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5.2.2.5 Grinding
Grinding, even though not common, can be used for grinding larger matter in the
sewage to safeguard the treatment units and operations in treatment system.
5.2.2.6 Flocculation
Flocculation in WWTP is essentially the same as that explained in WTP. Flocculation
is done where wastewater stream has suspended solids that cannot be removed by
plain sedimentation.
5.2.2.7 Primary Sedimentation
Primary sedimentation is required when the wastewater is having sufficient settleable suspended solids as in sewage. This operation can be excluded in streams from
industries like confectionary manufacturing units, which have more of dissolved/
colloidal solids. The settled solids will be removed continuously to make space for
newly entered solids and to avoid creation of anaerobic conditions that make the
settled solids shoot up. Figure 5.7 shows a view of primary sedimentation tank.
Fig. 5.7 View of primary sedimentation tank
5 Water and Wastewater Treatment
5.2.2.5 Grinding
Grinding, even though not common, can be used for grinding larger matter in the
sewage to safeguard the treatment units and operations in treatment system.
5.2.2.6 Flocculation
Flocculation in WWTP is essentially the same as that explained in WTP. Flocculation
is done where wastewater stream has suspended solids that cannot be removed by
plain sedimentation.
5.2.2.7 Primary Sedimentation
Primary sedimentation is required when the wastewater is having sufficient settleable suspended solids as in sewage. This operation can be excluded in streams from
industries like confectionary manufacturing units, which have more of dissolved/
colloidal solids. The settled solids will be removed continuously to make space for
newly entered solids and to avoid creation of anaerobic conditions that make the
settled solids shoot up. Figure 5.7 shows a view of primary sedimentation tank.
Fig. 5.7 View of primary sedimentation tank
5 Water and Wastewater Treatment