Advanced treatment process for biochemical effluent in centralized sewage treatment plant

A sewage treatment plant, biochemical water effluent technology, applied in the direction of water/sewage multi-stage treatment, adsorption water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problems of low treatment capacity, short service life, difficult regeneration, etc., to achieve The effect of less ozone consumption and simple process operation

Inactive Publication Date: 2014-09-17
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional activated carbon adsorption has disadvantages such as low processing capacity, short service life, and difficult regeneration.

Method used

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  • Advanced treatment process for biochemical effluent in centralized sewage treatment plant
  • Advanced treatment process for biochemical effluent in centralized sewage treatment plant
  • Advanced treatment process for biochemical effluent in centralized sewage treatment plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Water intake of a centralized sewage treatment plant in an industrial area (10000m 3 60% of / d) is wastewater produced by printing and dyeing, chemical and pharmaceutical companies, and the rest is domestic wastewater. After effective biochemical treatment (A / O process), the sewage still contains a certain amount of organic pollutants. The specific water quality is shown in Table 1. The specific process is shown in the appendix of the manual figure 1 .

[0028] After the biochemical effluent is homogenized for 1 hour in the regulating tank (water temperature is about 25°C), it is pumped into the activated carbon / ozone oxidation tower. Gas-liquid reverse contact reaction, granular activated carbon (specific performance indicators: particle diameter 3-5mm, iodine value about 2088mg / g, phenol value about 82.2mg / g, zero point potential about 7.4) (dosing per unit reactor volume (L) 20g) is in a fluidized state under the action of air flow (unit reactor volume (L) 300L (a...

Embodiment 2

[0034] An urban sewage treatment plant adopts the oxidation ditch process for biochemical treatment, and the quality of biochemical effluent is shown in Table 2.

[0035] After the biochemical effluent is homogenized for 1 hour in the regulating tank (water temperature is about 25°C), it is pumped into the activated carbon adsorption / ozone oxidation tower (ozone contact reactor). Gas-liquid reverse contact reaction, granular activated carbon (specific performance indicators: particle diameter 3-5mm, iodine value about 2088mg / g, phenol value about 82.2mg / g, zero point potential about 7.4) (dosing per unit reactor volume (L) 15g) is in a fluidized state under the action of air flow (unit reactor volume (L) 300L (air) / h), the hydraulic retention time is controlled at 2min, and the ozone concentration is adjusted to 5mg / Nm 3 . Oxidation treatment effluent is mixed with aluminum sulfate (25mg / L, as Al 3+ meter) mixed with a certain amount of sulfuric acid, the pH was adjusted to ...

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Abstract

The invention discloses an advanced treatment process for biochemical effluent in a centralized sewage treatment plant. The treatment process comprises the following steps: subjecting the biochemical effluent to homogenzing, activated carbon / ozone oxidation treatment, and enhanced coagulation treatment in turn. The process provided by the invention is simple in operation, the quality of the treated effluent is better than emission standard, and conditions for realizing the recycling are created.

Description

technical field [0001] The invention relates to a biochemical effluent advanced treatment process of a centralized sewage treatment plant. Background technique [0002] As the main body of current wastewater treatment, although the biochemical system can greatly reduce the concentration of organic pollutants and nutrients such as nitrogen and phosphorus through optimized design and operating parameters, the effluent still contains a certain amount of refractory organic matter. In view of the current situation of national water shortage and aggravated water pollution, national and regional pollutant discharge standards are becoming increasingly strict, which poses great challenges to existing wastewater treatment facilities. On the basis of traditional technology, the development of simple and novel advanced treatment process is the best choice to achieve the discharge of sewage up to the standard, and it also creates conditions for recycling. [0003] Among the commonly use...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/04C02F1/28C02F1/78C02F1/52
Inventor 刘勇弟钱飞跃孙贤波刘新秀
Owner EAST CHINA UNIV OF SCI & TECH
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