Propulsion type reaction device and culture method for culturing of aerobic granular sludge

Abstract

The invention belongs to the technical field of sewage aerobic biochemical treatment, and specifically relates to a propulsion type reaction device and a culture method for culturing of aerobic granular sludge. According to a main technical scheme of the invention, the interior of a reaction vessel is successively composed of a sedimentation area, a gradual aeration area and an aerobic granular sludge separation area according to the propulsion direction of a reaction, wherein the bottom part of the sedimentation area is provided with a water distribution system used for continuous propulsion;a partition baffle plate is arranged between the gradual aeration area and the sedimentation area; sludge clumps formed in the sedimentation area are across the partition baffle plate with water flow; the bottom part of the gradual aeration area is provided with a gradual aeration system; aeration heads of the gradual aeration system are uniformly arranged at the bottom part of the gradual aeration area and are step-by-step increased in aeration intensity along the propulsion direction of the reaction; the aerobic granular sludge separation area is provided with a cone bucket; the upper partof the cone bucket is connected with a secondary sedimentation tank; and the lower part of the cone bucket communicates with a water inlet pipeline of the water distribution system. The propulsion type reaction device for culturing of the aerobic granular sludge provided by the invention has the characteristics of applicability to various complex water qualities and good culture effect with continuous flow.

Description

technical field [0001] The invention belongs to the technical field of aerobic biochemical treatment of sewage, and in particular relates to a propulsion reaction device for cultivating aerobic granular sludge and a cultivating method thereof. Background technique [0002] Aerobic biochemistry is a widely used sewage biochemical treatment technology at present, and activated sludge is the main body of aerobic biochemistry. However, the aerobic biochemical system using the activated sludge method has the disadvantages of low operating volume load and cannot simultaneously remove nitrogen and phosphorus, while the biofilm aerobic biochemical system has periodic film formation and shedding of fillers, which affects the smooth operation of the system. Requires packing replacement and aeration system repair. [0003] Aerobic granular sludge technology (Aerobic Granular Sludge, AGS) is a new type of microbial self-immobilization technology developed in recent decades. It is a gra...

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Problems solved by technology

[0008] Although the technical solutions of the above-mentioned patents have all realized the granulation of aerobic sludge, there are the following problems: First, the wastewater for cultivating aerobic granular sludge is prepared by laboratory sewage, and various types of nutrient salts need to be added, which increases the The operating cost of the system, the difference between the prepared sewage and the actual treated wastewater is very large, so it is difficult to adapt to changes in water quality conditions; second, the equipment used in the cultivation method is a sequencing batch or batch reactor, which cannot be widely used Oxygen aeration tank or oxidation ditch and other full-mixed flow or plug-flow continuous reactors; third, special operating units need to be set up in the system or the reactor itself has a complex structure and high cost, resulting in unstable production and operation, and some Can only operate under experimental conditions, it is difficult to extend to industrial applications

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