Device and method for rapidly realizing and stably maintaining shortcut nitrification in continuous flow process

A short-range nitrification and rapid technology, applied in the direction of chemical instruments and methods, sustainable biological treatment, water/sludge/sewage treatment, etc., can solve the problem of high energy consumption of aeration, achieve high denitrification rate, efficient destruction, indestructible effect
CN101759290AActive Publication Date: 2010-06-30彭永臻
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
彭永臻
Publication Date
2010-06-30

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Abstract

A device for realizing and maintaining shortcut nitrification in a continuous flow process is successively provided with a water inlet tank, an aeration system and a precipitation system, wherein the water inlet tank is communicated with a completely hybrid reaction tank through an intake pump and the completely hybrid reaction tank is communicated with a precipitation tank through a pipeline. The reaction tank is provided with a DO probe and a pH probe. Data is transmitted to a PLC control system through a DO\pH online detecting instrument and the PLC control system is connected with an air compressor. In an intermittent starting stage, the PLC control system can timely close a switch of the air compressor according to variation characteristics of DO and pH values. In a stable maintenance stage, the PLC control system can adjust an opening or a rotational speed of the air compressor in real time and control a DO concentration in the reaction tank within an optimized scope. This invention realizes rapid starting and stable maintenance of the shortcut nitrification and resolves a problem that starting of the shortcut nitrification in the continuous flow process is difficult in treating municipal sewage and the shortcut nitrification is difficult to be re-implemented. The invention is mainly used to realize the shortcut nitrification of the municipal sewage or wastewater containing high ammonia nitrogen in the continuous flow process, and saves the aeration energy consumption.
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Description

[0001] technical field

[0002] The invention relates to a method for biological denitrification of sewage by activated sludge method, in particular to a method for quickly starting and stably maintaining short-range nitrification in a continuous flow sewage treatment process by using process control. Background technique

[0003] my country's sewage treatment plants mostly use continuous flow process to treat urban sewage or organic industrial wastewater. The energy consumption of aeration in urban sewage plants accounts for about 50% of all operating costs of sewage plants. The operating costs of sewage treatment are huge and long-term.

[0004] The traditional nitrification and denitrification denitrification process is mainly divided into two steps, that is, converting ammonia nitrogen into nitrate nitrogen through nitrification, and then converting nitrate nitrogen into nitrogen gas through denitrification to escape from the water. In the nitrification stage, ammonia ni...

Claims

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