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Constructed wetland-plasma coupling system and efficient wastewater treatment method

A constructed wetland system and plasma technology, which is applied in the field of plasma coupling system and high-efficiency wastewater treatment, can solve the problems of poor degradation effect, enhanced toxicity, and long branch chain of constructed wetland, and achieve good sewage treatment effect, good stability, The effect of low energy consumption

Pending Publication Date: 2022-03-04
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the types of organic micro-pollutants gradually increase, the toxicity increases, and the branch chains of macromolecular organic micro-pollutants are longer, resulting in poor degradation effect of constructed wetlands.

Method used

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  • Constructed wetland-plasma coupling system and efficient wastewater treatment method
  • Constructed wetland-plasma coupling system and efficient wastewater treatment method
  • Constructed wetland-plasma coupling system and efficient wastewater treatment method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Such as figure 1 As shown, a discharge plasma coupled constructed wetland system for synchronous removal of nitrogen, phosphorus and organic micro-pollutants in wastewater, including a power control box 1, an ozone detector 2, a digital oscilloscope 3, a plasma discharge battery 5 and a constructed wetland system 17 The dielectric barrier plasma reaction electrode high-voltage electrode 9 is connected to the power control box 1 and the digital oscilloscope 3, and the dielectric barrier plasma reaction electrode air inlet 10 is connected to the gas flow meter 11 and the blower 12, and the ozone detector 2 It is connected with the air outlet 6 of the plasma discharge cell 5, the submersible pump 13 in the plasma discharge cell 5 is connected with the submersible pump water diversion pipe 14 and the constructed wetland water distribution pipe 15, and the constructed wetland system 17 includes wetlands from top to bottom Plant 20, surface matrix 21, filler layer 22 and supp...

Embodiment 2

[0054] A kind of process that adopts the system in embodiment 1 to carry out nitrogen phosphorus and organic micro-pollutant sewage treatment:

[0055] Before the sewage to be treated enters the plasma discharge battery, turn on the blower to keep the plasma discharge battery in a continuous ventilation state. After the reactor is dry, inject the sewage into the plasma discharge battery, adjust the air flow meter, and set the flow rate to 160L min -1 , turn on the power, select AC voltage 24kV, and apply high voltage treatment. During the treatment process, the voltage, current and ozone concentration generated during the discharge process can be monitored synchronously. The treatment time is 20 minutes, and then all the sewage is passed into the constructed wetland system. New sewage is injected into the plasma discharge battery to start a new round of treatment until the sewage treatment capacity of the artificial wetland is reached, and the plasma discharge battery stops wor...

Embodiment 3

[0058] A kind of process that adopts the system in embodiment 1 to carry out nitrogen phosphorus and organic micro-pollutant sewage treatment:

[0059] Before the sewage to be treated enters the plasma discharge battery, turn on the blower to keep the plasma discharge battery in a continuous ventilation state. After the reactor is dry, inject the sewage into the plasma discharge battery, adjust the air flow meter, and set the flow rate to 120L min -1 , turn on the power, select the AC voltage of 16kV, and apply high voltage treatment. During the treatment process, the voltage, current and ozone concentration generated during the discharge process can be monitored synchronously. The treatment time is 15 minutes, and then all the sewage is passed into the constructed wetland system. New sewage is injected into the plasma discharge battery to start a new round of treatment until the sewage treatment capacity of the artificial wetland is reached, and the plasma discharge battery st...

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Abstract

The invention relates to a constructed wetland-plasma coupling system and a high-efficiency wastewater treatment method, is suitable for a deep treatment technology of nitrogen, phosphorus and organic polluted wastewater, and belongs to the field of water pollution control. The plasma discharge battery is suitable for an advanced treatment area of a sewage treatment plant, sewage flows through the plasma discharge battery, and macromolecular organic matters are mineralized into micromolecular matters by plasmas. The treated sewage flows into a wetland surface layer water distribution pipe through a water outlet of the plasma discharge battery so as to be uniformly distributed in a wetland system, small molecular organic matters are easy to biodegrade, and a carbon source is provided for the denitrification process, so that the nitrogen and phosphorus removal effect is improved. According to the invention, a discharge plasma technology and an artificial wetland technology are combined, macromolecular organic matters which are difficult to degrade in sewage are mineralized into micromolecular matters through plasmas, the biodegradability of organic micropollutants is improved, the removal of nitrogen in the artificial wetland is promoted, the sewage purification efficiency is effectively improved, and meanwhile, the blockage of a wetland system can be delayed.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to an artificial wetland-plasma coupling system and a high-efficiency wastewater treatment method. Background technique [0002] The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and is not necessarily taken as an acknowledgment or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. [0003] With the rapid development of the chemical industry and the continuous accumulation and superposition, artificially synthesized organic substances, such as synthetic dyes, pesticides, organic pesticides, plastic products, etc., are gradually accumulating in the environment while bringing convenience to people's lives. Although these chemicals are detected in low levels in the environment, they are refractory and persistent, ...

Claims

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Application Information

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IPC IPC(8): C02F9/14
CPCC02F1/72C02F1/48C02F3/32C02F7/00C02F2305/02
Inventor 吴海明赵欣张建胡振梁爽谢慧君
Owner SHANDONG UNIV
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