1.   An acrid miasma came from the sewage plant.

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.   Sewage plants that turn sludge into safer materials certainly help the environment, but they do release some chemicals.

5.   Should we close down sewage plants because they are not absolutely perfectly clean?

6.   The city is upgrading the sewage treatment plant.

7.   The effluvia from local sewage treatment plants polluting the river.

8.   Methane from the sewage treatment plant in Amsterdam East may be used similarly and the biological residue will be reprocessed into compost for farms and gardens.