1. Inlet with ‘Forsheda seal’

Forsheda seal provides flexibility in the joint for easier installation.Optional risers to increase invert depth are available.

2. Primary settlement chamber

3. Aeration chamber

4. Advanced compressor with alarm (Ensign:Ultra units only)

Near silent compressor ensures minimal running, maintenance and servicing costs. Integral alarm detects low pressure in air line. (Regular Low-energy compressor on Ensign:Standard models).

5. Compressor housing – internal or external options available

The compressor can be housed internally or externally with no difference in cost.External recommended to increase compressor life, and supplied as standard on 4PE, shallow and pumped outlet versions.

6. RCD/Electrical connection (Ensign:Ultra units only)

The RCD box provides easier installation and proveds a higher degree of safety. (Regular plug/socket connection on Ensign:Standard models).

7. PVC pressure pipe/diffuser(s)

Provides a protective conduit for the air diffuser line. Can be easily removed for maintenance and cleaning.

8. Bio-media

High specification bio-media (310m3 per m2) and membrane diffusers ensure even circulation to eliminate ‘dead spots’. The bio-media is contained by a stainless steel securing mesh to ensure no migration during handling or potential flooding.

9. Stainless steel mesh

Retains media in aeration chamber during transportation and handling, and in the event of flooding.

10. Final settlement chamber

11. 32mm sludge return

Larger diameter sludge return prevents the possibility of blockages and improves system circulation. Provides higher effluent quality whilst balancing flow over a 24 hour period or periods of intermittent use.

12. Unique Polylok tertiary filter (Ensign:Ultra units only)

The Polylok tertiary filter reduces suspended solids and BOD by a further 40% helping to extend drainage field life.

13. Outlet with ‘Forsheda seal’

Forsheda seal provides flexibility in the joint for easier installation. Optional pumped outlets are available.

14. Impermeable lid

Heavy duty lid/frame improves strength and durability whilst blending into the surrounding environment. (Regular lid on Ensign:Standard models).

15. Integral steadying eyes

For safe and secure on-site handling.

16. Stabilising feet

Stabilising feet prevents the tank from rolling and allows safe and steady transportation and installation.

17. Unique ‘keying-in’ lip

Assists anchoring into granular or concrete surrounds.

1. Inlet with ‘Forsheda seal’

   Forsheda seal provides flexibility in the joint for easier installation. Optional risers to increase invert depth are available.

2. Primary settlement chamber
3. Aeration chamber
4. Advanced compressor with alarm (Ensign:Ultra units only)

   Near silent compressor ensures minimal running, maintenance and servicing costs. Integral alarm detects low pressure in air line. (Regular Low-energy compressor on Ensign:Standard models).

5. Compressor housing – internal or external options available

   The compressor can be housed internally or externally with no difference in cost. External recommended to increase compressor life, and supplied as standard on 4PE, shallow and pumped outlet versions.

6. RCD/Electrical connection (Ensign:Ultra units only)

   The RCD box provides easier installation and proveds a higher degree of safety. (Regular plug/socket connection on Ensign:Standard models).

7. PVC pressure pipe/diffuser(s)

   Provides a protective conduit for the air diffuser line. Can be easily removed for maintenance and cleaning.

8. Bio-media

   High specification bio-media (310m3 per m2) and membrane diffusers ensure even circulation to eliminate ‘dead spots’. The bio-media is contained by a stainless steel securing mesh to ensure no migration during handling or potential flooding.

9. Stainless steel mesh

Retains media in aeration chamber during transportation and handling, and in the event of flooding.

10. Final settlement chamber

11. 32mm sludge return

Larger diameter sludge return prevents the possibility of blockages and improves system circulation. Provides higher effluent quality whilst balancing flow over a 24 hour period or periods of intermittent use.

12. Unique Polylok tertiary filter (Ensign:Ultra units only)

The Polylok tertiary filter reduces suspended solids and BOD by a further 40% helping to extend drainage field life.

13. Outlet with ‘Forsheda seal’

Forsheda seal provides flexibility in the joint for easier installation. Optional pumped outlets are available.

14. Impermeable lid

Heavy duty lid/frame improves strength and durability whilst blending into the surrounding environment. (Regular lid on Ensign:Standard models).

15. Integral steadying eyes

For safe and secure on-site handling.

16. Stabilising feet

Stabilising feet prevents the tank from rolling and allows safe and steady transportation and installation.

17. Unique ‘keying-in’ lip

Assists anchoring into granular or concrete surrounds.

1. Inlet with ‘Forsheda seal’

   Forsheda seal provides flexibility in the joint for easier installation.Optional risers to increase invert depth are available.

2. Primary settlement chamber
3. Aeration chamber
4. Advanced compressor with alarm (Ensign:Ultra units only)

   Near silent compressor ensures minimal running, maintenance and servicing costs. Integral alarm detects low pressure in air line. (Regular Low-energy compressor on Ensign:Standard models).

