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Dosing technology for assisting agent for sewage biochemical treatment

A technology of biochemical treatment and pharmaceuticals, applied in the direction of sustainable biological treatment, aerobic process treatment, chemical instruments and methods, etc., can solve the problems of complex operation management, high equipment failure rate, complex and accurate dosing, etc., and achieve simple operation management , high safety performance and stable performance

Active Publication Date: 2015-07-15
TIANJIN HUANCHUANG TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in practical engineering applications, complex chemical dissolution and precise dosing methods are generally used, and even imported devices are used to improve the stability of the system
High equipment failure rate, complex operation management, high investment, and poor safety performance are the disadvantages of traditional chemical dosing

Method used

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  • Dosing technology for assisting agent for sewage biochemical treatment
  • Dosing technology for assisting agent for sewage biochemical treatment
  • Dosing technology for assisting agent for sewage biochemical treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A centralized sewage treatment plant in a chemical industry park, with a treatment scale of 20,000m 3 / d, using the carbon-injected activated sludge method (PACT), the dosage of powdered activated carbon is 50mg / L, such as figure 1 Shown:

[0031] The size of the biochemical aeration tank 1 is Φ41.00m*H7.00m, and the hydraulic retention time in the aerobic aerobic zone is 16h.

[0032] Install a fixed bracket 8 on the inner wall near the water inlet of the biochemical aeration tank 1, and then place a drug-dissolving box 2 on the fixed bracket 8. The drug-dissolving box 2 is welded by mesh-shaped steel plates, length*width*height=3.00 m*3.00m*2.20m, the top opening is flush with the mouth of the biochemical aeration tank 1, the side and the bottom surface are opened, and the mesh diameter is 35mm; the bottom surface is submerged 1.20 meters below the liquid level of the biochemical aeration tank 1; the fixed bracket 8 is made of Angle steel splicing, such as figure ...

Embodiment 2

[0046] A comprehensive sewage treatment plant with a treatment scale of 20,000m 3 / d, supplemented by chemical phosphorus removal process, the dosage of basic aluminum chloride is 20mg / L.

[0047] Two biochemical aeration tanks, size: length 48.00m*width 26.00m*height 6m, of which the hydraulic retention time in the aerobic zone is 10h.

[0048] Install a fixed bracket 8 on the inner wall near the water inlet of the biochemical aeration tank 1, and then place a drug-dissolving box 2 on the fixed bracket 8. The drug-dissolving box 2 is welded by a mesh plate, and the length*width*height=2.0 m*2.0m*2.0m, the top opening is flush with the mouth of the biochemical aeration tank 1, the mesh diameter is 4mm; the bottom surface is submerged 1.0 meters below the liquid level of the biochemical aeration tank 1; the fixed bracket 8 is spliced ​​by angle steel, like figure 2 shown;

[0049] The perforated aeration pipe 3 is distributed below the bottom surface of the dissolving medic...

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Abstract

The invention relates to a dosing technology for an assisting agent for sewage biochemical treatment. Bagged solid materials are conveyed into a mesh agent-dissolving box in a biochemical aeration tank, the agent in the agent-dissolving box is mixed and dissolved through stirring action of the air and then enters the aeration tank from the meshes of the agent-dissolving box, the packaging bags in the agent-dissolving box are cleared away by workers at regular intervals, and perforating aeration pipes are arranged at the bottom of the agent-dissolving box and used for stirring by air. The dosing technology has the technical characteristics of being simple, having stable performance and high safety performance.

Description

technical field [0001] The invention relates to a process for adding auxiliary chemicals for biochemical treatment of sewage, which belongs to the field of sewage treatment. Background technique [0002] As my country continues to strengthen environmental protection, the requirements for sewage treatment are gradually increasing. In the most commonly used sewage biochemical treatment field, adding auxiliary chemicals has become one of the main application technologies. At present, the more commonly used agents usually include chemical phosphorus removal agents (mainly iron-based, aluminum-based and other soluble salts), organic carbon sources (glucose, methanol, starch, etc.), sludge modifiers (powdered activated carbon, silicon algae, sand and other insoluble substances). [0003] Under normal circumstances, due to the long hydraulic retention time of the biochemical pool and its strong buffer capacity, the dosage does not require a high degree of accuracy. However, in ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/02B01F1/00
CPCY02W10/10
Inventor 薛艳张大鹏叶方清李晖
Owner TIANJIN HUANCHUANG TECH DEV CO LTD