Treatment process for biochemical wastewater

A sewage treatment and biochemical treatment pool technology, applied in biological water/sewage treatment, water/sludge/sewage treatment, sustainable biological treatment, etc., can solve the problem that the effluent cannot meet the effluent requirements, and achieve basic improvement and reflux Increased circulation rate and enhanced stabilization effects

Active Publication Date: 2019-02-05
恩格拜(武汉)生态科技有限公司
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  • Claims
  • Application Information

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Problems solved by technology

However, the effluent of the BioDopp process does not meet the recent higher effluent requirements proposed by the government, such as surface water category IV or III standards

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  • Treatment process for biochemical wastewater

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specific Embodiment example 1

[0042] Concrete implementation example 1, the present invention provides a kind of biochemical sewage treatment process, and its realization method comprises the following steps: (1) sewage is through pretreatment (grid, grit chamber), removes larger suspended matter and grit, then enters this The unit described in the invention—the biochemical pool, the influent water quality requirement TCOD: TN>4; (2) In the biochemical pool, the concentration of activated sludge is 8000 mg / L, and the sewage degrades COD, ammonia nitrogen, Nitrate nitrogen, the effluent in the final clarification area meets the requirements of surface water IV class water body COD3 , the treated water volume is 8000m 3 / d, where the main aeration zone is 70m x 8m x 6m (length x width x height), the clarification zone is 70m x 4m x5m (length x width x height), and the sludge stabilization zone (channel) is below the clarification zone. Located on one side of the clarification zone, the size of the airlift zo...

specific Embodiment example 2

[0043] Concrete implementation case 2, the present invention provides a kind of biochemical sewage treatment process, and its realization mode comprises the following steps: (1) water intake 100m 3 / d, due to the large fluctuation of water inflow in the morning, noon and evening every day, a regulating pool of 40m is installed 3 , the residence time of the regulating pond is 10 hours, which is used to balance the water quantity and water quality, and at the same time, the larger particles and sediment in the regulating pond are separated, and the cleaning period of the regulating pond is 3 years; (2) The regulating pond is equipped with a submersible pump Q=4m 3 / h, head 15m, uniformly enters the biochemical treatment pool, and the effluent meets the requirements of the fourth category of surface water, that is, COD<20mg / L, TN<1.5mg / L; (3) The biochemical treatment pool is 12m long and is divided into two parts in the width range There are two main units: the main aeration are...

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Abstract

The invention relates to a treatment process for biochemical wastewater. Compared with all conventional processes, the treatment process is characterized in that reverse cycle mixing and a higher circulating ratio are applied to a biochemical treatment tank (1). Limited dissolved oxygen is controlled in a main aeration zone (6), a sewage influent mixing point (4) in the main aeration zone is arranged in the other side, away from a gas stripping device (2), in the biochemical reaction tank (1), the gas stripping device (2) circulates mixed liquid back to the main aeration zone (6) through a sludge stabilization zone (channel), and a clarification unit (3) for clarifying effluents (5) is arranged in the sludge stabilization zone (channel). According to the treatment process, the dissolved oxygen concentration of the mixed liquid after gas stripping (2) is increased, so that activated sludge is additionally stabilized, the sewage treatment capacity is continuously improved, substances difficult to biologically treated are degraded, the content of nitrogenous substances in the effluents is minimized, and the residual sludge is reduced.

Description

technical field [0001] The invention relates to a biochemical sewage treatment process, which is applied to the field of advanced biochemical water treatment. Compared with the prior art, the present invention especially relates to increasing the circulation of substances in the biochemical treatment pond, and adopting a new circulation direction and method. Background technique [0002] Over the past few decades, the classic biochemical water treatment process has been continuously improved. At present, the classic biochemical water treatment process usually includes a primary settling tank, an activated sludge biochemical treatment tank, and a secondary settling tank, wherein the sludge from the secondary settling tank flows back to the biochemical treatment tank. For example, the AO or AAO process adopts 2-level or 3-level biochemical treatment (anaerobic, anoxic, aerobic), or SBR process, which are current international conventional technologies. In order to better pro...

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Application Information

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IPC IPC(8): C02F3/12
CPCC02F3/12Y02W10/10
Inventor维克·恩格拜李明
Owner恩格拜(武汉)生态科技有限公司