Device and method for treating petrochemical wastewater by using anaerobic hydrolysis acidification-A/O biological membrane method

A technology for hydrolyzing acidification and petrochemical wastewater

Active Publication Date: 2014-12-24
TSINGHUA UNIV
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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...

Method used

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  • Device and method for treating petrochemical wastewater by using anaerobic hydrolysis acidification-A/O biological membrane method
  • Device and method for treating petrochemical wastewater by using anaerobic hydrolysis acidification-A/O biological membrane 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 a method for treating petrochemical wastewater by using an anaerobic hydrolytic acidification-A/O biological membrane method. The method comprises the following steps: controlling the aeration rate through introducing air into a hydrolytic acidification pool, so that the hydrolytic acidification is in an anaerobic hydrolytic acidification state; arranging a settling pool at the tail section of the hydrolytic acidification pool to carry out sludge backflow, enabling liquid supernatant to enter an A/O biological membrane reactor, filling a porous plastic ball carrier filled with polyurethane foam at the O section, enabling outlet water to enter a secondary settling pool so as to carry out sludge-water separation, refluxing the sludge to the O section and discharging the liquid supernatant. The device and the method have the benefits that the petrochemical wastewater is treated by using the method at a normal temperature, acid and base do not need to be added to regulate a pH value, the reduction of sulfate in the petrochemical wastewater can be effectively restrained, the generation of H2S is reduced, and the corrosion of metal equipment is reduced; a whole wastewater processing system is high in efficiency and reliable in operation and is particularly suitable for upgrading and reconstruction of an existing petrochemical wastewater treatment plant.

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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IPC IPC(8): C02F9/14
Inventor 王建龙王星初里冰
Owner TSINGHUA UNIV
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