Abstract:
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Proper solids management requires an understanding of the origin of the solids within the wastewater treatment process; the characteristics of these solids; the various methods available for handling, treatment, reuse, and disposal; and the effects of each process on overall plant performance. This chapter presents an overview of these topics.
The solid wastestreams from a wastewater treatment process include screenings, grit, scum, biosolids, sludge, and chemical residuals. The quantity, number, and type of solid wastestreams depend on the characteristics of the raw waste, the type of wastewater treatment processes used, and their unit operations. With the diversity of wastewater treatment processes and waste influents, solids waste streams vary not only in type, but also in quantity.
The revised version of this chapter has expanded on the previous chapter to include discussion of final disposition of biosolids and associated costs. Emphasis is placed on cooperation with regulatory agencies, networking with organizations such as WEF and its Member Associations, and development of information about biosolids constituents, quality control of the biosolids, and public education.
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©2000 Water Environment Federation