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Treatment method of organic matter in high-salt wastewater

A technology for high-salt wastewater and a treatment method, applied in the field of wastewater treatment, can solve problems such as high chemical oxygen demand discharge standards, human health and environmental threats, and achieve the effects of small external factors, reduced pollutant content, and simple operation.

Active Publication Date: 2020-02-21
BEIJING UNIV OF CHEM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in practical applications, since the high-salt organic wastewater contains a certain amount of organic matter, when it is treated by multiple-effect evaporation technology, the secondary steam system still contains some volatile organic matter, resulting in secondary reuse water after condensation. High COD (chemical oxygen demand) does not meet the national emission standards, especially the circulation of toluene in the "triphenyl" substances into the environment, which poses a serious threat to human health and the environment

Method used

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  • Treatment method of organic matter in high-salt wastewater

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Embodiment approach

[0044] According to a preferred embodiment of the present invention, the relative humidity of the secondary steam is 0-100%, preferably 45%-100%, more preferably 80%-100%, especially preferably 95%-100%.

[0045] Wherein, the relative humidity is the percentage of the water vapor pressure in the secondary steam and the saturated water vapor pressure.

[0046] The inventors have found through research that the process of the present invention can efficiently degrade secondary steam with a relative humidity of 0 to 100%, especially when the relative humidity of the secondary steam is high (such as 80% to 100%, 95% to 100%), and its photocatalytic oxidation degradation efficiency can still be maintained at a relatively high level.

[0047] According to a preferred embodiment of the present invention, the secondary steam includes volatile organic gases, preferably benzene series volatile organic gases.

[0048] Wherein, a large amount of volatile organic gases in the secondary st...

Embodiment 1

[0104] use figure 1 The system shown performs the degradation of toluene gas;

[0105] N in the first cylinder 2 and O in the second cylinder 2 Concentrations are greater than 99%, the concentration of toluene standard gas in the third cylinder is 200ppm, set N 2 The flow rate is 200ml / min, O 2 The flow rate of the toluene gas is 80ml / min, the flow rate of the toluene standard gas is 120ml / min, the flow rate of the water sucked by the peristaltic pump is 0.02ml / min, the temperature of the vaporization chamber is 100°C, the concentration of the prepared toluene gas is 60ppm, and the relative humidity is 95%;

[0106] The prepared toluene gas is passed through the air inlet of the reaction chamber, the flow rate is 400ml / min, and the residence time is 30s. The catalyst in the reaction chamber is activated carbon loaded with titanium dioxide, and the consumption is 5g, wherein the content ratio of titanium dioxide to activated carbon is 0.57 : 100, adjust the AC voltage to 1...

Embodiment 2

[0111] This embodiment is similar to Embodiment 1, the difference is that the flow rate of water inhaled by the peristaltic pump is 0.01ml / min, and the relative humidity of the prepared toluene gas is 45%;

[0112] The concentration of the toluene gas that obtains after photocatalytic oxidation is 3.24ppm (, degradation efficiency is 94.6%;

[0113] The content of toluene in the condensed recovered water was 0.239mg / L.

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Abstract

The invention discloses a treatment method of organic matter in high-salt wastewater and a system simulating the method. The method comprises the step of performing photocatalytic oxidation treatmenton secondary steam obtained after evaporation of the high-salt wastewater, so that the pollutant content is effectively reduced, and condensed recycled water obtained after treatment reaches the national first-class discharge standard and is safe and reliable. The system comprises a gas distribution device used for generating the secondary steam and a photocatalytic oxidation device used for degrading the secondary steam. The system is simple in structure, convenient to use and simple and accurate in operation, gas flow control is accurate, and the influence of outside factors is small.

Description

technical field [0001] The invention relates to the field of wastewater treatment, in particular to a method for treating organic matter in high-salt organic wastewater. Background technique [0002] High-salt organic wastewater mainly comes from the fields of chemical industry, pharmacy and petroleum processing, etc. It refers to wastewater containing organic matter and total dissolved solids (TDS) of at least 3.5% (mass concentration). Most of the salts contained in high-salt organic wastewater are Cl - , SO 4 2- 、Na + , Ca 2+ The types and chemical properties of organic substances such as salts vary greatly due to different production processes, but mainly include phenols, alcohols and aromatic hydrocarbon compounds. [0003] There are many treatment methods for high-salt organic wastewater, mainly including biological method, membrane separation method, incineration method and evaporation crystallization method. However, the single aerobic and anaerobic processes a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/04B01D53/86B01D53/72B01D53/44C02F101/30
CPCC02F1/048B01D53/8668B01D53/8687C02F2101/30C02F2301/08B01D2257/7027B01D2257/708B01D2258/02B01D2259/806
Inventor 余江苏小姣朱圳
Owner BEIJING UNIV OF CHEM TECH
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