Seeking an increase in sewage conveyance capacity? That is exactly what brought about the Ma On Shan 108 Sewage Pumping Station. It stands adjacent to its predecessor. The new Ma On Shan 108 Sewage Pumping Station was built to increase efficiency. After its completion, the existing pumping station became a standby.
Let’s dive into some basic information. The project title is officially “Ma On Shan Area 108 Pumping Station”. The Drainage Services Department is the works department. The Environmental Protection Department is the client department.
The existing Ma On Shan Area 108 Pumping Station sits at the junction of Sha On Street and Sai Sha Road. The new pumping station was built next to it. It lies within GI/C zoning of the Ma On Shan Outline Zoning Plan No. S/MOS/13. The existing pumping station was preserved. So no demolition was needed. The design average dry weather flow is approximately 14500 cubic meters per day. The Pumping Station is a single story building. Its inlet chamber and wet well are underground. They are enclosed with covers.
The location rationale is simple. The Pumping Station is right next to the existing Ma On Shan Area 108 Pumping Station. It’s within the area already reserved for the existing station. This avoids major disruptions. Most existing sewers can be maintained. Nuisance from substantial modifications is avoided. The Ma On Shan 108 Sewage Pumping Station also uses the existing by-pass route. A new by-pass pipe for overflow was impractical.
The Ma On Shan 108 Sewage Pumping Station is a Designated Project. The nearest residential block is Lee Wing House of Lee On Estate. It is about 75 meters away. The Pumping Station has a proposed capacity of approximately 14500 cubic meters per day. This classifies it under the Environmental Impact Assessment Ordinance.
Construction and commissioning took place from November 2006 to December 2010. Operation and maintenance began in January 2011. There were considerations for environmental impacts. Air quality was a concern. Dust from construction activities was possible. Noise from machinery was another issue. Muddy water from construction was also a concern. Landscape and visual impacts were considered. Waste from construction and demolition was managed. Ecology and cultural heritage were protected. Traffic impact was minimal.
During operation, odour was a concern. The inlet chamber and wet well could be sources of odour nuisance. The Pumping Station conveys sewage to Shatin Sewage Treatment Works. This enhances water quality. Emergency sewage bypass into Tolo Harbour is extremely remote. Pumps and fans are potential noise sources. Screenings are generated and disposed of properly.
The Ma On Shan 108 Sewage Pumping Station has neighbours. Lee On Estate is about 75 meters away. Monte Vista and Wu Kai Sha Village are approximately 130 meters away. A property development at Wu Kai Sha Station is about 70 meters away.
Several environmental protection measures were incorporated. Water spraying and wheel washing were used for dust control. Silt removal facilities managed water quality. Temporary hoardings reduced noise. Construction was limited to daytime hours. Waste was sorted for reuse and disposal.
The inlet chamber and wet well are underground to minimize odour. A deodourizer removes odour with 99.5% efficiency. The exhaust faces away from sensitive receivers. Emergency sewage bypass uses the existing route to Starfish Bay. Multiple pumps and screens are in place to prevent bypass. There is approximately one hour of emergency storage. The existing Ma On Shan Area 108 Pumping Station serves as a backup. A dual power supply minimizes power failure. A telemetry system transmits signals to Shatin Sewage Treatment Works.
Pumps are enclosed and acoustic filters are installed to minimize noise. Screenings are enclosed and transported to landfills. The architectural design blends with the surroundings. A green roof design improves the landscape. The Ma On Shan 108 Sewage Pumping Station minimizes environmental impact. It is a vital part of the sewage system.