Sewage pumping station

Sewage pumping station with separation of solids

Wastewater pumping stations with separation of solids are a solution to basic problems in sanitary and combined sewage systems, i.e. clogging of hydraulic systems in sewage infrastructure facilities, clogging of gravity and pressure pipelines, rotting of sewage in retention tanks, blocking or damage of pump impellers due to the presence of solids in the pumped medium and low hydration of the sewage. As a consequence of the above-mentioned phenomena, pumps often malfunction and require servicing or replacement.

Frequent failures generate high operating costs. The use of pumps with very large free passages only partially eliminates the problems discussed, but at the same time increases the amount and therefore the costs of energy used for pumping sewage. Pumps with large passages are unfortunately characterized by relatively low energy efficiency.

Wastewater pumping stations with separation of solids solve all the problems described thanks to their design and in particular the application of a solids separation system, acceleration of sewage rotation in retention tanks, and the use of pumps with narrower hydraulic channels and thus high energy efficiency.



Construction

The TSC sewage pumping station manufactured by Hydro-Vacuum S.A. is a complete, fully automated device, consisting of:
  • retention module with distributor, emergency overflow and inflow and outflow hydraulic system
  • separators of solids:
    • two-channel flaps with separating elements in the form of flexible filtering flaps
    OR
    • Basket type, with separating elements in the form of flexible rods forming a filtering basket
  • high-efficiency FZ-type pumps
  • hydraulic and mechanical attachments
  • shut-off and non-return fittings
  • level sensors - ultrasonic or hydrostatic and float alarm sensors
  • safety and control device type UZS
The retention module together with hydraulic and mechanical equipment, fittings and sensors is installed in a dry tank additionally equipped with such elements as, among others: ladder, supply-exhaust ventilation system with a duct fan, lighting, drainage installation with a FZ drainage pump.

Advantages of sewage pumping stations:


  • Pump protection - thanks to the use of a solids separation system, complete elimination of clogging and blocking of pumps with solids contained in sewage
  • Reducing the occurrence of emergencies and the number of interventions by employees operating the facility
  • Comfortable operation - installation of the retention module of the pumping station with separation of solids in a dry external body with the possibility of access to its interior during operation of the device
  • Possibility of continuous operation of the device even in the event of probe and/or controller failure - additional alarm sensors
  • Possibility of using pumps with smaller free passages, lower power and higher efficiency = lower energy consumption of wastewater transport
  • Lower operating costs - reduction of energy consumption costs (high-efficiency pumps), minimization of the number of visits to the facility (reduction of failure states), elimination of damage to the elements of pump construction and hydraulic system – elimination of spare parts costs
  • High comfort of work for service technicians and operators by limiting direct contact with sewage as much as possible
  • Construction developed by engineers from the Research and Development Department of Hydro-Vacuum S.A.
  • The pumping station with separation of solids has patents of the Polish and European patent offices
  • The pumping stations are equipped with award and medal winning high-efficiency FZ-type pumps manufactured by Hydro-Vacuum S.A.
  • Polish-made product - all manufactured in the parent factory of Hydro-Vacuum S.A. in Grudziądz, comprehensiveness of realization by Hydro-Vacuum S.A - selection, production, delivery and assembly of the device as well as after-sales support (technical and service)

Savings

  • Lower electricity consumption – higher efficiency pumps
  • Reduction of costs due to service interventions - less frequent visits to the facility
  • Elimination of spare parts costs - removal of causes of failure of pumps working with wastewater medium
  • reduced cost of replacing components - longer life of equipment components due to materials used - no corrosion

Technical Data

Type Sewage inflow rate Diameter of the discharge pipeline Num. of pumps Retention capacity Pumps type Min. tank diameter
m3/h mm pcs. m3 mm
TSC* 4-400 80-250 2-8 0,1-11,0 FZ.2-FZ.8 1500-5500**
* on individual request the possibility to make a compressor station with parameters exceeding the standard series of types
**depending on the type size of the TSC compressor station - there are 16 types of compressor station sizes available in the standard series

Pumps

The sewage pumping station with separation of solids is equipped with alternately operating FZ pumps with a highly efficient hydraulic system and a reliable drive transmission system. The wastewater pumping stations manufactured by Hydro-Vacuum S.A. can use pumps with channel impellers with high-efficiency electric motors in the IP68 version (the motor can operate in dry and submerged conditions). FZ pumps are equipped with protection in the form of built-in thermal and humidity sensors. The multitude of available types and sizes of FZ pumps allows for the optimal selection of pumps to suit the investment conditions and the customer's needs.

