System of using iron-carbon-Fenton pretreatment-UBF-A/O for treating dye waste water and method thereof

A technology for iron carbon Fenton and dye wastewater, which is applied in multi-stage water treatment, water/sewage treatment, water treatment parameter control, etc. Processing power, the effect of increasing the speed of biochemical reactions

Active Publication Date: 2017-01-04
江苏南大华兴环保科技股份公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] Aiming at the problem that the existing high-COD and high-salt dye wastewater is difficult to treat efficiently and at low cost, the present invention provid

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  • System of using iron-carbon-Fenton pretreatment-UBF-A/O for treating dye waste water and method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, a Fenton oxidation-UBF anaerobic treatment-A / O system and method for treating dye wastewater in this embodiment is applied to a wastewater treatment station for dye wastewater in Binhai Chemical Industry Park, Jiangsu Province.

[0043] A dye wastewater treatment station in Jiangsu Binhai Chemical Industry Park includes pH adjustment tank, iron-carbon micro-electrolysis tank, Fenton oxidation tank, neutralization sedimentation tank, UBF reaction tank, A tank, O tank, vertical flow sedimentation tank and discharge tank.

[0044] The size of the pH adjustment pool is length × width × height = 8 × 7.8 × 5m, V = 312m 3 , effective volume 260m 3 , the residence time is 4h, the pH adjustment pool adopts the bottom 75°pH adjustment pool to flow water to the iron-carbon micro-electrolysis pool; the iron-carbon micro-electrolysis pool is composed of two iron-carbon micro-electrolysis pools connected in series, and the effective volume of each pool is ...

Embodiment 2

[0051] A system for treating dye wastewater using iron-carbon micro-electrolysis Fenton pretreatment-UBF-A / O in this embodiment:

[0052] After dye production wastewater is regulated by domestic sewage, the salt content needs to be reduced to 2200mg / L to prevent adverse effects on the microorganisms in the subsequent biochemical tank. The pH value of the wastewater adjusted by the pH adjustment tank is 2; the iron, carbon and catalyst in the iron carbon ball packing The mass ratio is 8.5:2:1, the porosity of high temperature sintering at 1000°C reaches 58%, and the specific surface area is 1.8 square meters per gram; the concentration of hydrogen peroxide in the Fenton oxidation tank is 15000ppm; the COD concentration of the pH adjustment tank in this embodiment reaches 2880mg / L, the COD of the effluent is stable to 1370mg / L. Compared with the traditional ozone process and wet oxidation process, the iron-carbon-Fenton technology not only achieves the removal of COD, but also r...

Embodiment 3

[0054] A system for treating dye wastewater using iron-carbon micro-electrolysis Fenton pretreatment-UBF-A / O in this embodiment:

[0055] The reflux ratio of the UBF system is 200%, and the rising flow rate of the UBF is controlled at 70m 3 / h, the rising flow rate is controlled at 0.7m / h, and the organic load is controlled below 5kg; the reflux ratio of the nitrifying liquid in the O tank is 200%, and the sludge reflux ratio of the vertical flow sedimentation tank is 150%.

[0056] In this embodiment, the COD concentration of UBF influent reaches 1370 mg / L, and the COD concentration of UBF effluent is 1070 mg / L.

[0057] The hydraulic retention time of the A / O tank is 3h and 4h respectively, the residence time of the vertical flow sedimentation tank is 18h, the sludge return ratio is 150%, the COD concentration of the influent is 1070mg / L, and the COD of the vertical sedimentation tank is 420mg / L . Compared with the traditional UASB reactor, the UBF with filter layer and re...

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Abstract

The invention discloses a system of using iron-carbon-Fenton pretreatment-UBF-A/O for treating dye waste water and a method thereof, and belongs to the technical field of waste water treatment. The method includes the steps that the dye waste water enters a pH adjusting pond first, the pH value is adjusted to be stabilized at 2-3, the dye waste water enters an iron-carbon microelectrolysis pond and a Fenton oxidization pond, outlet water of the Fenton oxidization pond enters a neutralizing settling pond, the waste water is neutralized until the pH value is about 8, and then anionic PAM is added to complete sludge-water separation; outlet water of the neutralizing settling pond is pumped into a UBF treatment system, a biological film cultured by filler under the anaerobic environment can purify the upwelling waste water, and meanwhile a return-flow system can ensure stable ascending velocity of the waste water in a UBF and effectively buffer impact loads. After the outlet water of the UBF is treated through the A/O process, nitrifying liquid of an aerobiotic pond returns to an anaerobic pond to enhance the denitrification effect, outlet water of the aerobiotic pond enters a vertical settling pond, and outlet water of the settling pond meets the requirement for water quality of pipe network takeover in a chemical industrial park. The method has the advantages of being good in treatment effect and high in impact load resistance.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and more specifically relates to a system and method for treating dye wastewater by using iron-carbon Fenton pretreatment-UBF-A / O. Background technique [0002] At present, the treatment rate of dye wastewater in my country is less than 30%, and the qualified rate is less than 60%. The domestic dye wastewater treatment process is mainly based on biological methods, and most enterprises have built their own sewage treatment stations, but the treatment effect is not good, and decentralized treatment is the main method. Dye wastewater treatment includes various methods, which can be divided into physical, chemical and biological methods according to different treatment principles. In practical applications, the water quality fluctuates greatly, and a single treatment method often cannot make the effluent meet the water quality standard of the sewage treatment station in the chemical in...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30C02F101/16
CPCC02F1/46114C02F1/56C02F1/66C02F1/722C02F3/2806C02F3/2866C02F3/305C02F9/00C02F2101/16C02F2101/308C02F2209/06C02F2209/08C02F2301/046C02F2301/08C02F2305/026
Inventor 戴建军丁同刚杨峰周腾腾蔡国飞朱强
Owner 江苏南大华兴环保科技股份公司
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