Nitrogen-containing organic wastewater electrochemical treatment reactor and method for enabling electroflocculation sludge to achieve magnetic separation performance

A technology of electrocoagulation and magnetic separation, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage multi-stage treatment, etc., can solve problems such as difficult maintenance and high operating costs, and achieve improved treatment efficiency, The effect of speeding up the separation time and facilitating the separation

Pending Publication Date: 2019-06-21
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Unfortunately, the use of additional chemicals will inevitably lead to maintenance difficulties and high operating costs as well as the risk of secondary pollution

Method used

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  • Nitrogen-containing organic wastewater electrochemical treatment reactor and method for enabling electroflocculation sludge to achieve magnetic separation performance
  • Nitrogen-containing organic wastewater electrochemical treatment reactor and method for enabling electroflocculation sludge to achieve magnetic separation performance

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Effect test

Embodiment 1

[0034] As shown in the accompanying drawings of the description, a nitrogen-containing organic wastewater electrochemical treatment reverse device that enables electro-flocculation sludge to obtain magnetic separation performance. When the power is turned on, the two anodes of the electrochemical system work in the order of iron anode→Ti / RuO 2 Anode→Iron anode→Ti / RuO 2 Anode→Iron anode→Ti / RuO 2 Anode → iron anode. Anode alternation time is 20min, electrolysis is 140min, current density is 100mA / cm 2 , take samples to test the treatment effect.

[0035] Under the above conditions, the biochemical effluent of landfill leachate is selected as the experimental object (because it has all the characteristics of nitrogen-containing organic wastewater), after the sewage is treated by the reactor of the present invention, the effluent COD removal rate is 75.5%, and the TN removal rate is 94.9% %.

Embodiment 2

[0037] The reactor is set up as in Example 1, with the actual landfill leachate biochemical effluent as the experimental object (because it has all the characteristics of nitrogen-containing organic wastewater), after the sewage is treated by the reactor of the present invention, the main stability obtained under the iron anode condition Crystal form is Fe 3 o 4 , in Ti / RuO 2 The stable crystal form obtained under anodic conditions is γ-Fe 2 o 3 , after 140min of reaction, magnetic separation was carried out on the precipitate, and the separation time was 24s through a 1T magnetic field.

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Abstract

The invention discloses a nitrogen-containing organic wastewater electrochemical treatment reactor and a method for enabling electroflocculation sludge to achieve a magnetic separation performance. Onthe basis that the method removes a pollutant in the nitrogen-containing organic wastewater at the same time, a strongly magnetic iron compound is formed in the traditional electroflocculation sludge, so that the electroflocculation sludge achieves the magnetic performance. The core of the method is to introduce two anodes, one is an iron anode, the other is a Ti/RuO2 anode, the iron anode and the Ti/RuO2 anode work alternatively to create a transient-state oxidation-deoxidation environment for a system, and the accumulation of the strongly magnetic Fe3O4 and gamma-Fe2O3 is promoted. Based onthe method, the invention further provides the electrochemical reactor, the electrochemical reactor is widely suitable for removing total nitrogen and COD (Chemical Oxygen Demand) in the treatment ofthe nitrogen-containing organic wastewater (like domestic wastewater, industrial wastewater, landfill leachate and the like) containing an electroflocculation treatment unit, meanwhile, the electroflocculation sludge becomes magnetic, and the rapid magnetic separation of the sludge is achieved.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method and a reactor for treating nitrogen-containing organic wastewater. Background technique [0002] Nitrogen-containing organic wastewater is a common wastewater derived from domestic sewage, aquaculture wastewater, toilet drainage and landfill leachate. The direct discharge of nitrogen-containing organic wastewater will induce regional ecological and environmental problems and endanger human health. It has been confirmed that electrochemical technology is suitable for the treatment of nitrogen-containing organic wastewater due to its high efficiency, stability and environmental adaptability. However, there are two important difficulties in the electrochemical treatment of nitrogen-containing organic wastewater. First, although the available chlorine produced by electrochemical oxidation is beneficial to the removal of COD and ammonia nitrogen, it will inhibit th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/12C02F101/16
Inventor 陈男邓阳冯传平
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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