46.73.00 Residuals Stabilization
46.73.16 Dual Deck Truss-type Floating Digester Covers
46.73.11 Radial Beam Fixed Digester Covers 46.73.12 Dual Deck Truss-type Fixed Digester Covers 46.73.14 Radial Beam Floating Digester Covers 46.73.16 Dual Deck Truss-type Floating Digester Covers 46.73.17 Radial Beam Floating Gas-holding Digester Covers 46.73.18 Dual Deck Truss-type Floating Gas-holding Digester Covers 46.73.19 Digester Appurtenances 46.73.21 Aerobic Digester Aeration Equipment 46.73.24 Autothermal Thermophilic Aerobic Digestion Equipment 46.73.26 Egg-shaped Digesters 46.73.31 External Draft Tube Digester Mixing System 46.73.32 Internal Draft Tube Digester Mixing System 46.73.33 Confined Gas Mixing System 46.73.34 Unconfined Gas Mixing System 46.73.41 Digester Heating Equipment 46.73.63 Residuals Pasteurization Equipment