Maintenance of biodigester

After several years of operating biodigester, the upper layer is full of floating scum. Middle layer is just digestate liquid. The most bottom is where the sediment reside. During maintenance, you may want to take out both layer of semi solid (scum and sediment) so you can start new fresh.

Accumulated scum if not removed, when they are piled up so much will block your gas outlet. This event may cause the biogas pushing down the digestate out towards the feeding inlet. So its good to do spring cleaning after sometime operating. 

The liquid digestate can be reuse since still containing microbes and as long as the pH still the same.

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Digestate or slurry from biogas digester useful as organic plant fertilizer

From waste to useful effluent as organic plant fertilizer. I noticed my chilli plant starts flowering everytime I pour the effluent to the ground below it.

It is very obvious when effluent from biogas digester used onto chilli plant, its flowers bloom significantly thrn producing lot of chillies.

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Inoculum preparation for biogas generation

The most cheapest and easiest way to produce an inoculum is using digestate from working biogas digester. They are consist of active culture with stable activity because consist of varieties of microbes working together or consortium.

Next source is by taking a scoop of slurry or sediment from anaerobic pond. These are also active microbes we can used directly to produce biogas.

If you happen to live nearby cattle farm, dung is another source of microbes that can produce biogas.But to start with cow dung we need to mix it with water and ferment until it mature in which produces biogas.

Do not mistaken biogas with carbon dioxide. Biogas is flammable while CO2 is not.

So to produce biogas you can start with things that already around you.

Want to construct your own biogas biodigester? Click here!

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