeding and startup process is a very sensitive time for the digester, it can be accomplished in as few as 8 weeks, but only with a clear plan, access to seed biomass, and close bioprocess monitoring to keep the startup on the right track.
If plant is operational and has faced issues, it’s simple if plant operational data maintain up date and noticed issue at early stage.
Mostly fixing issue and time required is depend on issue we faced,
Some of possible:
1. Gas quality:if it’s sudden in gas quality then problem in feedstock,
2.if it’s imbalance reaction: raise of Volatile acids, then it’s variation of loading rates.
These are comman process issues when plant upset or occur issues all of sudden even all of mechanical units are working.
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