Obstacles to the use of ordinary municipal sewage for power include its high initial moisture content, which requires potentially expensive drying; its relatively low fuel efficiency, even after drying and other treatments; and the possibility of pollution from burning other materials in sewer systems.
However, the OLR of 3 gVS/L used in the present study did not inhibited the digestion process and resulted in gas production comparable with ordinary municipal sewage sludge in Sweden with an average gas production of 160 to 350 m37]H4/tonne VS[37] 37].
If an ordinary citizen were dumping his sewage into someone else's drinking water, there would be an outcry and demands that the authorities immediately stop the pollution.
Or, to get back to our earlier metaphor, as if you could compress the entire city's sewage through a single ordinary water pipe.
And non-state players, from digital vandals to terrorists, will be casting an appraising eye, if they haven't already, at the computers that monitor and control more ordinary but nonetheless critical systems: water treatment and distribution, sewage, oil and gas pipelines, electrical transmission lines, wind farms and nuclear power plants.
City environmental officials said, however, that ordinary filth might have been the culprit -- a raw sewage leak into the lake at the same time made the post-mortem conclusions unclear, according to a report by the city's Department of Environmental Protection.
An initial $160 million effort to repair Iraq's almost completely dysfunctional sewage plants and water systems is still several months from having an impact on ordinary Iraqis, said Tom Wheelock, director of Iraq infrastructure programs for the United States Agency for International Development.
Three reactors, ordinary, greenhouse, and solar, were constructed and tested to compare their impacts on the composting of municipal sewage sludge.
Most ordinary residents of Baghdad have little to say about Dr. Tamimi beyond criticism of the trash-removal services, overflowing sewage mains and chewed-up streets.
