Trickling filter design guideline - How do trickling filters work?

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Trickling filter design guideline - How do trickling filters work?

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 fill media but in the past rock, gravel and hardwood was also used...

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