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MBR process for treating nitrate wastewater

A nitrate and process technology, applied in the field of water treatment, can solve the problems of denitrifying bacteria enrichment, incomplete denitrification, etc., and achieve the effects of strong practical value, improved nitrogen utilization rate, and strong impact resistance.

Pending Publication Date: 2021-08-17
知和环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method creates an anoxic environment by stirring, but the water still contains a high concentration of dissolved oxygen, which affects the enrichment of denitrifying bacteria and leads to incomplete denitrification

Method used

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  • MBR process for treating nitrate wastewater
  • MBR process for treating nitrate wastewater
  • MBR process for treating nitrate wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The adipic acid wastewater of a chemical plant is treated by using an MBR process for treating high-concentration nitrate wastewater of the present invention. The adjustment tank is a plastic drum with a diameter of 80 cm and a height of 1 m. The MBR reaction tank is a carbon steel cuboid with a height of 2 m, a length of 2 m, and a width of 1.2 m. The MBR hollow fiber membrane is placed inside the reactor, and the nitrogen blowing device is set at Next to the MBR reaction tank, it is transported to the bottom of the reaction tank through the aeration pipe. The nitrogen recovery device is installed on the top of the MBR reaction tank, and the purified nitrogen is collected and transported to the adjustment tank and the bottom of the MBR reaction tank through pipelines. On the one hand, its function is to let the sewage and nutrients The liquid is fully mixed, and on the other hand, the dissolved oxygen in the water in the adjustment tank and the MBR reaction tank is disc...

Embodiment 2

[0024] A kind of MBR process for treating high-concentration nitrate wastewater of the present invention is used to treat the production wastewater of a petrochemical enterprise. The left side is a regulating pool, which is a welded cuboid with a length of 1.5 m, a width of 1 m and a height of 1 m. The middle is a side length of 1.5 m. The MBR reaction pool is on the right, and the MBR outlet pool is on the right. The MBR membrane is installed inside the reactor, and the nitrogen blow-off device is installed on the right side of the MBR reaction tank to aerate the MBR reaction tank to remove dissolved oxygen. The nitrogen recovery device is installed on the left side of the MBR reaction tank, and the collected nitrogen is used to remove the regulating tank and MBR reaction dissolved oxygen in the pool. The filler filling rate is 1 / 5, the sludge concentration in the MBR reaction tank is 8500 mg / L, and the nitrate nitrogen concentration in the production wastewater is 700-1000mg...

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Abstract

The invention discloses an MBR process for treating nitrate wastewater, and relates to the technical field of sewage treatment. The process comprises a water inlet regulating tank, an MBR reaction tank and a clean water tank. A membrane bioreactor and the denitrification technology are combined for the first time, and the temperature, the pH value, the carbon-nitrogen ratio and the dissolved oxygen concentration are optimized, so that environmental factors are more suitable for growth and enrichment of denitrifying bacteria. A nitrogen stripping device is used for aeration, so that dissolved oxygen is reduced, substance mixing is enhanced, and functional activity of denitrifying bacteria is fully played; a good effect can be achieved in treatment of nitrate wastewater, especially high-concentration nitrate wastewater, the impact resistance is high, and a new thought is provided for high-concentration nitrate treatment. In addition, the membrane bioreactor for treating nitrate wastewater and the application method of the membrane bioreactor are simple to operate, small in occupied area and cost-saving, and particularly have higher practical value under the condition that site resources of a sewage plant are limited.

Description

technical field [0001] The invention belongs to the application field of water treatment technology, and specifically relates to an MBR process for treating nitrate wastewater. Perform deep removal. Background technique [0002] With the rapid development of social economy, the problem of environmental pollution is becoming more and more prominent. Traditional denitrification devices have high energy consumption, complicated operation, low processing load, low concentration of nitrate nitrogen, large floor area, small application range, and poor process flow. Long, complex operation process and other issues. Therefore, new denitrification equipment is urgently needed to solve the above problems. [0003] MBR is a new and efficient water treatment technology combining activated sludge method and membrane separation technology. It can realize the effective separation of hydraulic retention time (HRT) and sludge retention time (SRT), which is conducive to the enrichment of a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/12C02F3/30C02F7/00C02F101/16
CPCC02F3/1268C02F3/1278C02F3/305C02F2101/163Y02W10/10
Inventor 李海松阎登科邓军磊吴少松李丹杰洪健权
Owner 知和环保科技有限公司