Treating process of waste water containing binary acid and its appts

A technology of wastewater treatment and dibasic acid, applied in energy wastewater treatment, light water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problem of unresolved chromaticity of wastewater, and achieve fast film hanging and short acclimation period. , the effect of water stability

Inactive Publication Date: 2004-08-11
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after biological treatment, the chromaticity of wastewater was not resolved, but slightly increased (Yang Jian, Huang Weixing, etc.

Method used

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  • Treating process of waste water containing binary acid and its appts
  • Treating process of waste water containing binary acid and its appts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: the preparation of biological carrier

[0021] Using polypropylene as raw material, it is compressed into a Φ30mm honeycomb tube by a compression molding machine, cut into a columnar packing with a length of 15mm, and a density of 0.94×10 3 kg / m3.

Embodiment 2

[0022] Embodiment 2: the preparation of catalyst

[0023] 100g TiO 2 The carrier was added to 500mL with a concentration of 0.3mol / L AgNO 3 In the solution, soak at 60°C for 5 hours with constant stirring. The reaction mixture was then irradiated under 365 nm UV light for 8 hours. Wash the catalyst 3-4 times with deionized water. The reaction product was left to settle, and the catalyst was separated by pouring the supernatant overnight, and then dried at 120° C. for 2 hours, and the dried solid was ground to 100-200 mesh to obtain catalyst A.

Embodiment 3

[0024] Embodiment 3: Utilize the biological carrier of embodiment 1, get back activated sludge from Dalian Gangwan Liquid Storage Tank Wharf Co., Ltd., carry out inoculation domestication, after the stable operation of the system, use mixed dibasic acid (C 4 ~C 6 ) wastewater for continuous experiments, the pH of the wastewater was adjusted to 6-7, and the working conditions of the biological oxidation experiment at normal temperature and pressure are shown in Table 2.

[0025] Table 2

[0026] Inlet water HR Outlet water COD cr

[0027] Work flow COD cr Chroma T COD cr Chromaticity Removal rate

[0028] Times (l / d) PH pH

[0029] (mg / l) (fold) (h) (mg / l) (fold) (%)

[0030] 1 0.4 3737 6.0 582 24 127 8.5 629 96.6

[0031] 2 0.6 3766 6.3 593 16 167 8.5 620 95.6

[0032] 3 0.8 3766 6.0 586 12 217 8.5 632 94.2

[0033] 4 0.9 3686 6.0 586 10 228 8.4 617 93.8

[0034] 5 1.0 3686 6.0 580 8 296 8.4 596 92.0

[0035] From the ...

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Abstract

In the treatment of waste water containing binary acid, biological fluidized bed technology and Ag / TiO2 photocatalytic oxidation technology are adopted. Stuffing is added into the biological fluidized bed to increase the microbe living space, increase biomass and raise organic load rate; and partial water is made to circulate to increase oxygen dissolved in waste water and eliminate organic matters in water effectively in constant aeration condition. The effluent from the biological fluidized bed is then treated in Ag / TiO2 photocatalytic oxidation equipment with certain amount of catalyst and air as oxidant; and under irradiation of ultraviolet ray the pollutant in water is photocatalytically oxidized. The present invention is suitable for treating waste water containing short-chain and long-chain binary acid, and has obvious treating effects including CODcr eliminating rate of 96.1% and chroma eliminating rate of 97.4%.

Description

technical field [0001] The invention belongs to a chemical wastewater treatment method and its device, in particular to a combination technology of biological oxidation and photocatalytic oxidation to treat mixed (C 4 ~C 6 ) method and device for dibasic acid organic wastewater. Background technique [0002] At present, there are many chemical wastewater treatment methods, and the biological fluidized bed has the advantages of high adaptability to water quality and quantity, good removal effect, high volume load, stable and reliable system operation, less land occupation, and low investment and operating costs. And it has been widely promoted, and new technologies and new processes are constantly being applied in water treatment projects. Photocatalytic oxidation technology has strong oxidation ability in eliminating organic pollution (can remove most organic pollutants in water), mild reaction conditions (normal temperature, normal pressure), and clean products (H 2 O.CO...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06C02F1/32C02F9/14
CPCY02W10/37
Inventor 于永辉刘守新孙承林肖羽堂
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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