5.1.5 Water Treatment Facility Design - Mass.gov
5.3.6 Direct Filtration. 5.3.7 Deep Bed Rapid Rate Gravity Filters. 5.3.8
Biologically Active Filters. 5.3.9 Membrane Filtration. 5.3.9.1 General Information.
5.3.9.2 Pilot ..... The use of submerged orifices is recommended in order to
provide a volume above the orifices for storage when there are fluctuations in
flow. Outlet weirs ...
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