SU1373692A1 - Apparatus for biochemical cleaning of waste water - Google Patents

Description

(21) 4041604 / 31-26

(22) 03/24/86

(46) 02.15.88.BKSH. № 6

(71) Ukrainian Institute of Water Engineers

(72) 0.II.Sinev and OVDi Chuk

(53) 628.353.3 (088.8)

(56) USSR Author's Certificate No. 812757, cl. C 02 F 3/04, 1980.

USSR Author's Certificate No. 1020379, cl. C 02 F 3/02, 1983.

Sinev O.P. Intensification of biological wastewater treatment, Kiev; Technique, 1983, p.48.

Yakovlev S.V., Voronov Yu.V. Biological} iltres. 2nd ed. , M.: Stroyizdat, 1982, p.66.

(54) DEVICE FOR BIOCHEMICAL TREATMENT OF WASTE WATER

(57) The invention can be used for biochemical wastewater treatment with simultaneous mineralization of excess biomass. Improving the cleaning efficiency by increasing the oxidizing power of the device and ensuring control of the processes of cleaning and mineralization of excess biomass is achieved due to the presence of a jet aerator with an adjustable annular channel. The aerator is placed above the surface of the liquid in the aeration chamber. Its axial tube is connected to the biofilter pallet hole. The side entry of the aerator is connected to the pressure pipe of the circulation pump. By regulating the flow rate of the circulating fluid entering the jet aerator, it is possible to provide optimal conditions for the treatment process of the fluid in the biofilter due to its ventilation and purification process in the aeration zone, as well as the degree of mineralization of excess biomass. 2 Il.

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The invention relates to wastewater treatment, in particular to combined devices for aerobic biochemical wastewater treatment.

The purpose of the invention is to increase the cleaning efficiency by increasing the oxidizing power of the device and ensuring control of the cleaning and mineralization processes of the excess biomass.

Figure 1 shows the proposed device, a General view; figure 2 - jet aerator with adjustable annular cross section.

The device consists of a cylindrical body 1, divided by a vertical annular partition 2 into aeration chambers 3 and settling 4, bio (1 liter 5, a pallet 6 located under it with a central hole 7, a jet aerator 8, irrigation system 9, circulation pump 10, chambers 11, process piping 12-16 and the unit 17 controlling the operation of the jet aerator 8.

The jet aerator 8 with an adjustable annular cross-section contains a side nozzle 18 for introducing recirculation fluid, a movable central tube I 9 with an adjusting cone 20 connected to the central hole 7 in the pan 6 by means of a stuffing box 21, and the body 22 of the jet aerator - using a threaded joint 23 Moving the air tube with the adjusting cone 20 in the vertical direction is carried out by means of a worm gear 24, as a result of which the area of the annular channel 25 changes.

The device works as follows.

The wastewater to be cleaned through conduit 13 enters chamber 1I displaced and, together with recirculation flow, pump 10, conduit 12 is fed to a jet aerator 8 and irrigation system 9. When the wastewater is distributed over the surface of the biofilter 5, it is partially aerated, and further oxygen dissolution occurs. air in the waste liquid occurs during its movement with the air through the loading of the biofilter. The movement of air in the downward direction occurs due to the discharge 1 in the pan 6, created by the jet aerator when the recycle flow passes through it. With the passage of waste fluid through the biofilter under the influence of microorganisms of the biofilm, fixed on the load, it is partially cleaned. In the aeration chamber 3, an additional treatment of the received

through the air pipe of the jet aerator of the waste liquid, the mineralization of excess biomass occurs here. After separation of the sludge mixture in the settling chamber 4, the

Waste water through conduit 16 is discharged from the device. Saline biomass production is carried out through pipelines 14 and 15.

The use of jet aerator with

An adjustable annular cross section connected by a movable air tube with a central hole in the pan simultaneously solves two problems: aeration of the waste liquid in the aeration chamber and ventilation of the biofilter loading. The forced ventilation of the loading of the biofilter in the direction coinciding with the direction of movement of the purified water allows for intensification of

to create mass transfer processes occurring in the biofilm and liquid, to use loading with a higher specific surface to maintain higher concentrations of the biofilm,

 less chance of silting up the biofilter loading. The management of the processes of purification and mineralization of excess biomass is carried out by changing the ratio of recirculation

the expenses given through the biofilter and the jet aerator with an adjustable annular section. B Hours of Minimum Inflow or Low Intake of Wastewater

Ratios increase the intensity of aeration in the aeration chamber by increasing the recirculation flow rate through the jet aerator, and at the hours of maximum inflow or flow

BbicojcHMn wastewater with pollution concentration increases the residence time of the wastewater in the biofilter by increasing the recycle flow through the biofilter. Wherein

The optimum speed in the annular section of the jet aerator and the amount of air drawn in is regulated by changes in the annular area. Intensive mixing

The sludge mixture and the crushing of biomass cotton in a jet aerator improve the flow of substrate and oxygen to the bacterial cells and thereby increase the oxidation rate of the contaminants and allow for a deeper degree of mineralization of the excess biomass.

Compared with the prototype, the proposed device allows increasing the efficiency of wastewater treatment by 20-30% by increasing the oxidizing power of the device and enabling control of the processes of purification and mineralization of excess biomass. The duration of the mineralization of excess biomass is reduced by 1.5-2 times. In addition, the design of the device is simplified and its height dimensions are reduced.

Claims (1)

Invention Formula A device for bioxide: a precision wastewater treatment system containing ... rokononic casing divided by a vertical annular partition into aeration and settling zones, biofilter, a pan located under it with a central opening, a sprinkler system connected to the pressure pipe of the circulation pump, a mixing chamber and process piping, characterized in that cleaning efficiency by increasing the oxidizing power of the device and ensuring control of the processes of cleaning and mineralization of excess biomass, it is equipped with liquid in the aeration chamber with a jet aerator, including a housing, a central tube, the lower end of which forms an annular channel with the housing wall, and a side fluid inlet, the upper end of the ventral tube connected to the pallet opening, and the lateral entry is connected to the pump discharge pipe. 25 FIG. 2