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Process and device for strengthening short-cut denitrification anaerobic ammonia oxidation denitrification and synchronous phosphorus recovery

A nitrifying anaerobic ammonium and phosphorus recovery technology, applied in the field of water treatment, can solve the problems of inability to further participate in the reduction reaction, low ammonia nitrogen removal rate, and influence on the denitrification effect, and achieve long-term good operation, stable removal and recovery, and enhanced The effect of high exposure chance

Pending Publication Date: 2022-03-22
BEIJING UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although PD / A has been successfully applied to wastewater treatment, compared with nitrate, the low removal rate of ammonia nitrogen has always been an important reason hindering the removal of total nitrogen.
However, after iron alloy or iron powder is put into the reactor, it is easy to form an oxide film on the surface under the oxidation of oxides in the water phase, which makes it unable to further participate in the reduction reaction, resulting in the inactivation of iron , so that the denitrification effect after the long-term operation of the process is affected

Method used

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  • Process and device for strengthening short-cut denitrification anaerobic ammonia oxidation denitrification and synchronous phosphorus recovery
  • Process and device for strengthening short-cut denitrification anaerobic ammonia oxidation denitrification and synchronous phosphorus recovery
  • Process and device for strengthening short-cut denitrification anaerobic ammonia oxidation denitrification and synchronous phosphorus recovery

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Experimental program
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Effect test

Embodiment 1

[0034] This embodiment provides a device for strengthening short-range denitrification anammox denitrification and simultaneous phosphorus recovery, such as figure 1 As shown, the device adopts a sequence batch reactor, and the sequence batch reactor communicates with the raw water tank through a water inlet pipe, and an inlet pump is arranged on the water inlet pipe for pumping the sewage in the raw water tank into the reaction device. A first time controller is connected with the water inlet pump to control the working time of the water inlet pump.

[0035] The sequencing batch reactor is provided with an acetic acid dosing device, and the acetic acid dosing device includes an acetic acid storage container, and the acetic acid storage container adopts a polyethylene container, and the acetic acid storage container is connected to the sequence batch via an acetic acid dosing pipeline. The acetic acid dosing pump is connected to the acetic acid dosing pipeline, and a second t...

Embodiment 2

[0051] This embodiment provides a device for intensifying short-cut denitrification, anammox denitrification and simultaneous phosphorus recovery. The device is the same as that in embodiment 1. The sequence batch reaction process based on the device in this example is also the same as that in Example 1, except that the volume ratio of the amount of iron powder used in this example to the incoming water is 0.15 g / L in terms of mass.

experiment example

[0053] In order to prove the technical effect of the technical scheme in the present invention, NO 3 - -N, NO 2 - -N, NH 4 + -N and PO 4 3- The content of -P is detected and detected day by day. Wherein the next day monitoring result of the pollutant concentration in the water in and out of the reactor in embodiment 1 is as follows:

[0054] Table 1 In Example 1, the influent and effluent pollutant concentration of the device for strengthening short-range denitrification anammox denitrification and simultaneous phosphorus recovery

[0055]

[0056] Calculate the removal efficiency of pollutants according to the above experimental results, the results are shown in the following table:

[0057] Pollutant treatment rate of the device for strengthening short-range denitrification anammox denitrification and simultaneous phosphorus recovery in Example 1 in table 2

[0058]

[0059] From the above experimental results, it can be seen that the enhanced short-range deni...

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Abstract

The invention provides a process and a device for strengthening short-cut denitrification anaerobic ammonia oxidation denitrification and synchronous phosphorus recovery, according to the process, iron powder is added in a short-cut denitrification anaerobic ammonia oxidation reaction area, and acetic acid is adopted to replace a traditional carbon source sodium acetate. When the acetic acid is used as a carbon source substance, the effects of slowing down oxidation of iron powder and accelerating conversion of zero-valent iron to Fe < 2 + > can be achieved, removal of nitrogen is enhanced, meanwhile, effective combination of phosphorus and Fe < 2 + > is guaranteed, blue iron ore with economic value is generated and is adsorbed and recycled by a permanent magnet, and therefore synchronous removal of nitrogen and phosphorus and effective recycling of phosphorus can be achieved. According to the method, the coupling effect of the acetic acid carbon source and the zero-valent iron is utilized to solve the problems that the activity period of the zero-valent iron is short, the phosphorus removal efficiency of the short-cut denitrification anaerobic ammonia oxidation process is low and phosphorus cannot be effectively recycled, extra equipment does not need to be added, and good economic performance is achieved.

Description

technical field [0001] The invention belongs to the technical field of water treatment, and specifically relates to a process and a device for strengthening short-range denitrification, anammox denitrification and simultaneous phosphorus recovery. Background technique [0002] In most parts of China, the carbon source of low organic carbon sewage is usually limited and cannot meet the needs of denitrification, resulting in low denitrification efficiency of urban sewage. To solve this problem, anaerobic ammonium oxidation (anammox) is considered as a forward-looking denitrification technology to effectively reduce the use of carbon sources. Under anaerobic conditions, anammox bacteria utilize NO 2 - -N acts as an electron acceptor to convert NH 4 + -N converts to N 2 , without the need for additional carbon sources. In order to realize the anammox process, a more stable supply of NO for anammox bacteria (AAOB) 2 - -N short-path denitrification (PD) process has attract...

Claims

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Application Information

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IPC IPC(8): C02F3/28C02F3/34
CPCC02F3/286C02F3/282C02F3/2866C02F3/346C02F2203/006C02F2209/06C02F2209/14C02F2209/15C02F2209/16C02F2209/18C02F2209/44
Inventor 张莉豆全浩杨嘉春戚伟康郝仕伟蓝爽
Owner BEIJING UNIV OF TECH
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