ITVE20090026A1 - SEWERAGE SYSTEM.- - Google Patents

Description

DESCRIPTION

of the invention entitled:

"Sewer system"

The present invention relates to a sewer system.

The use of gravity sewage systems with separate networks (rain and black) is known for collecting wastewater produced by individual users and sending them to final delivery.

The operating principle of this sewage system is based on the need to ensure a suitable slope to a pipeline with a sufficiently large diameter (minimum 160 mm) that allows the gravity flow of both the waste water and the solid and sedimentable materials contained therein. This system is used because, in the face of significant construction costs, it allows the waste to be conveyed with reduced management costs.

However, some environmental situations, such as isolated inhabited centers, historic city centers, the presence of surface water table and rocky soils or with highly variable altimetric profiles, do not allow the construction of a gravity sewer except at economically unsustainable costs, in as this system has some drawbacks and in particular:

- high excavation and restoration costs, related to the laying of large diameter pipes, and with significant excavation depths, especially in areas of historical interest with valuable flooring or where the use of machinery is not possible;

- the difficulty in making the necessary slopes no more than a certain level of excavation and therefore the need for lifting systems;

- the possibility of finding underground services (electric cables, telephone cables, etc.), an obstacle to laying the sewer pipe with consequent crossing problems;

- the need to install expensive and bulky inspection and control chambers every 50-60 m of main collector;

- the presence of solid bodies throughout the system that can cause clogging and blocking of the lifting pumps;

- the possibility of infiltration of rainwater and groundwater within the system through the joints and inspection wells thus increasing the difficulties and costs of the final treatment.

According to the invention, all these drawbacks are eliminated with a sewage system characterized by the fact of comprising a plurality of septic tanks with at least two compartments inside which the wastewater is clarified, said compartments being connected to each other by means of a siphon, the last compartment housing a high pressure lifting pump, connected to a pipe with a diameter of less than 2 ”headed by the main manifold under pressure or gravity.

The present invention is further clarified hereinafter in a preferred embodiment thereof reported for purely illustrative and non-limiting purposes with reference to the attached drawings in which:

Figure 1 shows a schematic perspective view of a sewer system according to the invention,

figure 2 shows in longitudinal section a septic tank and its pumping system to the main sewer system, and

Figure 3 shows a schematic section of the anti-backflow protection system towards the emergency drain.

As can be seen from the figures, the sewer system according to the invention substantially comprises a plurality of septic tanks 2 fed by a duct 4 for the arrival of black and blond water produced by various users and from which a pipe 6 with a diameter of about 1 branch off. ”For connection to the sewage manifold 8 under pressure (with a maximum diameter of 3” - 4 ”) which transfers them to the treatment plant or to an existing gravity manifold.

In particular, each pit 2 is divided into three chambers 10, 12 and 14 respectively, each provided with inspection covers 16 and connected to each other by siphon pipes 18 in order to provide for the separation of three phases inside them: foams, clarified and mud.

The third chamber 14 also houses a lifting device 20 operated by a level switch system 22 (piezoresistive or float) which sends the clarified water contained therein to a duct 24 with a preferably 1 "diameter for discharge to the sewer collector. under pressure. The same level switch also signals alarms for abnormal levels inside the pit.

Said conduit 24 is also provided with a check valve 26 and an interception valve 28.

The invention also includes a remote control system 30 realized in telemetry so as to verify moment by moment the significant operating parameters such as the levels, operating status of the pumps, number of starts and to alert the service personnel via sms and / or email, in case of failures or exceeding of alarm levels.

The system will also periodically send significant operating data (pump operating cycles, level changes within the third compartment of the tanks) which will be recorded on a centralized server. Any malfunctions due, for example, to excessive duration of the unloading cycle and a constant level of the lifting tank will be reported to the control personnel by comparing the data recorded with those already acquired in the past.

An emergency drainage duct 32 also branches off from the third chamber 14, equipped with a pump 34 with backflow protection.

From what has been said it is clear that the sewerage system, according to the invention, thanks to the possibility of discharging the water under pressure and by means of a pipe having a smaller diameter than that of the pipes necessary for gravity systems, has numerous advantages and in particular:

- a constructive simplicity,

- a reduction in construction costs relating to excavations and restorations,

- the possibility of positioning the pipes with the pipe pusher technique without having to tamper with the road pavement,

- the possibility of completely decommissioning any existing mixed sewerage system, using it as a rainwater collection network, eliminating a significant maintenance cost,

- the possibility of traveling long stretches with zero or positive slopes, eliminating the problem of excavation depth, and the presence of existing underground utilities with the possibility of deciding the best feasible route during construction,

- the elimination of inspection and control wells of the network to be placed on public land,

- the absence of solid bodies inside the system as they are sedimented and collected inside the septic tanks, preserving both the main network and the lifting pumps from clogging,

- the elimination of groundwater and surface water infiltration within the pressurized sewerage system by locating any anomalous entrances at the level of the septic tank,

- the possibility of crossing canals and bridges by connecting the various areas together by means of pipes placed on the points and / or bottoms of waterways,

- reduced energy consumption,

- a reduction in inconvenience to the population involved in the construction of the new sewer networks,

- the possibility of having an emergency drain manned by an anti-backflow system that avoids the entry of parasitic water into the main sewer system and allows in any emergency situation the expulsion of the waste water produced without causing flooding to the user.

The present invention has been illustrated and described in a preferred embodiment thereof, but it is understood that executive variations may be applied to it in practice, without however departing from the scope of protection of the present patent for industrial invention.

Claims (6)

R I V E N D I C A C IO N I 1. Sewerage system characterized by the fact of comprising a plurality of septic tanks (2) with at least two compartments (10,16) within which the effluent produced is clarified, said compartments being connected to each other by means of a siphon (18), the last compartment (16) housing a high pressure lifting pump (20), connected to a pipe (24) with a diameter of less than 2 ”leading to the main manifold under pressure or gravity. 2. System according to claim 1 characterized in that the pipe (22) has a diameter between 1 "and 2". 3. System according to claim 1 characterized in that said pipe (24) is provided with check valves (26) and with shut-off valve (28). System according to claim 1 characterized in that the pump (20) is operated by a level switch system (22). 5. System according to claim 1 characterized in that the septic tank is further equipped with an emergency drain (32) provided with a pump (34) and a non-return valve. 6. Sewer system according to claims 1 to 5 and substantially as illustrated and described.