Langat Sewerage Project is one of the Greater Kuala Lumpur anchored project under Ministry of Water, Land and Natural Resources with Jabatan Perkhidmatan Pembetungan (JPP) as the implementing agency managed by Gabungan AJP-MFA as the project’s PMC, and MMC Pembetungan Langat Sdn Bhd as the design and built contractor.
The facility will be able to accommodate an inflow of 920,000 population equivalent (PE). The catchment area is 60.9 sq km stretching from Cheras to Kajang. Phasing out of 164 localised STP in various housing areas such as Cheras Batu 11, Desa Baiduri, Cheras Jaya, Kajang 1 and Kajang 3 including Kajang Prison. The construction will begin with laying approximately 105 km of sewage piping network. Through pipe-jacking method with pipe depth that varies from 25m deep underground, it will connect 1174 manholes that integrate 164 small inefficient multipoint sewage treatment plants that will be directly linked into one centralised location. This will immediately reduce multipoint of pollutant discharge into the Langat River.
Simultaneously, the Centralised Sewerage Treatment Plant is strategically constructed crossing the borders of Cheras and Kajang, occupying 7.3 hectares of land. This compact and integrated sewage plant offers more than efficient treatment system. It is designed to achieve the Class 1 Standard A water quality, specifically in ammonia removal. The plant also functions as an “integrated” space to promote best use of space and carbon reduction by means of Green Technology driven initiatives. The wastewater processing will be operated underground, utilising the "deep aeration" method with the Step-Feed Multi-Stage Denitrification Process that will reduce carbon and nitrogen emission effectively. The Langat Centralised Sewerage Treatment Plant project also provides its communities with range of public recreation and amenities such as community hall, landscaped park, and badminton and futsal courts built above the plant and is expected to complete and made available to public by year 2021.