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Method for stably providing substrate for anaerobic ammonia oxidation by using bacteriostatic agent

A technology of anaerobic ammonium oxidation and antibacterial agent, which is applied in the field of urban sewage biological denitrification treatment, can solve the problems of short-range nitrification instability, difficult storage, high price, etc., and achieve the effect of simple process, easy operation and high safety

Pending Publication Date: 2022-05-13
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of 0.75mg / LFNA can also successfully start short-cut nitrification, but only lasted for 5 days. It was found that the abundance of Candidatus Nitrotoga in the reactor gradually increased, resulting in the instability of short-cut nitrification
Sulfide can easily cause the excessive growth of sulfur filamentous bacteria and lead to sludge bulking
In summary, these inhibitors have disadvantages such as not easy to store, NOB is easy to adapt and expensive.

Method used

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  • Method for stably providing substrate for anaerobic ammonia oxidation by using bacteriostatic agent
  • Method for stably providing substrate for anaerobic ammonia oxidation by using bacteriostatic agent

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Effect test

Embodiment 1

[0030] The seed mud of the embodiment of the present invention is the activated sludge of a certain urban sewage treatment plant in Beijing, and the influent adopts synthetic waste water, and the activated sludge inoculated is a full-scale nitrification sludge, and the full-scale nitrification process before p-chloro-m-cresol treatment is as follows: figure 1 As shown, the stable short-cut nitrification process after p-chloro-m-cresol treatment is as follows figure 2 shown.

[0031] The biochemical reactor has an effective volume of 1L, a drainage ratio of 50%, and a sludge concentration of about 3000mg / L. It operates 4 cycles a day, and each cycle is divided into water intake for 10 minutes, aeration for 180 minutes, sedimentation for 30 minutes, drainage for 10 minutes, and idle time for 130 minutes. five stages. Using synthetic wastewater as water distribution for biochemical reactors, NH in the influent 4 + - The concentration of N is about 70mg / L, the concentration of C...

Embodiment 2

[0035] The seed sludge of the embodiment of the present invention is activated sludge from a certain urban sewage treatment plant in Beijing, synthetic wastewater is used as influent, and the activated sludge inoculated is full-process nitrification sludge.

[0036] The biochemical reactor has an effective volume of 6L, a drainage ratio of 60%, and a sludge concentration of about 3000mg / L. It operates 4 cycles a day, and each cycle is divided into water intake for 10 minutes, aeration for 150 minutes, sedimentation for 30 minutes, drainage for 10 minutes, and idle time for 160 minutes. five stages. Using synthetic wastewater as water distribution for biochemical reactors, NH in the influent 4 + - The concentration of N is about 70mg / L, the concentration of COD is about 250mg / L, the reactor is aerated with the aeration pump, the DO concentration is maintained at 1.0-6.0mg / L, and the pH is maintained at 6.0-8.0.

[0037] First, the activated sludge is cleaned three times to el...

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Abstract

The invention discloses a method for stably providing a substrate for anaerobic ammonia oxidation by using a bacteriostatic agent, and belongs to the technical field of biological sewage treatment. The whole-process nitrification activated sludge is inoculated into a sequencing batch biochemical reactor, after aeration is finished, parachlorometacresol is used for soaking the activated sludge, the use concentration of the parachlorometacresol is 70-100 mg / L, and the soaking time is 24-36 h. After activated sludge is soaked and washed to eliminate interference, the reactor restores normal operation, and when the ammonia nitrogen degradation rate is greater than 80% and the nitrite accumulation rate is greater than 90%, short-cut nitrification is successfully started. According to the invention, the short-cut nitrification is realized by utilizing the bacteriostatic agent, and the bacteriostatic agent can continuously and stably provide a substrate for anaerobic ammonia oxidation by inhibiting nitrite oxidation, so that the development of an economic and energy-saving denitrification technology is promoted.

Description

technical field [0001] The invention belongs to the technical field of sewage biological treatment, and relates to a method for stably providing a substrate for anaerobic ammonium oxidation by using a bacteriostatic agent. The invention is suitable for biological denitrification treatment of urban sewage with low carbon-to-nitrogen ratio. Background technique [0002] With the rapid development of urbanization and industrialization, the environment in which human beings depend for survival is constantly changing, and social problems such as resources, environment, and population are becoming more and more acute. Environmental problems have become one of the important factors hindering the sustainable development of social economy. The water environment is an important part of the ecological environment. Excessive discharge of nutrients such as nitrogen and phosphorus leads to eutrophication of water bodies, which is one of the main environmental problems currently facing. B...

Claims

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Application Information

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IPC IPC(8): C02F3/00C02F3/12C02F3/30C02F11/00
CPCC02F3/006C02F3/307C02F3/303C02F3/1263C02F11/004Y02W10/10
Inventor 高景峰郭怡武泽杰李籽桥王知其崔影超
Owner BEIJING UNIV OF TECH
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