Pretreatment Options


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Pretreatment Options
Pretreatment OptionsSolids are removed from primary and sedimentation tanks after being pretreated to facilitate pumping and subsequent handling. The most common pretreatment processes include degritting, grinding, and screening. Grinding and screening are becoming more popular as facilities strive to increase the quality of their biosolids.
Degritting Grit typically can be removed more easily and efficiently from raw wastewater rather than from the primary sludge stream. So, current design practice favors installing grit-removal and -processing facilities at the headworks, where raw wastewater first enters a WRRF. This practice reduces wear on influent pumping systems (if grit remova…
Citation
The Water Environment Federation (WEF): Design of Water Resource Recovery Facilities, Sixth Edition. Pretreatment Options, Chapter (McGraw-Hill Professional, 2018), AccessEngineering Export