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MECHANICAL AERATED PRIMARY BIOTOWERS AERATION SECONDARY CHLORINE <br /> SCREEN GRIT SEDIMENTATION BASINS (FINAL) CONTACT <br /> CHAMBER TANKS SEDIMENTATION TANK <br /> TANKS <br /> Removes large Removes heavier Removes settleable Bacteria(bugs)convert Activated slugde process(bugs). Settles&removes activated Disinfects with chlorine <br /> rags,paper inorganics, &floating organics some dissolved organics Bugs convert remaining dissolved sludge-some bugs are returned to to kill disease <br /> &plastic sand,etc &grease to slime layer organics to settleable matter. aeration basins for more work. causing organisms. <br /> Raw ° Treated <br /> wastewater CA° wastewater to <br /> 0 <br /> ° San Joaquin River <br /> oopOo°o° o°o o °o o °o o° ° l <br /> 000 000 coo <br /> Chlorine gas Sulfur dioxide gas <br /> removes chlorine <br /> (dechlorination) <br /> Rag to Grit to Primary sludge <br /> landfill landfill &grease to <br /> anaerobic digesters <br /> Excess bugs to Treated wastewater to <br /> anaerobic digesters agricultural irrigation <br /> during summer months <br /> ANAEROBIC <br /> DIGESTERS CENTRIFUGE <br /> Methane gas is 60° %° Stabilized solids (cake) <br /> (J� ° ° to landfill°o 6e used to heat <br /> digesters <br /> D <br /> excess gas is 66 666 6666 <br /> flared off <br /> Water is separated <br /> from stabilized solids. <br /> Anerobic bacteria have <br /> about 30 days to break Water to <br /> down and stabilize organic bar screen <br /> solids. Methane gas is <br /> G 05110088.01 006 produced as a bi-product <br /> Source:City of Manteca 2006 <br /> WQCF Process Flow Schematic Exhibit 3-5 <br /> Manteca WQCF and Collection System Master Plans EIR EDAW <br /> City of Manteca 3-11 Project Description <br />