Grease separator

Size Calculation2. Sizing the grease separator (NS - liters/second)2.1. Calculating the maximum wastewater flow Q sMethod 1:Q s-Calculation based on maximum wastewater flow during peak kitchen operation measured with a flow metering deviceMeasured flow Q s :......................... ......................... l/s Q s = ......................................................... l/sMethod 2: Q s-Calculation based on types of kitchensThe maximum wastewater flow is calculated for either a) commercial kitchens or b) meat processing plants based on volume and type ofwastewater.a) Commercial kitchenQ s = ......................................................... l/sCalculating maximum wastewater flow Q sV M : wastewater volume per warm meal in liters (l) (See Table 1)EquationInputsQ s =V M x F x M Mt x 3600........... x ........... x ...........Q s = = ...................... x 3600F: Surge factor relevant to of operational conditions (See Table 1)M M : Monthly average of the DAILY prepared warm meals(avg. meals per day)t: Average hours of operation when the separator will bereceiving fat laden wastewaterTable 1 (Types of facilities)Types of commercial kitchensHotel restaurant kitchenFine cuisine restaurant kitchenFast food restaurant kitchenHospital/Retirement facility kitchenMilitary base barracks kitchenStandard restaurant kitchenV M (liters)100505201015F58.520132210M Mt (hours)b) Meat processing plantsQ s = ......................................................... l/sEquationQ s =V P x F x M Pt x 3600V P : facility specific wastewater volume per kilogram meat/sausageproduction in liters (l) (See Table 2)InputsF: Surge factor irrelevant of operational conditions (See Table 2)Q s =........... x ........... x ...................... x 3600= ...........M P : Daily average of meat/sausage production (kg)t: Average hours of operation when the separator willbe receiving fat laden wastewaterTable 2 (Meat processing facilities)Meat processing facilitiesSmall up to 5 large livestock*MediumLargeup to 10 large livestock*up to 40 large livestock**1 large livestock = 1 cow (cattle) = 2.5 pigsV P(Liter)201510F303540M P (kg) t (hours)Page 35