5. Compressor housing – internal or external options available

   The compressor can be housed internally or externally with no difference in cost.External recommended to increase compressor life, and supplied as standard on 4PE, shallow and pumped outlet versions.

6. RCD/Electrical connection (Ensign:Ultra units only)

   The RCD box provides easier installation and proveds a higher degree of safety. (Regular plug/socket connection on Ensign:Standard models).

7. PVC pressure pipe/diffuser(s)

   Provides a protective conduit for the air diffuser line. Can be easily removed for maintenance and cleaning.

8. Bio-media

   High specification bio-media (310m3 per m2) and membrane diffusers ensure even circulation to eliminate ‘dead spots’. The bio-media is contained by a stainless steel securing mesh to ensure no migration during handling or potential flooding.

9. Stainless steel mesh

Retains media in aeration chamber during transportation and handling, and in the event of flooding.

10. Final settlement chamber

11. 32mm sludge return

Larger diameter sludge return prevents the possibility of blockages and improves system circulation. Provides higher effluent quality whilst balancing flow over a 24 hour period or periods of intermittent use.

12. Unique Polylok tertiary filter (Ensign:Ultra units only)

The Polylok tertiary filter reduces suspended solids and BOD by a further 40% helping to extend drainage field life.

13. Outlet with ‘Forsheda seal’

Forsheda seal provides flexibility in the joint for easier installation. Optional pumped outlets are available.

14. Impermeable lid

Heavy duty lid/frame improves strength and durability whilst blending into the surrounding environment. (Regular lid on Ensign:Standard models).

15. Integral steadying eyes

For safe and secure on-site handling.

16. Stabilising feet

Stabilising feet prevents the tank from rolling and allows safe and steady transportation and installation.

17. Unique ‘keying-in’ lip

Assists anchoring into granular or concrete surrounds.

1. Inlet with ‘Forsheda seal’

   Forsheda seal provides flexibility in the joint for easier installation.Optional risers to increase invert depth are available.

2. Primary settlement chamber
3. Aeration chamber
4. Advanced compressor with alarm (Ensign:Ultra units only)

   Near silent compressor ensures minimal running, maintenance and servicing costs. Integral alarm detects low pressure in air line. (Regular Low-energy compressor on Ensign:Standard models).

5. Compressor housing – internal or external options available

   The compressor can be housed internally or externally with no difference in cost.External recommended to increase compressor life, and supplied as standard on 4PE, shallow and pumped outlet versions.

6. RCD/Electrical connection (Ensign:Ultra units only)

   The RCD box provides easier installation and proveds a higher degree of safety. (Regular plug/socket connection on Ensign:Standard models).

7. PVC pressure pipe/diffuser(s)

   Provides a protective conduit for the air diffuser line. Can be easily removed for maintenance and cleaning.

8. Bio-media

   High specification bio-media (310m3 per m2) and membrane diffusers ensure even circulation to eliminate ‘dead spots’. The bio-media is contained by a stainless steel securing mesh to ensure no migration during handling or potential flooding.

9. Stainless steel mesh

Retains media in aeration chamber during transportation and handling, and in the event of flooding.

10. Final settlement chamber

11. 32mm sludge return

Larger diameter sludge return prevents the possibility of blockages and improves system circulation. Provides higher effluent quality whilst balancing flow over a 24 hour period or periods of intermittent use.

12. Unique Polylok tertiary filter (Ensign:Ultra units only)

The Polylok tertiary filter reduces suspended solids and BOD by a further 40% helping to extend drainage field life.

13. Outlet with ‘Forsheda seal’

Forsheda seal provides flexibility in the joint for easier installation. Optional pumped outlets are available.

14. Impermeable lid

Heavy duty lid/frame improves strength and durability whilst blending into the surrounding environment. (Regular lid on Ensign:Standard models).

15. Integral steadying eyes

For safe and secure on-site handling.

16. Stabilising feet

Stabilising feet prevents the tank from rolling and allows safe and steady transportation and installation.

17. Unique ‘keying-in’ lip

Assists anchoring into granular or concrete surrounds.

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.

SBR technology for superior nitrate reduction
The Nutra-Lite harnesses SBR technology, achieving an impressive 84% biological reduction in nitrates. Unlike traditional methods, no chemicals or carbon are used – just biological processes.

Remote configuration and adaptability
Unique to Marsh Industries, the Nutra-Lite sewage treatment plant can be adapted to seasonal changes in biological treatment, ensuring optimal year-round performance. Remote configuration allows adjustments based on ongoing nitrate reduction research.

Secure telemetry and alarm monitoring
All Nutra-Lite sewage treatment plants feature bi-directional communication for maintenance and monitoring. Telemetry options include mobile connectivity or homeowner Wi-Fi/internet.

