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A kind of treatment method of ammonia nitrogen wastewater

A technology for ammonia nitrogen wastewater and a treatment method, which is applied in the field of comprehensive environmental pollution control, can solve the problems of poor water quality adaptability, high operation cost, low treatment efficiency, etc., and achieves the effects of prolonging the regeneration period, wide application range, and reducing the amount of acid and alkali.

Inactive Publication Date: 2011-12-07
赛普(无锡)膜科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Many methods can remove ammonia nitrogen to a certain extent, such as physical methods include distillation and soil irrigation; chemical methods include ammonia stripping, chemical precipitation, breakpoint chlorination, electrodialysis, electrochemical treatment, catalytic cracking; biological methods include nitrification and Algae cultivation, but the above traditional methods have many disadvantages, such as low treatment efficiency, poor water quality adaptability, large investment, high operating cost, and secondary pollution, etc.

Method used

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  • A kind of treatment method of ammonia nitrogen wastewater
  • A kind of treatment method of ammonia nitrogen wastewater
  • A kind of treatment method of ammonia nitrogen wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Sampling and treatment of industrial wastewater from a chemical company in Jiangsu, including the following steps:

[0024] Detection and classification: Sampling of industrial wastewater shows that the concentration of ammonia nitrogen is 814mg / L, which is less than 1000mg / L, which belongs to the low-medium concentration range, so it directly enters the pretreatment step.

[0025] Pretreatment: Take 100L of this ammonia nitrogen wastewater. According to the water quality of the wastewater, use a 1μm bag filter for pretreatment to remove large suspended particles and part of COD.

[0026] Reverse osmosis separation: send the above-mentioned pretreated ammonia nitrogen wastewater into the reverse osmosis equipment. The permeable membrane selectively intercepts the organic ammonia and small molecule ammonia salt in the wastewater, removes the coexisting chemicals in the wastewater, reduces the COD content of the wastewater, and obtains 95L of filtrate, which enters the io...

Embodiment 2

[0033] The wastewater from a wastewater treatment station of a pharmaceutical company in Shandong was sampled and treated. After testing, the concentration of ammonia nitrogen was 1630mg / L, which was greater than 1000mg / L, and stripping treatment was required; after stripping treatment, the concentration of ammonia nitrogen in the wastewater became 986mg / L L; take 200L of this industrial wastewater, filter and pre-treat it with a 1μm bag filter to remove large suspended particles and part of COD; The original roll-type reverse osmosis membrane is subjected to reverse osmosis treatment to obtain 180L of filtrate and 20L of retentate; the above-mentioned 180L of filtrate is treated with ion exchange resin, and the flow rate of the liquid is controlled within the range of 13-15M / H; finally, the detection is carried out. , and its ammonia nitrogen concentration is 4.3mg / L, which meets the discharge standard.

[0034] The detection data of the whole processing process are as follow...

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Abstract

The invention relates to a treatment method for ammonia nitrogen wastewater, which comprises the steps of detection and classification, stripping treatment, pretreatment, reverse osmosis separation, ion exchange treatment, detection and discharge or recovery. It organically combines reverse osmosis membrane separation and ion exchange, which reduces the possibility of secondary pollution and stabilizes the treatment effect; reduces the amount of resin used in the ion exchange step, prolongs the regeneration cycle of the resin, and reduces the frequency of replacement. It reduces the amount of acid and alkali in the process of ammonia nitrogen elution and resin regeneration, greatly saving operating costs; and combined with the traditional stripping process, it can treat various concentrations of ammonia nitrogen wastewater and has a wide range of applications.

Description

technical field [0001] The invention belongs to the technical field of comprehensive treatment of environmental pollution, and in particular relates to a treatment method for ammonia nitrogen wastewater. Background technique [0002] In recent years, with the increasing urban population and the continuous development of industry and agriculture, water pollution accidents have occurred frequently, posing serious harm to humans and animals. The discharge of nitrogen and phosphorus in many lakes and reservoirs has caused water eutrophication, which seriously threatens human production, life and ecological balance. Ammonia nitrogen is one of the main factors causing water eutrophication. In order to meet the continuous improvement of the public's requirements for environmental quality, the country has formulated more and more stringent discharge standards for ammonia nitrogen. Research and development of economical and efficient ammonia nitrogen removal treatment technology has...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/02C02F1/44C02F1/20C02F1/42
Inventor 戴永琪
Owner 赛普(无锡)膜科技发展有限公司