Twenty-two Bearbrass-ians had a great morning tour of Melbourne Water's treatment plant at Werribee. Our hired bus deal from Dock Library with driver Danny went like clockwork. However, one of the internal roads at the plant was blocked, so we missed out on seeing the wetlands' bird life.
We started with a briefing by education guide Kim at the headquarters, who explained the vast size (27,000 ha) of the grounds. Then Catherine, an ex-history teacher, joined our bus and guided us around the ponds explaining how each step purified the material to good quality after 30 days  It arrives at rate of 555m litres per day. 
Among the amazing facts
# The main sewage pipes from Melbourne are 4m diameter - enough for our bus to drive inside. Pumping stations at Brooklyn and Hoppers Crossing lift the sewage 30m high.
# Bacteria in ten bio-towers scrub away all smell from the plant
# Workers sometimes discover bones and teeth of ancient megafauna on the bay shores, including teeth from a giant kangaroo
# Aeration ponds are stirred up by big sprayers. They are serviced by "poo-divers" in space-tight suits who can see nothing underwater but service the pumps by feel -- while earning $3000 an hour. These ponds are christened the "Frothing Milo Milkshake" zone.
# In the old days people in Melbourne would lose their false teeth and jewellery down the toilet (after a night's drinking) and reclaim them from the sewage screens at Spotswood near the present Science Museum.
# The 300 bird species have included rarities like American golden plovers that have flown vast distances off-course -- attracting bird-nerds even from interstate and overseas.
# Screening technology is being challenged by latest "forever chemicals" called P-FAS such as used on non-stick frypans
# Melbourne Water curses "disposable wipes" which people flush down the toilet but in fact don't dissolve and create horrible fatty lumps. Attempts to sue the makers to get rid of the false "disposable" label have failed.
After our tour we lunched at Commercial Hotel Werribee (pictured). 
To see more pictures - these from Maryla - click on READ MORE