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Device and method for quick start and stable maintenance of short-cut nitrification of urban sewage based on triclosan

A technology for urban sewage and short-range nitrification, applied in biological treatment devices, chemical instruments and methods, biological water/sewage treatment, etc., can solve unresearched, short-range nitrification and other problems, achieve simple process, avoid sludge bulking, and facilitate The effect of the operation

Active Publication Date: 2021-11-26
BEIJING UNIV OF TECH
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  • Claims
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Problems solved by technology

(4) The optimum temperature of AOB and NOB is different. It is generally believed that when the system temperature is higher than 30°C, the growth rate of AOB is higher than that of NOB, which leads to the occurrence of short-range nitrification
The method of using triclosan to achieve short-range nitrification has not been reported yet, but it has been reported that triclosan above 1mg / L can inhibit the nitrification process. Specifically, how to use triclosan to achieve short-range nitrification and whether the achieved short-range nitrification is long-term stability has not been studied

Method used

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  • Device and method for quick start and stable maintenance of short-cut nitrification of urban sewage based on triclosan
  • Device and method for quick start and stable maintenance of short-cut nitrification of urban sewage based on triclosan
  • Device and method for quick start and stable maintenance of short-cut nitrification of urban sewage based on triclosan

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Embodiment Construction

[0031] Both the short-cut nitrification device and the triclosan sludge treatment device adopted in the method are SBR reactors, the material is plexiglass, the effective volume is 9L, and the drainage ratio of the short-cut nitrification reactor is 50%. An aeration device is installed at the bottom of the reactor, the air is compressed by the aeration pump, and the air is released by the microporous aeration head. The water is fed by the peristaltic pump, the water is discharged by the electric drain valve, and the sludge is returned by the return peristaltic pump, which is automatically controlled by the time-controlled timer.

[0032] The activated sludge inoculated in the reactor comes from the excess sludge in the secondary sedimentation tank of a municipal sewage treatment plant in Beijing. The retrieved excess sludge is inoculated into the reactor after repeated cleaning. After inoculation, the sludge concentration is 3000-3500mg / L. During the operation of the reactor...

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Abstract

The device and method for quickly starting and stably maintaining short-range nitrification of urban sewage based on triclosan belong to the field of sewage biological treatment. The device of the present invention is mainly composed of urban sewage raw water tank, urban sewage short-range nitrification device, intermediate water tank, triclosan sludge treatment device, triclosan agent box and sludge return device; the method is to use triclosan living sludge After pretreatment, the different recovery conditions of AOB and NOB can quickly start the short-cut nitrification of urban sewage at room temperature; then, some sludge is treated with triclosan inhibition through the triclosan sludge treatment device to improve the stability of short-cut nitrification and realize The stable accumulation of nitrite provides a substrate basis for the subsequent anammox denitrification of urban sewage at room temperature. At the same time, the method does not need to control harsh environmental conditions to start the short-cut nitrification process, which is easier to implement, and the short-cut nitrification can run continuously and stably.

Description

technical field [0001] The invention belongs to the field of biological treatment of sewage, and relates to a device and method for quickly starting and stably maintaining short-range nitrification of urban sewage at room temperature based on triclosan, and is especially suitable for biological denitrification treatment of urban sewage with a low carbon-to-nitrogen ratio. Background technique [0002] With the development of industrialization, the harm caused by human production activities to the water environment is becoming more and more serious. Among them, the discharge of nitrogen-containing wastewater and the eutrophication of water caused by it have also attracted people's continuous attention. Sewage treatment methods include physical, chemical and biological methods. For the denitrification process, biological denitrification is the most widely used, because the biological denitrification method is more economical, efficient, and has no secondary pollution under the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F3/34C02F101/16
CPCC02F3/1263C02F3/34C02F2101/16C02F2203/006C02F2209/08C02F2209/14C02F2209/15C02F2209/16C02F2209/22C02F2301/046Y02W10/10
Inventor 高景峰张达张文治贾京鑫王知其崔影超
Owner BEIJING UNIV OF TECH
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