Biogas Bag for Storage
Vertical Biogas DIgester Design
Source: Joel Canaria
Observe a typical design of a digester.
Inlet - feeding occurs here having the largest diameter among all.
Gas outlet - biogas produced from the process goes out thru here connected to external storage.
Overflow - where slurry displaced by a new feeding goes out thru here.
Stirrer - to make sure agitation takes place. Optional for some practitioner.
Drain - to let the accumulated sediment to flow out thru to be discarded after operating for sometime.
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:
Need Biogas Now?
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 GroupBiogas digestate as fertilizer
Filtering biogas with water to reduce its carbon dioxide content
Filtering biogas with water may fulfill two needs:
- Biogas mostly consist of CH4 (methane) and CO2 (carbon dioxide). So, filtering with water could lower the percentage of CO2 in your biogas so that it has more CH4 with higher calorific value and shorter time for cooking. Higher CO2 percentage mean you may have much volume of biogas but with little percentage of CH4 end up with longer cooking time. Only CH4 is flammable and not CO2.
- Lower CO2 content in your kitchen when cooking inside own house mean healthier environment.
Leak test for biogas digester
Actually leak test should be done before actual run or after you finished fabricating the digester.
Or if you want to perform in the middle of process by putting soap water at joins to see whether are there bubbles formed.
DIY Biogas: Make and Use Your Own Renewable Natural Gas
Understand how to craft a recipe to make your own renewable energy substitute for natural gas and propane.
DIY Biogas contains complete plans and parts lists with active links to build two different biogas generators that help you learn, understand, and grow your biogas operation. With this hands-on, minds-on guide, you’ll gain the knowledge and experience you need to convert waste into energy. Whether you’re looking for a unique science project or want to cook meals with your own backyard biogas, this book is the most practical place to start.
With fuel prices and scarcity on the rise, it’s time to re-learn how to meet our own energy needs. Start today and harvest your own local, renewable energy resource tomorrow!