46 73 00 Residuals Stabilization
46 73 41 Digester Heating Equipment
46 73 11Radial Beam Fixed Digester Covers46 73 12Dual Deck Truss-type Fixed Digester Covers46 73 14Radial Beam Floating Digester Covers46 73 16Dual Deck Truss-type Floating Digester Covers46 73 17Radial Beam Floating Gas-holding Digester Covers46 73 18Dual Deck Truss-type Floating Gas-holding Digester Covers46 73 19Digester Appurtenances46 73 21Aerobic Digester Aeration Equipment46 73 24Autothermal Thermophilic Aerobic Digestion Equipment46 73 26Egg-shaped Digesters46 73 31External Draft Tube Digester Mixing System46 73 32Internal Draft Tube Digester Mixing System46 73 33Confined Gas Mixing System46 73 34Unconfined Gas Mixing System46 73 41Digester Heating Equipment46 73 63Residuals Pasteurization Equipment