The wastewater treatment plant
McMurdo Station - Antarctica

Until about 2003, McMurdo's sewage was simply ground up and dumped into the sea. The new plant uses anaerobic bacteria to begin breaking down the sewage, then a long process (still being improved) of aerobic bacteria to further break down the sewage, before the almost clear liquid is strained and then sterilized with UV light. The almost pure water is dumped into the sea, the solids are collected, pressed to get the last water out of them, and then finally dumped into boxes for shipment to and disposal in the United States.

2007