Link: https://join1440.com/r/8054?user_id=66c4c34d600ae1507592fdf9

Apparently through a largely organic sewage treatment center on deck.

The water is not recycled but discharged after it's cleaned.

Can you provide a source for the direct dumping being the majority of wastewater discharge from cruise ships?

And provide some further context for that saying? It sounds true enough, where did you hear it?
Thanks.

https://scienceinsights.org/where-cruise-ships-dump-their-waste-and-whats-legal/

Sewage which is not comminuted or disinfected may be discharged at a distance of more than 12 nautical miles from the nearest land when the ship is en route and proceeding at not less than 4 knots, and the rate of discharge of untreated sewage shall be approved by the Administration (see resolution

https://www.imo.org/en/ourwork/environment/pages/sewage-default.aspx

Why would a operator pay for hundreds of thousands of gallons of water treatment when they can simply dump it over the side, so to speak?

I'm aware of the 3 mile treated and 12 mile untreated discharge limits, but can't find any evidence that cruise ships dump untreated sewage into the sea more than treated sewage.

If you can change your initial comment to be guideline-informational rather than an unsourced absolute assertion , it can stay up.

Thanks, I try to be careful about accurate information in this com.

Interesting, I didn't realize the sewage treatment process was compact enough to fit onto ships. I thought they just collected it in a massive tank

The discharge of sewage into the sea is prohibited, except when the ship has in operation an approved sewage treatment plant [...] Sewage which is not comminuted or disinfected may be discharged at a distance of more than 12 nautical miles

It seems it is allowed from 12mi then, but the wording is so confusing.

Yea, I was also surprised to find out the primary treatment method was bacteriological, super cool.

I'm pretty sure primary treatment is the mechanical part, which according to the video still happens the nornal way, using a mesh

you mean the initial mesh filter? that seems to only serve the purpose of separating larger chunks or items the bacteria womt be able to process.