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Method for treating high-concentration refractory organic wastewater by using microwave induced oxidation

A technology for oxidation treatment and organic wastewater, applied in the field of water treatment, can solve the problems such as the difficulty of large-scale popularization and application of microwave-induced oxidation technology, the stay of microwave-induced oxidation technology in experimental research, and the high energy consumption of water treatment, so as to achieve easy implementation and maintenance. , The effect of good operation and low investment cost

Active Publication Date: 2013-12-25
GUANGDONG ENG TECH INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, the research on microwave-induced oxidation technology is still in the stage of experimental research and exploration of simulated wastewater with a single pollutant, and relevant engineering cases are rarely reported.
There is a lack of supporting equipment that can make the microwave-induced oxidation technology continue, and the development of low-loss, long-life, economical and efficient oxidants has not yet been researched. Water treatment consumes a lot of energy and costs high, which makes it difficult to promote microwave-induced oxidation technology on a large scale. Reason for application

Method used

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  • Method for treating high-concentration refractory organic wastewater by using microwave induced oxidation
  • Method for treating high-concentration refractory organic wastewater by using microwave induced oxidation
  • Method for treating high-concentration refractory organic wastewater by using microwave induced oxidation

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The wastewater produced by a biopharmaceutical company in Zhaoqing is black and opaque, with a chroma of 1250 times and no impurities. The content of COD is as high as 11000 mg / l, ammonia nitrogen is 80.5 mg / l, total nitrogen is 185.5 mg / l, and BOD2 SO 4 Condition pH<4.0, add oxidant at a ratio of 1.5g / l, enter the pre-reaction tank for 15 minutes, and the effluent enters the microwave-induced oxidation reactor through the pump, under the microwave power of 5.5 kw / ton of water, the reaction temperature is 40°C, and the flow rate is 0.5t / h Under certain conditions, the wastewater flows through the box reactor from top to bottom, and the reaction time is 13 minutes. The effluent enters the air flotation tank for mud-water separation, and the sludge is calcined to recover 35% of the raw materials for oxidant production. The processing capacity of the reaction system is 0.8t / h. After 2 hours of stable operation, samples are taken for testing. Under the optimal process condi...

Embodiment 2

[0042] The wastewater produced by a fine chemical company in Zhongshan is black and has a pungent smell. The COD content is as high as 25,000 mg / l, BOD2 SO 4 Condition pH<4.0, add oxidant at a ratio of 2.5g / l, enter the pre-reaction tank for 15 minutes, and the effluent enters the microwave-induced oxidation reactor through the pump, at a microwave power of 9 kw / ton of water, a reaction temperature of 40°C, and a flow rate of 0.5t / h Under certain conditions, the wastewater flows through the tank reactor from top to bottom, and the reaction time is 15 minutes. After the reaction, the effluent enters the air flotation tank for mud-water separation, and the sludge is calcined to recover 28.3% of the raw materials for oxidant production. The processing capacity of the reaction system is 0.5t / h. After the system runs stably for 2 hours, samples are taken for testing. Under this process condition, the effluent COD removal rate is 97%, B / C is greater than 0.5, and indicators such as ...

Embodiment 3

[0044] The waste water produced by a leather company in Foshan is milky white with a pungent smell and the COD content is as high as 9500 mg / l. After the relevant process parameters are determined through small-scale experiments, pilot-scale treatment is carried out. First, join the H 2 SO 4 Condition pH<5.0, add oxidant at a ratio of 4.0g / l, enter the pre-reaction tank for 20 minutes, and the effluent enters the microwave-induced oxidation reactor through the pump, under the conditions of microwave power 6.0kw / ton water, reaction temperature 40℃, flow rate 0.5t / h Under certain conditions, the wastewater flows through the box reactor from top to bottom, and the reaction time is 15 minutes. After the reaction, the effluent enters the air flotation tank for mud-water separation, and the sludge is calcined to recover 30.5% of the raw materials for oxidant production. The processing capacity of the reaction system is 0.5t / h. After the system runs stably for 2 hours, samples are ...

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Abstract

The invention discloses a method for treating high-concentration refractory organic wastewater by using microwave induced oxidation, which is high in treatment efficiency, short in treatment time and low in running cost, occupies a small space, is safe and easy to implement and maintain. The method comprises the following steps of: firstly, adding a certain amount of sulfuric acid into high-concentration refractory organic wastewater to be treated, and adjusting the pH value of the wastewater to ensure that the wastewater is acidic; then, adding an oxidant capable of strongly absorbing microwaves into the wastewater after water quality adjustment, and performing aeration pre-reaction for 10 minutes, wherein the oxidant is a microwave response type material which is made from metal capable of absorbing the microwaves and the microwave response type material mainly contains one or more types of metals including iron, manganese, nickel and the like capable of absorbing the microwaves; then, putting the wastewater after pre-reaction treatment into a microwave oxidation reactor, and performing microwave induced oxidation reaction; then, putting the mixture after the microwave induced oxidation reaction into air floatation equipment, performing mud-water separation, and discharging after the outflowing water reach a standard; and finally, recycling the separated mud residues.

Description

technical field [0001] The invention relates to the field of water treatment, in particular to a method for treating high-concentration refractory organic wastewater by microwave-induced oxidation with high treatment efficiency, short treatment time, less land occupation, safety, easy implementation and maintenance, and low operating cost. Background technique [0002] With the continuous expansion of production scale and the rapid development of industrial technology, the number of pollution sources containing high-concentration organic wastewater is increasing, and the technical requirements for treating such wastewater are getting higher and higher. At present, there is still a lack of mature and effective treatment technologies, and the treatment costs are quite high. high. Therefore, due to technical and financial constraints, some enterprises did not take effective treatment measures in time, causing a large number of untreated or substandard refractory organic polluta...

Claims

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Application Information

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IPC IPC(8): C02F9/08C02F9/14
Inventor 陈大志谭艳来罗晓栋吴艳黄力彦姚创岳建雄赵卫星佘琼红胡小娇
Owner GUANGDONG ENG TECH INST
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