Anti-Terrorism Shitwater-Recycling-System

In Stockholm bauen sie Sensoren in die Kanalisation, um dort Abfälle von Bombenbastlern im Scheißwasser zu lokalisieren.

But sewer systems have been earmarked for a new use: the fight against terrorism is moving underground. "We have a bunch of electrodes, and immerse them in the sewage," explains Hans Oennerud […] The devices can detect the chemicals that are used to make homemade explosives, which, as Dr Oennerud explains, are likely to end up in the wastewater.

BBC: Sewer sensors to sniff out bomb ingredients