I'm however curious about the required parameters (e.g. free volume, retention time, total area, flow speed, and whatever else is rlevant) a trickle filter should have for full blackwater treatment, either separately from greywater or all waste water together.
And then choosing to treat it partially or entirely. That depends on the costs implied.
But first I'm aiming to find a cheaper (investment & energy) DIY alternative to residential aerated sludge plants comercialised here.
A trickle biofilter can be such an alternative?
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