Activated sludge aerated lagoons rotating biological contactors and trickling filters are the treatment systems most commonly used.
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However as shown in the figure below the river water quality has degraded in recent years.
Sewage systems for small communities.
In addition large urban areas utilize individual septic tanks ist.
Public sewage treatment plants in malaysia in malaysia extensive use has been made of primary treatment systems such as communal septic tanks and imhoff tanks and unreliable low cost secondary systems such as oxidation ponds.
Malaysia has constructed a vast number of wastewater treatment plants and enforced quality standards for river water and wastewater discharged from such facilities.
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Trends in river water quality in malaysia 4 sewerage finance in malaysia.
Weida s polypass systems are proprietary prefabricated modular sewage treatment plants suitable for decentralized treatment systems employing the extended aeration activated sludge treatment process.
Table 1 major biological sewage treatment processes systems used in malaysia.
Polypass systems are fast to install durable and reliable.
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