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a kind of clo 2 Method for advanced treatment of sewage biochemical tail water with effervescent tablets

An advanced treatment, effervescent tablet technology, applied in chemical instruments and methods, oxidized water/sewage treatment, water/sludge/sewage treatment, etc. Easy engineering application, excellent strong oxidizing properties, effect of reducing extra cost

Active Publication Date: 2021-07-09
中原环保知和(郑州)水环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unlike high-concentration sewage with better biodegradability, the main components of biochemical tail water are low-concentration refractory substances; no literature has been found to use ClO 2 Effervescent tablets directly treat the actual municipal or industrial tail water, that is, the method of low-concentration sewage with extremely low biodegradability. The main reason may be that the existing technology ignores ClO 2 The super oxidizing properties of effervescent tablets can also degrade refractory substances in tail water

Method used

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  • a kind of clo <sub>2</sub> Method for advanced treatment of sewage biochemical tail water with effervescent tablets
  • a kind of clo <sub>2</sub> Method for advanced treatment of sewage biochemical tail water with effervescent tablets
  • a kind of clo <sub>2</sub> Method for advanced treatment of sewage biochemical tail water with effervescent tablets

Examples

Experimental program
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Effect test

Embodiment 1

[0018] The technology of the invention is used to treat the biochemical tail water of a certain municipal sewage treatment plant. The biochemical tail water is taken from the effluent of the secondary sedimentation tank of the municipal sewage treatment plant of an oxidation ditch treatment process. The basic characteristic of the water quality is COD Cr It is 30mg / L, the color is 30 times, the pH is 7.2-7.4, ClO 2 The dosing concentration of effervescent tablets is 100mg / L, the experimental temperature is 25°C, and the mechanical stirring time is 60min. COD in this embodiment Cr The removal rate is 90%, and the chroma removal rate is 93.3%. The monitoring data are shown in Table 1.

[0019] The monitoring data of table 1 embodiment 1

[0020] COD (mg / L) Chroma (times) pH value flooded 30 (mean) 30 7.2～7.4 out of water 3 2 7.3～7.6 Removal rate (%) 90 93.3 /

Embodiment 2

[0022] The technology of the invention is used to treat the biochemical tail water of a certain natural pigment production wastewater plant. The biochemical tail water is taken from the effluent of the secondary sedimentation tank of a natural pigment production wastewater biochemical system. The basic characteristic of the water quality is COD Cr It is 180mg / L, the chromaticity is higher, it is 500 times, the pH is 8.1-8.4, ClO 2 The dosing concentration of effervescent tablets is 150mg / L, the experimental temperature is 25°C, and the mechanical stirring time is 50min. COD in this embodiment Cr The removal rate is 77.2%, which is basically close to that of Class V water on the surface, and the chroma removal rate is 94%. The monitoring data are shown in Table 2.

[0023] The monitoring data of table 2 embodiment 2

[0024] COD (mg / L) Chroma (times) pH value flooded 180 (mean) 500 8.1～8.4 out of water 41 30 8.1～8.5 Removal rate (%) 77....

Embodiment 3

[0026] The technology of the invention is used to treat the biochemical tail water of a certain papermaking wastewater biochemical system. The biochemical tail water is taken from the effluent of the secondary sedimentation tank of a papermaking wastewater biochemical system. The basic characteristic of the water quality is COD Cr It is 120mg / L, the chromaticity is 170 times, the pH is 7.4-7.6, ClO 2 The dosing concentration of effervescent tablets is 150mg / L, the experimental temperature is 25°C, and the mechanical stirring time is 30min. COD in this embodiment Cr The removal rate is 62.5%, which is basically close to the surface water category V, and the color removal rate is 82.3%. The monitoring data are shown in Table 3.

[0027] The monitoring data of table 3 embodiment 3

[0028] COD (mg / L) Chroma (times) pH value flooded 120 (mean) 170 7.4～7.6 out of water 45 30 7.2～7.6 Removal rate (%) 62.5 82.3 /

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Abstract

The present invention relates to a kind of ClO 2 The method for the advanced treatment of sewage biochemical tail water with effervescent tablets, specifically adopts the following technical scheme: the ClO 2 Add effervescent tablets into distilled water to make a high-concentration stock solution, which is ready-to-use; add the stock solution to the sewage biochemical tail water, so that the ClO 2 The concentration of the effervescent tablet in the biochemical tail water of the sewage is 10-200 mg / L; after mechanical stirring for 30-60 min, the COD and chromaticity changes before and after the reaction were compared. The COD concentration of the sewage biochemical tail water is: municipal tail water: COD≤30mg / L, industrial tail water: COD≤200mg / L. The invention can quickly and efficiently remove refractory organic matter in sewage biochemical effluent, and has good applicability to sewage with a pH of 5-9, and has strong application prospects in the actual application of advanced treatment of tail water.

Description

technical field [0001] The invention belongs to the technical field of advanced treatment and reuse of sewage tail water, and specifically relates to a ClO 2 A method for advanced treatment of sewage biochemical tail water by effervescent tablets. Background technique [0002] Facing the dual pressure of water resource shortage and rising urban sewage discharge standards, it is particularly important to carry out reasonable advanced treatment of the biochemical tail water of urban sewage treatment plants to make it meet the reuse standards. The reuse of tail water can maximize the use of water resources and reduce the demand for fresh water, which is conducive to sustainable economic development and social progress, and is widely recognized for its economic feasibility and environmental friendliness. However, municipal tail water is usually the secondary biochemical effluent of sewage treatment plants, BOD 5 / COD is far less than 0.3, it is difficult to degrade through con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/76C02F101/30
CPCC02F1/76C02F2101/30
Inventor 李海松王倩文米昌斌李华伟李玉泽
Owner 中原环保知和(郑州)水环境科技有限公司
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