SU1634647A2 - Aeration tank - Google Patents

Abstract

The invention relates to the biological treatment of wastewater Pel of the invention — an increase in the oxidative capacity of the aerotank and a reduction in energy consumption due to an increase in the processes of aeration efficiency and regeneration of active ice directly in the aerofoil. To do this, equip the aerogenic with low-pressure aerators placed above the aeration tank near the mixing devices, each of which is designed as a tray with a pocket, combined with an overflow threshold. horizontally flattened sockets, located directly above the bottom of the tray. In the tray, a branch from the air duct with tubular distribution is installed. air at a depth that allows air to be supplied to them using low-pressure fans, and the outlet of the aerated sludge pipe is located in the zone of intensive mixing of activated sludge, treated and source waste liquid. The invention eliminates the construction of a separate regenerator of active sludge with additional consumption energy consumption for pumping sludge mixture 4 or „1 (L

Description

The invention relates to the biological treatment of domestic and organic-containing industrial wastewater in aerotanko

The purpose of the invention is to increase the oxidative capacity of the aerotank and reduce energy consumption to increase the efficiency of aeration and regeneration of activated sludge directly into the aeration tank.

Fig "1 shows the aeration tank in the plan with the placement of low-pressure aerators and mixing devices; Fig. 2 is a section A-A in Fig. I, indicating the location of the low-pressure aerator; Fig. 3 shows a low-pressure aerator in plan showing the location of the distribution pipes of the sludge mixture and compressed air; FIG. L is a section BB, 3, indicating the supply of a sludge mixture of compressed air distribution.

The aerotank contains branches 1 from the discharge pipe of the sludge mixture with nozzles 2, evenly spaced along the entire length of tray 3, fitted with horizontally arranged openings at the outlets

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4, made flattened, preventing sedimentation of sludge by continuous vzmuchivanie, branches 5 from the air duct with perforated pipes 6, located at a depth of 20-25 cm from the level of liquid in the tray, pocket 7 with overflow threshold 8, providing stabilization of the level of liquid in the channel at a predetermined height, a pipeline 9 for draining aerated liquid from the pocket to the compartment 10 of mixing the activated sludge with the treated liquid and supplying the initial wastewater. Plates II serve as supports 15 for aerators and at the same time for mixing devices, while plates 12 on the other side of mixing devices are reserved for the installation of additional aerators in 20 cases of increasing the concentration of organic pollutants in the source effluent0

Aerotenk works as follows,

By branch 1 from the discharge pipe of the sludge pipeline, part of it through pipes 2 with horizontally flattened sockets 4 enters each tray 3 mounted on support plate II, in which, simultaneously with the supply of whose sludge mixture, the last stirring up of the latter, prep sludge deposition0 At the same time as the sludge mixture is fed along the branches

5from an air duct with a pressure of low- 35 pressure fans supply compressed air, which through perforated pipes

6 is evenly distributed in the upper layer of the sludge mixture, and the aerated mixture over the threshold 8 is poured into pocket 0, from which pipe 9 enters compartment 10 for mixing

with the treated liquid, as well as with the source liquid entering the aerotank.

In the event of a significant increase in the concentration of organic pollutants in the source fluid, requiring

increasing dissolved oxygen, additional low-pressure aerators with a similar piping system are installed on the backup plate 12,

Claims (1)

The aerotank has the following advantages: it eliminates the need to build a separate activated sludge regenerator with the consumption of additional power consumption for pumping the sludge mixture; it is possible to supply an unlimited amount of dissolved oxygen in the aeration tank with an insignificant consumption of electricity. Aerotank of avtssv0 No. 1444305, distinguished by the fact that, in order to increase the oxidative capacity of the aerotank and reduce energy consumption by increasing the efficiency of aeration and regeneration of activated sludge directly in the aerofoam, , each of which is made in the form of a tray with an overflow threshold, a pocket with a sludge feed pipe with nozzles evenly placed along the entire length of the tray, the outlet openings of which are provided horizontally located above the bottom of the tray with sockets, and an air line connected to the air supply pipeline from low-pressure fans with tubular air distributors located below the surface of the sludge mixture in the tray, while the tray is equipped with a vertical pipeline to drain aerated sludge mixture near hollow columns of mixing devices, and The supply line for the sludge-7 mixture is connected to the pipeline for supplying the mixture of activated sludge with clarified water to the aerotank L g “Ir . sT 4D f m Ј "V  5 foi eight- with b WITH about -I at- K5 vl 0 ABOUT 12. 6- b Fy