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Method for reducing total organic carbon content of zeolite molecular sieve production wastewater

A technology of total organic carbon content and zeolite molecular sieve, applied in chemical instruments and methods, water pollutants, light water/sewage treatment, etc., can solve the problems of long time, reduce TOC value, complexity, etc. Value, easy-to-operate effects

Inactive Publication Date: 2015-07-15
DALIAN LIGONG QIWANGDA CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After being treated by the SBR process, nitrifying bacteria and denitrifying bacteria were successively added, and the concentration of ammonia nitrogen was lower than 30 mg / L after 10 days of operation; It has a good effect on the removal of ammonia nitrogen, but it takes too long
[0010] Zeolite molecular sieve production wastewater has its particularity in composition, containing a large amount of suspended solids, high salinity, and high ammonia nitrogen. The method for reducing TOC in zeolite molecular sieve production wastewater is relatively complicated in the prior art
[0011] For zeolite molecular sieve production wastewater containing quaternary ammonium salts, quaternary ammonium bases or organic amines, there has been no report on the use of light treatment to significantly reduce the TOC value in one step

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Get 200ml 300ppm tetrapropyl ammonium hydroxide solution, add hydrogen peroxide to it and make initial H 2 o 2 Concentration C H2O2 0 =0.05M, this solution was added to the quartz reactor. Heating in a constant temperature bath, set the temperature to 20°C, turn on the UV lamps (2 pieces, each 125W, wavelength 254nm) after the temperature is stable, take a sample once every 3 hours, dilute the water sample by ten times and use the TOV-V analyzer of total organic carbon cph Determination of its TOC (total organic carbon) value. The results showed that after 3 hours of light treatment, the TOC value decreased from 82.26 mg / L at the initial stage to 30.31 mg / L, and the TOC removal rate was 63.2%.

Embodiment 2

[0032] Get 200ml 500ppm tetrapropyl ammonium hydroxide solution, add hydrogen peroxide to it and make initial H 2 o 2 Concentration C H2O2 0 =0.15M, this solution was added to the quartz reactor. Heating in a constant temperature bath, set the temperature to 10°C, turn on the UV lamps (2, each 125W, wavelength 254nm) after the temperature is stable, take a sample once every 3 hours, dilute the water sample ten times and use the total organic carbon analyzer TOV-V cph Determination of its TOC (total organic carbon) value. The results showed that after 3 hours of light treatment, the TOC value decreased from the initial 141.6 mg / L to 80.24 mg / L, and the TOC removal rate was 43.3%.

Embodiment 3

[0034] Get 200ml 500ppm tetrapropyl ammonium hydroxide solution, add hydrogen peroxide to it and make initial H 2 o 2 Concentration C H2O2 0 =0.15M, this solution was added to the quartz reactor. Heating in a constant temperature bath, set the temperature to 20°C, turn on the UV lamps (2 pieces, each 125W, wavelength 254nm) after the temperature is stable, take a sample once every 3 hours, dilute the water sample by ten times and use the TOV-V analyzer of total organic carbon cph Determination of its TOC (total organic carbon) value. The results showed that after 3 hours of light treatment, the TOC value decreased from the initial 141.6 mg / L to 73.45 mg / L, and the TOC removal rate was 48.1%. Compared with Example 2, the removal rate of TOC increases with temperature.

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PUM

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Abstract

The invention discloses a method for reducing total organic carbon content of zeolite molecular sieve production wastewater by one-step illumination technique. The method is characterized in that hydrogen peroxide is added into zeolite molecular sieve production wastewater to generate hydroxyl free radicals with superstrong oxidizing ability under ultraviolet irradiation so as to conduct oxidative degradation on the organic nitrogen-containing compound in the zeolite molecular sieve production wastewater, and the organic nitrogen-containing compound is one or more of a quaternary ammonium salt, quaternary ammonium base, and organic amine. Compared with traditional methods, the method provided by the invention simplifies the treatment process, saves the treatment time, and is easy to operate. For wastewater containing quaternary amine base and organic amine, the method provided by the invention can directly treat the wastewater without adding acid to conduct neutralization, and the treated water sample is close to neutral.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for reducing the total organic carbon content of zeolite molecular sieve production wastewater. Background technique [0002] Zeolite molecular sieve is a kind of material with uniform pores and regular crystal structure, mainly composed of silicon, aluminum, oxygen and some other metal cations. Due to its unique structure and performance, zeolite molecular sieves can be used as catalysts, adsorbents and ion exchangers, and are widely used in petrochemical, environmental protection, food industry, pharmaceutical and chemical industries. [0003] Many zeolite molecular sieves, such as ZSM-5 and TS-1, require the use of templates in the synthesis process. Common templates include quaternary ammonium bases (such as tetrapropylammonium hydroxide), quaternary ammonium salts (such as tetrapropylammonium bromide), organic amines (such as n-butylamine, diethylamine), e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/32C02F1/72C02F101/38
Inventor 李钢钟鹏飞
Owner DALIAN LIGONG QIWANGDA CHEM TECH
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