Image for What happens to our sewage?

What happens to our sewage?

Duration: 09:56

Two children meet the animated character Curious Cat, who asks them if they would like to find out what happens to our sewage once it leaves our homes. The children meet an expert who takes them underground to see a sewer. They see the raw sewage travelling through the sewer tunnels before going to explore them. Next, the children visit a sewage treatment plant where they meet a second expert who takes them on a tour that shows them how the raw sewage comes into the treatment plant, how it is cleaned and then sent back into the river. They see solid waste in the sewage being taken out before being told how the microscopic bits of sewage still remaining are eaten by a variety of micro-organisms that use a filter bed made of special rocks. Throughout the tour, the expert takes water samples so the children can compare the dirty sewage that comes in with the clean water that goes out at the end of the process.

Available since: Fri 23 Nov 2012

This clip is from

Curious Cat Steel, Electricity, Sewage

2/3 The children investigate steel and find out how electricity is generated.

First broadcast: 14 Mar 2012

Image for Steel, Electricity, Sewage Not currently available on BBC iPlayer

BBC © 2014 The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.

Added. Check out your playlist Dismiss