CZ287978B6 - Plant for waste water disposal - Google Patents

Abstract

In the present invention there is disclosed a waste water disposal plant consisting of waste water treatment plants being connected to local sources of waste water, where a tank (4) of treated water with a pump (5) for pumping purified water into a pressurized branch (9) and further to a collecting piping (11) being provided with a central checking place (12) and leading out in a recipient forms an integral part of each domestic sewage plant (3). The pressurized branch (9) is provided in front of connection to the collecting piping with a ground closing fitting (10). The purified water tank (4) can be represented by an existing cleaned up cesspool, respectively a septic tank.

Description

Waste water disposal equipment

Technical field

The invention relates to a device for the disposal of waste water, i.e. waste water treatment and removal of purified waste water from local sources of pollution in residential settlements with scattered installation into the recipient.

BACKGROUND OF THE INVENTION

At present, the most widespread way of wastewater disposal is its concentration to the central wastewater treatment plant by gravity or pressure sewerage. Given the geography of the site, it is sometimes necessary to combine gravity sewerage with pumped storage.

The most commonly used system of gravity sewerage is uniform, including rainwater and / or sewerage, only for sewage water. These systems are reliable and simple. Since the cost of sewage systems usually exceeds many times the costs of central sewage treatment plants, this system is only profitable in towns and settlements with densified buildings, where a sufficient number of inhabitants is connected to the unit length of the sewage pipes. For applications in older scattered buildings in municipalities up to 1000 inhabitants, the system of gravity sewerage is practically not feasible from the point of view of return on investment.

For planar areas a system of vacuum and pressure sewerage is used. The principle of vacuum sewerage is that for each property or group of properties a special manhole is set up, from which the sewage is automatically sucked into the central sewerage system after its filling. The advantage of this solution lies in lower piping costs - 80 to 100 mm profiles are used, which are stored at depths of about 1 m and can follow the terrain. This system is often used in protection zones of water sources because it is safe against leakage of wastewater into groundwater. The main disadvantage of this system is the high price of the vacuum station at the central sewage treatment plant, which reaches the costs of the sewage treatment plant in municipalities up to 1000 inhabitants.

The pressure sewer system differs from the vacuum sewer system in that each property or group of properties has a wastewater pumping station with grinding pumps. The sewage is crushed and subsequently transported under high pressure to the central sewage treatment plant. The advantage of this system lies in the small profiles of the transport piping - approx. This significantly reduces the cost of piping. The disadvantage is the operating demands on the grinding pumps and all fittings in the system for the transport of raw waste water. If the manifold fails, the system is difficult to control.

Occasionally, a system of local domestic wastewater treatment plants is used for individual properties. This system is the cheapest, because the cost of the treatment plant per house, i.e. up to 5 inhabitants, is similar to the cost of the intake shaft respectively. pump shaft in vacuum system resp. sewerage and drainage costs. However, the problem arises with the disposal of purified waste water. A permit to seep into groundwater requires a water decision, which requires an opinion of a hydrogeologist. Larger quantities of local domestic sewage treatment plants are not usually allowed, as their operation is difficult to control. Otherwise, the treated waste water must be conveyed to the public watercourse in a waterproof manner. The existing rainwater sewer system usually does not meet this requirement.

The last and most commonly used method of wastewater disposal in villages is their accumulation in wells for balancing. Because balancing is very expensive,

Sewage is often discharged into surface water or groundwater, or is illegally pumped into rainwater sewer.

The essence of the technical solution

The aforementioned drawbacks are eliminated by a wastewater treatment plant comprising wastewater treatment plants connected to the local wastewater sources according to the invention, which consists in that each domestic wastewater treatment plant comprises a waste water tank 10 with a pump for pumping the purified water to a pressurized water. connection and then into the collecting pipe leading to the recipient. The collecting pipe is equipped with a central control point before it reaches the recipient.

The aforementioned device enables simple and inexpensive disposal of waste water, in particular in a dispersed installation, where in terms of investment costs it is usually the only possible solution. As a result, it has a significant environmental benefit by offering an affordable alternative that avoids unecological wastewater management.

BRIEF DESCRIPTION OF THE DRAWINGS

In the accompanying drawings, FIG. 1 shows one possible embodiment of the device according to the invention, and FIG. 2 shows a schematic section of the connection of the property to the central discharge of purified water.

DETAILED DESCRIPTION OF THE INVENTION

A sewage source 1 is connected to the domestic waste water treatment plant 3, which represents the property in the local scattered development. An essential part of the domestic waste water treatment plant 3 is a reservoir 4 of treated water. This can also consist of an existing cesspool or septic tank, which is cleaned before. The domestic sewage treatment plant 3 can then be installed in front of this cesspool. septic tank, or even into it respectively. into it. The purified water tank 4 is provided with a purified water pump 5, which flows through a pressure connection 9 into a collecting pipe 11 and further into a recipient 14.

A non-return flap 6 is provided on the pump outlet pipe 5 to prevent backflow 35 of purified water from the manifold 11 and a shut-off valve 7. A tap 8 is provided in front of the shut-off valve 7, resulting in a given private plot. Purified water can then be used, for example, during the growing season for watering. The pressure connection 9 is provided with a ground shut-off fitting 10 situated on a public land. This fitting 10 serves to disconnect the waste water source 1 from the manifold 11 in case the water quality flowing through this pressure connection 9 does not comply with the water permit. Before the collecting line 11 enters the receiver 14, a central control point 12 is established to check the quality of the purified water.

Since already purified water flows through the pressure connections 9 without any mechanical impurities, the diameters of these pressure connections 9 and the manifold 11 can be small. These diameters are only dimensioned for the average daily amount due to the presence of the purified water reservoirs 4. With regard to the profiles used, all pipes can be laid cheaply, trenchless.

The waste water flows from the waste water source 1 via gravity sewer connection 2 to the domestic waste water treatment plant 3. Here, coarse impurities are trapped and subsequently the waste water is treated. These then flow into the purified water tank 4. After the container 4 has been filled to the specified level, the purified water pump 5 is switched on and pumped the contents of the container 4 into the manifold 11 and thus into the recipient 14. The switching of the pump 5 can be controlled by a float or other 55.

Claims (3)

PATENT CLAIMS Wastewater disposal plant, comprising sewage treatment plants connected to local wastewater sources, characterized in that the domestic wastewater treatment plant (3) comprises a wastewater storage tank (4) with a pump (5) for pumping the purified water to a pressure tank connection (9) and further into a manifold (11) provided with a central control point (12) and flowing into the recipient (14). Waste water disposal device according to claim 1, characterized in that the pressure connection (9) is provided with a ground shut-off fitting (10) before being connected to the manifold (11). Waste water disposal device according to claims 1 and 2, characterized in that the treated water reservoir (4) is formed by an existing cleaned sump or drain. septic tank.