Enquiries
We would be delighted to hear from you and will can to respond to your email enquiries within 24 hours. Thank you for your interest in Marsh Industries.
Designed to deliver outstanding ammonia reduction within a shallow, compact footprint, the Ensign-EL sewage treatment plant sets a new benchmark for performance in constrained and environmentally sensitive sites.
Accredited to EN12566-3 Annex B for systems up to 50 Population Equivalent (PE), the Ensign-EL achieves ammonia concentrations as low as 1 mg/l through a robust multi-stage process incorporating primary settlement, advanced aerobic biological treatment with specialised biofilm media, and simultaneous nitrification and denitrification.
At just 1.6m in height, its shallow-dig design simplifies installation in challenging ground conditions and high water tables.
The Ensign-EL shallow sewage treatment plant employs a multi-stage process. It initiates with primary settlement, allowing solid particles to settle out. Subsequently, aerobic biological treatment occurs in two biozones filled with specialised biofilm support media. This unique media ensures highly efficient nitrification, reducing ammonia concentrations to a mere 1 mg/l in the final effluent.
Additionally, simultaneous nitrification and denitrification processes reduce nitrate levels.
This system holds accreditation to EN12566-3 Annex B for systems of up to 50 Population Equivalent (PE) and complies with the UK Forward for BSEN12566-3.
| Element | Ensign-EL Efficiency (%) |
Ensign:EL Effluent (mg/l) |
|---|---|---|
| COD | 92.2 | 63 |
| BOD | 95.6 | 14 |
| TNb | 53.5 | 28 |
| NH4-N | 97.8 | 1.0 |
| Ptot | 28.7 | 5.4 |
| SS | 94.5 | 21 |
| Accreditation | EN12566-3 test Annex B |
Accredited performance
The Ensign-EL packaged sewage treatment plant is fully tested and certified by PIA (Prüfinstitut für Abwassertechnik) in Aachen, Germany. Ensign-EL is accredited to EN12566-3 Annex B for systems up to 50 Population Equivalent (PE), attesting to its reliability and effectiveness.
Shallow dig
Common sewage treatment plants on the market often exceed 2.3m high. Ensign-EL sewage treatment plants from 4-50PE are only 1.6m in height, meaning installation is not only possible*, but easier and safer too.
Challenges raised by ground conditions and high water tables can be overcome with the 1.6m shallow depth of the Ensign-EL.
Multi-stage treatment
Ensign-EL employs a multi-stage process, featuring primary settlement, efficient aerobic biological treatment with specialised biofilm media, and denitrification, all in one system.
Enhanced materials and fire safety
Marsh glass reinforced plastic (GRP) materials outperform competitors, showing a remarkable 40% increase in strength through rigorous impact testing. Additionally, successful material fire resistance testing meets EN ISO 11925-2:2010 standards.
View our range of Shallow Ensign units
End users, merchants and installers alike recommend the Ensign range due to its ease of installation, reliability, and cost-effective operation and maintenance
Technical downloads for architects, engineers, consultants and specifiers including BIM files (RFA and IFC), DWG CAD files
