Upward flow type biological aerated filter

Abstract

The invention relates to an upward flow type biological aerated filter. The biological aerated filter comprises a plurality of filter chambers which are connected in series sequentially, wherein a water inlet region is arranged in each filter chamber, sewage enters the water inlet region of the bottom of the first filter chamber by virtue of a pipeline, and each water inlet region is connected with a dredge pipe; a filter region is arranged in each filter chamber above the water inlet region, a ceramisite filter material covers each filter region, a supporting separator is arranged under each filter region, a filter head is fixedly arranged on each separator, and an aerator pipe is arranged under the filter material; except the first filter chamber, an overflow weir is arranged on the top of one side, close to the previous filter chamber, of an arbitrary filter chamber, and the water inlet region of an arbitrary filter chamber is connected with the overflow weir of the filter chamber by virtue of a water delivery pipe, so that the heights of the overflow weirs in the plurality of filter chambers are gradually reduced from the side of the water inlet end to the side of the water outlet end. The upward flow type biological aerated filter is easy to maintain, cannot be blocked easily, and can be used for effectively improving the sewage washing effect.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to an upward flow type aerated biological filter. Background technique [0002] Biological Aerated Filter (BAF) is a new type of water treatment process that has been researched and promoted abroad since the 1980s and has basically matured in the early 1990s. Its basic principle is based on the primary treatment, with the granular filter material and the biofilm attached to it as the treatment medium, to give full play to the biological metabolism, physical filtration, physical adsorption of the membrane and the membrane and the filter material, and the reactor. The multi-stage predation of internal food can realize the removal of pollutants in the same unit reactor. There are different aerobic and anoxic areas in the reactor, which can simultaneously realize nitrification and denitrification, and achieve the purpose of denitrification while removing organic ma...

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Problems solved by technology

[0004] However, when the biological aerated filter in the prior art is in operation, due to head loss, the flow velocity of the influent water in the filter area slows down, which may easily cause sludge in the influent area to block the filter material and filter head, thus affecting the biofilm to the wastewater. Degradation increases filter cost

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