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Nitrous accumulation-free CANON system based on MBBR and operation method

A nitrogen accumulation and variable technology, applied in chemical instruments and methods, water/sludge/sewage treatment, biological water/sewage treatment, etc., can solve the problems of shortening start-up time, immaturity, etc., and achieve the goal of saving aeration costs Effect

Pending Publication Date: 2020-05-19
QINGDAO SPRING WATER TREATMENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the CANON start-up process, it is also clear that starting short-cut nitrification first can shorten the start-up time, but the relevant research on how to eliminate the accumulation of nitrous nitrogen through process optimization during the CANON start-up stage is still immature

Method used

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  • Nitrous accumulation-free CANON system based on MBBR and operation method
  • Nitrous accumulation-free CANON system based on MBBR and operation method

Examples

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Effect test

Embodiment 1

[0089] Embodiment 1 and Embodiment 2 are four groups of variable pools, embodiment 3 is two groups of variable pools, and embodiment 4 is three groups of variable pools.

[0090] Example 1:

[0091] A sewage treatment plant with a design water volume of 1000m 3 / d, influent COD, BOD 5 , NH 3 , TN, and design values ​​are 500, 260, 800, and 850 mg / L respectively, and are processed by the MBBR-based CANON system without nitrous accumulation. The volume ratio of the first aerobic pool and the variable pool is 1.0:1.0. The pool volume ratio of the variable pool and the first anoxic pool is 1.0:1.0, and the pool volume ratio between the first anoxic pool and the second aerobic pool is 1.0:1.0. In the start-up preparation stage, each system is added with a suspension carrier (filling rate of 50%), and each reaction tank is inoculated with ordinary activated sludge, and the sludge concentration in each reaction tank is 4.5g / L; An aerobic pool, the first to fourth variable pools, ...

Embodiment 2

[0093] The process parameters are set as follows:

[0094] An integrated equipment with a design water volume of 24m 3 / d, influent COD, BOD 5 , NH 3 , TN, and design values ​​are 250, 120, 650, and 750 mg / L respectively, and are treated by CANON system based on MBBR without nitrous accumulation. The volume ratio of the first aerobic pool and variable pool is 1.0:1.0, variable The pool volume ratio of the first anoxic pool to the first anoxic pool is 1.0:0.8, and the pool volume ratio of the first anoxic pool to the second aerobic pool is 1.0:1.2. In the preparatory stage for start-up, each system is fed with a suspension carrier (filling rate 55%) and each reaction tank is inoculated with ordinary activated sludge. Pool and the second aerobic pool are discharged through the main drainage pipe. Control the DO in the first aerobic pool at 2.5mg / L, and the aeration intensity is 3.5m 3 / (m 2 h), turn on the aeration device in the first variable pool, turn off the stirring d...

Embodiment 3

[0096] A high ammonia nitrogen sewage treatment project, the design water volume is 1000m 3 / d, influent COD, BOD 5 , NH 3 , TN, NO 2 - The design values ​​are 500, 240, 450, 500mg / L respectively, and the CANON system based on MBBR without nitrous accumulation is used for treatment. The pool volume ratio of the first anoxic pool is 1:1.0, the pool volume ratio of the first anoxic pool and the second aerobic pool is 1:1.0, and the variable pools are divided into two groups.

[0097] In the start-up preparation stage, each system is added with a suspension carrier (filling rate of 60%), and each reaction tank is inoculated with ordinary activated sludge until the sludge concentration in the reaction tank is 4.0g / L; in the short-cut nitrification start-up stage, the system feed water flows through the first The aerobic pool, the first to the second variable pool, the first anoxic pool, and the second aerobic pool are discharged through the main drainage pipe. Control the DO ...

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Abstract

The invention discloses a nitrous accumulation-free CANON system based on MBBR and an operation method, and relates to the technical field of biological denitrification of sewage. The device comprisesa reaction tank, a water inlet pipe, a water outlet pipe, a carbon source adding pipeline, an aeration device and a stirring device, wherein the reaction tank comprises a first aerobic tank, a variable tank, a first anoxic tank and a second aerobic tank. Sewage enters the system through the water inlet pipe and then flows through the first aerobic tank, the variable tank, the first anoxic tank and the second aerobic tank respectively and then is discharged through the water outlet pipe, so that the denitrification function is achieved by adjusting the operation mode of the variable tank in the system starting period, and the CANON function is achieved by adjusting the operation mode of the variable tank in the stable operation period. According to the invention, the change of the tank volume ratio of the CANON tank to the anoxic tank is realized by adjusting the operation mode of the variable tank in the starting period and the stable operation period, so that quick starting is realized, no nitrous is accumulated in the starting and operation processes, and water can stably reach the standard.

Description

technical field [0001] The invention relates to the technical field of biological denitrification of sewage, in particular to an MBBR-based CANON system without nitrous accumulation and an operation method. Background technique [0002] The autotrophic denitrification process (CANON) uses short-range nitrifying bacteria (AOB) and anaerobic ammonium oxidizing bacteria (AnAOB) to couple short-range nitrification and anammox oxidation, and denitrifies in the same reactor, which is different from traditional nitrification and denitrification. Compared with the process, it has the advantages of saving 60% of the aeration rate, no need to add organic carbon sources, reducing 90% of sludge production, and relatively less nitrogen oxide release. Moreover, this process has high denitrification load, low operating cost, and small footprint. It has been recognized as one of the most economical biological denitrification processes. The two functional microorganisms involved in the autot...

Claims

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Application Information

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IPC IPC(8): C02F3/30
CPCC02F3/302Y02W10/10
Inventor 张晶晶吴迪周宸宇井添祺韩文杰刘曙
Owner QINGDAO SPRING WATER TREATMENT
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