A Lift Station May Serve the Same Site for Decades But the Site Won’t Stay the Same

The engineering would be much simpler if the water arrived at exactly the same speed.

It’s not.

The amount of wastewater that enters a residential system can vary throughout the day. Commercial and industrial facilities might experience peak operating times. The flow of water in storms can be affected by weather conditions. Demand for clean water also increases and falls depending on the use.

It’s not enough just to choose equipment that is able to provide a certain flow when designing an equipment pumping station. Engineers must be aware of the different conditions that the system could be utilized.

Image credit: romtecutilities.com

Take into consideration the operating conditions and Not Just the Maximum Capacity

The maximum flow is important but it’s only part of the process. Imagine that a wastewater treatment system was designed to handle a large peak flow. Most of the time, incoming flow may be significantly lower. In these instances when the station is not operating, it must function properly.

This raises questions about wet-well size, pump operation and controls and head conditions as well as how equipment will respond to the changing demands.

A properly designed package pumping system brings these considerations to meet the needs of the facility instead of thinking of maximum pump capacity as the sole design goal.

The Wastewater Industry has its own daily Rhythm

A wastewater lift station serving homes, businesses, or municipal infrastructure may experience changing influent conditions throughout its operating cycle.

The station’s control strategies will determine how the system takes in wastewater and runs its pumps. The dimensions of the structural components, the pumping equipment and piping as well as electrical components and controls, all play an important role in this process.

Design can also include other considerations for the specific site. Romtec Utilities will incorporate any additional systems, like grinders, vaults and odor control devices as needed. This results in a station that is designed specifically for the specific project rather than being a generic design that can be used for all wastewater facilities.

Stormwater can alter much more quickly

Stormwater is a distinct operation. The stormwater stations can be quite quiet during dry weather, but experience a large inflow of water following a severe weather incident. The station could be part of a larger flood control treatment, detention or drainage strategy, making the stormwater strategy surrounding it an important element of the design.

Romtec Utilities takes into consideration aspects like the flow rate that is required, the head conditions, the size of the system as well as the needs of the location and environmental considerations in the design of these systems.

The layout of a station that is designed for commercial use could be very different from the design of a station created to manage stormwater in municipal areas.

Both head conditions and flow are important

Engineers must also know where the water is going and what obstacles they have to overcome. Engineers must also know where the water will be going and the resistance that must be overcome by the pumping system.

The changes in elevation, the piping configuration discharge conditions, and other system characteristics contribute to the head conditions that pumps operate.

The connection between flow rates and head is the reason that deciding on a motor solely on its capacity won’t be enough. The pump’s design and station’s design must be compatible to the hydraulic conditions to be used for the entire process.

Create a design that is based on the conditions the station will actually experience

Romtec Utilities develops customized pumping systems for wastewater, stormwater, clean water and industrial applications. and many other uses. The design process begins with preliminary designs plans, budgeting, set-ups, system supplies, documentation, testing and startup.

The fundamental concept of engineering is that the real pumping system don’t operate in a set of conditions.

They face fluctuating flows, shifting requirements, and project-specific hydro demands. This fact must be taken into consideration when designing a productive station.

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