Multi-stage membrane distillation treating method for ammonia nitrogen wastewater

A technology of ammonia nitrogen wastewater and membrane distillation, applied in water/sewage multi-stage treatment, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of high treatment cost, high temperature of wastewater, etc. Small, effective, fast-absorbing effect

Active Publication Date: 2013-07-24
江苏汇龙水务集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention provides a method for treating ammonia nitrogen wastewater by multistage membrane distillation in order to solve the technical problem that the existing method for treating ammonia nitrogen wastewater causes the wastewater to have a higher temperature and lead to high treatment costs.

Method used

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  • Multi-stage membrane distillation treating method for ammonia nitrogen wastewater
  • Multi-stage membrane distillation treating method for ammonia nitrogen wastewater

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specific Embodiment approach 1

[0023] Specific embodiment one: the method for treating ammonia nitrogen wastewater by multi-stage membrane distillation in this embodiment is carried out according to the following steps:

[0024] 1. Adjust the pH value of the ammonia nitrogen wastewater in the primary raw water pool 6-1 to 11-12;

[0025] 2. Pass the ammonia nitrogen wastewater in the primary raw water pool 6-1 treated in step 1 through the raw water inlet 5 of the primary membrane distillation module 1-1 by the primary raw water pump 8-1 at a flow rate of 500L / h~1000L / h -1 enters the first-level membrane distillation component 1-1, and the water is discharged from the raw water outlet 2-1 of the first-level membrane distillation component 1-1. -2;

[0026] 3. Adjust the pH value of the ammonia nitrogen wastewater in the secondary raw water pool 6-2 to 11-12;

[0027] 4. Pass the ammonia nitrogen wastewater in the secondary raw water pool 6-2 treated in step 3 through the raw water inlet 5 of the secondary...

specific Embodiment approach 2

[0037] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the pH value of the ammonia nitrogen wastewater in the raw water pool (6-1) is adjusted to 11.5 in step 1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0038] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the mass concentration of the acid solution described in step 9 is 3%. Others are the same as in the first embodiment.

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Abstract

The invention discloses a multi-stage membrane distillation treating method for ammonia nitrogen wastewater, relates to a method for treating ammonia nitrogen wastewater and solves the technical problem that the treatment cost is high caused by a high temperature of the wastewater in terms of existing methods for treating ammonia nitrogen wastewater. The method includes (1) adjusting the potential of hydrogen (pH) value of the ammonia nitrogen wastewater in a raw water tank, and then enabling raw water to pass through a first-stage membrane distillation component, a second-stage membrane distillation component, an n-1-stage membrane distillation component and an n-stage membrane distillation component; and (2) enabling an acid solution in a absorption liquid pool to pass through the n-stage membrane distillation component, the n-1-stage membrane distillation component, the second-stage membrane distillation component and the first-stage membrane distillation component while the step (1) is in operation. The multi-stage membrane distillation treating method for the ammonia nitrogen wastewater has the advantages that when the method is used for treating the ammonia nitrogen wastewater with a high concentration, the mass transfer velocity is high, the treatment efficiency is high, the temperature is not required to be increased, the method has a good application prospect, the membrane distillation process uses a hydrophobic membrane material, and the raw water and absorption liquids flow through two sides of the membrane respectively.

Description

technical field [0001] The invention relates to a method for treating ammonia nitrogen wastewater. Background technique [0002] The treatment of high-concentration ammonia-nitrogen wastewater is a hot issue in the field of water treatment. It is difficult to treat high-concentration ammonia-nitrogen wastewater by conventional wastewater biological treatment processes. Physicochemical methods such as air stripping are often used, but the treatment efficiency is limited and the wastewater is required to have a high At the same time, a large gas-water ratio is adopted, and the treatment cost is relatively high. Contents of the invention [0003] The present invention provides a method for treating ammonia nitrogen wastewater by multistage membrane distillation in order to solve the technical problem that the existing method for treating ammonia nitrogen wastewater causes the wastewater to have a relatively high temperature, resulting in high treatment costs. [0004] The me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F101/16
Inventor 马军刘乾亮赵雷刘惠玲
Owner 江苏汇龙水务集团有限公司
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