Efficiency and cost savings
A single compressor minimises electrical power consumption without compromising performance. Economy mode further reduces running costs during process changeovers.

Material strength and fire safety
Marsh Industries’ GRP material successfully meets the requirements of EN ISO 11925-2:2010 standards and is tested for direct flame impingement. All units come with a 25-year structural guarantee.

Certified performance
Rigorously tested at the world-leading notified test centre, PIA GmbH, in Aachen, Germany, the Nutra-Lite is certified to BS EN 12566-3 after 50 weeks of continuous testing. 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, demonstrating its reliability and effectiveness.

A unique, two-in-one system

The Marsh Gemini enables a compact installation when both of our market-leading natural solutions, Nutra-Lite and Phos-Lite, are required. It also offers adaptability in tank diameters to suit specific site ground conditions.

This single unit houses the two certified systems: Nutra-Lite and Phos-Lite. The Nutra-Lite provides advanced Sequential Batch Reactor (SBR) sewage treatment, while the Phos-Lite further enhances effluent quality and supports the achievement of challenging phosphate reduction targets.

Nutra-Lite significantly reduces biological nitrates through state-of-the-art technology and has been rigorously tested, boasting the mhighest overall discharge quality of any plant available today.

Treated effluent passes from the Nutra-Lite phase to the Phos-Lite phase for the removal of phosphates without the need for chemical dosing. Using a unique adsorption process, the Phos-Lite phase binds phosphorus to the surface of its media, which is composed of naturally occurring elements. This ensures long-term performance across varying flow rates and influent concentrations.

Comprehensive nutrient removal
Marsh’s nutrient removal technology combines Aqua-Puratine:EL and Aqua-Puratine-G-APS, providing a holistic solution for reducing pollutants and nutrients, including ammonia, nitrate, phosphate, BOD, and suspended solids.

Environmental compliance
This integrated system ensures compliance with strict environmental standards, making it ideal for areas with ‘Nutrient Neutrality’ designations and tight consent to discharge requirements.

Multi-stage treatment
Aqua-Puratine:EL employs a multi-stage process, featuring primary settlement, efficient aerobic biological treatment with specialised biofilm media, and denitrification, all in one system.

Accredited performance
The Marsh Aqua-Puratine system is fully tested and certified by PIA (Prüfinstitut für Abwassertechnik) in Aachen, Germany. Aqua-Puratine:EL is accredited to EN12566-3 Annex B for systems up to 50 Population Equivalent (PE), attesting to its reliability and effectiveness.

Precise chemical dosing
The Aqua-Puratine-G-APS introduces controlled chemical dosing for phosphate removal, ensuring accurate chemical infusion that matches influent phosphate loads, preventing wasteful overdosing.

Optimised design
The Aqua-Puratine-G-APS’s two equally sized chambers optimise phosphorus removal and biosolids settling.

Energy-efficient
The Aqua-Puratine-G-APS consumes only 1 kWh per day, contributing to energy savings.

Reduced environmental impact
By adjusting dosing based on inflow and avoiding continuous dosing, the system minimises metal concentrations in effluent, ensuring safety for the environment, wildlife, and children.

GSM/3G/4G monitoring
All Aqua-Puratine:EL and Aqua-Puratine Aqua-Puratine-G-APS combinations feature monitoring alarms to notify Marsh and homeowners in case of faults, ensuring timely maintenance and system integrity.

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.

1 Inlet
Optional risers to increase invert depth are available.

2 Primary settlement chamber

3 Aeration chamber

4 Low-energy compressor
Near silent compressor ensures minimal running, maintenance and servicing costs.

5 Compressor housing – internal or external options available
The compressor can be housed internally or externally with no difference in cost.
External recommended to increase compressor life, and supplied as standard on 4PE, shallow and pumped outlet versions.

6 PVC pressure pipe/diffuser(s)
Provides a protective conduit for the air diffuser line. Can be easily removed for maintenance and cleaning.

7 Securing mesh
Retains media in aeration chamber during transportation and handling, and in the event of flooding.

8 Final settlement chamber

9 Sludge return (32mm)
Larger diameter sludge return prevents the possibility of blockages and improves system circulation. Provides higher effluent quality whilst balancing flow over a 24 hour period or periods of intermittent use.

10 Outlet
Optional pumped outlets are available.

11 Standard impermeable lid
Impermeable lid improves strength and durability whilst blending into the surrounding environment.

12 Stabilising feet
Stabilising feet prevents the tank from rolling and allows safe and steady transportation and installation.

13 Unique ‘keying-in’ lip
Assists anchoring into granular or concrete surrounds.

Bio-media
High specification bio-media (310m3 per m2) and membrane diffusers ensure even circulation to eliminate ‘dead spots’. The bio-media is contained by a securing mesh to ensure no migration during handling or potential flooding.

Integral lifting eyes
For safe and secure handling onsite.