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Yeast low oxygen SBR process and device aimed to high concentrated organic wastewater

A technology for organic wastewater and yeast, applied in the field of yeast hypoxic SBR process, can solve the problems that have not yet been seen, high pretreatment cost, complex process flow, etc., achieve low sludge output, save operating costs, and have a wide range of applications. Effect

Inactive Publication Date: 2007-11-21
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

[0004] However, although conventional SBR technology has many advantages, it has not been reported that this process is applied to high-concentration organic wastewater.
At present, high-concentration organic wastewater mostly adopts the "anaerobic + aerobic" treatment mode, and the process is complicated. Some special high-concentration organic wastewater such as high oil, high salt, high sulfur, and high ammonia need to be added before biological treatment such as Oil removal, desalination or ammonia blowing processes can only be applied to anaerobic treatment, and some even have to rely on the dilution of different wastewater for biological treatment because of the high cost of pretreatment

Method used

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  • Yeast low oxygen SBR process and device aimed to high concentrated organic wastewater
  • Yeast low oxygen SBR process and device aimed to high concentrated organic wastewater

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Embodiment 1

[0019] The water quality characteristics of an antibiotic production wastewater are shown in Table 1. It is a typical high-nitrogen type and high-concentration organic wastewater. The prior art type needs to add a pretreatment denitrification process before the biological treatment process. The present invention inoculates artificially selected yeast strains with excellent sedimentation properties in the original SBR reaction tank, and starts batch culture. When the MLSS reaches 15g / L, it is directly fed into undiluted waste water to start intermittent aeration treatment. The amount of aeration controls the dissolved oxygen in the SBR reaction tank to ≤0.5mg / L. The operation steps of one cycle are: water intake→aeration→sedimentation→sludge discharge→aeration→sedimentation→decanting water. The hydraulic retention time is 2-3d. The effluent indicators are shown in Table 1.

[0020] COD Cr (mg / L)

Embodiment 2

[0022] The water quality characteristics of an oil refinery wastewater are shown in Table 2, which is a typical high-oil type and high-concentration organic wastewater. In the present invention, the undiluted waste water is used as a culture medium to obtain a yeast microbial community with excellent sedimentation properties by adopting a batch culture and screening scheme, and a microbial provenance for use in the field is obtained after aerobic culture. The microbial source is added to the SBR reaction tank that has been added to this type of organic wastewater. The start-up period is 6 days, and then the undiluted wastewater is introduced to start the treatment. The dissolved oxygen in the SBR reaction tank is controlled to be ≤0.5 by controlling the amount of aeration. mg / L, the operation steps of one cycle are: water intake→aeration→sedimentation→sludge discharge→aeration→sedimentation→sludge discharge→aeration→sedimentation→sludge discharge→aeration→sedimentation→decantin...

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Abstract

The invention relates to a SBR technique and the opposite device with low COD (0-0. 5mg / L) continual or intermittent aeration method for high-concentration organic sewage. Wherein, selecting the yeast population with super performance as the microbe main body; optimizing and designing SBR running period and parameters to let the SBR technique have COD removal ratio more than 90% and fit to different sewage even with COD concentration up to 100000mg / L. This invention also has low sludge output (much less than the aerobic process) and high treatment efficiency (with same capacity load as the aerobic process) with low cost.

Description

technical field [0001] The invention relates to the fields of environmental engineering and wastewater treatment engineering, in particular to a yeast low-oxygen SBR process with high-concentration organic wastewater as the main target. This process is widely applicable to different types of high-concentration organic wastewater including high oil, high salt, high sulfur, high ammonia, etc. Background technique [0002] According to statistics, at present, my country's industrial wastewater accounts for more than 70% of the total sewage volume, of which the annual discharge of alcohol industrial wastewater is about 12 million tons, monosodium glutamate industrial wastewater is 2.5-4 million tons, citric acid industrial wastewater is 1.1 million tons, and starch industrial wastewater is 16 million tons. t. The COD of these wastewaters is generally above 2000mg / L, and some of them reach tens of thousands or even hundreds of thousands of mg / L. They pollute the environmental wa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F3/34C02F101/30
Inventor 郑少奎杨志峰杨凡张燕燕
Owner BEIJING NORMAL UNIVERSITY
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