Real-time control apparatus for floated aerobic biofilm A<2>O system for treating low C/N sewage, and method thereof

Abstract

The present invention discloses a real-time control apparatus for a floated aerobic biofilm A<2>O system for treating low C / N sewage, and a method thereof. The real-time control apparatus for the floated aerobic biofilm A<2>O system comprises a raw water tank (1), an aerobic biofilm A<2>O reactor (2), a secondary settling tank (3), a DO meter (5), a on-line tester (6), a computer (7) and a process controller (8). The real-time control method comprises: online collecting ammonia nitrogen concentration in a effluent tank, wherein the real-time control system is adopted to adjust the aeration rate of an air pump; online collecting nitrate nitrogen concentration in the effluent tank, wherein the real-time control system is adopted to adjust the reflux ratio of the nitrified liquid of a peristaltic pump; online collecting the PO4<3->-P concentration in the effluent tank, wherein the real-time control system is adopted to adjust a bypass flow ratio of the peristaltic pump; online collecting the TOC concentration in the effluent tank, wherein the real-time control system is adopted to adjust the aeration rate of the air pump. The method provided by the present invention is one of the most effective methods for treating the low C / N sewage and synchronously denitriding and removing phosphorus. The effluent quality through the apparatus and the method provided by the present invention stably achieve the national one-level (A) standard.

Description

technical field [0001] The invention belongs to the field of sewage treatment and specifically designs an aerobic biofilm A for treating low C / N sewage 2 O technology real-time control device and method. Background technique [0002] Excessive discharge of nutrients such as nitrogen and phosphorus is an important cause of "eutrophication" of water bodies, which poses a serious threat to industrial and agricultural production and people's lives. A 2 As the simplest simultaneous denitrification and phosphorus removal process, O has a series of advantages such as simple structure, short HRT, mature design and operation experience, small control complexity and not easy to produce sludge bulking. It is the main process of urban sewage plants in my country. However, A 2 The contradiction between nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bacteria in organic load, sludge age and carbon source demand makes it difficult to obtain good nitrogen and phosp...

AI Technical Summary

Problems solved by technology

Microorganisms with different environmental requirements live together, and there is no guarantee that they can grow in their own optimum environment, which will definitely affect the treatment effect

The most obvious is that the different requirements of phosphorus accumulating bacteria and nitrifying bacteria on sludge age lead to the contradiction between denitrification and phosphorus removal, which often becomes the main reason for the unstable efficiency and low compliance rate of simultaneous denitrification and phosphorus removal in a single sludge system

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