ABB has won a plant automation contract for the Stonecutters Island Sewage Treatment Works in Hong Kong, one of the largest wastewater treatment plants in the world. When work is completed in 2014 the plant will serve five million people in Hong Kong Island and Kowloon, and treat up to 2.45 million cubic meters of wastewater a day.
Located on Stonecutters Island in Victoria Harbour, the plant is part of a major and ongoing Hong Kong government initiative to improve water quality in Victoria Harbour by collecting and treating all the wastewater produced in the urban areas of Kowloon and Hong Kong Island.
Known as the Harbour Area Treatment Scheme (HATS), the initiative consists of two stages. Stage 1 - which was completed in 2001 - comprises a 23.6 km tunnel conveyance system that transfers sewage from Kowloon and the northeastern part of Hong Kong Island to the sewage treatment works on nearby Stonecutters Island.
Stage 2A, which is currently under construction, will consist of an additional 21 km of tunnels that will convey sewage from the northern and southwestern parts of Hong Kong Island to the Stonecutters Island Sewage Treatment Works. The works will be expanded to provide centralized chemical treatment of all sewage from the whole of the HATS catchment area. A third and final phase – Stage 2B – which is currently under review, will consist of new biological treatment facilities.
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