Film fill plastic media and attached biofilm growth I Wastewater treatment

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Biological processes in wastewater treatment can be classified into two main categories: suspended growth and attached growth/ biofilm processes. In suspended growth processes the microorganisms responsible for wastewater treatment are maintained in liquid suspension by appropriate mixing and aeration. The most common suspended growth process is activated sludge. Instead in the attached growth process, the […]

Trickling filter design guideline – How do trickling filters work?

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Trickling filters are biological reactors within wastewater treatment plants which are used to remove organic matter and/or ammonia from wastewater. Compared to the activated sludge process the microorganisms are not suspended in the mixed liquor but they are attached to a fixed bed surface. Nowadays, the fixed bed surface is usually provided by structured plastic […]

Trickling filter process – Advantages in comparison to activated sludge

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Trickling filters, also known as bio filters, are normally a fixed-bed, biological reactor operating in aerobic conditions. In the filter, microorganisms are attached to the inter packing material which was composed of rocks or gravel in the past and is nowadays a wide range of plastic fill media. Fill media support is placed on the […]