Module and fittings

Retention module of the wastewater pumping station with separation of solids, solids separators and all elements of the piping are made of stainless steel with high corrosion resistance. Other elements of hydraulic equipment, i.e. non-return valves and shut-off valves are also made of materials intended for use in sanitary sewage. The design of the sewage pumping station uses non-return valves to ensure reliable operation and effective transport of wastewater containing solids. These valves comply with applicable requirements and have the CE marking for compliance with the PN-EN 12050-4 standard.

It is possible to equip the pumping station module with an additional mixing pump to prevent deposition of minor, easily sedimentable particles at the bottom of the retention module and their efficient pumping out to the discharge collection pipeline. The pumping station with separation of solids may be additionally equipped with a sewage aeration system and/or installation for dosing chemicals (coagulants) to reduce anaerobic processes and neutralization of toxic substances generated in sanitary sewage.

Control


The operation of the sewage pumping station with separation of solids is fully automatic using a set of control devices, i.e. a safety and control device and liquid level sensors.

Safety and control devices manufactured by Hydro-Vacuum S.A. are additionally fitted with acoustic and optical signalling of alarm states.

The possibility of ongoing supervision and management of the operation of the sewage pumping station with separation of solids is achieved by including the pumping station in a remote monitoring system and comprehensive remote management and supervision over the operation of water and sewage infrastructure devices.

Certificates

The TSC sewage pumping station with separation of solids has a Declaration of Performance and CE marking for compliance with the harmonized standard PN-EN 12050-1:2002.

This standard applies only to wastewater pumping stations with separation of solids intended for discharging sewage from places in buildings and their surroundings, located below the flood level to protect buildings and their surroundings against reverse flow.

For all other applications and locations of wastewater pumping stations with separation of solids, national regulations arising from the Act on Construction Products dated 16 April 2004 shall apply Therefore, the TSC wastewater pumping station with separation of solids also has a National Declaration of Performance and marking with a construction sign for compliance with the National Technical


Pumping stations equipped with two-channel tilt flap separators

Principle of operation

In a classic (wet) pumping station, wastewater fed by gravity sewer flows directly into a retention tank. In pumping stations with solids separation, wastewater flows into a pumping tank located in a dry chamber, and is then distributed to individual separators. From the separators, the treated wastewater devoid of solids, sludge and trailing elements flows by gravity through the hydraulic elements of the pumps into the pumping station tank. When any of the pumps is running, the wastewater flows only to the separator connected to the non-working pump. The set sewage levels in the compressor station tank are controlled by means of an ultrasonic meter (other types of sensors can be used as an option). After receiving a signal that the set sewage levels in the tank have been reached, the protection-control device starts or stops the relevant pumps. The activated pump sucks the treated sewage and forces it into the separator located in the axis of the pump's discharge port. The energy of the pumped wastewater stream entrains the solids in the separator, directing them into the pumping station's discharge pipeline. The overpressure created during pumping closes the wastewater return flow to the pumping station tank. During the pump cycle, wastewater flows into the tank through the second separator and the hydraulic system of the non-working pump. When the lower preset level of wastewater in the tank is reached, the pump is automatically turned off. The design of the separator (a system of specially shaped rod basket) means that the pumping station can operate continuously without requiring additional operations to remove accumulated pollutants. During each pump start-up the separator is "self-cleaning". The hydraulic system of the pumps, which does not have direct contact with solids, and in particular with dragged solids, is not exposed to clogging.

Filling stage

Pumping stage

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