Engineering would be significantly easier if water came at the same rate.
It doesn’t.
The amount of wastewater entering a residential system varies throughout the day. Industrial and commercial buildings could have operating periods of peak. Stormwater conditions can alter dramatically in response to the weather. The demand for clean water can also change depending on its application.
It’s not enough just to select equipment that can meet a certain flow rate when designing the pumping station. Engineers need to be aware of the environment that the system will be exposed to.
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Think about operating conditions, Not Just Maximum Capacity
It is clear that the maximum flow is an essential element, but it only represents a part of the operation of the station. Imagine a wastewater system designed to provide a high peak flow. Typically that flow inflows are significantly lower. In these instances however, the station has to perform as it should.
This raises questions regarding wet-well size, pump operation and controls and head conditions and the way equipment can respond 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 Everyday Routine of Wastewater
The conditions of the influent at the wastewater liftstations that serve households, businesses or municipal infrastructure may change during the course of the operation.
The station’s control plan will determine how the system is able to collect wastewater and operate its pumps. Dimensions of the structure, pumps, valves, electric components, and controls all have roles in this process.
Other considerations specific to the location could affect the design. Romtec Utilities is able to integrate additional equipment like grinder vaults, or odor control equipment, depending on the application. This produces a facility that is engineered to fit the project, rather than being a standard design which can be applied to all wastewater sources.
Stormwater can change much faster
Stormwater provides a totally different operating situation. The stormwater stations can be relatively quiet during dry weather, but see a massive inflow of water following a severe weather storm. Stations are often a part of larger flood control and treatment, detention or control strategies which is why the stormwater plan is an essential part of system design.
Romtec Utilities takes into consideration aspects like the flow rate required, the head conditions, the size of the system as well as the needs of the location and environmental concerns when designing these systems.
The design of a station that is designed for commercial projects could differ significantly from the design of a station built to manage stormwater in a municipality.
Head Conditions Are Important Alongside Flow
Engineers need to be aware of where the water is going and the kind of resistance they have to overcome. Engineers also have to understand where the water is going and the kind of resistance the pumping system has to overcome.
The head of the pump is affected by a number of factors such as elevation changes in piping configurations, discharge conditions, and various other system features.
The relationship between head and flow is yet another reason why selecting a pump solely based on its rating isn’t enough. Pump technology and station layout must meet the hydraulic demands of the application.
Create a design for the conditions the Station is likely to experience
Romtec Utilities designs and develops custom pumping systems to meet the needs of wastewater, stormwater management and clean water, industrial applications, boosters and much more. The process involves preliminary design plans, budgeting, set-ups systems, supplies for the system, documentation, starting and testing.
The fundamental engineering principle is clear: the best pumping systems don’t live their lives operating under one ideal set of conditions.
It is also important to consider specific hydraulic requirements of the project, in addition to the fluctuating flow, demand and needs. A successful station has to be engineered for that reality.
