1.   But at the moment only a few treatment plants in Britain have the equipment to do this.

2.   Demonstrating the cleaning powers of modern sewage treatment plants is something of an obsession for those who work there.

3.   Nauseating odors wafted from the nearby sewage treatment plant.

4.   Nothing is maintained, sewer networks, water pipes, or treatment plants, so health hazards have flourished.

5.   San Diego pulled out of that project last fall, saying it would build its own treatment plant in the valley.

6.   The cost of a new sewer treatment plant?