The design of Yuen Long Effluent Polishing Plant, a blue-green infrastructure project set to be highlighted by the Drainage Services Department (DSD) during Eco Expo Asia 2023, seeks to increase treatment volume of present Yuen Long Sewage Treatment Works, besides offering recreational spaces to the public.
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To begin with, the project will increase the treatment capacity of Yuen Long Sewage Treatment Works from 70,000 cubic metres to 150,000 cubic metres per day by phase. To this end, the first-time adoption of aerobic granular sludge (AGS) technology over conventional activated sludge systems will improve biological nutrient removal as well as reduce energy usage. A shared renewable energy system comprising Combined Heat and Power (CHP) and photovoltaic panels will be employed to supply part of the energy demand within the plant.
Visitors can view the machineries at work through openings on the façades; image sourced from DSD website
Recreational amenities are introduced to facilitate firsthand learning about the functional and ecological components of the premises, following its proximity to vast wetlands. A promenade running along the eastern side of the development allows visitors to view the machineries at work through openings on the façades. Meanwhile, the roof garden features a bird hide of circular form to provide a panorama of the surroundings. Most of the sewage treatment water tanks are located underground so as not to impede the views. —Construction+ Online
The roof garden features a bird hide of circular form; image sourced from DSD website
Sources: DSD, ECO Expo Asia 2023; DSD, Yuen Long Effluent Polishing Plant
