Going Off Grid By Creating Biogas From Your Loo [Toilet]

Irene Portelli • Jun 16, 2024

First Time We Heard About This There Was 30mins Of Hmmmmmm

When you think of it, we waste a lot of things in our modern day systems due to inefficient designs of water, waste and energy.


One of the biggest challenges ahead of us due to climate change is water security, we're getting hotter, we have a larger population in regional and remote communities due to the cost of land and houses being cheaper than in our capital cities, slightly less now but still better, but infrastructure can't keep up.


Albanese announced we are building 1.2million houses in Australia to help with the housing crisis which has been contributed to by the increase of single house holds due to a high divorce and seperation rate due to COVID.  We're also having the 4th wave of feminism where women would rather be on their own than settle.


But he stated we need to wait for the infrastructure to be built to support that development but he's using old school thinking for new world solutions and the math just doesn't add up. 


So.  We have bigger lots of land in general in remote areas and the HomeBiogas system is perfect for our climate so it's a perfect fit to trial as an energy source for going off grid with our Passive Houses.


There is this big drive for innovation but the reality is a lot of people have been working on getting away from the linear system for decades, since the 70's in fact and that means simple but effective designs have been used and working through those times.  But biogas has been used for over 8 centuries so it's not a new innovation it just needs simple to use processes and there are exciting options here and coming.


In fact there is only one in the domestic market, more in the commercial market though..


Which means there is a business opportunity for plumbing companies to use their R&D tax incentives to develop a domestic solution.  There is a lot of commercial Biogas but the domestic market is severely lacking in this innovation.



This Video Started A 2 Year Journey On Biogas Research

Only 1 Brand Does Domestic HomeBiogas


Home Biogas - an Israeli company.


The only thing we don't like about it is the large footprint the external bladder has, but we're in especially for the fact that our wee has all the nutrients our garden needs to thrive.


Which means a lot less trips to Bunnings.     


Small blocks, big houses, may be deterred to invest in one of these.   


There are others, submerged tanks that are available through Engineers Without Borders, but not in Australia.    Even though we have pestered them at least 3 times they haven't shared their designs.  Which we did offer to pay for each time we built one, but alas, no replies to our emails.....


These are submersed and the more suburb friendly option as you are giving up a fair amount of space for the HomeBiogas system but it is where we are going for our first biogas solution.


The best thing to compliment it is a bide as flushing toilet paper is not an option. 


So let's break down their system and how by using your Poo and Wee you can generate gas for your kitchen stove and get off Ergon in FNQ.



Carbon Neutral In Place Solution


Now this system is perfect for tropical locations because it is warm and the foundation of the process of taking our no. 1's and 2's to create biogas is through a process call anerobic digestion.


Anerobic digestion is where bacteria break down matter and in the process it creates a methane gas that is captured.  While not having a zero impact on the ecosystems, biogas is carbon-neutral. 


It's made up of an input - toilet, output - the gas for the bench top burner and a slurry.




Short History Of Biogas - It's Old School But Works


This anaerobic process of decomposition (or fermentation) of organic matter happens all around us in nature and has been happening for a very long time. The bacteria that break down organic material into biogas are some of the oldest multi-celled organisms on the planet. Human use of biogas, of course, doesn’t go that far back. Anecdotal evidence traces the first uses of biogas to the Assyrians and the Persians in the 10th and 16th centuries. More recently, the 20th century has brought about a renaissance of both industrial and small-scale biogas systems.

Bio Toilets


We have been lurking around this brand for about 7 years so we're excited to road test it in 2024.


We figure that with electrification and the efficiency of air friers changing our cooking habits that we don't need as much gas as we used to.  We don't have a pipeline of natural gas up in Far North QLD and we get rid of a problem with the left over waste that Council has.


TBH the best use of centralised waste systems is to put in a commercial size anerobic digester and we would be getting the whole city to Net0 By 2030 and getting rid of the morning dump issue that leads to a need to increase our capacity as the city grows to double the population in Cairns by 2050.




By Irene Portelli 16 Jun, 2024
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