Anonymous at Thu, 28 Mar 2024 13:43:39 UTC No. 16101181

>>16101133
because its annoying to purify the H2 Gas from sewage cuz theres fuck loads of other shit which gets released during fermentation of sewage e.g CH4 and CO2 being the major organic products, fuck knows about inorganic products like H2S, NH3, O2, N2, 90% sure that H2 gas is generally considered a byproduct in these fermentation reactions. After looking at some research this process of sourcing H2 from sewage is requires specialist equiptment, preparation/treatment of the sewage like pyrolysis or ionizing radiation to make it worth it, expensive, and also a execution of this concept is relatively new.
Additionally
>H2 yield is 10-5.5kg/Mg Sludge
>Process energy efficiency was found 31.4%–41.2%.
source: https://www.sciencedirect.com/science/article/abs/pii/S0360319923044907
Also proton-reducing microorganisms are not the most effiecient, and to be at their most effiecient need to be in optimimum conditions like pH, Temperature, substrate bioavailability, and suitable electron donors, also depending on what type of sewage is being metabolized the microorganisms always have diverse metabolic pathways which dont release Hydrogen. If you want this to be effective you'd have to turn the sewage pipes into some sort of microbial greenhouse. Not to mention the microbes that do this are extremely experimental and have only been done in lab conditions so if your scaling it up for industrial productions will present unknown challenges

Anonymous at Thu, 28 Mar 2024 14:59:12 UTC No. 16101313

>>16101133
Costs a lot for not a lot of benefit, if you think you can do it for cheap then go ahead.

Anonymous at Thu, 28 Mar 2024 21:51:49 UTC No. 16102059

>>16101133
Many fields are very, very conservative, and if something has not been done the last 1000 years it will not be attempted the next 1000 years. And we have had sewer works since the Roman era, 2000 years ago.
From >>>/diy/pjg I see that sewers accumuate struvite, bit they just get rid of it instead of using it as a valuable source of minerals. Again, they have not done this before and that will not do it either. And it is the same with hydrogen.

So when one day a new Elon Musk figure appears and secures exculsive rights to struvite and hydrogen, the impotent and the incapable will moan that everyone could have done that. They just didn't do it themselves, for reasons.

Anonymous at Thu, 28 Mar 2024 22:01:48 UTC No. 16102079

because it's a really small gain
it's like sifting through an entire desert for gold nuggets some african king dropped 500 years ago
you'll find gold but melting down all the queen's jewelry would have been faster. Here's that's analogous to obama killing innocent civilians for oil.

Anonymous at Fri, 29 Mar 2024 00:28:56 UTC No. 16102377

>>16101133
>Why don’t we collect hydrogen gas from sewer gas or use proton reducing microorganisms in aeration tanks to break down sewage and release hydrogen gas?
Because that's retarded. It's much cheaper to do steam reforming of natural gas.

Anonymous at Fri, 29 Mar 2024 07:56:36 UTC No. 16102960

>>16101133
Why aren't sewers emptied onto fields, to replace irrigation and fertilizer?

Anonymous at Fri, 29 Mar 2024 22:07:12 UTC No. 16103859

>>16102960
There are rules about bacterial cultures and where they can be used. Bacteria from human waste is quite restricted, and you also risk waste runoff to ground water, lakes and the sea where other people can be exposed to the human adapted bacteria.

Anonymous at Sat, 30 Mar 2024 03:17:38 UTC No. 16104294

>>16101133

We do. Oakland/EBMUD does this. Many other utilities also do it, any some gas refineries do it as part of their production processes.

https://www.ebmud.com/about-us/news/press-releases/ebmud-pilot-program-generates-clean-energy-water-pressure-its-water-pipelines

Next question.