Wastewater processing control method for promoting advanced oxidation effect

An advanced oxidation and wastewater treatment technology, applied in the direction of oxidation water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., to achieve the effects of saving chemicals, ensuring reaction speed, and reducing treatment costs

Active Publication Date: 2019-11-15
NANJING UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] Aiming at the problem that in the prior art, when advanced oxidation is used to treat wastewater, the reagents are added simply based on experience without considering the actual water quality of the treated wastewater. The present invention provides a wastewater treatment control method that promotes the effect of advanced oxidation. The heavy metal ions in the sewage regulate the effect of ozone and Fenton oxidation. According to the concentration of heavy metal ions, the dosage ratio of ozone or Fenton reagent in the oxidation process is determined, which can effectively save chemicals and reduce the Operating costs

Method used

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  • Wastewater processing control method for promoting advanced oxidation effect
  • Wastewater processing control method for promoting advanced oxidation effect
  • Wastewater processing control method for promoting advanced oxidation effect

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The wastewater treated in this example is secondary wastewater containing heavy metal ions, and the pH value of the wastewater was adjusted to 7.

[0055] (1) Detect the concentrations of heavy metal ions and organic matter in the wastewater, as shown in Table 1:

[0056] Table 1 Concentration of heavy metal ions and organic matter in wastewater

[0057]

[0058] (2) Calculate the dosage of ozone based on the concentration of heavy metal ions, see formula ① for details:

[0059]

[0060] In the formula: is the concentration of ozone, unit: mg / L; after calculation

[0061] T is the total weight coefficient, where T=3t 1 +3t 2 +t 3 +t 4 +t 5 +t 6 , due to the following metal ions Fe in wastewater 2+ , Mn 2 + , Fe 3+ 、Cu2+ , Zn 2+ 、Ni 2+ exist, so t 1 , t 2 , t 3 , t 4 , t 5 and t 6 The values ​​are all 1, so T=10;

[0062] The values ​​of a, b, c, d, e, f are 2.2, 3.2, 6, 2.2, 3, 3 respectively;

[0063] represent Fe respectively 2+ , Mn ...

Embodiment 2

[0081] The wastewater treated in this example is secondary wastewater containing heavy metal ions, and the pH value of the wastewater was adjusted to 6.

[0082] (1) Detect the concentrations of heavy metal ions and organic matter in the wastewater, as shown in Table 4:

[0083] Table 4 Concentration of heavy metal ions and organic matter in wastewater

[0084]

[0085] (2) Use formula ① to calculate the dosage of ozone based on the concentration of heavy metal ions:

[0086]

[0087] In the formula: is the concentration of ozone, unit: mg / L; after calculation

[0088] T is the total weight coefficient, where T=3t 1 +3t 2 +t 3 +t 4 +t 5 +t 6 ; Due to the following metal ions Fe in wastewater 2+ , Mn 2 + , Fe 3+ 、Cu 2+ , Zn 2+ 、Ni 2+ exist, so t 1 , t 2 , t 3 , t 4 , t 5 and t 6 The values ​​are all 1, so T=10;

[0089] The values ​​of a, b, c, d, e, f are 3, 4, 7, 3, 4, 4 respectively;

[0090] Respectively Fe 2+ , Mn 2+ , Fe 3+ 、Cu 2+ , Z...

Embodiment 3

[0098] The wastewater treated in this example is secondary wastewater containing heavy metal ions, and the pH value of the wastewater was adjusted to 9.

[0099] (1) Detect the concentrations of heavy metal ions and organic matter in the wastewater, as shown in Table 6:

[0100] Table 6 Concentration of heavy metal ions and organic matter in wastewater

[0101]

[0102] (2) Use formula ① to calculate the dosage of ozone based on the concentration of heavy metal ions:

[0103]

[0104] In the formula: is the ozone concentration in mg / L;

[0105] Respectively Fe 2+ , Mn 2+ 、Cu 2+ , Zn 2+ Ion concentration, unit: mmol / L;

[0106] The values ​​of a, b, d, e are 2, 3, 2, 3 respectively;

[0107] T is the total weight coefficient, where T=3t 1 +3t 2 +t 3 +t 4 +t 5 +t 6 ; Since there are only the following metal ions Fe in the wastewater 2 + , Mn 2+ 、Cu 2+ , Zn 2+ exist, so t 1 , t 2 , t 4 , t 5 The values ​​are all 1, t 3 , t 4 , t 6 The values ​...

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Abstract

The invention discloses a wastewater processing control method for promoting the advanced oxidation effect, and belongs to the field of wastewater processing. The method comprises following steps: (1)detecting the kinds and corresponding mole concentrations of heavy metal ions in wastewater; (2) adding an oxidizing agent into wastewater to carry out an advanced oxidation treatment, wherein the addition amount of the oxidizing agent is determined based on the content of heavy metal ions in the wastewater; (3) detecting the effluent of the step (2), and stopping the advanced oxidation treatment, if the COD concentration is not greater than 50 mg / L and the TOC concentration is not more than 20 mg / L; if not, carrying out a further advanced oxidation treatment. The method has the advantages that the actual water quality is taken into account, the oxidation reaction efficiency is maximized, the medicaments are effectively saved at the same time, and the operation cost is reduced therefore.

Description

technical field [0001] The invention belongs to the field of waste water treatment, and in particular relates to a waste water treatment control method for promoting advanced oxidation effects. Background technique [0002] At present, most industries (such as pharmaceuticals, chemicals, petrochemicals, electroplating, pesticides, etc.) will contain organic matter in the sewage discharged. The allowable emission concentration of COD is 50mg / L; GB8978-1996 "Integrated Wastewater Discharge Standard" stipulates that the maximum emission concentration of TOC is 20mg / L. For sewage in many fields, there are some pollutants that are difficult to degrade and treat. Generally, after traditional treatment, the secondary effluent of the sewage (the highest concentration of COD in the sewage discharged from the secondary discharge can reach 100mg / L; TOC The highest concentration is also much higher than 20mg / L) may still fail to reach the discharge standard, therefore, it is necessary ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F101/20C02F101/30
CPCC02F1/56C02F1/722C02F1/725C02F1/78C02F2101/20C02F2101/30
Inventor 张炜铭贾如雪单超潘丙才吕路
Owner NANJING UNIV
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