A vacuum station (VS) functions as a transition point between a vacuum collection network and a forcemain leading directly or indirectly to a treatment facility. The wastewater from the vacuum mains is discharged into the collection tank which is a sealed, vacuum-tight vessel made of special coated steel or stainless steel to avoid local corrosion. Vacuum gauges are used on all incoming lines to allow the operator to monitor the vacuum levels of each vacuum main.
The bottom portion of the tank acts as the wet well. Wastewater is stored here until a sufficient volume accumulates, at which point the tank is evacuated by the discharge pumps. The discharge pumps are typically non-clog, suitable for sewage and slurry applications, submerged or dry-mounted pumps (depending of the installation). Redundancy is required, with each pump capable of providing 100% of the design capacity. How it works
Vacuum, produced by the vacuum pumps, is transferred to the vacuum mains through the top part of the tank. Vacuum pumps typically are rotary vane or liquid ring type. Redundancy is required, as design capacity must be met with one pump out of service.
As a result of airborne H2S in the vacuum pump discharge, odour may be a concern at the position of the vacuum station. In those cases various methods for controlling odour (e.g.: Biofilter, activated carbon filter, etc.) can be used.
The control panel of the station consisting of contactors, starters, switches, touch screen panel, terminal boards, and wiring to control and interlock contacts for operation of discharge pumps and vacuum pumps. A touch panel is used for setting up the parameters and overviewing of the functions (HMI). The collection tank level control and fault monitoring equipment are also normally located within the vacuum system control panel.
The chamber monitoring system facilitates a reliable control of the operation of collection chambers, in a vacuum sewage system. The collection chamber monitoring system reduces the time involved during routine controls and simplifies trouble shooting. It facilitates minimization of time in case of clogging inside the collection chamber and reports the consequent congestion inside the inlet pipe. In addition, the chamber monitoring modules are provided with a self-controlling function. If a permanently occurring signal is interrupted due to a fault, a failure message for the respective chamber is reported.
The new UW-Tech’s Containerized Vacuum Pumping Station
UW-Tech provides a wide range of containerized Vacuum Pumping Stations (UW-VS) depending of the project requirements. This unit is the main treatment part of an integrated Sewage Vacuum Network.
All models can be transported by standard road-trucks or shipped inside ISO container in order to reach even the most distant and remote part of the world. This fact makes our solution the easiest and fastest way to implement a vacuum station at any terrain and under any condition. Furthermore, can be equipped with Anti-frost pack (includes frost protection, heated engine-room, insulated and top-closed tanks). Standard in all models, the engine-room includes lockable doors for security reasons.
- Easy and low cost transportation all over the world
- Easy installation (only a concrete base is required)
- Minimum time for the plant implementation and quick system start-up
- Very small footprint
- Easy to be operated and maintained
- Low operating cost
- Fully automated system with PLC that could be monitored either locally through cable network or radiomodem (Wi-Fi, Ethernet) or globally though internet (ADSL, GPRS/3G, Satellite). In all models a colored touch screen is included.
- Tested in-house before the delivery
- Attractive price
Guidelines for design and operation of vacuum sewer systems are given by the technical norms:
EN 1091 (European Standard)
DWA-A 116-1 (German Standard)
EPA/625/1-91/024 (US Standard)