Abstract
Wastewater treatment systems can be classified, in addition to pretreatment, as preliminary, primary, secondary, and tertiary (advanced) treatments. Pretreatment of industrial wastewater is required to prevent adverse effects on the municipal wastewater treatment plants. Preliminary treatment is considered as any physical or chemical process that precedes primary treatment. The preliminary treatment processes may consist of influent screening and grit removal. Its function is mainly to protect subsequent treatment units and to minimize operational problems. Primary treatment is defined as the physical or chemical treatment for the removal of settleable and floatable materials. The screened, degritted raw wastewater from preliminary treatment flows to the primary clarification tanks, which are part of the primary treatment facilities. Secondary wastewater treatment is the process that uses biological and chemical treatment to accomplish substantial removal of dissolved organics and colloidal materials. The secondary treatment facilities may be comprised of biological reactor and secondary clarification basins. Tertiary (advanced) wastewater treatment is used to achieve pollutant reductions by methods other than those used in primary and secondary treatments. The objective of tertiary wastewater treatment is to improve the overall removal of suspended solids, organic matter, dissolved solids, toxic substances, and nutrients.
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© 2006 Humana Press Inc., Totowa, NJ
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Shammas, N.K., Chang, CC., Wang, L.K. (2006). Tertiary Microscreening. In: Wang, L.K., Hung, YT., Shammas, N.K. (eds) Advanced Physicochemical Treatment Processes. Handbook of Environmental Engineering, vol 4. Humana Press. https://doi.org/10.1007/978-1-59745-029-4_6
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DOI: https://doi.org/10.1007/978-1-59745-029-4_6
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