Synchronous short-cut nitrification-denitrification water treatment apparatus and synchronous short-cut nitrification-denitrification water treatment process

Abstract

The invention discloses a synchronous short-cut nitrification-denitrification water treatment apparatus and a synchronous short-cut nitrification-denitrification water treatment process. The apparatuscomprises a water treatment bin cylinder and a central control system, wherein the water treatment bin cylinder comprises an inner ring layer and an outer ring layer, the inner ring layer is providedwith an internal aeration device and a three-phase separation zone, the outlet of the three-phase separation zone is connected to a reflux pipe, the reflux pipe extends into the outer ring layer, andthe inner ring layer is provided with a first through-wall pump. According to the process, sewage and active sludge are subjected to a nitrification reaction in the first aerobic zone of the inner ring layer; the mixture after the reaction enters the three-phase separation zone, wherein gas and part of the mud-water mixed liquid enter the outer ring layer through the reflux pipe, the remaining mud-water mixed liquid overflows upward, and the water is discharged after precipitation; and the mud-water mixed liquid refluxed to the outer ring layer is subjected to denitrification in the outer ring layer, and the obtained liquid enters the inner ring layer through the first through-wall pump, and is subjected to nitrification. According to the present invention, with the apparatus and the process, sewage can be subjected to synchronous short-cut nitrification and short-cut denitrification in the water treatment bin cylinder, such that the sewage nitrogen removal effect is good, the efficiency is high, and the oxygen consumption and the active sludge consumption required in the process are reduced.

Description

technical field [0001] The invention relates to a water treatment device in the technical field of sewage treatment, in particular to a synchronous short-range nitrification and denitrification water treatment device and a synchronous short-range nitrification and denitrification water treatment process. Background technique [0002] In the treatment of water environment, the use of activated sludge method to treat organic matter in water is the safest and safest treatment method. In the process of activated sludge treatment, in order to remove nitrogen in water, it is usually realized through nitrification and denitrification reactions. The traditional way of nitrification and denitrification is to return to the anoxic zone for denitrification after first-stage aeration and nitrification. During the material conversion process, a certain amount of consumption is formed, which makes the nitrogen removal effect of nitrification and denitrification poor. [0003] In the prior...

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Problems solved by technology

However, the denitrification efficiency of traditional sewage treatment is low, and the activated sludge process is generally a whole process of nitrification-denitrification. Compared with short-range nitrification and denitrification, the reaction process is longer, and more carbon sources and oxygen are required, and the amount of sludge is large and the cost is high.

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