LT4786B - Filtering system for treatment of waste water - Google Patents

Abstract

The invention is in the field of agriculture and ecology and can be applied in discharge cleaning. The sand and reed filtering system consists of a hollow (1), covered with screen (2), discharge dispensing pipes (3), covered with a layer (4) of gravel and chippings, covered with polystyrene (5). The reed (7) planted in the sand hollow (6) and assembled discharge control well (8) that consists of the siphon (9), connected with the outpour level regulator (10) and the downpour pipe (11) going into the well (12). The downpour pipe (11) is connected to the tank (14), which in turn is connected to the lever (15) and valve (16) at the end of the collection pipe (17). When discharge in the well (8) lift the level regulator (10) to reach the maximum programmed height, the siphon (9) pours discharge through the pipe (11) into the debit regulatory tank (14). As soon as the tank (14) is filled to capacity, its weight increases and the lever (15) opens the valve (16) and remains open until the level of discharge in the well (8) falls down to the minimum programmed by the level regulator (10), then the siphon (9) closes and the supply into the tank (14) stops. The regulatory tank (14) is emptied through the vent (18), it becomes lighter and the lever (15) closes the valve (16). The discharge filtering process starts from the beginning.

Description

The invention relates to the field of agriculture and environmental protection and can be used in wastewater treatment.

Known device for biological treatment of wastewater, consisting of a housing containing corrugated plates with openings for filtration of wastewater and enrichment with air in the air (USSR a.l.No.170868 class85 C 02F3 / 00.1965).

The disadvantage of this unit is that the unit does not completely purify the wastewater and the intensity of the treatment is not controlled.

Wastewater irrigated agricultural field is known, consisting of an isolated filtration field filled with a mixture of sand and peat and located between the irrigation and drainage channels (USSR a.l. No. 929592 class C02F 3 / 00,1980).

The disadvantage of this irrigation field is that it requires special terrain conditions and large areas of irrigation fields for efficient wastewater treatment.

The closest technical solution of the present invention is a system of sewage filtration through a sand-reed filter described by Conley Lucy M., Diek Richard I., Lion W. An Assessment of the Root Zone Method of Wasterwater Treatment. May / June 1991. pp. 239-247).

In this sand and reed filter, the wastewater treatment process involves a complex of physical, biological and chemical reactions. The supply of oxygen to the sand-reed filter is known to improve the wastewater treatment process. In order to create good aerobic and anaerobic conditions that improve wastewater treatment, the sand-reed filter does not solve wastewater level regulation and filter saturation with air oxygen.

The object of the invention is to improve the efficiency of wastewater treatment by regulating the aeration mode in the sand-reed filter.

This purpose is achieved by installing a sewage level control manhole in the sand and reed filter, fitted with a siphon, which is connected flexibly to the discharge regulator tank, mounted in the outflow manifold and connected to a valve located in the manifold. In addition, a drainage height regulator is installed in the wastewater level control well, and the drainage capacity of the flow regulator installed in the outflow well is smaller than the diameter of the drainage pipe.

A schematic diagram of the wastewater filtration system is shown in the following drawing:

Fig. 1 is a side view of the system;

Fig.2 - Plan view.

The wastewater filtration system consists of a pit 1 covered by a screen 2, a manifold 3 filled with a gravel-crush layer 4 and covered with a polystyrene cover 5. The pit 1 is filled with sand 6 with reed beds 7. The pit 1 is equipped with a sewage level control well 8 a siphon 9 mounted inside the well 8, connected to a discharge height regulator 10 and a discharge pipe 11 introduced into the outflow well 12. The discharge pipe 11 is connected by a flexible part 13 to a flow control vessel 14 which is connected to a valve 16 by a lever 15, mounted at the end of the manifold 17 introduced into the outflow well 12. A portion 17 of the pipe 17 in the excavation is filled with a gravel-crush layer 4. A lower opening 18 is provided at the bottom of the flow control vessel 14.

The wastewater filtration system works this way.

The waste water is absorbed by the sand when it is continuously fed to the manifold 3

6. When the level of filtered wastewater in the control well 8 reaches the Hmax level of the discharge regulator 10, the siphon 9 is activated and the drainage pipe 11 flows into the flow regulator tank 14. When the tank 14 is filled, the weight increases and lever 15 opens the valve 16 The valve 16 is kept open and the waste water from the collecting pipe 17 flows until the waste water level in the control well 8 reaches the minimum level H min- Then the siphon 9 shuts down and no longer flows into the flow regulator tank 14. After emptying the tank 14 through the drain 18 its weight, lever 15 closes valve 16, and the process of filling the wastewater filtration system automatically repeats.

Claims (2)

DEFINITION OF INVENTION 1. A wastewater filtration system comprising a manifold, screen, polystyrene coating, gravel-rubble prism, grit, reeds and a manifold connected to an outflow well, characterized in that the well is equipped with a wastewater level control well a siphon connected to a drainage pipe fitted with a discharge regulator tank, connected by a lever to a manifold mounted in the manifold. 2. A wastewater filtration system according to claim 1, characterized in that the control well of the wastewater level control is provided with a drain height regulator and the diameter of the drain opening of the flow regulator installed in the outflow well is smaller than the diameter of the drain pipe.