DE3145797A1 - Biological waste water (effluent) purification apparatus - Google Patents

Abstract

In a biological waste water (effluent) purification apparatus, the waste water is fed in with vacuum suction by means of a liquid jet pump which is driven by a works water pump. A buffer tank into which the waste water is first fed and which is connected to the suction side of the liquid jet pump is arranged in such a way that there is a vacuum cushion in the buffer tank.

Description

Device for biological

Wastewater treatment The invention relates to an apparatus for biological wastewater treatment, especially for ships, in which the wastewater is sucked into a collecting container by means of vacuum, with a motive water pump is connected with its suction side to the collecting tank, while its pressure side is connected to a pump for vacuum generation and when using a liquid jet pump the outlet is designed as a diffuser and opens into the collecting container.

Devices of this type using motive water pumps are known and found in sanitary systems with toilets and waste water collection points Application that can be emptied with vacuum. The particular advantage of a vacuum sanitary system lies in that low water consumption of the toilet due to low Rinsing water quantities and when creating the pipe system with relatively small pipe cross-sections. In addition, it is not necessary to provide a gradient in the pipe system.

The shortcoming in the known arrangements is that a biological Reduction of the pollution load of the wastewater in the vacuum area is not possible and furthermore with a simultaneous or multiple consecutive use of Toilets and / or sewage collection points arise because of the pollution load can no longer be discharged through the existing vacuum and thus blockages enter.

The object of the invention is to provide a sufficient in a simple manner Vacuum for multiple use of toilets and / or waste water collection points create and at the same time ensure a good aerobic breakdown of the pollution.

This object is achieved according to the invention in that the Suction connection of a vacuum pump connected to a buffer tank via a suction pipe which is connected to the waste water supply and the suction pipe for receiving of the wastewater is led into the buffer tank.

This makes it possible to provide a large vacuum buffer and so that the multiple use is functionally taken into account in order to avoid deposits to be avoided in the pipe system. Furthermore, that which collects at the bottom of the buffer tank Wastewater is constantly sucked out at the same time as the air.

An advantageous arrangement is created in that the vacuum pump as a liquid jet pump is trained. It becomes the aerobic degradation of the dirt load is supported significantly, since the in the vacuum system sucked air in the diffuser of the liquid jet pump intimately and effectively with mixed with the sewage. Due to the fine distribution and the large contact area carbon dioxide is expelled between the air and waste water and the pH value increases.

In order to guarantee a good function even in inclined positions and a To enable a large vacuum cushion, it is proposed that the suction tube be in the lower area of the buffer tank is guided.

It is also provided that the buffer tank has a vacuum control valve having. As a result, a corresponding required negative pressure is between 30 and 50 kPa adjustable.

In order to ensure a good breakdown of the pollution load, it is proposed that the collecting tank be a multi-chamber sewage treatment plant with a collecting tank, Ventilation and mixing tank, settling tank and disinfection tank is formed, wherein the diffuser of the liquid jet pump to the collecting tank and the suction side sender Treibwaaserpumpen is connected to the aeration and mixing tank of the sewage treatment plant. Here, organic pollutants, mainly compounds, are deposited in the aeration mixing tank from hydrogen, carbon and sulfur through aerobic bacteria to carbon dioxide and water degraded. In the settling tank, the bacteria flocculate and are then more revitalized Sludge to be fed to the collection tank. The cleaned wastewater then enters over the disinfection tank and is discharged.

In the drawing, an embodiment of the invention is with a Multi-chamber sewage treatment plant and one Liquid jet pump schematically shown.

The wastewater generated is from toilets 1 and wastewater collection points 2, which are designed for vacuum operation, via a sewer line 3 and a buffer tank 4 is supplied. The collection point 2 is here with supplies of bathtubs, Wash basins and shower trays 5 connected.

The resulting waste water is a multi-chamber sewage treatment plant 6 with individual Tanks 7,8,9 and 10 fed.

For this purpose, motive water pumps 11, 12, which are connected to the ventilation and mixing tank 8 are connected via a line 13, water supplied to the Pressure sides of the motive water pumps 11, 12 via a line 14 to a liquid jet pump 15 is performed.

When the water flows through the liquid jet pump 15 a vacuum is generated in the buffer tank 4 via a suction pipe 16, the liquid jet pump 15 is guided with its outlet as a diffuser in the collection tank 7 of the sewage treatment plant. The waste water / air mixture is thereby drawn out of the buffer tank 4 via the suction pipe 16 Sucked off by means of the suction of the liquid jet pump 15 and in the diffuser additionally mixed with air so that a partial clarification takes place in a known manner.

The buffer tank 4 is connected to a vacuum control valve 17, to supply air and maintain a predetermined vacuum.

When emptying the toilets 1 and the collecting tank 2 is over the sewage line 3 through the vacuum formed, the sewage into the buffer tank 4 including the air sucked. As the one held ready vacuum is relatively large in the buffer tank 4, there is a sufficient one even with multiple use Vacuum is available to maintain the functionality of the sewage system.

The multi-chamber sewage treatment plant 6 is operated in the usual way and can be emptied using a pump.

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Claims (5)

Claims w. w 1. device for biological wastewater treatment, especially for ships where the wastewater is vacuumed into a collecting tank is sucked off, with a motive water pump with its suction side on the collecting tank is connected, while its pressure side is connected to a pump for vacuum generation and when using a liquid jet pump, the outlet is designed as a diffuser and opens into the collecting container, characterized in that the suction connection is a Vacuum pump (15) connected to a buffer tank (4) via a suction pipe (16) is, which is connected to the waste water supply (3) and the suction pipe (16) for The waste water is taken up to the buffer tank (4). 2. Apparatus according to claim 1, characterized in that the vacuum pump is designed as a liquid jet pump (15). 3. Apparatus according to claim 1 and 2, characterized in that the suction pipe (i6) is led into the lower area of the buffer tank (4). 4. Apparatus according to claim 1 to 3, characterized in that the buffer tank (4) has a vacuum control valve (17). 5. Apparatus according to claim 1 to 4, characterized in that the collecting tank as a multi-chamber sewage treatment plant (6) with collecting tank (7), ventilation and Mixing tank (8), settling tank (9) and disinfection tank (10) is formed, the Diffuser of the liquid jet pump (ins) to the collecting tank (7) and the suction side sender Motive water pumps (11, 12) to the aeration and mixing tank (8) of the sewage treatment plant (6) connected.