Post: Designing Wastewater Infrastructure Around Growth Instead of Catching Up Later

The construction would be simpler if the water travelled in the exact same amount.

It does not.

The amount of wastewater that goes into a water system could fluctuate over the day. Industrial and commercial facilities could have operating peak times. The conditions for stormwater can drastically change according to the weather. Demand for clean-water can fluctuate depending on the application.

Image credit: romtecutilities.com

As a result, designing a pump station isn’t simply a matter of identifying one flow number and selecting equipment capable of meeting it. Engineers must understand the conditions that the system will be subject to.

Do not just think of capacity as well as operating conditions

Maximum flow is obviously important but it’s just one element of station operation. Imagine that a wastewater treatment facility was created to handle a high peak flow. The majority of the time, incoming flow may be much lower. During those normal operating periods the station should be functioning properly.

It raises issues such as wet-well sizing and sizing of the pump and control system, head condition, and how to modify equipment when demand shifts.

A properly designed package pumping system brings these elements to meet the needs of the location, instead of treating maximum pump capacity as the primary design goal.

The Routine for Wastewater

The conditions of the influent at a wastewater liftstation which serves homes and businesses, or infrastructure for municipal use may change during the course of its operation.

The station’s control strategy determines how the system collects wastewater and operates its pumps. The dimensions of the structural components, the pumps and the piping, along with electrical components and controls, all play part in this process.

The design might also include considerations specific to the site. Romtec Utilities is able to include auxiliary equipment, like grinder vaults and odor control equipment, depending on the particular application. It is cost-effective to create an entire station around a particular project rather than using general configurations for every wastewater site.

Stormwater can alter much more quickly

Stormwater has a distinct operational set of conditions. A stormwater system can be relatively quiet during dry weather, but see a massive inflow of water during a severe weather incident. The station could be part of a larger flood-control, detention, treatment, or drainage plan, which makes the stormwater plan surrounding it an integral part of the design.

Romtec Utilities takes into consideration things like the flow rate that is required as well as head conditions, the size of the system as well as the requirements of the location and environmental aspects in the design of these systems.

The design of a station used for commercial use could be quite different from that of a station built to handle stormwater for municipal areas.

The Head Conditions are Important Along with Flow

The issue of moving 1,000 gallons is not the only challenge for engineers. Engineers need to understand the direction of the water and the amount of resistance they will face.

Variations in elevation, piping design as well as discharge conditions and other aspects of the system influence the head conditions in which pumps work.

This connection between head and flow is yet another reason why selecting a pump solely based on its rating isn’t enough. The design and technology of the station should be designed to meet the hydraulic conditions of the whole application.

Design to meet the conditions that the Station Will Experiece

Romtec Utilities creates customized pumping system for wastewater, stormwater and clean water applications. They also develop systems for industrial, boosters and other applications. The procedure can involve budgeting and design in the beginning as well as complete plans, system supplies, documentation and start-up, testing and commissioning.

The premise behind the design is simple pumps don’t spend their entire lives working under the same set of conditions.

They must also consider the particular hydraulic requirements for the project in addition to the fluctuating flow, demand and demands. This reality must be taken into account when designing a functional station.