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A small fluidized bed sewage treatment system and its operation method

The technology of a sewage treatment system and operation method, which is applied in the field of sewage treatment, can solve the problems that do not involve small-scale dispersed sewage, etc., and achieve the effects of good sludge settleability, reduced consumption, and small production volume

Active Publication Date: 2016-04-20
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] None of the above patents involve the use of gas-liquid-solid three-phase fluidized bed for small-scale decentralized sewage treatment

Method used

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  • A small fluidized bed sewage treatment system and its operation method
  • A small fluidized bed sewage treatment system and its operation method
  • A small fluidized bed sewage treatment system and its operation method

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Such as figure 1 As shown in or 3, a small-scale fluidized bed sewage treatment system includes aerobic fluidized bed 1, anoxic / anaerobic fluidized bed 2, bed material particle regeneration bed 3 and sewage Mud sedimentation bed 4; the aerobic fluidized bed 1 and the anoxic / anaerobic fluidized bed 2 are filled with solid bed materials, and active biofilms grow on the solid bed materials, and the aerobic fluidized bed 1 There is also an aeration device 5 inside, and the middle and upper part of the adjacent side of the aerobic fluidized bed 1 and the anoxic / anaerobic fluidized bed 2 is provided with a bed material particle circulation port 6, and an aerobic fluidized fluidized bed is provided at the upper part. Bed outlet 7; the upper interface of the solid bed material dense phase area in the aerobic fluidized bed 1 and the anoxic / anaerobic fluidized bed 2 is slightly lower than the bed material particle circulation port 6; the aerobic fluidized bed 1 The outlet 7 of t...

Embodiment 2

[0048] A small-scale fluidized bed sewage treatment system, referring to Example 1, the difference is that: the aeration device 5 is arranged in pairs and divided into three layers at the bottom and upper part of the aerobic fluidized bed 1, and the aeration device 5 uses sewage In addition to the commonly used M215 disc aeration head in processing engineering, microporous aeration tubes or other aeration devices that can achieve the same effect can also be used; the bed material return port 8 is equipped with an L return valve, which adopts direct sedimentation return Material; the outlet 9 of the regenerated bed particles of the bed material is provided with a filter screen.

[0049] In the operation method of the above-mentioned small-scale fluidized bed sewage treatment system, the raw sewage first enters the anoxic / anaerobic fluidized bed 2 through the water inlet provided at the bottom of the anoxic / anaerobic fluidized bed 2 for denitrification, nitrogen removal, and phos...

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Abstract

The invention discloses a small fluidized bed sewage treatment system and an operating method thereof. The sewage treatment system is simple and compact in structure, small in occupied area, and strong in process adaptability; when used for treating sewage, the sewage treatment system has the advantages that the operating cost is low and less sludge is produced; the sewage treatment system is wide in application range, and can simultaneously treat soluble and particle-containing wastewater, and can run stably; and by adjusting the air supply proportion of aeration devices at the bottom and upper parts of an aerobic fluidized bed, the internal circulation or non-circulation of solid bed materials on which active biofilms grow is implemented; therefore, the sewage treatment system is especially suitable for the field of small-scale sewage treatment.

Description

Technical field: [0001] The invention relates to the field of sewage treatment, in particular to a small fluidized bed sewage treatment system and an operating method thereof. Background technique: [0002] The "12th Five-Year Plan" Comprehensive Work Plan for Energy Conservation and Emission Reduction (Guo Fa [2011] No. 26) promotes the construction of urban sewage treatment facilities and supporting pipe networks, upgrades existing facilities, and strengthens nitrogen and phosphorus removal. By 2015, basically realize that all counties and key towns have sewage treatment capacity, increase the daily sewage treatment capacity of 42 million tons nationwide, build about 160,000 kilometers of supporting pipe networks, and achieve an urban sewage treatment rate of 85%, forming a chemical oxygen demand and ammonia nitrogen reduction capacity of 2.8 million tons and 300,000 tons. Continue to promote the special action of energy-saving and emission-reduction science and technolog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
Inventor 李海滨祝京旭赵增立王小波刘安琪钟慧琼
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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