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Improved UCT technology and device

A technology of a process device and a stirring device, applied in the field of sewage treatment, can solve the problems of increased water treatment cost, low reaction speed, etc., and achieve the effects of preventing further harm, high nitrous acid accumulation rate, and reducing consumption.

Active Publication Date: 2007-01-31
BEIJING UNIV OF TECH
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Problems solved by technology

Oxygen consumption in the whole process of nitrification causes a significant increase in the cost of water treatment
[0006] Second, the reaction rate is not high

Method used

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  • Improved UCT technology and device

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Embodiment Construction

[0036] The improved UCT process operation steps refer to the appendix figure 1 . This process method is based on the sequence of phosphorus removal and nitrification reactions in the traditional UCT nitrogen and phosphorus removal system, and controls the nitrosation and nitrification that occur sequentially in the aerobic nitrification process in two reactors, forming a two-stage process. Aerobic nitrification process. In order to prevent the influence of dissolved oxygen on anoxic phosphorus uptake, a deoxygenation reactor is set up after the first aerobic reactor, and the dissolved oxygen in the reflux liquid is reduced to a minimum. At the same time, the reflux of the aerobic nitrification liquid originates from the deoxygenation reactor. The device adopted in the technical solution of the invention is a denitrification phosphorus removal process device capable of simultaneously realizing short-range nitrification and using nitrite as an electron acceptor.

[0037] The ...

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Abstract

3 The present invention relates to an improved UCT process and its equipment, belonging to the field of sewage treatment technology. It is characterized by that the aerobic reactor is divided into two stages, between two aerobic reactors a deoxygenation reactor is set, every aerobic reactor is equipped with an independent gas flow controller. In first aerobic tank it can control low dissolved oxygen to implement short-range nitrification and make the ammoniac nitrogen be oxidated into nitrite, in second aerobic tank it applies high dissolved oxygen to ensure that the residual nitrite can be oxidated into nitrate. Said equipment also includes a second anaerobic reactor. Said invention also provides the concrete function and action of said deoxygenation reactor and said second anaerobic reactor.

Description

technical field [0001] The invention relates to a sewage biological treatment process method and device, which can simultaneously realize short-range nitrification and denitrification phosphorus removal using nitrite as an electron acceptor, and belongs to the field of sewage treatment. Background technique [0002] The University of Cape Town (UCT) process in South Africa, referred to as the UCT process, is one of the earliest processes used for simultaneous biological nitrogen and phosphorus removal, and is currently the most widely used process in various countries. [0003] The UCT process has anaerobic zone, anoxic zone, aerobic zone and sedimentation zone in sequence, and activated sludge exists in each zone. The process is equipped with three return pipelines, namely: return of mud-water mixture from anoxic zone to anaerobic zone, return of mud-water mixture from aerobic zone to anoxic zone, and sludge return from sedimentation zone to anoxic zone . Sewage first ent...

Claims

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Application Information

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IPC IPC(8): C02F3/30
Inventor 王淑莹崔有为彭永臻
Owner BEIJING UNIV OF TECH
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