One of the last jobs was to set up an ozone tester. The company has a new ozone unit that generates 50g of ozone per hour. We needed to see how good it works so we set up the unit with a test pump, piped it to a 1kl tank, then filled the tank with 900 litres of water, 1kg of lawn fertilizer, and a generous shovel full of pigeon poo, and let it stew in a warm shed.. That should be nicely stinky by the time we return on the 3rd. Then we will fire up the unit and see how long it takes to kill the smell - no smell = no anaerobic bacteria.
Hopefully the Police won't break into the shed looking for a body.
Note to steve3: We will have to cover the tank outlet or we'll gas ourselves with ozone.