Sequencing batch bio-membrane reactor method capable of achieving partial nitrification

Abstract

The invention discloses a sequencing batch bio-membrane reactor device and a method capable of achieving partial nitrification. The device comprises a sequencing batch bio-membrane reactor, a raw water tank, an alkali adding tank, a pH sensor, a dissolved oxygen (DO) sensor and a programmable process controller. The method is characterized by adopting DO-mobile slope as an indication parameter of nitrification process completion in the nitrification process, timely stopping aeration and draining all the solution inside the sequencing batch bio-membrane reactor from a drain pipe at the bottom after aeration to prevent nitrite nitrogen-oxidizing bacteria on a bio-membrane from growing by utilizing residual nitrite nitrogen in the effluent in the previous cycle, thus achieving partial nitrification of the sequencing batch bio-membrane reactor. The device and the method take the DO-shifting slope as the indication parameter of the ammoxidation process of the sequencing batch bio-membrane reactor and have the advantages of short nitrification reaction time, stable partial nitrification effects, low aeration energy consumption, flexibility in operation management, low effluent turbidity, low sludge yield and the like.

Description

technical field [0001] The invention relates to a sequencing batch biofilm reactor device and method for realizing short-range nitrification, belongs to the technical field of sewage biological treatment, and is suitable for advanced treatment of urban sewage. Background technique [0002] With the improvement of people's living standards, the total amount of urban sewage discharge is gradually increasing; due to the increasingly prominent environmental problems such as "eutrophication" of water bodies, the contradiction between the growing environmental protection requirements and the current environmental pollution status The treatment and discharge standards formulated for sewage are also gradually increasing; both of these aspects require sewage treatment plants to increase treatment capacity and improve treatment effects; [0003] Upgrading and upgrading of sewage treatment plants is one of the most urgent problems facing sewage treatment plants; therefore, research and...

AI Technical Summary

Problems solved by technology

However, the longer sludge age of the sequencing batch biofilm method limits the application of short-cut nitrification technology.

[0007] At home and abroad, there are few studies on how to apply short-range nitrification technology to the sequencing batch biofilm method. Most of them use high ammonia nitrogen load and high free ammonia concentration (FA) to achieve short-range nitrification, which is not suitable for urban sewage treatment.

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