SBR-like running method of low load A<2>O technology

An operation method and process technology, which is applied in the field of SBR-like operation of low-load A2O process, can solve the problems of energy waste, decline in facility utilization rate, and greatly improved effluent water quality, and achieve the effect of avoiding design

Pending Publication Date: 2017-06-20
CHINA HUADIAN SCI & TECH INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, since there is no obvious technological progress, the effluent water quality has not been greatly improved due to the improvement of the influent water quality. At this time, the utilization rate of the facilities actually decreases, and the energy consumption per unit of pollutant removal also increases. resulting in actual waste of energy

Method used

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  • SBR-like running method of low load A&lt;2&gt;O technology
  • SBR-like running method of low load A&lt;2&gt;O technology
  • SBR-like running method of low load A&lt;2&gt;O technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] See figure 1 , which is A in this example 2 O process schematic.

[0034] A 2 O system, the residence time of O pool is 10h, and the designed influent water quality is COD500mg / L, NH 4 + -N is 55mg / L, the actual influent water quality is better than the design value, the influent COD is 200-280mg / L, and the influent NH 4 + -N is 20~30mg / L, that is, the main pollutant index is about 50% of the design value, and it is divided into the front section of the O pool according to the influent flow direction (O 1 ) and after-work section (O 2 ), the function settings are respectively class SBR segment (O 1 ) and the absolute O segment (O 2 ), there is no physical separation between the two sections, and the effective volume of the SBR-like section accounts for 70% of the effective volume of the O pool, and its DO value is set according to Figure 3D The "low-medium" mode is cycled, with the low value set at 0.8mg / L and the medium value set at 2.2mg / L. The effective vo...

Embodiment 2

[0039] See Figure 4 , which is A in this example 2 O process schematic.

[0040] A 2 O system, including anaerobic pools (A 1 pool) 10, anoxic pool (A 2 pool) 20 and aerobic pool (O pool) 30, wherein, according to the water flow direction O pool space is divided into three sections: class SBR section (O pool) 1 ) 31. Absolute aerobic segment (O 2 )32 and hypoxic segment (O 3 )33, wherein the effective volume of the SBR-like section accounts for 35% of the effective volume fraction of the O pool, the effective volume of the absolute O section accounts for 55% of the effective volume fraction of the O pool, and the hypoxic section accounts for 10% of the effective volume fraction of the O pool. The three sections are all separated by the diverting baffle 34 of water flow, and the proportion of direct flow of water flow is about 30%. An aeration pipeline 35 is arranged in the SBR-like section, and the aeration pipeline is provided with a gas flow regulating valve 351 cont...

Embodiment 3

[0044] See Figure 5 , which is A in this example 2 O process schematic.

[0045] A 2 O system, including anaerobic pools (A 1 pool) 10, anoxic pool (A 2 pool) 20 and aerobic pool (O pool) 30, wherein, according to the water flow direction O pool space is divided into two sections: class SBR section (O pool) 1 ) 31. Absolute aerobic segment (O 2 )32, wherein the effective volume of the SBR-like segment accounts for 40% of the effective volume fraction of the O pool, and the absolute O segment effective volume accounts for 60% of the effective volume fraction of the O pool. The two sections are separated by a water flow steering baffle 34, and the direct flow ratio of the water flow is about 35%. An aeration pipeline 35 is arranged in the SBR-like section, and the aeration pipeline is provided with a gas flow regulating valve 351 controlled by an intelligent control system 36 . Moreover, the end of the SBR-like section is provided with a return port 311, and the return p...

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Abstract

The invention provides an SBR-like running method of a low load A<2>O technology. The method comprises the following steps: carrying out time division on an O tank in the A<2>O technology, arranging the front part of the O tank in the flow direction of inlet water to be an O tank front section, and respectively setting the function of the O tank front section to be an SBR-like section, wherein the DO value is set to circularly run in a preset mode, and the circulating period is partially or completely consistent with that of peak-valley electricity price. The peak-valley electricity price-based low load A<2>O system energy-saving running method can realize energy saving and consumption reduction when the running load is reduced.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a low-load A 2 The SBR-like operation method of the O process. Background technique [0002] A 2 The O process (Anaerobic-Anoxic-Oxic method) is one of the mainstream processes used in sewage treatment plants at present. It is a typical process to achieve the first-class A standard of effluent, and has been widely used in the past ten years. A 2 The O process mainly includes two A sections (anaerobic section, anoxic section) and one O section (aerobic section). out of water. Among them, the anaerobic section: the raw sewage and the phosphorus-containing return sludge discharged from the sedimentation tank enter the anaerobic reactor synchronously. The main function of this unit is to release phosphorus, and at the same time, part of the organic matter is ammonified; anoxic section: the primary function is to denitrify , nitrate nitrogen is sent from the aerobic sect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F3/12
CPCC02F3/1263C02F3/30Y02W10/10
Inventor 李宗慧张宇龙孔飞段翠佳彭敏洪博邹重恩
Owner CHINA HUADIAN SCI & TECH INST
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