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A microwave-enhanced micro-electrolysis combined oxidation method for treating rubber additive wastewater

A technology of rubber additives and oxidation treatment, applied in chemical instruments and methods, multi-stage water treatment, water/sewage treatment, etc., can solve the problems of heavy economic burden, high cost per ton of water, high energy consumption, etc., and achieve investment and operation The effect of low cost, reduced speculation, and increased removal rate

Active Publication Date: 2016-01-20
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this process requires high investment and high energy consumption, and the cost per ton of water can be as high as several hundred yuan, causing a heavy economic burden to wastewater treatment enterprises. Many enterprises are facing the situation of restricting production due to the high cost of "three wastes" treatment

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  • A microwave-enhanced micro-electrolysis combined oxidation method for treating rubber additive wastewater

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Effect test

Embodiment 1

[0048] The COD of a certain rubber additive wastewater is 7500 mg / L, pH: 8.5. First carry out acidification reaction treatment, add sulfuric acid to adjust pH: 3.0, and react for 5 minutes. At this time, the COD of the acidified rubber additive wastewater is 7300mg / L; the acidified wastewater is added with hydrogen peroxide 7300mg in a ratio of 1:1 of hydrogen peroxide and wastewater. / L, reaction for 30 minutes, pH: 3.0, COD of the oxidized rubber auxiliaries wastewater: 7000mg / L, pH: 3.0; the oxidized wastewater enters the micro-electrolysis reactor for reaction, and the gas-water ratio is 20:1. Air, the reaction time is 120 minutes, the COD of the rubber auxiliaries wastewater after the micro-electrolysis reaction is 4500mg / L, pH: 5.5; the rubber auxiliaries mixed wastewater after the micro-electrolysis reaction enters the microwave reactor for reaction, and the microwave power is 600W. Time 10 minutes, the pH of the rubber auxiliary wastewater after microwave reaction: 5.5...

Embodiment 2

[0050] The COD of a certain rubber additive wastewater is 6500mg / L, pH: 8.5. First carry out acidification reaction treatment, add sulfuric acid to adjust pH: 3.0, and react for 5 minutes. At this time, the COD of the acidified rubber additive wastewater is 6300mg / L; the acidified wastewater is added with hydrogen peroxide at a ratio of 1:1 to 6300mg of hydrogen peroxide. / L, react for 30 minutes, pH: 3.0, COD of the oxidized rubber auxiliaries wastewater is 6000mg / L, pH: 3.0; the oxidized wastewater enters the micro-electrolysis reactor for reaction, and the gas-water ratio is 15:1. Air, the reaction time is 70 minutes, the COD of the rubber auxiliaries wastewater after the micro-electrolysis reaction is 4500mg / L, pH: 5.5; the rubber auxiliaries mixed wastewater after the micro-electrolysis reaction enters the microwave reactor for reaction, the microwave power is 500W, and the treatment Time 10 minutes, the pH of the rubber auxiliary wastewater after microwave reaction: 5.5,...

Embodiment 3

[0052] A method for treating rubber auxiliary waste water by utilizing microwave-enhanced micro-electrolysis combined oxidation treatment of a certain rubber auxiliary waste water of the present invention is adopted. The COD of a certain rubber additive wastewater is 6000mg / L, pH: 8.0. First carry out acidification reaction treatment, add sulfuric acid to adjust pH: 3.0, and react for 5 minutes. At this time, the COD of the acidified rubber auxiliaries wastewater is 5800 mg / L; the acidified wastewater is added with 5800 mg of hydrogen peroxide at a ratio of 1:1 to the wastewater. / L, react for 30 minutes, pH: 3.0, COD of the oxidized rubber auxiliaries wastewater is 5500mg / L, pH: 3.0; the oxidized wastewater enters the micro-electrolysis reactor for reaction, and the gas-water ratio is 15:1. Air, the reaction time is 100 minutes, the COD of the rubber auxiliaries wastewater after the micro-electrolysis reaction is 3500mg / L, pH: 5.5; the rubber auxiliaries mixed wastewater afte...

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Abstract

The invention provides a method for treating rubber chemical wastewater by microwave enhanced microelectrolysis combined oxidation. The method is characterized by comprising the following steps: pre-oxidizing wastewater, and carrying out microelectrolysis treatment; carrying out microwave radiation after organic matters in rubber chemical wastewater are subjected to ring-opening and chain.-scission; enhancing the treatment effect of microelectrolysis and oxidation by utilizing the electromagnetic effect of microwave, and quickly heating the wastewater by means of the heat effect of microwave. According to the method, the oxidation speed can be accelerated by means of temperature rising, so that separation of organic matters can be favored, a subsequent flocculation reaction is accelerated, and the total amount of sludge of wastewater can be reduced; and multiple processes are gradually combined for rubber chemical wastewater treatment, so that discharge of the wastewater with standard level at relatively low cost can be realized.

Description

technical field [0001] The invention belongs to the field of wastewater treatment, and relates to a method for microwave-enhanced micro-electrolysis combined oxidation treatment of rubber auxiliary wastewater, and the treated effluent reaches the national third-level standard for comprehensive sewage discharge. Background technique [0002] Rubber accelerator wastewater is a high-concentration refractory organic wastewater that contains various accelerators and raw materials such as aniline, xylene, cyclohexylamine and morpholine in the production process. The composition of wastewater is complex and difficult to control. [0003] Since rubber additive wastewater belongs to high-salt organic wastewater, distillation is the main treatment for this kind of wastewater at this stage. Biochemical and other treatment processes will be discharged up to the standard after treatment. However, this process has high investment and high energy consumption, and the cost per ton of wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08
CPCC02F1/302C02F1/461C02F1/66C02F1/722C02F9/00C02F2101/30C02F2103/36C02F2301/08
Inventor 霍莹杨勇付连超郑贝贝张莹
Owner CNOOC TIANJIN CHEM RES & DESIGN INST
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