[kolinko]

Good math.

Another way to ballpark this - the airport tank holds 500 liters of spirulina. Algae extract around 0.5kg co2 per 1000 liters ( https://mdpi-res.com/d_attachment/sustainability/sustainabil... ).

So this tank removes around 0.25kg of co2 per day.

By comparison, an average human exhales 1kg co2 per day. So you need four of those tanks to offset a single passenger passing by.

This does virtually nothing for the air freshness, and is possibly not even carbon negative if you were to count emissions from the device cleanup and algae storage.

Green washing at it’s finest.

[domoritz]

Wouldn’t it offset one passengers CO2 for a whole day and not just a single passenger passing by? I’m sure that’s what you mean but the wording is a bit confusing.

[stavros]

It sounds like it would offset one person staying in the airport for a quarter of a day, yes. Though, with how many people pass through an airport, it means that this would do, instead of almost nothing, four times almost nothing.

[majou]

Really it's about the average occupance of the airport over 24h, which is going to be far greater than 0.25.

[ac29]

I would assume the electricity used to power the pumps and lights ends up emitting substantially more than 250g of CO2 per day as well.

[dylan604]

If only there was a large parcel of land nearby to an airport terminal where a renewable power source could be installed. Hmm, where could we find a large piece of relatively flat land with little to no trees to shade the sunlight? Hell, you could even cover the remote parking areas bringing extra value by providing covered parking and still leave the majority of that flat, cleared, open space unadulterated.

[mwint]

I’m guessing they don’t want to put stuff in the areas around runways, because that’s where planes go when something bad happens. I wouldn’t want to be escaping a plane directly into a chopped-up field of HV solar panels.

[scns]

> By comparison, an average human exhales 1kg co2 per day. So you need four of those tanks to offset a single passenger passing by.

Passing by takes less then 24 hours.

[nerdponx]

"per day" is a rate and can be applied to any unit of time. 1kg per day is equivalent to 1/86400kg per second (1/(246060)). Math works out the same either way.

[dylan604]

Someone must have missed the news stories of airlines preferring to cancel flights leaving travelers stranded in airports for extended periods of time.

Seems like 24 hours in an airport is becoming routine /s

[landemva]

And the PIT airport is under construction with passenger areas being replaced with removal of the mini-train. I hope they didn't pay for this green washing demonstration.