MIL-HDBK-1138
Page
Section
4
GREASE TRAPS
4.1
Description .............................27
4.1.1
Configuration ........................... 27
4.1.2
Location ................................27
4.1.3
Discharges to Grease Traps ..............27
4.2
Maintenance Procedures .................. 27
4.2.1
Pump-Out Frequency ...................... 28
4.2.2
Maintenance Specific to Manufactured
Grease-Removal Systems ..................28
Section
5
OIL/WATER SEPARATORS
5.1
Oil/Water Separators ....................29
5.2
Types of Oil/Water Separators ...........29
5.2.1
Gravity Separators ......................29
5.2.1.1
Conventional Gravity-Type Separators ....30
5.2.1.2
Corrugated Plate Interceptors ...........30
5.2.2
Dissolved Air Flotation (DAF) ...........33
5.3
Problems with Oil/Water Separator
Applications ............................35
5.3.1
Frequency and Intensity of Flow .........35
5.3.2
Design Capacity .........................36
5.3.3
Emulsifying Agents ......................36
5.3.4
Periodic Maintenance Practices ..........36
5.3.5
Type of Oil/Water Separator System ......36
5.3.6
Contaminants in Wastewater Stream .......37
5.4
Evaluation of Need for Oil/Water
Separators ..............................37
5.5
O&M of Oil/Water Separators .............40
5.6
Guidance Documents ......................42
Section
6
SEPTAGE MANAGEMENT
6.1
Septage Management Alternatives .........43
6.2
Septage Characterization ................43
6.2.1
Septage Quantity ........................43
6.2.2
Characteristics of Septage ..............44
6.2.3
Comparison of Septage and Domestic
Wastewater Characteristics ..............44
6.3
Monitoring the Quantity and Quality
of Incoming Septage .....................44
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