Filter Cell

Biological Aerated Filter

The Biological Aerated Filter (BAF) is an aerobic or anoxic biological reactor using granular filter media for fixed biofilm. It integrates biological contact oxidation and suspended solids filtration into a single unit, effectively removing SS, CODcr, BOD₅, NH₃-N, TN, TP, AOX (hazardous substances), as well as hardness, turbidity, and color from water. It is suitable for municipal wastewater, industrial wastewater, advanced treatment for water reuse, and pretreatment of polluted raw water sources. Due to its numerous advantages unmatched by other processes, BAF has been widely adopted both domestically and internationally in recent years.

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Denitrification Deep Bed Filters

The denitrification deep‑bed filter is an advanced treatment unit that combines biological denitrification and filtration in a single process. It utilizes specially graded, high‑strength ceramsite (expanded clay) or quartz sand as the biofilm carrier for denitrifying bacteria. When external carbon source is added, the filter operates as a denitrification deep‑bed filter capable of removing TN, SS and TP. When carbon source addition is discontinued, it functions as a conventional deep‑bed filter, effectively removing SS and TP.

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