It could make engineering easier if all water came at the same speed.
It’s not.
The volume of wastewater that enters residential systems varies over the day. Industrial and commercial buildings can have operating peak times. The flow of stormwater can be affected by weather conditions. The need for clean water can also change dependent on the purpose for which it is used.
As a result, designing a pump station isn’t simply a matter of identifying one flow amount and then selecting the equipment capable of meeting it. Engineers need to be aware of what kind of environment the system is expected to be exposed to.
Image credit: romtecutilities.com
Think beyond capacity maxima, as well as operating conditions
A high flow is definitely important, but it represents only one element of station operation. Imagine that a wastewater treatment facility was created to handle a high flow at peak. Most of the time the flow inflow is less. During those normal operating periods the station should be able to function properly.
It raises issues such as wet-well sizing and sizing of the pump and control system, head condition, and how to adjust equipment as demand shifts.
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 daily rhythm of wastewater
A sewerage lift station servicing homeowners, businesses or municipal infrastructure could have varying influent conditions during its operating cycle.
The station’s control strategy will decide how the station is able to collect wastewater and operate its pumps. This requires the structural dimensions and pumping gear, valves and pipes, as well as electrical components.
Design can also include different considerations specific to the location. Romtec Utilities will incorporate any extra systems, including grinders vaults or odor-control equipment in the event of need. It’s more economical to design stations around a specific project rather than implementing the same configuration for each wastewater treatment facility.
Stormwater may change faster than you think.
Stormwater is a totally different type of operation. When it is dry it is possible that a stormwater lift facility may not see much use. However, during extreme storms, the station could see a significant increase in activity. Stations could be a component of larger flood control, detention or treatment strategies which is why the stormwater plan is a crucial element in system design.
Romtec Utilities takes into consideration factors such as the flow rate required and head conditions, the system size and the requirements of the site and environmental aspects when designing these systems.
A station for a commercial area may, therefore, look distinct from one that was designed to serve a municipal stormwater system.
The Head Conditions are vital. along with flow
Engineers must also know where the water is heading and the resistance they be able to overcome. Engineers also have to understand the direction of the water and the resistance that the pumping system must overcome.
Variations in elevation, piping design as well as discharge conditions and other system characteristics influence the head conditions that pumps work.
The relationship between head and flow is a reason why selecting a pump based on a capacity rating isn’t enough. The technology of the pump and station configuration have to suit the requirements of the complete application.
Plan for the Conditions that the Station Will Experiece
Romtec Utilities develops customized pumping systems for wastewater, stormwater cleaner water, booster, industrial, and many other uses. Its procedure may involve budgeting and preliminary design including complete plans, system supply, documentation, and startup, testing and commissioning.
The principle behind the design is quite simple pumping systems can’t have to work for the rest of their lives under one set of convenient conditions.
They must contend with shifting demands, flows and specific hydro requirements for projects. This fact is something to consider when designing a functional station.