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A kind of enhanced activated sludge sewage treatment process

A technology of activated sludge method and sewage treatment, applied in water/sludge/sewage treatment, biological water/sewage treatment, aerobic and anaerobic process treatment, etc. Concentration is difficult to maintain, long sludge age and other problems, to achieve the effect of improving the flow state of the reactor, enhancing performance, and multi-degradation

Active Publication Date: 2022-02-08
恩格拜(武汉)生态科技有限公司
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  • Application Information

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Problems solved by technology

Even though it was reported in 1985 that Rittmann and Langeland applied synchronous nitrification and denitrification to basically achieve 100% nitrogen removal, but the parameter design of successful cases in the past was extremely conservative, and there was no parameter combination to ensure stable and reliable operation of the system
At the same time, according to the relevant theory of SND, if nitrifying bacteria want to grow and reproduce in the environment of low DO or even zero DO, they must have a longer sludge age (providing a greater safety factor), thus requiring a high MLSS concentration, while "healthy" "The high sludge concentration is difficult to maintain

Method used

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  • A kind of enhanced activated sludge sewage treatment process

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specific Embodiment example 1

[0038] Concrete implementation case 1, the present invention provides a kind of enhanced activated sludge process sewage treatment process, and its realization method comprises the following steps: (1) sewage is through pretreatment (grid, grit chamber), removes larger suspended solids and grit , then enter the unit of the present invention---biochemical tank, the water quality requirement of influent TCOD:TN>4; (2) in the biochemical tank, the activated sludge concentration is 8000mg / L, and the sewage degrades synchronously within 12 hours of residence time COD, ammonia nitrogen, nitrate nitrogen, the effluent in the final clarification area meets the requirements of surface water type III water body, COD3 , the treated water volume is 1000m 3 / d, where the main aeration zone is 15m×4.4m×5m (length×width×height), the clarification zone is 12m×3.6m×4m (length×width×height), and the sludge stabilization zone (return channel) is below the clarification zone ), the air lift is lo...

specific Embodiment example 2

[0039] Concrete implementation case 2, the present invention provides a kind of enhanced activated sludge method sewage treatment process, and its realization method comprises the following steps: (1) this project is a standard improvement project, and the water inflow is 20000m 3 / d, part of which is the first-level A effluent of the upstream oxidation ditch, and part of which is the pretreated raw water, equipped with a carbon source (sodium acetate or ethanol, etc.) dosing device to ensure TCOD: TN>4; (2) Influent COD 3 , where the main aeration zone is 57.5m×12.8m×6m (length×width×height), the clarification zone is 52.5m×9.6m×5.0m (length×width×height), and the sludge stabilization zone (channel ), the air lift is located on one side of the clarification area, and the size of the air lift area is 11.6m × 1m × 6m (length × width × height); (4) the oxygen supply of the main aeration area is 176kgO 2 / h, as the influent concentration fluctuates, maintain a low dissolved oxyge...

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Abstract

The invention relates to an enhanced activated sludge sewage treatment process. Compared with the traditional activated sludge process, the process configures an influent premixing zone, fully mixes the influent and part of the circulating reflux liquid, and gives a certain residence time before entering the process. At the same time, the whole tank (including the water premixing area) adopts precise dissolved oxygen control, which can further enhance the sludge activity, improve the pollutant degradation efficiency of activated sludge, and achieve better effluent water quality, thus providing a kind of Excellent environmental protection method.

Description

technical field [0001] The invention relates to an enhanced activated sludge sewage treatment process, which is applied to the field of advanced biochemical water treatment. Background technique [0002] In 1914, E.Ardern and W.T.Lockett founded the activated sludge process; in the 1950s and 1960s, related theories were created and developed; and in the past few decades, the classic biochemical water treatment process has been continuously improved. From international conventional technologies (A / O, AAO, secondary or tertiary biochemical treatment, SBR, etc.) to various emerging technologies, the stability of activated sludge process has been continuously improved. , Oxygen transfer rate, etc.) have been improved, and the activated sludge method has also been applied on a large scale. [0003] At present, due to the objective requirements of the environment and the improvement of the technical level, my country's requirements for sewage treatment are also continuously incre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/30
CPCC02F3/302C02F3/301
Inventor 维克·恩格拜李明鄢紫
Owner 恩格拜(武汉)生态科技有限公司
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