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Device for deeply treating secondary effluent of urban sewage through partial reduction, coupling and ammonium oxidation of nitrate, and real-time control method

A technology for urban sewage and secondary effluent, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of insufficient utilization of organic carbon sources, low nitrite accumulation rate, Response is not easy to control and other problems, to achieve the effect of easy realization, low operating cost and convenient operation

Active Publication Date: 2019-06-14
BEIJING UNIV OF TECH
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  • Abstract
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  • Claims
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Problems solved by technology

However, when using actual urban sewage short-range denitrification to treat low-concentration nitrate wastewater, there are often shortcomings such as insufficient utilization of organic carbon sources, low nitrite accumulation rate, and difficult control of the reaction.

Method used

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  • Device for deeply treating secondary effluent of urban sewage through partial reduction, coupling and ammonium oxidation of nitrate, and real-time control method
  • Device for deeply treating secondary effluent of urban sewage through partial reduction, coupling and ammonium oxidation of nitrate, and real-time control method
  • Device for deeply treating secondary effluent of urban sewage through partial reduction, coupling and ammonium oxidation of nitrate, and real-time control method

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Embodiment Construction

[0027] Influent water is pumped in from the urban sewage storage tank (3), the secondary outlet water storage tank (2) of the sewage treatment plant, and the external carbon source water tank (5) through the first water inlet pump (2.1) and the second water inlet pump (3.1) Sequencing batch SBR reactor (1); during the water inflow process, the COD concentration sensor (1.7), nitrate concentration sensor (1.8) and ammonia nitrogen concentration sensor (1.9) collect the corresponding chemical signals online and input them to the multi-parameter online monitor (1.10), and then through the online parameter signal receiving port (6.4) input (6.1) online parameter controller and calculated by (6.7) computer, adjust the first water inlet pump (2.1) and the second water inlet pump (3.1) according to the calculation results And (5.1) the speed of the external carbon source water inlet pump; when the water level in the reactor reaches the preset water level, the float level gauge (1.2) s...

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Abstract

The invention provides a device for deeply treating secondary effluent of urban sewage through partial reduction, coupling and ammonium oxidation of nitrate, and a real-time control method, and belongs to the technical field of sewage biological treatment. The secondary effluent of the urban sewage is deeply treated through partial reduction, coupling and ammonium oxidation of the nitrate for which an organic carbon source in the urban sewage is utilized to provide an electron donor, and an automatic control system is arranged in a sequencing batch reactor (SBR) and comprises chemical oxygen demand, ammonia nitrogen and nitrate nitrogen online monitoring sensors; and NH4+-N, NO3--N and COD signals which are collected online are input into an online parameter control instrument, and by setting an automatic control program, an adjusting signal is output and acts on all executing unit controllers to adjust the mass and concentration ratios of COD / NO3--N and NH4+-N / NO3--N in the reactor intime. The denitrification efficiency in the anaerobic ammonium oxidation process of the urban sewage is improved, the organic carbon source in the urban sewage is sufficiently utilized, the operatingcost is lowered while the nitrite accumulation efficiency is improved, operation is easy, and the urban sewage can be stably and efficiently denitrified.

Description

technical field [0001] The invention relates to a device and a real-time control method for realizing the advanced treatment of secondary effluent of urban sewage by coupling ammonia oxidation with partial nitrate reduction, and belongs to the technical field of sewage biological treatment. It is suitable for the secondary effluent of urban sewage and sewage treatment plants containing nitrate, making full use of the organic carbon source in urban sewage to reduce nitrate to nitrite, providing substrate for subsequent anaerobic ammonium oxidation, and realizing the depth of urban sewage denitrification. Background technique [0002] Anaerobic ammonium oxidation technology means that anammox bacteria convert ammonia nitrogen and nitrite nitrogen in water into nitrogen and a small amount of nitrate nitrogen. This technology has the advantages of no need for aeration, no need for additional carbon sources, and small sludge production. , is one of the autotrophic biological den...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F101/16
CPCY02W10/10
Inventor 彭永臻范泽里杜睿王淑莹
Owner BEIJING UNIV OF TECH
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