Technologies :

Activated Sludge Process (ASP)

The objective of the activated sludge process is to remove soluble and insoluble organic compounds from the wastewater stream in order to convert this material into a flocculent microbial suspension that will settle using gravitational solid-liquid separation techniques. The activated sludge process is a biological wastewater treatment process that uses microorganisms, including bacteria, fungi, and protozoa, to speed up decomposition of organic matter. Activated sludge is an aerobic process requiring oxygen for treatment. As the microorganisms grow and reproduce, waste materials are removed.

Advantages : Efficient removal of BOD, COD and nutrients when designed and professionally operated according to local requirements. The process itself has flexibility and numerous modifications can be tailored to meet specific requirements (e.g. for nitrogen removal). Activated sludge is the best documented and most widely used form of secondary wastewater treatment.