A bio-oxidation harmless treatment process for arsenic-containing hazardous waste

A harmless treatment and biological oxidation technology, applied in the field of environmental pollution control, can solve the problems of large area occupied by the aeration tank, large power consumption for stirring, low arsenic removal rate, etc., and achieve the effect of easily intercepting wind power

Active Publication Date: 2021-04-16
许立中
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these arsenic-containing hazardous waste treatment methods do not have a high arsenic removal rate, so a method of biological oxidation treatment of arsenic-containing hazardous waste has emerged, but this method requires the use of a large number of aeration tanks, and the traditional aeration tank occupies a large area , and because of the need for stirring, the power consumption is also very large, the burden on the enterprise is heavy and a large amount of electricity is used, so more coal needs to be burned for power generation, which has certain disadvantages, so clean energy and special aeration are required Pool structure to reduce the loss of electric energy

Method used

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  • A bio-oxidation harmless treatment process for arsenic-containing hazardous waste
  • A bio-oxidation harmless treatment process for arsenic-containing hazardous waste
  • A bio-oxidation harmless treatment process for arsenic-containing hazardous waste

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Embodiment 1

[0061] Embodiment 1. This embodiment provides a process for the harmless treatment of arsenic-containing hazardous waste by biological oxidation, which includes the following steps:

[0062] S1. Oxidize the arsenic-containing waste, so that the trivalent arsenic in the waste is oxidized to pentavalent arsenic, which reduces the toxicity to microorganisms in the activated sludge; trivalent arsenic is highly toxic and has a significant toxic effect on microorganisms, so first carry out Oxidation, and there are many ways to oxidize trivalent arsenic to pentavalent arsenic, but I will not describe more.

[0063] S2. Put the oxidized arsenic-containing waste into the three-dimensional aeration tank, and add activated sludge in the three-dimensional aeration tank; the concentration of heavy metal ions in the added pentavalent arsenic waste should be less than 30 mg•L-1, so that the activated sludge has no effect on arsenic The removal rate of ions is higher.

[0064] S3. The three-...

Embodiment 2

[0068] Embodiment two, such as Figure 1 to Figure 14 As shown, it discloses that the three-dimensional aeration tank includes two matched reinforced concrete first columns 1, and several layers of aeration tanks 3 with a rectangular horizontal cross-section are arranged on the first column 1, and the aeration tanks 3 The vertical section is semicircular, and the space for installing the wind-driven rotating mechanism 4 is reserved between the upper and lower layers of the aeration tank 3. The aeration tank 3 is provided with a stirring device 2, and the wind-driven rotating mechanism 4 It is connected with the agitation device 2 in the aeration tank 3 on the upper floor. The side of the first column 1 is provided with a first drive motor 38 corresponding to the agitation device 2. A controller is provided in the control room corresponding to the first drive motor 38. . The aeration tank is set up in multiple layers, first of all, it occupies a small area, and secondly, it ca...

Embodiment 3

[0078] Embodiment 3. This embodiment provides an aeration method for a three-dimensional aeration tank, which includes the following steps:

[0079]A. Monitor the on-site wind force. When the wind force is greater than or equal to level 4, the tensioning mechanism tensions the belt, the first drive motor drives the rotating shaft to rotate, and the rotating rod is driven to rotate through the belt drive, so that the rotating rod is in a vertical state and slides The sleeve drives the windshield to move down under the action of gravity, and then the first drive motor exits, and the wind pushes the lower windshield to drive the rotating rod to rotate. When the rotating rod is horizontal, the sliding sleeve is located in the middle of the rotating rod under the action of the spring and rotates The rod continues to rotate, and at this time, the sliding sleeve will fall to the lower part of the rotating rod due to gravity, and continue to push the rotating rod to rotate in one direc...

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Abstract

The invention provides a harmless treatment process of arsenic-containing hazardous waste biological oxidation method, which includes the following steps: oxidizing arsenic-containing waste; putting the oxidized arsenic-containing waste into a three-dimensional aeration tank, adding active Sludge; the three-dimensional aeration tank drives the stirring device and the air intake mechanism to stir the arsenic-containing waste and activated sludge in the aeration tank by intercepting the wind force and the city electric drive motor; the fully aerated waste and activated sludge are sent to After entering the sedimentation tank, the activated sludge is separated from the clarified water, and the clarified water overflows and is discharged; during the treatment process, the activated sludge continues to grow, and the remaining sludge is removed in the sedimentation tank. The invention uses activated sludge to absorb arsenic ions in arsenic-containing waste to solve the environmental pollution of arsenic-containing hazardous waste, and is directly driven by wind to cooperate with the unique structure of the aeration tank, without the need for electric energy or a small amount of electric energy Complete the function of the aeration tank and reduce the secondary pollution of thermal power.

Description

technical field [0001] The invention relates to the technical field of environmental pollution control, in particular to a harmless treatment process of arsenic-containing hazardous waste biological oxidation method. Background technique [0002] Arsenic and its compounds are highly toxic carcinogens, so if it is not controlled, it will easily pollute the environment, and once the pollution is formed, it will be difficult to eliminate. Especially once arsenic pollutes the water body and soil, it will eventually enter the human body through the food chain or surface water and groundwater to endanger human health, and incidents of human and animal poisoning also occur from time to time. As the serious harm caused by arsenic-containing waste has become increasingly prominent in recent years, the world has begun to pay more attention to this environmental problem. How to research and develop an efficient and economical arsenic-containing waste treatment technology has great soci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62D3/02A62D101/43
Inventor 许立中
Owner 许立中
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