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Multi-component composite catalytic zero-valent iron Fenton treatment method and device for industrial wastewater

A technology for industrial wastewater and treatment methods, which is applied in the fields of water/sewage multi-stage treatment, water/sewage treatment, chemical instruments and methods, etc. The effect of reducing the output, reducing the amount and cost of acid and alkali, and convenient assembly

Active Publication Date: 2016-05-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the conventional zero-valent iron Fenton has the problem of adjusting the pH of the influent to a relatively low level of 3-4, resulting in high acid and alkali dosing costs and a large amount of iron sludge.

Method used

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  • Multi-component composite catalytic zero-valent iron Fenton treatment method and device for industrial wastewater

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Effect test

Embodiment 1

[0028] The COD of the secondary biochemical effluent of a textile printing and dyeing industrial park is 120-140mg / L, which needs to be further treated to meet the first-level B standard (COD≤60.0mg / L) of the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" (GB18918-2002) ). Add acid and H to wastewater 2 o 2 , adjust the pH to 5.0 and then enter the Fenton reaction pool, and fill the reaction pool with a multi-component combination catalytic filler composed of iron-nickel alloy grains, iron-copper alloy grains, manganese sand, zeolite, and hematite (iron-nickel alloy grains, iron-copper alloy grains, iron-copper alloy grains, The weight ratio of alloy particles, ferromanganese alloy particles, zeolite and hematite is 5:5:1:1:1), and the residence time in the Fenton reaction tank is 4.0h; then add alkali and PAM coagulant to react After the pH of the effluent is adjusted to 7.8, it enters the coagulation sedimentation tank. After the wastewater is treated, t...

Embodiment 2

[0032] The COD of the secondary biochemical effluent of a textile printing and dyeing industrial park is 60-80mg / L, which needs to be further treated after the "Discharge Standard of Pollutants for Urban Sewage Treatment Plants" (GB18918-2002) Class A Standard (COD≤50.0mg / L) . Add acid and H to wastewater 2 o 2 , adjust the pH to 4.8 and then enter into the Fenton reaction pool. The reaction pool is filled with multiple combination catalytic fillers composed of iron-nickel alloy grains, iron-copper alloy grains, manganese sand, zeolite, and hematite (iron-nickel alloy grains, iron-copper alloy grains, and iron-copper alloy grains. The weight ratio of alloy particles, ferromanganese alloy particles, zeolite and hematite is 5:5:1:1:1), and the residence time in the Fenton reaction tank is 3.0h, and then adding alkali and PAM coagulant to react After the pH of the effluent is adjusted to 8.0, it enters the coagulation sedimentation tank. After the wastewater is treated, the COD...

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Abstract

The invention relates to a multi-component composite catalytic zero-valent iron Fenton treatment method and device for industrial wastewater. The method comprises the following steps: adding an acid and H2O2 into the industrial wastewater to adjust the pH value to be 4.5-6.0, and allowing the industrial wastewater of which the pH value is adjusted to enter a Fenton-like reaction tank, wherein the Fenton-like reaction tank is filled with a multi-component composite catalytic filling pack which comprises iron-nickel alloy particles, iron-copper alloy particles, manganese-iron alloy particles, zeolite and hematite; after a 3.0-4.0 hours' reaction of the wastewater in the Fenton-like reaction tank, adding an alkali to adjust the pH value to be 7.8-8.0, adding a coagulant aid, allowing the mixture to enter a coagulating-sedimentation integrated tank, discharging water after finishing solid-liquid separation, and performing efflux disposal on iron-containing sludge. The method and the device have the advantages that raw materials are easy to obtain, the assembly is convenient and the cost is low.

Description

technical field [0001] The invention belongs to the field of industrial wastewater treatment methods, and in particular relates to a multi-component combination catalytic zero-valent iron-like Fenton treatment method and a device for industrial wastewater. Background technique [0002] With the increasing requirements of the country for energy conservation and emission reduction, the discharge standards of industrial wastewater have generally increased. There are many kinds of industrial wastewater, the water quality is complex, and there are many refractory substances. It is difficult to meet the high standard discharge requirements by conventional physicochemical and biological combination processes. Fenton oxidation is an advanced oxidation process based on OH. In theory, it can non-selectively oxidize most of the organic matter in wastewater, so it has been widely used in the field of industrial wastewater treatment. [0003] The zero-valent iron-like Fenton process is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
CPCC02F1/56C02F1/66C02F1/722C02F1/725C02F9/00C02F2305/026
Inventor 薛罡张文启陈红李响高品张禾刘振鸿张凡张文娟王成薛顺利韩闯魏欣孟迪顾超超陈畅愉成钰莹来思周甘雁飞徐小强杨帆
Owner DONGHUA UNIV
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