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A high-efficiency autotrophic denitrification system based on mbbr and its quick start-up method

An autotrophic denitrification and high-efficiency technology, applied in the field of biological denitrification, can solve the problems of low total nitrogen load, load fluctuation, limitation, etc., and achieve the effect of simple control, small land occupation and short start-up time

Active Publication Date: 2021-08-17
QINGDAO SPRING WATER TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing research focuses on CANON, and the overall total nitrogen load is not high. According to reports, nitrous nitrogen limits the removal of total nitrogen during stable operation, making the load fluctuate greatly and making it difficult to stabilize for a long time.

Method used

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  • A high-efficiency autotrophic denitrification system based on mbbr and its quick start-up method
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Examples

Experimental program
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Effect test

Embodiment 1

[0099] The landfill leachate in a certain area is produced after anaerobic digestion as the system influent, the pH is 7.8-8.0, the water temperature is 28-32°C, the average COD value of the influent water is 1333mg / L, the average value of ammonia nitrogen is 726mg / L, and the BOD 5 The average value is 916mg / L, the average value of C / N ratio is 1.26, and the effective volume ratio of R2 and R1 is 5.5. The wastewater is firstly pretreated to reduce SS to below 100mg / L, with an average value of 52mg / L before entering the system.

[0100] In preparation for start-up, each reactor is fed with a suspension carrier, the filling rate of R1 is 40%, the filling rate of R2 is 35%, and the effective specific surface area of ​​the suspension carrier is 800m 2 / m 3 , porosity 90%, inoculate aerobic sludge, control R1 and R2 sludge concentration 4.5g / L;

[0101] Start nitrosation and decarbonization, control the DO of R1 to 1.2-1.5mg / L, and the aeration intensity to 3.5-4.0m 3 / m 2 / h, ...

Embodiment 2

[0107] Taking the anaerobic digestion sludge dehydration liquid of a city sewage treatment plant as the research object, the pH is between 7.6 and 8.0, the average COD value of influent water is 914mg / L, the average value of ammonia nitrogen is 432mg / L, and the BOD 5 The average value is 728mg / L, and the average value of C / N ratio is 1.68. The effective volume ratio of R2 and R1 is 5.17. The waste water is first pretreated to remove SS, controlled below 100mg / L, with an average value of 82mg / L, and then enters the system.

[0108] In preparation for start-up, each reactor is fed with a suspension carrier, the filling rate of R1 is 45%, the filling rate of R2 is 30%, and the effective specific surface area of ​​the suspension carrier is 800m 2 / m 3 , porosity 90%, inoculated with aerobic sludge, control R1 and R2 sludge concentration 4.0g / L;

[0109] Start nitrosation and decarbonization, control the DO of R1 to 1.2-1.4mg / L, and the aeration intensity to 3.0-4.0m 3 / m 2 / h...

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Abstract

The invention discloses an MBBR-based high-efficiency autotrophic denitrification system and a rapid start-up method, which belong to the technical field of biological denitrification. The present invention adopts the CANON process based on MBBR and sets up an aerobic tank in front of the main CANON reactor. On the one hand, the organic matter is removed by aeration to eliminate the inhibition of the AnAOB by the organic matter, and on the other hand, a part of nitrous is additionally generated, which is used for the subsequent CANON process. The substrate is provided, which promotes the increase of the total nitrogen load, and solves the technical problems such as large inoculation amount, low load, and unstable operation in the later stage in the prior art. Suspended carrier is added to each reactor, the operation control is simple, and during the stable operation period, the total ammonia nitrogen concentration of the system drainage is stable below 50mg / L. The invention operates the CANON process and has the advantages of low inoculum amount, fast start-up time, high total nitrogen load in operation, stable operation, and low concentration of ammonia nitrogen in total effluent.

Description

technical field [0001] The invention belongs to the technical field of biological denitrification, and in particular relates to an MBBR-based high-efficiency autotrophic denitrification system and a quick start method. Background technique [0002] Anaerobic ammonium oxidation (Anammox) refers to the process in which anammox bacteria (AnAOB) convert nitrous into nitrogen gas using ammonia nitrogen as an electron donor. Compared with the traditional biological denitrification process, this process has the advantages of low sludge output, 100% carbon source saving, 57% aeration saving, high denitrification efficiency, and less land occupation. It is mainly used for the treatment of high ammonia nitrogen wastewater, such as anaerobic sludge digestion solution, landfill leachate, etc. Completely Autotrophic Nitrogen Removal Over Nitrite (CANON) is a combination of short-cut nitrification and anammox oxidation in one reactor, which has the advantages of less land occupation and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/12C02F3/30C02F101/16
CPCC02F3/121C02F3/1268C02F3/302C02F3/307C02F2101/16C02F2209/22Y02W10/10
Inventor 周家中吴迪韩文杰管勇杰
Owner QINGDAO SPRING WATER TREATMENT