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Comment by bluGill | Hacker News Reader

The hard part is you cannot ship sewage from cities to farms on the same trucks you used to bring the food in from the farms as sewage contains harmful things you don't want in contact with food.

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Situations like this are exactly why trucks carry containers. You don’t want to reuse the containers for those two things but you can absolutely reuse the trucks.

The trucks cost on the order of six figures, the containers an order of magnitude less.

Sae problem the truck is still moveing both ways just sometimes with empty containers

But it can often do so more efficiently than just carrying one container at a time when they're empty - see this company that's solving the "return container" problem by folding up to 4 containers into the space of one for the return trip.

https://4foldcontainers.com/proposition/

Perhaps but we could be smarter about human liquid waste. Human urine is nutrient-rich and is effectively nitrogen-rich liquid fertilizer.

Wanna help your garden soil in the off-season? Pee in a bottle and dump it in the garden.

You're welcome.

Municipal facilities turn human waste into fertilizer used on farms

Solid waste, yes?

I’m not an expert but I’d be surprised if they didn’t capture and utilize nitrogen from urine.

You can compost sewage and ship dirt back in dump trucks though

all options work out to more trucks (more co2)

"Septic Tanks Pumped. Swimming Pools Filled. Not Same Truck."

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