The Drainage Services Department has been actively promoting renewable energy and is committed to installing solar power generation systems in various sewage treatment and flood prevention facilities. As of the end of May this year, the Drainage Services Department has installed 32 facilities under its management, including 15 sewage treatment plants and 15 sewage pumps The building and the two flood storage facilities installed solar power generation systems, using the space of the workshop to develop renewable energy.

Among them, the San Tin rainwater pumping station and flood storage tank in Yuen Long have installed three sets of different types of solar power generation systems, including solar trees, floating solar power generation systems, and flexible and stepable solar power generation systems. The rainwater pumping station supplies power. In order to beautify the environment and integrate the ecology, the Department also built an ecological floating island of about 100 square meters in the flood storage tank, and planted flowering plants to attract birds to stay. The Department estimates that the three sets of solar power generation devices can provide a total of 47,000 kilowatt-hours of electricity a year, which is equivalent to the annual electricity consumption of 14 three-person households, and can reduce carbon emissions by about 32 tons per year. If it passes the rainy season test this year, it will study expansion and application in other flood storage tanks.

As the rural villages in Hong Kong are located in low-lying areas, rainwater cannot be drained smoothly, which is likely to cause flooding problems. Therefore, the department launched the rural flood protection plan as early as the late 1980s, adding flood barriers to the villages to prevent rainwater from flowing into the villages. Rainwater collection was also installed The system temporarily collects rainwater in the flood storage tank. When the water level rises to the preset water level, the water pump of the pumping station will automatically turn on to pump the rainwater out of the drainage channel outside the flood control embankment. The San Tin Stormwater Pumping Station and Stormwater Storage Tank is one of the 27 village flood prevention projects currently in operation by the Department. Flooding risk in 7 low-lying villages.

In addition to solving the flooding problem, the Drainage Services Department has also actively used the plant space to develop renewable energy in recent years. Currently, the largest solar photovoltaic system in Hong Kong was put into operation at the Siu Ho Wan Sewage Treatment Works at the end of 2016. Lu Zhenlong, senior engineer of the Electrical and Mechanical Engineering Department of the Drainage Services Department, said that different solar power generation devices have also been installed in the Xintian stormwater pumping station and the flood storage tank. It has the largest area, and the San Tin Rainwater Pumping Station is also one of the places visited by the Department’s ecological conservation guided tour, so we hope to promote the concept of carbon reduction and sustainable development to the public through the installation of solar power generation systems.”