SU1404467A1 - Apparatus for biological treatment of waste water - Google Patents

Abstract

The invention relates to biochemical processes for the treatment of effluents contaminated with organic waste, in particular spent drilling mud used in the construction of oil and gas wells. The purpose of the invention is to intensify biochemical purification processes by increasing the biochemical contact between microorganisms, polluters and air oxygen. The device consists of a pump 1, the discharge line of which through the hydrodynamic emitter 2 of acoustic oscillations is connected to the aeration tank 3 with the airlift 4 and the cached nozzle 5. Sewage water under pressure is pumped through the hydrodynamic emitter 2, in which there is an intense dispersion of air bubbles and particles . Then the water enters the aeration tank 3, in which constant circulation is maintained. Purified water is discharged from the upper part of the aero tank. The application of the invention allows to significantly intensify the process of wastewater treatment, 1 hp, f-crystals, 3 sludge. cl

Description

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The invention relates to biochemical wastewater treatment processes and can be used to clean sewage contaminated with organic waste, in particular spent cleaning fluids used in the drilling of oil and gas wells.

The purpose of the invention is to intensify biochemical purification processes by increasing the surface of contact between microorganisms, polluters and air oxygen.

intense vortex layer. The twisting of the flow causes centrifugal forces that press the liquid to the surface of the vortex chamber. As a result, the jets at the exit of the vortex chamber form a flow cone spreading at high speed. Under the action of centrifugal forces and radial flow spreading, a relative rarefaction occurs inside this cone, which propagates into the vortex chamber, into which the zone 13 is sucked through

Fig. 1 shows the scheme of installation of atmospheric oxygen. Such a change for the biological treatment of waste water dispensers} in FIG. 2 is a hydrodynamic emitter of acoustic vibrations, a longitudinal section in FIG. 3 is a section AA in FIG. 2,

The device for biological treatment consists of a pump 1, the discharge line of which, through a hydrodynamic emitter 2, acoustic oscillations is connected to the aero-sump 3 with the airlift activator 4 installed along it and the cased nozzle 5 with microorganisms immobilized on it. The nozzle is designed as a cassette in order to increase convenience and speed of its replacement, a discharge device 6 is installed in the lower conical part of the aero-settling tank 3 to remove sludge sediments and empty the aero-tank. To recirculate water, line 7 is provided, connecting the conical part of the aerotank with the pump inlet,

The hydrodynamic emitter of acoustic oscillations (FIGS. 2 and 3) comprises a housing 8 with an opening 9 for supplying water. Inside the case, a swirler 10 is installed with multiple spiral threading 11, the vortex chamber 12 is located under the central part of the swirler 10 and is communicated by the nozzle 13 with the atmosphere,

Using pump 1, waste water from a settling tank under pressure is pumped through a hydrodynamic radiator 2 into the aeration tank 3, the drained pressurized water created by the pump 1 enters the body of the radiator and, through multiple spiral cutting 11, swirler 10 is fed into the vortex chamber 12, The jets of fluid, introduced tangentially into the chamber, twist and form

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The alternation of vacuum and compression leads to the excitation of the ultrasonic field. Jet breaks leading to a decrease in pressure in the vortex chamber to a value equal to the pressure of saturated vapors lead to the appearance of a cavitation effect, which performs the main function in dispersion processes. Thus, the formation of an acoustic field in a hydrodynamic radiator is associated with the transformation of energy in a fluid flow.

Trapped air bubbles and particles of a polluter under the action of alternating forces of acoustic oscillations undergo intense dispersion, which is facilitated by the sorption processes of air by polluter particles resulting from the joint introduction of air and polluters into the acoustic field.

Due to the enhanced dispersion of air and particles, the active surface, which is subject to biochemical oxidation, which enters the aerotank of contaminants, increases significantly, and the area of contact with microorganisms is almost maximized. The waste water thus treated is fed to the aero tank 3 through the airlift activator 4, which maintains the constant circulation of the waste water from the bottom up, inside it and from the top down in the nozzle cassettes, due to which oxidized products are washed out of the nozzle and deposited in the lower part of the aerator, Water aftertreatment is carried out due to additional recycling by recirculation by collecting it from the lower part of the aerator and feeding it to the pump inlet.

intense vortex layer. The twisting of the flow causes centrifugal forces that press the liquid to the surface of the vortex chamber. As a result, the jets at the exit of the vortex chamber form a flow cone spreading at high speed. Under the action of centrifugal forces and radial flow spreading, a relative rarefaction occurs inside this cone, which propagates into the vortex chamber, into which the zone 13 is sucked through

atmospheric oxygen. Such a change

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The alternation of vacuum and compression leads to the excitation of the ultrasonic field. Jet breaks leading to a decrease in pressure in the vortex chamber to a value equal to the pressure of saturated vapors lead to the appearance of a cavitation effect, which performs the main function in dispersion processes. Thus, the formation of an acoustic field in a hydrodynamic radiator is associated with the transformation of energy in a fluid flow.

Trapped air bubbles and particles of a polluter under the action of alternating forces of acoustic oscillations undergo intense dispersion, which is facilitated by the sorption processes of air by polluter particles resulting from the joint introduction of air and polluters into the acoustic field.

Due to the enhanced dispersion of air and particles, the active surface, which is subject to biochemical oxidation, which enters the aerotank of contaminants, increases significantly, and the area of contact with microorganisms is almost maximized. The waste water thus treated is fed to the aero tank 3 through the airlift activator 4, which maintains the constant circulation of the waste water from the bottom up, inside it and from the top down in the nozzle cassettes, due to which oxidized products are washed out of the nozzle and deposited in the lower part of the aerator, Water aftertreatment is carried out due to additional recycling by recirculation by collecting it from the lower part of the aerator and feeding it to the pump inlet.

The purified water is discharged from the top of the aerator, and the sludge residue is discharged through the discharge device 6,

The application of the invention allows to significantly improve the process of wastewater treatment.

Claims (1)

Invention Formula 1 A device for biological treatment of wastewater, containing an aerotank-settling tank and a pump for feeding wastewater into it, characterized in that, in order to intensify biochemical treatment processes by increasing the contact surface between the microorganism five it is equipped with a hydrodynamic acoustic oscillator installed on the pump’s discharge line and a recirculation line, and the settling tank is equipped with a cassette nozzle with microorganisms immobilized on it and aerotank axes, 2, the device according to claim 1, about tl and the fact that the hydrodynamic emitter of acoustic oscillations is equipped with a swirler with multiple spiral cutting and a vortex chamber in communication with the atmosphere. ten J2 FIG. 2 Fie-d