DIY Biogas Digester For Home

Friday, April 15, 2022

Horizontal Biogas Digester Design

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:

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Floating drum system for biogas storage

The system consist of two components:

1. The floating drum that has inlet and outlet for biogas. Inlet will let the biogas into the drum to be stored. Outlet is to let the biogas out when it is needed so should there be valve installed to control the process.

2. The base drum that contained water act as a platform for upper drum to float when there is gas produced. A steel guide installed to make sure the floating drum won't fall to the side.

So both drums are of different volume

a. floating drum is 160 liter

b. base drum is 200 liter

source: Biogas DIY FB Group

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Thursday, April 14, 2022

Biogas digestate as fertilizer

No mistake in deciding to pursue biogas generation. Food waste could be managed well environmentally friendly way. Also the byproducts could also useful for agriculture. After digestion the solid waste leftover could be turned into powder after drying and grinding. Inside its already contained beneficial microbes such able to fixing nitrogen in soil. Or its properties could be enhanced more via biotechnology application towards enrichment and value adding of the existing waste material.

Your effort will be worth it.

But be careful to call your digestate as a biofertilizer make sure it contains beneficial microorganisms (eg. Nitrogen fixing and/or phosphate solubilizing and/or potassium solubilizing, etc) to enhance the properties of the soil where you applied the digestate so that your plant grow better compared to untreated soil. Another thing, biofertilizer should contain enough no. of beneficial microorganism compared to background microflora or otherwise won't show the expected effect if suppressed by other dominant or large no. of other microbes inside the digestate.