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Treatment method of high-salinity high-concentration organic wastewater

A technology of organic wastewater and treatment methods, which is applied in water/sewage treatment, special compound water treatment, heating water/sewage treatment, etc., can solve the problems that cannot realize the treatment of organic pollutants, and achieve increased biodegradability and reaction temperature High, long contact time effect

Inactive Publication Date: 2017-06-13
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For the desalination of wastewater containing high concentrations of organic matter, evaporation (single-effect evaporation, multi-effect evaporation, and MVR, etc.) is the simplest and most effective method, but conventional evaporation methods can only achieve desalination and cannot achieve the removal of organic pollutants in organic wastewater deal with

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  • Treatment method of high-salinity high-concentration organic wastewater
  • Treatment method of high-salinity high-concentration organic wastewater
  • Treatment method of high-salinity high-concentration organic wastewater

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Effect test

Embodiment 1

[0024] A method for treating high-salt and high-concentration organic wastewater, the specific steps are:

[0025] (1) Add high-salt and high-concentration organic wastewater into the evaporation kettle 2, and pass ozone into the evaporation kettle 2 through the ozone generator 1 when the organic wastewater starts to be heated and evaporated;

[0026] (2) The steam generated after the organic wastewater is heated and boiled is mixed with ozone, the mixed gas enters the reaction device 3 through the pipeline for reaction or the mixed gas reacts directly in the pipeline, and the sufficient reaction time of the mixed gas is ensured by adding the reaction device 3 or extending the pipeline In order to fully react the ozone with the volatile organic compounds in the steam;

[0027] (3) The fully reacted mixed gas enters the condensing device 4 for condensation, and the formed condensed water is directly discharged;

[0028] (4) After the organic waste water in the evaporator 2 is ...

Embodiment 2

[0030] The mass fraction of NaCl in the organic wastewater is 3%, the initial pH is 7.0, the concentration of methanol is 4g / L, and the concentration of the surfactant sodium dodecylsulfonate is 0.7g / L. The COD value of the organic wastewater reaches 7000mg / L. Evaporation and The ozone passing time was set as 40min, the volume of the reaction device was 500mL, and the condensation temperature was 0°C. figure 2 Shown is the degradation curve of high-salt and high-concentration organic wastewater containing methanol and surfactants under different ozone production rates at the same evaporation time. It can be seen from the figure that as the ozone production rate increases, the corresponding COD value of the condensate obtained continues to increase. reduce.

Embodiment 3

[0032] The mass fraction of NaCl in the organic wastewater is 3%, the ozone generation rate is 0.9g / h, the concentration of methanol is 4g / L, the concentration of the surfactant sodium dodecylsulfonate is 0.7g / L, and the COD value of the organic wastewater reaches 7000mg / L, the evaporation and ozone passing time is set to 40min, the volume of the reaction device is 500mL, and the condensation temperature is 0°C. image 3 Shown is the degradation curve of high-salt and high-concentration organic wastewater containing methanol and surfactants at different initial pHs. The data in the figure shows that the pH of organic wastewater has no obvious effect on the removal rate of COD. When the pH of organic wastewater is greater than 7.0, the condensed water COD degradation rate decreased.

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Abstract

The invention discloses a treatment method of high-salinity high-concentration organic wastewater, comprising: adding high-salinity high-concentration organic wastewater into an evaporating kettle, and introducing ozone into the evaporating kettle through an ozone generator at the beginning of heating and evaporating the organic wastewater; mixing ozone with steam generated by heating and boiling the organic wastewater, and charging the mixed gas into a reactor through a pipeline for the purpose of reaction or reacting the mixed gas directly in the pipeline, wherein a reactor is added or the pipeline is extended to ensure sufficient reaction time of the mixed gas so that the ozone fully reacts with volatile organic compounds in the steam; charging the fully reacted mixed gas into a condensing device for condensing, and discharging the formed condensate directly; after the organic wastewater in the evaporating kettle is evaporated completely, subjecting the residual salt and refractory organic matters therein to recycling and separation or solid waste treatment. The treatment method according to the invention can provide desalination for the high-salinity high-concentration organic wastewater and degradation for the organic pollutants in the wastewater, the process is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a treatment method for high-salt and high-concentration organic wastewater. Background technique [0002] High-salt organic wastewater mainly comes from industries such as chemical industry, food processing, printing and dyeing, oil exploration, and pharmaceutical and pesticide production. These wastewater often contain high concentrations of organic matter in addition to high concentrations of inorganic salts. These high-salt and high-concentration organic wastewater has a strong inhibitory effect on microorganisms. The conventional treatment method is to desalinate and regenerate first. For the desalination of wastewater containing high concentrations of organic matter, evaporation (single-effect evaporation, multi-effect evaporation, and MVR, etc.) is the simplest and most effective method, but conventional evaporation methods can only achie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04C02F1/78C02F101/34C02F101/30
CPCC02F1/048C02F1/78C02F2101/30C02F2101/301C02F2101/34C02F2101/40C02F2305/02Y02A20/124
Inventor 郑立庆张灵朱桂芬王春峰李春立贠嘉旗逯通
Owner HENAN NORMAL UNIV
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