Monday, July 4, 2022
Renewable Energy News

Backyard aquaponics project powered by sun and wind bears veggies – ABC News

By Staff , in Wind Power , at September 30, 2020

Central Queensland equine dentist Keith Page won’t knock renewable energy and self-sustainability before he tries it, so that’s exactly what he’s doing.

The former mine worker is using a wind turbine and solar panel to power an aquaponics operation at his Alton Downs backyard.

The set-up produces fish to eat and uses the filtered water from the tank to grow vegetables.

“I sit in my loungeroom visualising [solutions],” Mr Page said.

Mr Page said water from the fish tank was processed through two filters before being pumped into the vegetable garden, which was filled with clay pebbles commonly used in hydroponics.

“There’s a bell siphon which, when this garden bed gets quite full, has an airlock in it, and the water forces the airlock out of it and there is a continual flow of water [out of the garden bed],” he said.

Every hour 400 litres of water are pumped into the garden bed from the sump tank, a collection reservoir for the run-off.

With the occasional addition of nutrients, such as iron, the filtered fish water has proved fruitful.

Mr Page said he had successfully grown mint, silverbeet, tomatoes and cabbage, although he was yet to have any luck with peas.

Mint leaves growing in a garden dappled by sunlight.
Mr Page has more than enough mint and has done pretty well with the veggies he’s grown — except for peas.(ABC Rural: Meg Bolton)

Would you like fish with that?

As Mr Page watches the plants thrive, within the 1,200L water tank 60 jade perch fish are growing.

He has three additional tanks to move the fish into as they grow and the project expands.

“At the moment these are only little fellas, sort of 70 millimetres long, and when they develop to the 100mm to 150mm stage I’ll separate them up and put half in the next tank,” he said.

“With this set-up here, when it’s going and it’s full production, you can be self-sustainable.

“I think we can have a fish [to eat] a week.”

An older man with his hands on a solar panel, standing in front of an aquaponics set-up.
Mr Page says his operation is just an experimental one, but it’s laid his scepticism about renewable energy to rest.(ABC Rural: Meg Bolton)

Touch and go process

Mr Page was initially sceptical of the idea of renewable energy, but now he was full of ideas.

Mr Page said his operation could expand to 8 hectares and could easily be adopted by others looking for a more self-sufficient life.

“This is just an experimental exercise,” he said.

“It’s not big enough to be commercial, but to understand something you’ve got to go and do the experimental runs and learn things.