Method for operating sewage treatment fluidized bed

A technology of sewage treatment and operation method, applied in biological water/sewage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of high operating energy consumption of sewage treatment technology, and reduce the energy consumption of aeration , The effect of reducing the loss of bed material particles and reducing operating costs

Active Publication Date: 2017-06-13
GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for operating a sewage treatment fluidized bed to solve the problem of high energy consumption in the operation of the existing fluidized bed sewage treatment technology

Method used

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  • Method for operating sewage treatment fluidized bed
  • Method for operating sewage treatment fluidized bed
  • Method for operating sewage treatment fluidized bed

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as Figure 1~3 As shown, a low-energy operation method for a fluidized bed for sewage treatment, which is provided with an aeration cycle and a circulating water cycle, by periodically and alternately feeding circulating water and gas to the bottom of the fluidized bed to make the fluidized bed The bed material particles loaded with biofilm are in a fluidized state.

[0035] Such as figure 1 As shown, the operation of the aeration cycle in this embodiment is as follows: during the aeration cycle, stop feeding circulating water to the bottom of the fluidized bed, only feed gas to the bottom of the fluidized bed, and only use the gas and the water flow driven by the gas to make the The bed material particles maintain a fluidized state. During this cycle, the bed material particles in the fluidized bed are fluidized under the action of air bubbles formed by aeration and the water flow driven by the bubbles, and a large number of bed material particles are entrained ...

Embodiment 2

[0046] A low-energy operation method for a fluidized bed for sewage treatment, which is provided with an aeration cycle and a circulating water cycle, and periodically and alternately feeds circulating water and gas to the bottom of the fluidized bed so that the fluidized bed is loaded with biological The bed material particles of the membrane are in a fluidized state.

[0047] Such as Figure 4 Shown is the operation of the aeration cycle of this embodiment: in the aeration cycle, circulating water and gas are introduced to the bottom of the fluidized bed at the same time, and the bed material particles in the fluidized bed are driven by the air bubbles and air bubbles formed by aeration. Fluidization is achieved under the joint action of the water flow and circulating water. During this cycle, the bed material particles in the fluidized bed are fluidized under the joint action of air bubbles formed by aeration, water flow driven by the bubbles, and circulating water, and a ...

Embodiment 3

[0060] Referring to Example 2, the difference between Example 3 and Example 2 is that the ratio of the duration of the aeration cycle to the water circulation cycle is 70:30. As shown in the table below, it is the index comparison table 3 between the water quality obtained by the operation of the fluidized bed in the manner of embodiment 3 and the water quality obtained by the operation of the fluidized bed in the manner of continuous water intake and air intake. There is no significant difference between the water quality obtained by the method 3 and the water quality obtained by the continuous water intake method, and both meet the sewage treatment standards, that is, the water quality treated by the method 3 of this embodiment meets the sewage treatment requirements. Through the operation mode of Embodiment 3 of the present invention, the operating energy consumption of the fluidized bed can be reduced to about 1 / 2 of the operating energy consumption of the fluidized bed und...

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Abstract

The invention discloses a method for operating a sewage treatment fluidized bed. The method has an aeration period and a circulating water period, and enables bio-membrane-loaded bed particles on the fluidized bed to be in a fluidized state by periodically and alternately introducing circulating water and gas to the bottom of the fluidized bed, wherein, in the aeration period, introduction of circulating water to the bottom of the fluidized bed is stopped, only air is introduced to the bottom of the fluidized bed, and the air and water flow driven by the air enable the bed particles to keep a fluidized state; in the circulating water period, introduction of air to the bottom of the fluidized bed is stopped, only circulating water is introduced to the bottom of the fluidized bed, all bed particles are kept in the fluidized state by virtue of the circulating water; and the duration ratio of the aeration period to the circulating water period is between 70:30 and 95:5. Compared with the prior art, the method has the advantages that bed particle loss can be reduced, aeration energy consumption of a sewage treatment system can be reduced, and the operation cost of the sewage treatment system can be reduced. The method is especially applicable to the field of small-sized fluidized bed sewage treatment.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to an operating method of a fluidized bed for sewage treatment. Background technique [0002] With the rapid increase of wastewater discharge, the increasingly stringent discharge standards and the limitation of resource utilization space, stringent requirements are put forward for the effectiveness of wastewater treatment process and the capacity of treatment equipment. The research and application of biological fluidized bed treatment of sewage began in the 1970s in the US Environmental Protection Agency. This method combines the relevant technical characteristics of microbial membrane method and fluidized bed, and has large specific surface area, high microbial concentration, high volume loading rate and sludge loading rate, fast mass transfer, strong impact load resistance, and strong purification ability, etc. features. [0003] At present, the improvement of fluidized bed and...

Claims

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Application Information

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IPC IPC(8): C02F3/08
CPCC02F3/085C02F2203/006Y02W10/10
Inventor 李海滨祝京旭赵增立王小波刘安琪钟惠琼
Owner GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
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