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Browse process flow diagram templates and examples you can make with smartdraw. This chapter elucidates the technologies of biological and chemical wastewater treatment processes the presented biological wastewater treatment processes include 1 bioremediation of wastewater that includes aerobic treatment oxidation ponds aeration lagoons aerobic bioreactors activated sludge percolating or trickling filters . Wastewater treatment wastewater treatment primary treatment primary treatment removes material that will either float or readily settle out by gravity it includes the physical processes of screening comminution grit removal and sedimentation screens are made of long closely spaced narrow metal bars they block floating debris such