It could make engineering simpler if all the water flowed at the same rate.
It’s not.
In a residential area, the amount of wastewater that goes into the system could vary over the course of the day. Commercial and industrial buildings may have operating peaks. Stormwater conditions can dramatically change in response to weather conditions. The demand for clean water can also change depending on its application.
To design an efficient pumping station, it is not only a matter of selecting the equipment that can meet a specific flow. Engineers need to be aware of the environment that the system will be exposed to.
Image credit: romtecutilities.com
Don’t only think about capacity maxima, but also operational conditions
A high flow is definitely important, but it represents only one part of station operation. Imagine a wastewater system that is designed for a large peak flow. Most of the time the flow that enters it could be much lower. In these instances however, the station has to perform as it should.
It brings up issues like wet-well sizing and the size of the pump as well as control conditions for head, how to adjust equipment as demand shifts.
The design of an engineered package pumps system will take into consideration the specific requirements of the site, rather than focusing on max capacity of the pump.
Wastewater Has Its Own Daily Theme
A wastewater lift station serving homes, businesses, or municipal infrastructure may experience changing influent conditions throughout its operating cycle.
The station needs an appropriate control system that permits the system to start the pumps and collect the wastewater. This involves design and dimensions of the structure as well as pumping gear, valves and piping as well electrical components.
The design could also incorporate aspects specific to the particular site. Romtec Utilities is able to include auxiliary equipment, like grinder vaults and odor control equipment, based on the application. The result is a station that is engineered to fit the specific project rather than being a generic design which can be applied to all wastewater sources.
Stormwater is able to change significantly faster
Stormwater provides a totally different operational scenario. The stormwater stations can be relatively quiet during dry conditions, and then see a massive inflow of water in a major weather event. Stations could be a component of larger flood control methods, detention and treatment plans, so the stormwater plan is an essential part of system design.
Romtec Utilities takes into consideration elements like the flow rate required along with head-related conditions, the size of the system and the requirements of the site and environmental concerns when designing these systems.
Stations for commercial development may look very different than those designed for municipal stormwater systems.
The Head Conditions are vital. Along with Flow
The issue of transporting 1,000 gallons is not the only engineering problem. Engineers need to be aware of where the water is going to go and the level of resistance required by the pumping system.
The head of the pump is influenced by several factors which include elevation variations and piping configurations, discharge conditions, and other system aspects.
The connection between head and flow is one reason simply choosing one based on capacity rating doesn’t suffice. The pump technology and the station’s design must be compatible to the conditions of hydraulics throughout the application.
The design should reflect the conditions that the station will experience
Romtec Utilities creates customized pumping system for wastewater, stormwater and clean water applications. They also design and develop systems for boosters, industrial and other purposes. Its procedure can comprise the preliminary design and budgeting process and complete set of plan sets as well as documentation as well as startup, testing and commissioning.
The basic principle of engineering is that a real pumping system don’t operate under one condition.
They have to contend with shifting flows, changing requirements, and project-specific hydro demands. This should be considered when designing a successful station.
