3 Municipal Wastewater and Sludge Treatment
primary sedimentation, and biological treatment because it is the most common method (Figure 3.2). Elaboration on these terse descriptions may be found in sources such as Henry and Heinke (1989) and Metcalf and Eddy (1991). Preliminary Wastewater Treatment Preliminary wastewater treatment ordinarily includes screening and grit removal. Waste-water
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