EXPENSIVE MUD

Hokitika Guardian, 27 February 1933, Page 8

EXPENSIVE MUD

WATER TREATMENT COST.

£l2O A DAY IN BRISBANE.

Although the muddiness of the Brisbane River at Mount Crosby pumping station lias diminished a little; eight tons of sulphate of alumina a. day, costing about- £l2O, is still being used to dear the water before filtration. Heavy rains over the alluvial farm lands of the Lockyer districts always increase; the turbidity ' of the water greatly, and in past years have cost the Brisbane City Council up to £3OOO for sulphate of alumina as a coagulant, Mud is now being extracted from* the water at the rate of between 300 and 400 tons a day. Although such a large quantity of the coagulant was being used, the chief engineer of the water supply service, MT t 7. E. Bush, said recently that it

! was a very small quantity in the mil- ! lions of gallons of water treated daily, i 'Large quantities of sulphate of alumina i settled tot ha bottom in the sodiinenta--1 Lino' tanks, to he drawn oft with the mud. Practically none of the chemical was left in the filtered water finally delivered into the Brisbane mains. The quality of the water supplied to the city was not affected by the chemical treatment.