Anaerobic filter

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In sewage treatment systems, an anaerobic filter (AF) is a form of anaerobic digester. The digestion tank contains a filter medium where anaerobic microbial populations — organisms that live in the absence of oxygen — can establish themselves. Such filters are commonly employed in the treatment of waste water. These reactors are gaining in popularity versus more established aerobic waste-water treatment systems because they produce a less solid residue[1] than do other types of filter.

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  1. ^ AF Reactor Paper Francisco, O., Garrido, J. M., Arrojo, B. & Mendez, R. (2003) Anaerobic filter reactor performance for the treatment of complex diary waste water at industrial scale, Water Research 37, 4099-4108[dead link]