Real-time control device and method for deep denitrification and dephosphorization of A2/O-BAF (Biological Aerated Filter) process

Abstract

The invention discloses real-time control device and method for the deep denitrification and dephosphorization of an A2 / O-BAF (Biological Aerated Filter) process. The A2 / O-BAF real-time control device mainly comprises a raw water tank (1), an A2 / O reactor (2), a secondary sedimentation tank (3), a BAF reactor (4) and a real-time control system (5). The real-time control method comprises the following steps of: collecting the concentrations of ammonia and nitrogen in a water outlet tank on line and obtaining a real-time control variable through the operation of a computer; adjusting the aeration amount of an air pump through a stroke controller; collecting the concentration of nitrate nitrogen in the water outlet tank on line and obtaining a real-time control variable through the operationof the computer; adjusting the reflux ratio of a peristaltic pump through the stroke controller; collecting the concentration of TP in the water outlet tank on line and obtaining a real-time control variable through the operation of the computer; and adjusting the reflux ratio of the peristaltic pump through the stroke controller. The invention overcomes the limitations of a traditional biological phosphorus and nitrogen removal process of sewage and is one of the most effective methods for the synchronous phosphorus and nitrogen removal of C / N sewage.

Description

Real-time control device and method for deep nitrogen and phosphorus removal in A2 / O-BAF process technical field The invention discloses a real-time control device and method for deep denitrification and dephosphorization of A2 / O-BAF process, which belongs to the sewage biological treatment system of activated sludge method. Background technique 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. As the simplest simultaneous denitrification and phosphorus removal process, A2 / O has a series of advantages such as simple structure, short HRT, mature design and operation experience, low control complexity, and not easy to produce sludge bulking. It is the main process of urban sewage plants in my country. However, due to the conflicts between nitrifying bacteria, denitrifying bacteria and phosphorus accumulating bact...

AI Technical Summary

Problems solved by technology

However, BAF has a short working cycle, high frequency of backwashing, and prone to clogging

In addition, my country's urban sewage naturally has low C / N. How to improve the treatment effect of low C / N water quality is a major and thorny problem facing water treatment workers.

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