I would like you to check out this design from a friend, more details please check under the QR code. Usually the blue tank converted as biodigester in a vertical form. This is quite different which someone could try on horizontically.
Source: Jørgen Rasmussen (A Clean New World)
Or for more explanation please refer to below video:
This is so interesting. I would be glad if I could have the video above for expertise.
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