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Shallow pool treatment unit design method based on ecological safety control

A technology of treatment unit and design method, which is applied in the field of advanced sewage treatment, can solve problems such as no design method, and achieve the effect of ensuring safety

Active Publication Date: 2019-10-25
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

However, since the shallow pool is an emerging processing unit, there is still no related design method

Method used

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  • Shallow pool treatment unit design method based on ecological safety control
  • Shallow pool treatment unit design method based on ecological safety control
  • Shallow pool treatment unit design method based on ecological safety control

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Shallow pool processing unit plane structure such as figure 2 shown. according to figure 1 The instructions carefully describe the design method:

[0029] The acute toxicity test of luminescent bacteria (Virbio fischeri) was determined by the microplate toxicity method with reference to the modified ISO11348 method, and phenol was used as a positive control compound. According to the obtained meter-response curve, determine the EC of sewage 50 value, and convert it to the concentration of the positive control compound (expressed as TEQ phenol ). Plot the toxicity value of the effluent against the treatment time of the shallow pond. Fitting was performed using the k-C* model. The k-C* model fitting curve of the acute toxicity of luminescent bacteria in sewage is as follows image 3 shown.

[0030] Query the toxicological data of the positive control compound phenol from the US EPA ECOTOX database (http: / / cfpub.epa.gov / ecotox / ). After screening and eliminating ou...

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Abstract

The invention relates to a shallow pool treatment unit design method based on ecological safety control. According to the method, a k-C * model is used for fitting the dynamic attenuation characteristic of the acute toxicity of the luminous bacteria of the sewage in a shallow pool. The 5% harmful concentration of a positive control compound is estimated in the acute toxicity detection of the luminous bacteria by utilizing an SSD curve. The value is taken as a toxicity threshold value for guaranteeing ecological safety. The value is substituted into the k-C * model, and then the time requiredfor treating a certain flow of sewage is determined. The relationship between the water depth and the treatment area of the shallow pool treatment unit is obtained. In order to ensure that sunlight can completely penetrate through a sewage layer in the shallow pool. The water depth does not exceed 50cm. Finally, the minimum treatment area can be determined according to the designed water depth ofthe shallow pool. According to the method, the ecological safety of advanced sewage treatment is comprehensively considered. The safety of a sewage receiving water body or aquatic organisms in sewagereuse is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of advanced sewage treatment, and in particular relates to a shallow pool treatment unit design method based on ecological security control, which can be applied to the advanced treatment of secondary treatment effluent in sewage plants. Background technique [0002] In recent years, shallow pools, as a water ecological treatment unit that strengthens natural photolysis, have gradually received widespread attention in the field of sewage treatment. The shallow pool was first used as a unit of the surface flow constructed wetland system, and operated by plug flow. It is mainly composed of multiple sets of rectangular shallow pools (water depth ≤ 50cm), with waterproof lining at the bottom, and no aquatic plants are planted. Compared with artificial wetlands, shallow pool treatment units have the following advantages: ① Natural light is not blocked by floating water and emergent plants, and can fully penetrate...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02W10/37
Inventor 马晓妍王晓昌王永坤郑于聪唐磊张世莹
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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