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Method for treating rubber chemical wastewater by microwave enhanced microelectrolysis combined oxidation

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 investment, etc., and achieve investment and operation The effect of low cost, reduced speculation, and increased removal rate

Active Publication Date: 2015-01-21
CNOOC TIANJIN CHEM RES & DESIGN INST +1
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  • 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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  • Method for treating rubber chemical wastewater by microwave enhanced microelectrolysis combined oxidation

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Experimental program
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Effect test

Embodiment 1

[0048] COD7500mg / L, pH: 8.5 of a rubber auxiliary wastewater. First carry out acidification reaction treatment, add sulfuric acid to adjust the pH: 3.0, and react for 5 minutes. At this time, the COD of the rubber additive wastewater after acidification is 7300mg / L; mg / L, reacted for 30 minutes, pH: 3.0, the COD of the oxidized rubber additive wastewater is 7000 mg / L, pH: 3.0; the oxidized wastewater enters the micro-electrolysis reactor for reaction, and the gas-water ratio is 20:1 Air is introduced, the reaction time is 120 minutes, the COD of the rubber additive wastewater after the micro-electrolysis reaction is 4500 mg / L, pH: 5.5; the rubber additive mixed wastewater after the micro-electrolysis reaction enters the microwave reactor for reaction, and the microwave power 600W, the treatment time is 10 minutes, the pH of the rubber additive wastewater after microwave reaction: 5.5, COD3000 mg / L; the rubber additive wastewater after microwave reaction enters the neutralizati...

Embodiment 2

[0050] COD6500mg / L, pH: 8.5 of a rubber additive wastewater. First carry out acidification reaction treatment, add sulfuric acid to adjust the pH: 3.0, and react for 5 minutes. At this time, the COD6300mg / L of the rubber additive wastewater after acidification; add hydrogen peroxide 6300 into the wastewater after acidification according to the ratio of hydrogen peroxide to wastewater 1:1 mg / L, reacted for 30 minutes, pH: 3.0, COD6000 mg / L of the oxidized rubber additive wastewater, pH: 3.0; the oxidized wastewater enters the micro-electrolysis reactor for reaction, according to the gas-water ratio of 15:1 Air is introduced, the reaction time is 70 minutes, the COD of the rubber additive wastewater after the micro-electrolysis reaction is 4500mg / L, pH: 5.5; the rubber additive mixed wastewater after the micro-electrolysis reaction enters the microwave reactor for reaction, and the microwave power is 500W , the treatment time is 10 minutes, the pH of the rubber additive wastewat...

Embodiment 3

[0052] A certain rubber additive wastewater is treated with a method of the present invention that uses microwave-enhanced micro-electrolysis combined oxidation to treat rubber additive wastewater. COD6000mg / L, pH: 8.0 of a rubber additive wastewater. First, carry out acidification reaction treatment, add sulfuric acid to adjust the pH: 3.0, and react for 5 minutes. At this time, the COD of the rubber additive wastewater after acidification is 5800mg / L; the ratio of hydrogen peroxide to wastewater after acidification is 1:1, add hydrogen peroxide 5800mg / L, reacted for 30 minutes, pH: 3.0, COD5500mg / L of the oxidized rubber additive wastewater, 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, COD3500mg / L, pH: 5.5 of the waste water of rubber additives after the micro-electrolysis reaction; the mixed waste water of rubber additives after the micro-electrolysis reaction en...

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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 waste water treatment, and relates to a microwave-enhanced micro-electrolysis combined oxidation method for treating waste water of rubber additives, and the treated effluent meets the third-level national sewage comprehensive discharge standard. Background technique [0002] Rubber accelerator wastewater belongs to high-concentration refractory organic wastewater, which 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 treat. [0003] Since rubber additive wastewater belongs to high-salt organic wastewater, distillation treatment is mainly used for this type of wastewater treatment at this stage. The salt and most of the non-degradable organic matter after distillation of wastewater remain in the solid phase, and the distilled liquid is then oxidized or Biochemical and other t...

Claims

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Application Information

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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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