The ultimate goal of this PHP 4.11 billion project was to treat all wastewater discharging into the three major river systems (San Juan River, Pasig River, and Marikina River) from Marikina City in the Philippines. To accomplish this, Manila Water Company would need to construct a sewage treatment plant with a capacity of 100 million liters of treated water per day and a 23-kilometer sewer network.
The sewage treatment plant will reduce the pollutants that are discharged into the river system and into Manila Bay. The team used SewerGEMS to explore a wide range of possibilities in constructing the sewer system without sacrificing service coverage. The software provided flexibility in planning and design, which helped mitigate environmental issues.
Using SewerGEMS, Manila Water Company was able to reduce the number of pump stations from the originally projected 12 pumps to just three pumps, which significantly reduced the environmental, financial, technical, and social risks involved in constructing the facilities. This reduced the operational cost of the system by PHP 190 million. The initial estimated cost of the 12 pumps, ranging from PHP 7.2 million to PHP 20 million, will also be significantly reduced.
SewerGEMS enabled Manila Water Company to speed project computations and design. The software enabled the team to identify and anticipate potential issues, resulting in mitigation of possible scenarios. SewerGEMS made it possible to shift from one scenario to another with relative ease, given the complexity of the project and the number of factors affecting the planning and design.