The wastewater lift station in municipal facilities is outdated. The pumps are coming to the end of their service life span, the controls require modernization and the access hatch has deteriorated. However, the concrete wet well is solid and sturdy.
Image credit: romtecutilities.com
Do you think the station should be destroyed and rebuilt? Not necessarily. It is better to ask if the infrastructure already in place is capable of supporting the modern pumping system without compromising future capacity in terms of reliability, reliability, or access.
Retrofitting a pump station can be a fantastic way to preserve infrastructure, and also replace parts that are no longer functioning.
Start with the structure isn’t being replaced by anyone.
The wet well is typically one of the more expensive and challenging components to replace because it is buried, connected to existing piping, and vital to the process of removing wastewater.
Retaining the concrete structure could help in reducing excavation work and construction.
However, the deterioration of the access hatch can complicate the process. Romtec Utilities identifies wet well hatch replacement as a common retrofit requirement. Instead of affixing a new hatch to the deteriorated concrete, replacing the entire top slab may be a better option. This can increase access to the structure, and extend its use, without the need to completely rebuild the wet well.
The design of the pump with more power is distinct
Imagine a neighborhood that has exploded in size since the initial lift station was constructed. The current pumps may not be able to cope with the increased flow of wastewater.
An upgrade to the pumping station could involve higher-horsepower pumps, but equipment selection isn’t a part from the rest of the system. To make the pumps more powerful you might need to make changes to the discharge elbows or pipe. It is also possible to upgrade electrical controls and valves.
Engineers should also evaluate the requirements for hydraulics of the system, which includes the rate of flow as well as dynamic head total. If you decide to install a larger pump without considering these factors, it can cause operational problems rather than resolve the problem. Planning future capacity prior to initial design makes later expansion considerably easier.
Check that the waste water is flowing throughout construction
A wastewater pump station retrofit introduces a challenge that ordinary equipment replacement projects may not face: the station may need to remain operational throughout construction.
Even when contractors are busy, wastewater continues to arrive. According to the plan the project, a temporary bypass pumping system could be needed to keep service running while the equipment that is in use is removed or new equipment is installed.
Romtec Utilities addressed this type of challenge in the Federal Law Enforcement Training Center in Brunswick, Georgia.
The project involved the replacement of two of the old wastewater lift stations as well as maintaining the operation of the facility. The project was able adapt to the existing footprints of stations as well operating requirements using site-specific engineering and modular replacement systems. This illustrates why it is important to consider the construction sequence before installing.
If you decide to replace, it is the best Alternative
There are many stations that can be renovated. A seriously degraded wet well insufficient structural capacity or significant changes in hydraulic requirements may make an upgrade to a sewer lift station better than making changes to the current installation.
It is essential to take into account structural factors the compatibility of equipment and accessibility to construction, as well being long-term operational needs. Romtec Utilities begins retrofit and replacement projects by determining what components will be left and which will require replacement.
The company creates engineering solutions that are specific to the site initial designs, as well as budgetary estimates. Prefabricated components are also able to help with installation and can reduce on-site construction requirements.
The Project Doesn’t End When the Pumps Are Running
A modernized lift station must operate as an integrated system. Before returning a lift-station to normal service, startup testing, commissioning, as well as equipment verification are necessary to confirm that all pumps, controls and other equipment are operating as designed.
Manuals for operation and maintenance, as well as instruction for operators are essential. Maintenance staff must understand the latest equipment, operating procedures and other documentation before they take over responsibility for the station.
An effective retrofit will preserve the infrastructure that is still valuable and addresses the shortcomings that forced modernization.
Municipalities and owners of facilities need to look beyond the immediate repairs. The best projects incorporate the latest equipment in existing structures and ensure that essential service is maintained during construction. Also, they prepare the pumping system for continued operation for many years.