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A method for rapid removal of ammonia nitrogen from urban sewage plant effluent by electrochemically coupled zeolite adsorption

An urban sewage and electrochemical technology, applied in electrochemical water/sewage treatment, adsorbed water/sewage treatment, etc., can solve the problems of high cost, secondary pollution, complicated ammonia nitrogen operation and operation, achieve good running time and save electricity , the effect of reducing costs

Inactive Publication Date: 2014-10-29
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of complex operation, high cost and secondary pollution in the advanced treatment of ammonia nitrogen, and provide a method for quickly removing ammonia nitrogen from urban sewage plant effluent by electrochemical coupling zeolite adsorption

Method used

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  • A method for rapid removal of ammonia nitrogen from urban sewage plant effluent by electrochemically coupled zeolite adsorption
  • A method for rapid removal of ammonia nitrogen from urban sewage plant effluent by electrochemically coupled zeolite adsorption

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specific Embodiment approach 1

[0018] Specific implementation mode one: combine figure 1 As shown, the method for quickly removing ammonia nitrogen from the effluent of urban sewage plants by electrochemically coupling zeolite adsorption in this embodiment is carried out in the following steps:

[0019] 1. The effluent from the urban sewage treatment plant is collected and enters the storage tank 1;

[0020] 2. The effluent water from the storage tank 1 enters the coupled electrochemical reactor 3 filled with zeolite 4 through the peristaltic pump 2, starts the power supply 5, and enters the water from the bottom to the top, and enters from the cathode side, and overflows from the anode side. Ensure maximum contact between ammonia nitrogen and zeolite and plate;

[0021] 3. Cl in the effluent water in the coupled electrochemical reactor 3 - Oxidized by electrons generated by the anode to Cl 2 , the generated Cl 2 Contact with aqueous solution to generate HOCl or OCl - , HOCl or OCl - As a strong oxida...

specific Embodiment approach 2

[0029] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the electrode anode coupled to the electrochemical reactor 3 in step 2 is coated with RuO on the surface. 2 , IrO 2 and SnO 2 The multi-metal composite Ti electrode, the electrode cathode is a Ti mesh. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0030] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the circulation flow in the coupling electrochemical reactor 3 in step two is 100mL / min, and the electrochemical current density is 3mA / cm 2 , The hydraulic retention time is 30min. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a deep treatment method of ammonia nitrogen in water discharged from the municipal sewage plant and discloses a method for quickly removing ammonia nitrogen out of water discharged from a municipal sewage plant by means of electrochemical coupling zeolite absorption, in order to solve the problems of the existing ammonia nitrogen deep treatment, such as complicated operation, high cost and secondary pollution. The method disclosed by the invention comprises the following steps of: 1 collecting water discharged from the municipal sewage plant and feeding the effluent water into a water storage tank; 2 pumping the water discharged from the water storage tank by a peristaltic pump into a coupling electrochemical reactor fully filled with zeolite so that the water can be treated in the coupling electrochemical reactor; and 3 converting ammonia nitrogen into nitrogen in the coupling electrochemical reactor so as to remove a water solution and ammonia nitrogen on the zeolite. The discharged water treated by using the method can reach emission standard (GB18918-2002) of the national municipal sewage treatment plant level A. The method is easy and feasible to operate, the device is flexible and changeable, and can be used for oxidizing ammonia nitrogen into nitrogen in a short time, and secondary pollution and temperature change influence are avoided, electrolyte does not need to be added exactly, and zeolite in the reactor does not need to be regenerated, so that the method is low in cost.

Description

technical field [0001] The invention relates to a method for advanced treatment of ammonia nitrogen in effluent of urban sewage plants. Background technique [0002] At present, the most common sewage denitrification technology in urban sewage treatment plants is biological method, that is, through a series of actions of microorganisms such as ammonifying bacteria, nitrifying bacteria and denitrifying bacteria, the dissolved nitrogen in water is finally converted into nitrogen gas, thereby realizing Biological removal of nitrogen. In order to reduce the nutrient burden of receiving water bodies, the state stipulates that all urban sewage treatment plants need to be upgraded from the previous secondary standard to primary A or B. If the existing biological method is properly controlled, it can To achieve the first-class B standard of sewage effluent, but if only biological treatment is used, it is generally difficult to reach the first-class A standard. The national standar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/46C02F1/28
Inventor 丁晶赵庆良陈扬王琨李伟孟繁宇徐勋
Owner HARBIN INST OF TECH