Gardd Fotaneg Genedlaethol CymruNational Botanic Garden of WalesNational Botanic Garden of Wales

Living Machine

We recycle waste water in our Living Machine

Sewage, and stuff that’s gone down the sink in our restaurant, is pumped into a big underground tank in the Living Machine. Whilst the solid sewage drops to the bottom of the septic tank, the watery top is pumped down to a big pond in our Conserving Our Future Zone. How does this work? Here, tiny creatures eat the nasty bits. These bacteria need lots of oxygen – so we pump air across the gravelly floor. This fairly new technology is called ‘forced bed aeration’.

Tall reeds help control water flow. Bacteria also attach themselves to reed roots – so increasing bacteria numbers.

Where does all the water end up?

It waters trees in a nearby field which we intend to use to fuel our biomass boiler.

If you’d like to know more, ARM Group Ltd installed this new technology.