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A treatment device for refractory wastewater and a wastewater treatment method thereof

A treatment device and wastewater treatment technology, applied in water/sludge/sewage treatment, water/sewage multi-stage treatment, chemical instruments and methods, etc., can solve the problems of complex treatment process and high energy consumption, and achieve accelerated chemical reactions, Effects of reduced energy consumption and shortened response time

Active Publication Date: 2017-01-04
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method uses a multi-stage wastewater deep oxidation treatment process, the treatment process is complicated, and the energy consumption is high.

Method used

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  • A treatment device for refractory wastewater and a wastewater treatment method thereof

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Effect test

Embodiment 1

[0029] Papermaking fluorescent whitening agent wastewater COD is 1161mg / L after biochemical treatment, adopts the method of the present invention to treat, wastewater treatment capacity is 100L / h, adjust wastewater pH with sulfuric acid to be 3.1, then add oxidant and Fe3 + catalyst, oxidant H2O2 ( Concentration 30%) dosing concentration is 1.4mL / L, Fe3+ catalyst dosing concentration is 0.85g / L, oxidant and Fe3+ catalyst molar ratio is 4:1. The waste water is pumped into the single-frequency opposite-shooting tube-type ultrasonic reactor with a corrugated inner wall, the ultrasonic frequency is 20KHz, the ultrasonic action intensity is 0.13 W / cm2, and the ultrasonic action time is 30S, and then enters the catalytic reaction pool, and the reaction time is 30min , the catalyzed reaction effluent is adjusted to pH 7.1 by adding alkali, and then enters the sedimentation tank for solid-liquid separation. The COD of the supernatant is 220mg / L, and the COD removal rate is 81.1%, reach...

Embodiment 2

[0031] Papermaking fluorescent whitening agent wastewater is biochemically treated with a COD of 1161mg / L, treated by the method of the present invention, the wastewater treatment capacity is 110L / h, the pH of the wastewater is adjusted to 3.5 with sulfuric acid, and then the oxidant and Fe are added 2+ Catalyst, Oxidant H 2 o 2 (Concentration 30%) Dosing concentration is 3.1mL / L, Fe 2+ Catalyst dosage concentration is 1.5g / L, oxidant and Fe 2+ The catalyst molar ratio was 5:1. The waste water is pumped into the single-frequency opposite-shooting tube-type ultrasonic reactor with a corrugated inner wall, the ultrasonic frequency is 25KHz, and the ultrasonic action intensity is 0.18 W / cm 2 , the ultrasonic action time is 25S, and then enters the catalytic reaction tank, the reaction time is 35min, the catalytic reaction effluent is adjusted to pH 7.5 by adding alkali, and then enters the sedimentation tank for solid-liquid separation. The supernatant COD is 160mg / L, and the CO...

Embodiment 3

[0033] Papermaking fluorescent whitening agent wastewater COD is 738mg / L after biochemical treatment, adopts the method of the present invention to handle, and wastewater treatment capacity is 100L / h, adjusts wastewater pH with sulfuric acid to be 2.5, then adds oxidant and catalyst, Mn 2+ Oxidant H 2 o 2 (Concentration 30%) Dosing concentration is 7mL / L, Mn 2+ Catalyst dosage concentration is 1.7g / L, oxidant and Mn 2+ The catalyst molar ratio was 10:1. The waste water is pumped into the single-frequency opposite-shooting tube-type ultrasonic reactor with a corrugated inner wall, the ultrasonic frequency is 15KHz, and the ultrasonic action intensity is 0.1 W / cm 2 , the ultrasonic action time is 10S, and then enters the catalytic reaction tank, the reaction time is 60min, the catalytic reaction effluent is adjusted to pH 7.0 by adding alkali, and then enters the sedimentation tank for solid-liquid separation. The supernatant COD is 146mg / L, and the COD removal rate was 80.2...

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Abstract

The invention provides a treatment device for degradation-resistant waste water and a waste water treatment method thereof, and belongs to the technical field of sewage treatment. The treatment device is characterized by comprising a pH (potential of hydrogen) adjusting tank (1), an ultrasonic reactor (3), a catalytic reaction tank (4) and a sedimentation tank (5) which are sequentially connected in series, wherein the ultrasonic reactor (3) is a single-frequency emission tube-type ultrasonic reactor, and the inner wall of the ultrasonic reactor (3) is corrugated. The device is used for achieving ultrasonic synergistic Fenton oxidization of the degradation-resistant waste water, and a Fenton reagent is added before ultrasonic treatment and then enters the ultrasonic reactor (3) to have a synergistic oxidization reaction. The corrugated inner wall of the single-frequency emission tube-type ultrasonic reactor (3) enables ultrasonic waves to be reflected and focused for multiple times, and accordingly, the multiple superposition of energy is achieved. The device and the method enable the reaction time of the ultrasonic waves to be short, the energy consumption is low, the reaction efficiency is improved, the amount of agents used for the method is reduced, the energy consumption of ultrasonic waves is low, and the device and the method can be conveniently used in industry.

Description

technical field [0001] A treatment device for refractory waste water and a waste water treatment method thereof belong to the technical field of sewage treatment, and specifically relate to a device for treating chemical waste water by physical and chemical methods using ultrasonic technology and advanced oxidation technology and a treatment method using the device. Background technique [0002] Industrial wastewater such as papermaking wastewater, pharmaceutical wastewater and other chemical wastewater contains a large amount of refractory organic pollutants, and it is difficult to meet the discharge standards with conventional biological treatment technologies. Usually, various advanced oxidation technologies are used to treat the biochemical effluent to make it meet the ideal discharge standard. Among them, Fenton reagent can effectively oxidize and remove refractory organic matter that cannot be removed by traditional wastewater treatment technology. It can not only oxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/08
Inventor 王建娜潘咸峰张方银李茂双苟社全
Owner CHINA PETROLEUM & CHEM CORP
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