How To Choose An Effective Stormwater Filtration System

Stormwater can be a huge problem, a threat to the infrastructure and to the buildings in the area. In addition, it is a tremendous source of infestation with various pathogens. The best method to prevent such issues is to install an effective stormwater filtration system to remove debris and pathogens, making the water safe again. This article takes a closer look into choosing such a filtration system for your home or commercial facility.

First of all, an effective stormwater filtration system should be capable of removing pollutants from water and limit their re-release into the environment. Mos of these pollutants are sediment such as metals, nitrogen, phosphorus, fecal matters, and bacteria. A good filtration system should capture all these pollutants with excellent efficiency and effectiveness.

When choosing your system, you need to compare the different types of cartridges different systems use, in order to find the one that suits you best. The ideal stormwater cartridge filter should have a long service life, low maintenance needs, and a high effectiveness in capturing pollutants. There are such cartridges that are recyclable. If you care about the environment, this feature may influence your purchasing decision.

The correct sizing of your system is extremely important. There are several approaches to this issue. You can use the flow-based sizing method, the volume-based sizing method, or the mass-based sizing method.

The flow-based method is the method with the smallest carbon footprint. In order to use this approach, you have to determine the flow rate of the drainage area. Once you know the treatment flow rate, it’s going to be easy to choose the adequate filter size and the hydraulic capacity of the system. The main drawback of this method is that in some areas with extremely high storm water quality events, the treatment flow rate has to be very high. In such conditions, the volume-based approach could offer a more cost-effective solution. This method uses a detention system, which can be a pond, and underground pipe, or a concrete solution. By using this detention system, it is possible to control the flow, and therefore the size of the filter. The main drawback of this method is that it has to accommodate the detention system which features a relatively large footprint. In addition, a smaller filter device may lead to shorter maintenance cycles, thus increasing the operating costs.

The mass-based approach is a combination of the two methods described above. It is possible to size a filter to meet the mass load requirements for a specific maintenance interval. The biggest advantage of this method is that it takes into consideration both performance and longevity. It enables you to keep the costs low, without compromising on the effectiveness of the system.

Since there isn’t a one-fits-all solution, you’ll need to carefully assess your specific site conditions, in order to design the ideal system to enable you to filter stormwater with maximum of effectiveness and with minimal costs. A specialist in such systems will be able to determine the optimal configuration.


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