An integrated process of (a/o/a)-mbr for enhanced denitrification and phosphorus removal by zone control and sub-point water inflow and its system device

A technology of zonal control and point-to-point water inflow, applied in water/sludge/sewage treatment, biological water/sewage treatment, aerobic and anaerobic process treatment, etc., to achieve high-efficiency nitrogen and phosphorus removal, simple process, biological high concentration effect

Active Publication Date: 2022-07-19
管大祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to improve the traditional nitrogen and phosphorus removal process from the perspective of solving the problem of low carbon sources and realizing efficient nitrogen and phosphorus removal, and to provide a process for intensified nitrogen and phosphorus removal for domestic sewage with low C / N ratio. This process is a new process to improve the efficiency of simultaneous denitrification and phosphorus removal, which can realize stable and efficient nitrogen and phosphorus removal

Method used

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  • An integrated process of (a/o/a)-mbr for enhanced denitrification and phosphorus removal by zone control and sub-point water inflow and its system device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] (1) The experiment was carried out with low C / N domestic sewage from the urban domestic sewage treatment plant. The influent index was CODcr: 350 mg / L, NH 3 -N: 35 mg / L, TN: 50 mg / L, TP: 5 mg / L.

[0050] (2) Part of the domestic sewage is lifted into the anaerobic tank for reaction, the influent ratio of the anaerobic tank and the denitrification tank is 1:4, the residence time of the anaerobic tank is 1h, and then it enters the aerobic tank for reaction and simultaneously Blast aeration, the residence time is 2.5h, the effluent enters the sedimentation tank to remove the sludge by sedimentation.

[0051] (3) The effluent from the sedimentation tank enters the denitrification tank for reaction, the residence time of the denitrification tank is 1.5h, and then it enters the MBR reaction tank for reaction, and at the same time, blast aeration is carried out, the residence time is 4h, and finally it is discharged by suction pump.

Embodiment 2

[0053] In step (2), the water inflow ratio of the anaerobic tank and the denitrification tank is 1:2, and other operation processes are the same as those in Example 1.

Embodiment 3

[0055] In step (2), the water inflow ratio of the anaerobic tank and the denitrification tank is 1:1, and other operation processes are the same as those in Example 1.

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Abstract

The invention discloses an integrated process and a system for enhancing nitrogen and phosphorus removal (A / O / A)-MBR by zoning control and sub-point water inflow. The C / N ratio of domestic sewage is chronologically followed by anaerobic phosphorus release treatment, aerobic phosphorus absorption and nitrification treatment, precipitation effluent, denitrification and denitrification treatment and MBR nitrification and decarbonization treatment. The invention realizes the spatial separation of phosphorus removal bacteria and nitrifying bacteria by controlling the phosphorus removal and nitrogen removal processes by zone, ensures a good growth environment for microorganisms in their respective systems, and solves the contradiction of mud age and nitrate existing in the traditional process. At the same time, the energy consumption problem of sewage treatment operation such as adding carbon source is solved by the method of water inflow at different points, so as to achieve the purpose of high-efficiency nitrogen and phosphorus removal. At the same time, it has the advantages of good water quality, simple process, small footprint and convenient operation.

Description

technical field [0001] The invention relates to the technical field of sewage biological treatment, in particular to a process and a system device for intensifying nitrogen and phosphorus removal for domestic sewage with a low C / N ratio. [0002] technical background [0003] The content of organic matter in sewage is a key factor affecting the anaerobic phosphorus release and denitrification and denitrification effects in the denitrification and phosphorus removal process. However, according to survey statistics, more than 65% of sewage treatment plants have insufficient carbon sources, which leads to the inability to remove nitrogen and phosphorus elements in sewage. In addition, because biological denitrification and phosphorus removal are performed by two completely different types of bacteria, the biochemical processes are also completely different, and they have different requirements for environmental factors. Traditional processes generally have problems such as mud a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30C02F3/12C02F3/34C02F101/16C02F101/10C02F101/30
CPCC02F3/308C02F3/302C02F3/1268C02F3/34C02F2001/007C02F2101/16C02F2101/30Y02W10/10
Inventor 管大祥吴晓东刘琳
Owner 管大祥
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