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A kind of skl three-phase catalytic oxidation-baf method for advanced treatment of chemical wastewater

A technology for catalytic oxidation and chemical wastewater, applied in the direction of aerobic process treatment, chemical instruments and methods, water/sewage treatment, etc. Effects of collision barrier, reduced operating cost, and convenient operation and management

Active Publication Date: 2019-01-29
NANJING SHENKELONG ENVIRONMENTAL PROTECTION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the difficulties of limited processing load, high operating costs, large investment, and little engineering experience, these new technologies cannot be applied in large-scale projects.

Method used

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  • A kind of skl three-phase catalytic oxidation-baf method for advanced treatment of chemical wastewater
  • A kind of skl three-phase catalytic oxidation-baf method for advanced treatment of chemical wastewater
  • A kind of skl three-phase catalytic oxidation-baf method for advanced treatment of chemical wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Wastewater source: the water from the biochemical secondary sedimentation tank of a sewage treatment plant in a chemical park. The sewage plant mainly treats the production wastewater from more than 70 chemical enterprises in the park, with a processing scale of 25,000 tons per day. After biochemical treatment, the COD of the effluent from the secondary sedimentation tank is 200-300mg / L, the chroma is high, the wastewater quality is complex and the water volume fluctuates greatly, the B / C is low, and it is biodegradable.

[0048] The wastewater was treated by SKL three-phase catalytic oxidation combined with one-stage BAF.

[0049] The effluent from the secondary sedimentation tank is lifted by the pump into the SKL three-phase catalytic oxidation reactor. First, it passes through the SKL-reactor type I, and the reaction time is 15 minutes. Amount of 400-500ppm, catalytic oxidation reaction, SKL-reactor type II reaction time 11min.

[0050] The effluent water from the ...

Embodiment 2

[0059] Wastewater source: MBR effluent after secondary treatment in a sewage treatment plant in a fine chemical industry park, the effluent COD is between 132-168mg / L, NH 3 -N is between 10.9-15.2mg / L.

[0060] The wastewater was treated by SKL three-phase catalytic oxidation combined with one-stage BAF.

[0061] The MBR effluent is lifted by the pump into the SKL three-phase catalytic oxidation reactor, firstly through the SKL-reactor type I, the reaction time is 10min, and the oxidant hydrogen peroxide is added before entering the SKL-reactor type II, the concentration is 30%, and the dosage is 300 -400ppm, for catalytic oxidation reaction.

[0062] The effluent water from the SKL three-phase catalytic oxidation reactor flows into the regulating and stabilizing pool by itself, and the water volume is further adjusted to perfect the reaction. The residence time is 45 minutes.

[0063] The effluent from the adjustment stabilization pond is pumped up into the biological aerat...

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Abstract

The invention relates to a method for advanced treatment of chemical waste water through SKL three-phase catalytic oxidation and BAF. The method comprises: leading waste water into an SKL three-phase catalytic oxidation reactor for reaction; leading the obtained water into an adjusting stabilization pond; leading the obtained water into a biological aerated filter; and finally leading the obtained water out. Chemical waste water subjected to "physicochemical and biochemical" secondary treatment is pumped into the SKL three-phase catalytic oxidation reactor. The waste water subjected to magnetization pre-treatment reacts with a solid-phase catalyst SKL-A and an oxidant for a catalytic oxidation reaction, and an ultrasonic effect is adopted during the reaction process. Pollutants hard to degrade in the chemical waste water are subjected to chain scission and ring opening, the water content is further regulated for reaction improvement, and the obtained water is led into the biological aerated filter for biochemical treatment. Defects of a limited processing load, high operation cost, large investment, and little project experience in a conventional method are overcome. Through adoption of magnetization pre-treatment in the method, the chemical reaction speed and reaction degree are significantly increased; loss of the solid-phase catalyst and the application amount of the oxidant are reduced; and the operation cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of advanced water treatment, in particular to an SKL three-phase catalytic oxidation-BAF method for advanced treatment of chemical wastewater. Background technique [0002] Before the present invention was made, the methods for advanced treatment of chemical wastewater on the basis of anaerobic-aerobic biological treatment mainly included: Fenton oxidation method, ozone oxidation method, supercritical water oxidation method, catalytic wet oxidation method and electric chemical oxidation, etc. Due to the difficulties of limited processing load, high operation cost, large investment and little engineering experience, these new technologies cannot be applied in large-scale projects. [0003] In addition, chemical wastewater may contain a certain amount of heterocyclic nitrogen-containing substances such as pyridine and DMF (N-N-dimethylformamide). Pyridine is a pharmaceutical intermediate with stable chemical properties...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F101/38
CPCC02F1/48C02F1/725C02F3/02C02F9/00C02F2101/38C02F2209/08C02F2209/14C02F2209/16
Inventor 田宝凤江双双秦志兵
Owner NANJING SHENKELONG ENVIRONMENTAL PROTECTION
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