It could make engineering much easier if all water moved at the same speed.
It’s not.
Wastewater entering a residential system could vary over the course of the day. Industrial and commercial facilities could encounter operating peaks. Stormwater conditions can change dramatically with the weather. The need for clean water also varies in relation to its use.
It is not enough to pick equipment that will achieve a specific flow rate when designing the pumping station. Engineers must know the potential conditions under which the equipment will be used.
Image credit: romtecutilities.com
Be aware of operating conditions, Not Just Maximum Capacity
It’s obvious that maximizing flow is an important aspect however, it’s just one aspect of the operations of an installation. Suppose a wastewater system is constructed to handle a large maximum flow. In the majority of cases the flow coming in is lower. However, the station has to be operational during normal periods.
This introduces questions about wet-well capacity, pump operation, control, head conditions and how equipment reacts to changes in demand.
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 Routine for Wastewater
The conditions for the water that flows through the wastewater liftstation that serves households business, municipal infrastructure or even businesses can change over the course of the operation.
The system has to be able to collect water and operate its pumps based on the established control plan by the station. The process involves the structural dimensions, pumping gear, valves and piping, as well as electrical components.
The design can also incorporate factors specific to the area. Romtec Utilities is able to include auxiliary equipment, like grinder vaults and odor control equipment, based on the needs of the. It’s more economical to create a station around a specific project rather than implementing general configurations for every wastewater treatment facility.
Stormwater is able to change significantly faster
Stormwater provides a totally different operating scenario. A stormwater lift-station may have a low level of activity during dry conditions, and then encounter an influx that is significantly greater when a weather storm occurs. It could be part of a comprehensive flood-control plan or a detention, treatment or drainage plan.
Romtec Utilities takes into consideration factors such as the flow rate that is required along with head-related conditions, the system size and the requirements of the site and environmental issues when designing these systems.
A station used for commercial project could, therefore, appear quite different from one engineered to serve a municipal stormwater system.
Head Conditions Are Important Alongside Flow
Moving 1,000 gallons of water is only part of the engineering issue. Engineers should also be aware of where that water is going and what kind of resistance the pumping system must overcome.
The head of the pump is influenced by a number of factors that include elevation changes in piping configurations, discharge conditions, and other system aspects.
This relationship between flow and head is one reason that choosing an appropriate pump based upon a capacity rating isn’t enough. The technology of the pump and station’s design must be compatible to the hydraulic parameters for the whole application.
Create the station to meet the conditions it will actually be exposed to
Romtec Utilities develops customized pumping systems for wastewater, stormwater clean water, booster, industrial, and many other uses. The design process begins with preliminary designs plans, budgeting, set-ups, system supplies, documentation, and startup and testing.
The principle behind the system is as simple as this pumps don’t require a long time to work under one set of convenient conditions.
They encounter changing flows, changing requirements, and project-specific hydro demands. It is vital to design a station that can handle this reality.