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Process method for treating hardly-biodegradable organic wastewater

A technology of organic wastewater and process methods, applied in chemical instruments and methods, light water/sewage treatment, oxidized water/sewage treatment, etc., can solve the problem of incomplete treatment of refractory compounds, a large amount of iron-containing sludge, and discharge that cannot fully meet the standards and other issues, to achieve the effect of reducing the generation of chemical sludge, technical improvement, and efficient treatment

Active Publication Date: 2010-07-28
GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

However, a large amount of Fe is required in a single Fenton oxidation process 2+ The dosage is to maintain sufficient OH free radical generation, which will generate a large amount of iron-containing sludge during the treatment process, requiring additional separation and disposal
In addition, there are still some refractory compounds that are not completely treated, and cannot be discharged in full compliance

Method used

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  • Process method for treating hardly-biodegradable organic wastewater
  • Process method for treating hardly-biodegradable organic wastewater
  • Process method for treating hardly-biodegradable organic wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0051] The COD content of bagasse waste water after physical, chemical and biochemical treatment in the early stage is 2675ml / g. The waste water enters the ultrasonic cavitation process area first. At the bottom of the ultrasonic cavitation process area, an ultrasonic transmitter with a power of 1KW per 1 cubic meter of wastewater treatment volume is installed. The operating frequency is 20KHz. Through the action of the ultrasonic generator, an ultrasonic cavitation area is generated inside the reactor. During ultrasonic cavitation The cavitation process in the region can concentrate the energy of the sound field, and when the cavitation bubble collapses, the highly concentrated energy is released in a very small space in the liquid, forming a local high temperature greater than 5000K and a high pressure greater than 50MPa, and Extreme conditions such as strong shock waves and jets can effectively decompose organic macromolecular compounds into small molecules that are easy to...

Embodiment 2

[0056] The COD content of bagasse waste water after physical, chemical and biochemical treatment in the early stage is 2800ml / g. The waste water enters the ultrasonic cavitation process area first. At the bottom of the ultrasonic cavitation process area, an ultrasonic transmitter with a power of 1KW per 1 cubic meter of wastewater treatment volume is installed. The operating frequency is 80KHz. Through the action of the ultrasonic generator, an ultrasonic cavitation area is generated inside the reactor. During ultrasonic cavitation The cavitation process in the region can concentrate the energy of the sound field, and at the moment of the collapse of the cavitation bubble, the highly concentrated energy is released in a very small space in the liquid, forming a local high temperature greater than 5500°C and a high pressure greater than 55MPa. And extreme conditions such as strong shock waves and jets can effectively decompose organic macromolecular compounds into small molecul...

Embodiment 3

[0061] The COD content of the molasses wastewater from the sugar factory after physicochemical and biochemical treatment in the early stage is 4112ml / g.

[0062] Firstly, the waste water flows into the circulating electrochemical reaction zone. The cathode of the reaction zone is an electrolytic chamber surrounded by stainless steel plates, and the ratio of the perimeter to the height of each electrolytic chamber is 2:10; the anode is a cylindrical pure iron rod; the ratio of the working area of ​​the cathode to the anode is 8:3. In this reaction zone, Fe is produced by electrochemical means through the anode 3+ / Fe 2+ And convert dissolved oxygen into oxidant H by electrochemical method 2 o 2 It constitutes the components of Fenton reagent, and the current density is controlled at 17-20mA / cm 2 In the range of Fe 3+ / Fe 2+ The concentration is about 11mmol / L.

[0063] The electrochemically treated wastewater enters the ultrasonic cavitation process area. At the bottom ...

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Abstract

The invention relates to a process method for treating hardly-biodegradable organic wastewater, and the method comprises the following steps: mainly utilizing the combination of ultraviolet light, electrochemistry, ultrasonic waves and oxidation-reduction chemical reaction for treating the hardly-biodegradable organic wastewater, and treating the wastewater by three reaction units of an ultrasonic cavitation zone, an electrochemical reaction zone and an ultraviolet light catalytic reaction zone, thereby realizing the high-efficient multi-stage deep wastewater oxidation reaction which combines the ultrasonic wastewater treatment method, the ultrasonic light and the collaborative Fenton reagent oxidation wastewater treatment, as well as the electrochemistry and the collaborative Fenton reagent oxidation wastewater treatment, effectively treating a variety of types of hardly-biodegradable organic wastewater and leading the COD removal rate of the wastewater after the treatment to be more than 90%.

Description

technical field [0001] The invention relates to a method for treating organic wastewater, in particular to a process for treating biochemically refractory organic wastewater Background technique [0002] With the rapid development of industrial economy, the discharge of industrial wastewater is increasing faster and faster. Industrial wastewater is one of the major problems to be solved urgently in contemporary environmental work. With the continuous improvement of people's awareness of environmental protection, people have higher and higher requirements for the discharge of industrial wastewater, but the traditional wastewater treatment methods have been difficult to meet this requirement, and the discharged wastewater treated by traditional methods is difficult to meet the discharge requirements of the relevant new standards and "emission reduction" requirements. After some industrial wastewater (such as natural organic chemical process wastewater, pulp and paper industr...

Claims

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Application Information

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IPC IPC(8): C02F9/12C02F1/36C02F1/46C02F1/72C02F1/32C02F101/30
Inventor 宋海农陈国宁陈楠杨崎峰周永信王景龙
Owner GUANGXI BOSSCO ENVIRONMENTAL PROTECTION TECH
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