Upper Ruvu

Upper Ruvu treatment plant

The intake of the Upper Ruvu plant is located 65 km west of the commercial capital, Dar es Salaam. Raw water is pumped to treatment works 6 km away at Mlandizi. The first development of this scheme with a capacity of 18,000 m3/d occurred in 1959 and has been expanded in stages to reach 196,000 m3/d. The plant comprises the following:-

• Intake on the Ruvu River: First intake built in 1956, another in 1991. Minimum recorded flow in the Ruvu River at the intake site was 1.72 m3/s in January 1961, and the maximum flow in April 1983 reached 1180 m3/s. The design and operating capacity of the intake is 2.21m3/s.

• Raw water pumping station: Single compartment sump receiving raw water from the grit chamber overflow, four vertical pumps of discharge 0.37 m3/s (3 working + 1 standby), and head 66 m, total pumping capacity 1.1 m3/s.

• Raw water pumping mains: 3 welded steel mains of diameters ranging from DN 350 to DN 760 mm in a distance of 6 km.
• Chemical room: Chemicals dosed into a single raw water main.
• Clarifiers: 32 units of up-flow solids contact type, dimensions 7.5×7.5×5.5 m depth each, total capacity 1.1 m3/s.
• Filters: 15 units of rapid gravity sand filters of Paterson Candy type.
• Disinfection: Pre and post chlorination gas.
• Clear water tanks: 2 compartment reinforced concrete circular tank adopted on ground, dimensions 40 m diameter and 4.5 m height, total capacity 5,450 m3.
• Clear water pumping station: 4 horizontal pumps (3 duty + 1 standby), of discharge 0.316 m3/s and head 205 m (operating head 155 to 170 m), total capacity 0.95 m3/s.

System upgrade (2011-2015)

The plant has recently been expanded to cater for increased water demand in is area of service thus increasing the treated water output from 82,000 to 196,000 m3/d. The expansion work has been completed and the new plant is on full production since March 2016
The new additional water pipeline to transfer the additional 114,000 m3/d (total flow 196,000 m3/d), is now operational.

The project was inaugurated by the President of the United Republic of Tanzania, His Excellency Dr. John Pombe Magufuli