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A device and method for treating petrochemical wastewater by microaerobic hydrolysis acidification-a/o biofilm method

A technology for hydrolyzing acidification and petrochemical wastewater, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. environment and other problems, to achieve the effect of improving processing capacity and operation stability, inhibiting sulfate reduction reaction, and increasing biomass

Active Publication Date: 2016-06-15
TSINGHUA UNIV
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  • Claims
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Problems solved by technology

Hydrogen sulfide is a toxic and odorous gas that will corrode metal equipment for hydrolysis and acidification, and sulfide can easily cause a large number of filamentous sulfur bacteria in the aerobic biological treatment system to multiply, resulting in sludge swelling, which is difficult to recover and is easy to be exposed. Gas blowing off, affecting the surrounding environment

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  • A device and method for treating petrochemical wastewater by microaerobic hydrolysis acidification-a/o biofilm method
  • A device and method for treating petrochemical wastewater by microaerobic hydrolysis acidification-a/o biofilm method

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Embodiment 1

[0028] A device for treating petrochemical wastewater by microaerobic hydrolytic acidification-A / O biofilm method, which is composed of a hydrolytic acidification tank, an A / O biofilm reactor and a secondary sedimentation tank connected in sequence; an aeration tube is arranged at the bottom of the hydrolysis acidification tank , by controlling the amount of aeration to make it in the state of microaerobic hydrolysis and acidification; the O section of the A / O biofilm reactor is filled with biological fillers, and the volume filling rate is 30%.

[0029] The biological filler is a porous plastic ball carrier filled with polyurethane foam; each porous plastic ball is filled with four polyurethane foams of 1 cm square.

[0030] A sedimentation tank is provided at the end of the hydrolytic acidification tank for sludge reflux.

[0031] A sludge return pipe is set between the secondary settling tank and section A of the A / O biofilm reactor, and the sludge from the secondary settli...

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Abstract

The invention discloses a device and method for treating petrochemical wastewater by microaerobic hydrolysis acidification-A / O biofilm method. In the invention, air is introduced into the hydrolytic acidification tank to control the amount of aeration so that it is in the state of microaerobic hydrolysis acidification. A sedimentation tank is installed at the end of the hydrolytic acidification tank for sludge reflux. The supernatant enters the A / O biofilm reactor, and the O section is filled with porous plastic ball carriers filled with polyurethane foam. The effluent enters the secondary settling tank for mud-water separation, and the sludge returns to Section O, the supernatant was discharged. The method of the present invention treats petrochemical wastewater at normal temperature, does not need to add acid and alkali to adjust the pH value, can effectively inhibit the reduction of sulfate in petrochemical wastewater, and reduce H 2 The generation of S reduces the corrosion of metal equipment. The entire sewage treatment system has high efficiency and reliable operation, and is especially suitable for standard upgrading and transformation of existing petrochemical sewage treatment plants.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and in particular relates to a device and method for treating petrochemical wastewater by microaerobic hydrolysis acidification-A / O biofilm method. Background technique [0002] There are many types of pollutants in petrochemical wastewater, and the water quality fluctuates greatly. Wastewater contains various refractory organic substances such as petroleum, benzene and benzene derivatives, which have a strong biological toxicity inhibition effect. It is difficult to meet the treatment requirements with a single treatment process, and a combination of several processes is generally used. [0003] Since the 1960s and 1970s, most domestic petrochemical plants have adopted the traditional or improved / old three sets of processes (oil separation-air flotation-activated sludge) for wastewater treatment. 5 The removal effect is better, generally can reach 70% and 90%. However, in recent ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 王建龙王星初里冰
Owner TSINGHUA UNIV
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