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Method and system for treating toluene nitrification wastewater

A technology of nitrification wastewater and treatment method, which is applied in the directions of oxidized water/sewage treatment, multi-stage water treatment, natural water treatment, etc., can solve the problems of high treatment cost, high ozone treatment cost, microbial death, etc., and achieve sludge settling performance. Good, avoid sludge bulking phenomenon, inhibit the effect of reproduction

Inactive Publication Date: 2016-05-11
山东彩客新材料有限公司
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Problems solved by technology

Since the discharge of nitroaromatic compounds into the biochemical system can easily lead to the death of microorganisms, therefore, toluene nitrification wastewater cannot be directly treated by biochemical processes
[0003] At present, the treatment process of p-toluene nitrification wastewater in China is mainly based on the chemical agent method, that is, adding NaClO, Fenton reagent, and iron powder; but this method produces a large amount of iron-containing sludge containing nitrobenzene and nitrophenols. This type of sludge is a hazardous waste, and its treatment cost is high, and it is a pollutant strictly controlled by the state.
If the ozone oxidation method is used, it can achieve the equivalent effect of Fenton's reagent without generating sludge, but the high cost of ozone treatment limits the popularization and application of this technology

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  • Method and system for treating toluene nitrification wastewater
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  • Method and system for treating toluene nitrification wastewater

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Embodiment Construction

[0037]The treatment method and system of the toluene nitrification wastewater of the present invention adopt the combination of ozone treatment technology and biochemical treatment technology, and first use ozone to pretreat the toluene nitrification wastewater, improve the biodegradability of the wastewater, and its B / C ratio can reach 0.4 to 0.6, Afterwards, low-cost biochemical methods are used for treatment, and the biochemical system bears 70% to 80% of the pollutant treatment load. Applying the method or system of the present invention to treat toluene nitrification wastewater does not produce hazardous waste sludge, and can effectively reduce the cost of ozone technology and devices, and further enable the advanced treatment of nitrification wastewater to meet the national sewage discharge Class A standard (direct discharge standard).

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodi...

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Abstract

The invention relates to the technical field of treatment of wastewater containing nitroaromatics, and discloses a method and a system for treating toluene nitrification wastewater. The method comprises the following steps: carrying out ozone pre-oxidation treatment, anaerobic biochemical treatment, aerobiotic biochemical treatment, facultative anaerobic biochemical treatment and secondary aerobiotic biochemical treatment on the toluene nitrification wastewater in sequence; then, carrying out ozone post-oxidation treatment on the toluene nitrification wastewater, and degrading and filtering the toluene nitrification wastewater through a biological aerated filter. After the method or the system disclosed by the invention is applied to treating the toluene nitrification wastewater, the water quality can reach the discharge requirement, and the treatment cost is low.

Description

technical field [0001] The invention relates to the technical field of treating waste water containing nitro aromatic compounds. Background technique [0002] Nitrotoluene is an important fine chemical intermediate, produced by nitration of toluene. The toluene nitrification process will produce a large amount of nitrification wastewater, which contains more nitroaromatic compounds, has many by-products, high toxicity, and is difficult to biochemically. Series of ecological impacts and environmental effects. Nitroaromatic compounds can accumulate in organisms, produce amplification effects in the biological chain, and even endanger life and health. Since the discharge of nitroaromatic compounds into the biochemical system can easily lead to the death of microorganisms, the toluene nitrification wastewater cannot be directly treated by biochemical processes. [0003] At present, the treatment process of p-toluene nitrification wastewater in China is mainly based on the che...

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Application Information

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IPC IPC(8): C02F9/14C02F103/36
CPCC02F9/00C02F1/78C02F3/08C02F3/2866C02F3/30C02F2103/36C02F2301/08
Inventor 李向前刘江宁晋平
Owner 山东彩客新材料有限公司
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