Characteristics of sugar factory wastewater are tabulated and a process using a dynamic anaerobic sludge blanket clarifier is described. Performance date are tabulated for a pilot anaerobic digester having capacity 64 m in 6-8 h at 25 C.O.D. was decreased by 78% and B.O.D. by 82.89%. Dimensions are given for the anaerobic sludge clarifier, filter media and clarifiers. Comparisons of operating costs show that automatic operation of the plant is more efficient than manual operation. Recommendations are made for operation, maintenance and selection of project engineers and consultancy services.