SU1493620A1 - Installation for treating waste water - Google Patents

Abstract

The invention relates to the treatment of wastewater, in particular, to the complete removal of organic compounds, including nitrogen and phosphorus, followed by denitrification of the resulting nitrates. The purpose of the invention is to simplify the design and reduce the cost of treatment by combining the processes of aerobic and anaerobic treatment of wastewater in one structure. The device consists of sections 3 and 4 of aerobic cleaning of a curvilinear form in which carriers of the 1st biocenosis are located in the form of perforated discs, an anaerobic capacity, and systems 8 and 9 of the supply and discharge of fluid. The initial fluid is supplied to section 3, where it undergoes nitrification, through overflow slots 5 the liquid enters the anaerobic container, and from there through overflow slots 5 to the secondary section 4. The invention reduces the capital and energy costs due to the compact arrangement of the working containers. 3 il.

Description

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The invention relates to a wastewater treatment (CB) technique, namely the complete removal of organic compounds, including nitrogen and phosphorus, followed by denitrification of the nitrates produced, and is intended for use, for example, in fish farming and other areas.

The purpose of the invention is to simplify the construction and reduce the cost of treatment by combining the processes of aorobic and anaerobic treatment of wastewater in one structure.

FIG. 1 shows the proposed device, top view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one.

The device consists of perforated discs 1 placed on a horizontal shaft 2 in the primary and secondary sections 3 and 4 of aerobic cleaning, overflowing slits 5, anaerobic tank 6, dividing partition 7, systems 8 and 9 supplying and discharging the liquid being cleaned, as well as a curved bottom 10 aerobic part of the structure.

The wastewater treatment device operates as follows.

The liquid to be cleaned through the distribution system 8 is supplied to the primary section 3 of aerobic treatment, where it undergoes a nitrification process using a biocenosis fixed on perforated disks 1. The disks are immersed at 0.45 of their diameter, the rotation of the perforated discs is provided by means of a gear motor with a frequency corresponding to the speed on the rim of 0.15 m / s. In the area of increasing free surface liquid flows through overflow slots 5 to anaerobic tank 6 where it undergoes denitrification. Then the liquid enters through the overflow slit 5 into the secondary section 4 of aerobic treatment, where it is also subjected to contact with a fixed biocenosis, deaeration of metabolic products and aeration before discharging through system 9 into the reservoir.

Thus, the processes of nitrification and denitrification are combined

within the same facility. Hydra-gg wastewater, a rational use of communication between the three separation of land, the economy of the construction is carried out for the construction materials, the flow of energy through rotating rotary communications, the reduction of energy of the disks. Perforated-consumption rotation, since the movement of fluid

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discs provide fluid transfer holes as they rotate. When the holes in the disks are immersed in the liquid, they perform a function of the effluent, and when they exit the liquid from the sources, as a result of fluid transfer and pouring out of the holes, an increase in the free surface level is observed and the pressure gradient provides circulation flow. Accordingly, the water level at the disc outlet from the liquid rises, and at the inlet decreases relative to the static level of the free surface. This effect underlies the constructive implementation of the structure. The liquid enters from the primary aeration section through the overflow slit into the anaerobic container and then to the secondary aeration section. At the same time, the mark of the slots corresponds to the level of the fluid in the aeration sections (in the absence of rotational motion of the perforated disks). Aeration tanks (primary and secondary) are located coaxially and rotated 180 ° with respect to each other so that the liquid can move along the specified path due to the pressure gradient that occurs when the perforated discs rotate.

The arrangement of the sections turned 180 in relation to each other ensures the circulation of fluid through the cleaning tank.

The use of rotating perforated discs makes it possible to achieve the original flow of fluid in aeration tanks 3 and 4, which makes it possible to combine in one

the construction of a complex process of deep wastewater treatment, including nitrification and denitrification. The deaeration of the cleaned fluid in the secondary tank 4 ensures the timely

variable stripping of free nitrogen, which excludes secondary pollution of water.

The compact placement of three independent cleaning volumes ensures a stable processing effect.

the bones in the structure are provided by rotating the discs.

Perforated discs provide intensive mixing and turbulization of the flow, which enhances mass transfer processes at the stage of deep removal of contaminants.

Claims (1)

The formula was invented by the device for wastewater treatment, consisting of sections of aerobic treatment of a curvilinear form with biocenosis carriers in a vnde perforated / t-A .2 36206 discs, anaerobic tightness and fluid intake and removal systems, which is aimed at simplifying the design and reducing the cost of cleaning by combining the processes of aerobic and anaerobic treatment of wastewater in one building, the aerobic section 10 cleaning located above the anaerobic capacity with the formation between the walls of the overflow slit, while the sections are coaxially and deployed 180 with respect to one another. 6-6