A bed of MBBR media generally consists of thousands of tiny pieces that suspend themselves throughout a wastewater treatment tank, typically taking up about 50% to 70% of the available space. Their design makes them optimal for hosting beneficial bacteria and promoting their growth. Many types of MBBR media resemble wheel-shaped pasta, with the spokes of the wheel providing valuable surface area for bacterial growth. Others are thin, coin-shaped discs or squares. http://www.bioetp.net/

Dissolved Air Flotation system is an advanced wastewater treatment used mostly in the industrial sector in the country to treat wastewater algae, organics, oil and grease. It is very efficient for the reduction of Chemical Oxygen Demand (COD) present in fat, grease, oil, biological sludge, coloured organic matter, and colloidal material. It is also excellent for removing oil and grease from industrial wastewater, as mentioned. http://www.ysle-et.com/horizontal-daf/dissolved-air-flotation-systems.html