Engineering would be considerably simpler if water always arrived at the same rate.
It’s not.
The amount of wastewater entering a residential system varies throughout the day. Commercial and industrial facilities might have peak operating hours. Stormwater can change dramatically with weather conditions. The need for water that is clean also differs dependent on the purpose for which it is used.
It’s not enough to select equipment that can achieve a specific flow rate when designing the pumping station. Engineers have to understand the various conditions the system is expected to be exposed to.
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Think beyond maximum capacity, but also operational conditions
The maximum flow is important however it’s just one element of the station’s operation. Imagine a system for wastewater which is designed for high flow rate. Typically, incoming flows may be less. In these times, the station must still operate properly.
This leads to questions on wet-well sizing, pump operation, control, head conditions and how equipment reacts to demand fluctuations.
A properly engineered package pumping system brings these considerations together around the actual requirements of the site instead of treating maximum pump capacity as the entire design objective.
The wastewater industry has its own day-to-day Timeline
A wastewater lift station that serves homes, businesses or municipal infrastructure might be subject to changing influent conditions throughout its life cycle.
The system has to be able to collect water and operate its pumps according to the control strategy established for the station. This process involves design and dimensions of the structure, pumping gear, valves and piping as well electrical components.
Design could also incorporate additional considerations specific to the site. Romtec Utilities is able to incorporate auxiliary equipment such as grinder vaults, or odor control equipment, based on the particular application. It is more cost-effective to design an entire station around a particular project rather than using an identical configuration to every wastewater treatment facility.
Stormwater is able to change significantly faster
Stormwater offers a different set of operating conditions. In dry conditions, a stormwater lift station is likely to not be utilized much. However, during extreme weather events the station will witness a significant rise in activity. Stations may be part of larger flood control techniques, such as detention or treatment, so the stormwater plan is an important component of the design of the system.
Romtec Utilities takes into consideration factors such as the flow rate that is required along with head-related conditions, the system size as well as the needs of the location and environmental concerns when designing these systems.
A station that serves a commercial project could, therefore, appear completely different from one that is designed for a municipal stormwater application.
Head Conditions Are Important Alongside Flow
The problem of moving 1,000 gallon is not the only challenge for engineers. Engineers need to understand the direction of the water and how much resistance it will encounter.
Pumps operate at various head levels based on the system’s configuration, including the piping, discharge conditions, etc.
That relationship between flow and head is the reason why choosing a pump based on a capacity rating isn’t enough. Technology and station layout must be in line with the hydraulic requirements of the particular application.
Design the station for the conditions it will actually encounter
Romtec Utilities creates customized pumping system for wastewater, stormwater and clean water applications. They also design systems for boosters, industrial and other applications. The process involves preliminary design and budgeting, as well as plan sets systems, supplies for the system, documentation, and startup and testing.
The concept behind this design is straightforward: pumping systems do not need to be able to operate for their entire life under one set of convenient conditions.
They have to contend with fluctuating flows, shifting requirements, and project-specific hydro demands. It is crucial to create a station that is able to handle this reality.