Comparison of Different Tank Cleaning Methods

Comparison of Different Tank Cleaning Methods  Assumption : Tank Diameter 60 Meters, Crude Oil        Sludge Accumulation Average 8 cm*          Sludge Volume approx. 200 cu.m*                * Based on tank T5206 Cleaning
Cleaning Method	Manpower (man)	Equipment (day)	Time (day)	Total Man-Day	Percent Oil Recovery  (%)
l. Manual Cleaning	40	0	45	1800	0
2. Mechanical Equipment and    Manual (Steaming and Water Jet)	25	25	25	625	0
3. Warm Water Method using     Chemicals	15	15	15	225	>90%
4. Robotic Mechanical Equipment    with Liquid/Solid Separation	20	15	15	300	70-80%