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Gamuda Berhad (29579-T) • Annual Report 2012
The grit chamber at the Yen So Sewage Treatment Plant (STP)
removes grit carried in by the influent.
Sludge settled out from the Sequence Batch Reactor (SBR) tanks are sent for thickening and then to the
anaerobic digester tanks (picture above) to be digested at a temperature of about 36°C for 20 days.