Denitrogenation method for nitrosation-anaerobic ammoxidation single stage organism

A technology of anaerobic ammonia oxidation and anaerobic ammonia oxidation bacteria, applied in chemical instruments and methods, sustainable biological treatment, biological water/sewage treatment, etc., can solve problems such as difficult process control, increase energy consumption, etc. The effect of simplified start-up operation, improved adaptability and stability, and reduced start-up time

Active Publication Date: 2007-10-17
BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
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AI Technical Summary

Problems solved by technology

Increased energy consumption, not easy to control the process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A single-stage nitrification-anammox symbiosis granulated sludge biological denitrification air-lift internal circulation reactor was used to carry out biological denitrification treatment experiments on sludge press filtrate. Specific operating parameters: The single-stage reactor has an effective volume of 16.0L, of which the reaction zone is 14L, the sedimentation zone is 2L, the sludge concentration in the reactor is 4.5g / L, the temperature is 20~26C, pH=7.5~8.2, and the average influent The flow rate is 35.44L / d, the average concentration of ammonia nitrogen in the influent of the sludge press filtrate is 352.67mg / L, the total nitrogen is 370.33mg / L, the volume load of ammonia nitrogen in the influent is 0.78kg / m3d, and the volume load of total nitrogen in the influent It is 0.82kg / m3d, and the average hydraulic retention time is 0.458d. The dissolved oxygen during the reaction operation is controlled below 0.5mg / L. Stable operation for 102 days, during the normal...

Embodiment 2

[0047] A two-stage nitrosation-anammox symbiosis granular sludge denitrification reactor was used to carry out a high-load biological denitrification experiment on sludge press filtrate. Specific operating parameters: the effective volume of the primary reactor is 16.0L, and the effective volume of the secondary reactor is 4.86L. The sludge concentration in the reactor is 4.3g / L, the temperature is 20~26°C, the average influent flow rate is 154.93L / d, and the hydraulic retention time is 0.104d. The average concentration of ammonia nitrogen in the sludge press liquid influent is 331.15mg / L, the average concentration of total nitrogen is 339.01mg / L, and the volume load of ammonia nitrogen in the influent is 3.2055kg / m 3 d, the total nitrogen volume load is 3.2811kg / m 3 d. Control the dissolved oxygen below 0.5mg / L, run stably for 48 days, the removal rate of total nitrogen in the effluent is 79.60%, the average concentration of ammonia nitrogen in the effluent is 23.22mg / L, the...

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PUM

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Abstract

The invention discloses a nitrosation-anaerobic ammonoxidation single-stage biological denitrification method, the technology utilizes nitrosation flora with intensified active carbon as core after adding powdery active carbon and anaerobic ammonoxidation flora to generate composite granule sludge, and couples two reactions of nitrosation reaction and anaerobic ammonoxidation reaction, realizes biological denitrification reaction for transforming ammonia nitrogen into nitrogen in macrography. The invention is operated in one reactor at normal temperature without need of heating preprocessing waste water, saves energy, needs small accommodation area and reduces free nitrous cumulant of free nitrite to resist ammonia nitrogen with higher concentration. The invention adds powdery active carbon to form intensified granule sludge and self-cultures suspended sludge, thereby simplifying startup and running of the technology.

Description

technical field [0001] The invention belongs to the field of waste water biological treatment, and relates to a method for treating middle and low concentration ammonia-containing waste water by using nitrosating bacteria group and anammox bacteria group granulated sludge. Background technique [0002] In the public specification of "Short-cut Nitrification-ANAMMOX Sequence Batch Type Biofilm Nitrogen Removal Operation Mode and Device" filed by Hunan University on August 29, 2006 with the application number 200610032147, a method of real-time control in the reaction vessel is disclosed. The temperature of the sewage and the restricted aeration method of high-frequency aeration-anoxic alternation realize the nitrosation anammox reaction. One cycle carries out four stages of water inflow, aeration, and anoxic. This process requires pretreatment of sewage. For treatment, the inlet water temperature needs to be heated to 26~33°C, the temperature in the reactor should be maintain...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/10C02F101/16
CPCY02W10/10
Inventor 杜兵刘寅孙艳玲曹建平何然
Owner BEIJING MUNICIPAL RES INST OF ENVIRONMENT PROTECTION
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