Queensland urban utilities claim that thier wastewater services are so efficient because:
• For $476* each year they remove and treat the wastewater from your home.
• To remove the same amount of wastewater by tanker would cost up to $10,000 per year.
• Queensland Urban Utilities is spending $341.4 million in 2011-12 and $3.2 billion over 10 years to provide high quality and reliable water and wastewater services, both to existing customers and those in expanding residential areas.
*Based on 2011-12 prices for Brisbane.
However, I don't think they have thought outside the box.
If we did not mix our ones & twos**, with water, we might not need all the pumps & pipelines & energy intensive infrastucture.
**An adult human produces about 200 L of poo a year.