Denitrified deep bed biological filter tank

Abstract

The invention relates to a denitrified deep bed biological filter tank, which comprises a tank body of a flocculation sedimentation tank which is divided into four groups of sedimentation tanks. The invention is characterized in that tank walls are additionally installed at the central position of the front part of each group of the sedimentation tank to form eight groups of filter tanks, a collecting tank is provided at the bottom of the filter tank, a cover plate is provided on the collecting tank, an interval part capable of penetrating water is provided between the cover plate and the collecting tank, an aeration head and an aeration pipe are uniformly distributed on the cover plate, a gas and water distribution block is additionally installed on the aeration pipe, a distribution tank is additionally installed at the upper part of each group of the filter tank. The invention has the advantages that the land occupation is less, the filter tank can be taken as the deep bed filter tank or the denitrified deep bed biological filter tank for removing SS, TN and TP. According to the invention, the gas and water distribution is employed; the water distribution and the gas distribution are uniform, maintenance-free for lifetime in the filter tank is provided. The water volume for backwashing is little with 4% and no exceeding of 2% generally. The filling material uses quartz sand which possesses hard quality, no loss or damage can be generated, no replacement is required. The standard of urban reclaimed water can be reached, and the water from the filter tank of the invention can be reused as wash water for plant area greening and road flushing.

Description

technical field

[0001] The invention belongs to a sewage filter, in particular to a denitrification deep-bed biological filter adopting an anoxic biofilm process. Background technique

[0002] At present, the main function of the flocculation and sedimentation tank in the sewage plant is to remove the total phosphorus in the water body. The principle is to add polyaluminum chloride to the water body by chemical method to precipitate the phosphorus in the water body, and then scrape it into the mud bucket by the mud scraper in the pool Drain into the mud storage tank. The overall length of the pool is 55.9 meters, the pool width is 34.25 meters, the pool depth is 4.47 meters, and the effective water depth is 3.97 meters. The pool is divided into 4 groups of sedimentation tanks, each group of sedimentation tanks is 45.35 meters long and 8.4 meters wide, and each group of equipment is equipped with a chain type mud scraper, matching mud bucket and suction pump. The first half...

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