Sunrise aerial overview of the Sha Tin Sewage Treatment Works for Shatin Wastewater Processing

primary sludge wastewater infrastructure sustainable development revitalization rainwater stormwater hygiene bluegreen infrastructure drainage services department sha tin sewage treatment works dsd hk hksar hong kong government ststw ma on shan district 1980s marine environment tolo habour highway aeration tanks effluent quality nutrient removal facility treatment capacity ultraviolet disinfection system relocation to caverns inlet work mechanical bar screen remove solid aerated grit channel grit removal grit classifier sunrise primary sedimentation tank sludge scraping mechanism biological compressed air assimilate organic pollutants surplus activated sludge digester final sedimentation tank uv disinfection anaerobic digestion renewable environment shatin hoi sha tin river shatin enviornmentalfriendly