Phos-Lite ™ phosphate reduction system

Phosphate reduction without chemical dosing

Marsh Phos-Lite is a groundbreaking product designed to efficiently remove phosphate from wastewater.

Utilising a unique adsorption process, Phos-Lite 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.

Recommended for up to 35PE (population equivalent), Phos-Lite is fully scalable to meet larger demands.

Achieves phosphate levels of 0.2mg/l

The plant is engineered for maximum retention time, guaranteeing stable, low effluent phosphorus concentrations certified by PIA GmbH at 0.2mg/l.

Economic and efficient

With an electrical consumption of just 0.03 kWh/d, Phos-Lite operates at very low cost.

System flexibility

This innovative tertiary treatment solution seamlessly connects to the outlet of both new and existing treatment plants.

Enhanced effluent quality

Phos-Lite not only excels in phosphate removal but also significantly reduces other key effluent constituents:

COD reduction by 56.1%
BOD reduction by 59.5%
Suspended Solids reduction by 61.1%
Total phosphate (Ptot) efficiency at 95.9%, achieving 0.2mg/l

Specifications

Specifications
Model (pop)	Length	Width	Height	Inlet invert	Inlet dia Ø	Outlet invert	Outlet dia Ø
PL1	Ø1200	Ø1200	2010	650*	110	1085	110

* Inlet invert subject to outlet invert on preceding sewage treatment plant

Operating principle

KEY

Inlet
Inlet chamber
Filter sock (hidden from view)
Primary chamber
Flow control valve
Submersible pump
Pipework outflow (beneath lower shelf)
Phos-Pellet chamber
Outlet
Heavy duty GRP shell
Access cover

Marsh Phos-Lite illustration cutaway with numerical annotation

Features and benefits

Enhanced effluent quality
Phos-Lite not only excels in phosphate removal but also significantly reduces other key effluent constituents

COD reduction by 56.1%
BOD reduction by 59.5%
Suspended Solids reduction by 61.1%
Total phosphate (Ptot) efficiency at 95.9%, achieving 0.2mg/l

Long-term performance
Designed to retain up to 8.5kg of phosphorus over five years for a 6PE domestic plant (British Water Flows and Loads 4), Phos-Lite offers reliable performance. After this period, media performance can be reassessed and replaced if necessary, representing approximately 50% of the tested capacity.

Natural, non-dosing solution
The plant uses Phos-Lite pellets, a natural mineral media, to reduce phosphate levels, simplifying operations and reducing the environmental impact of chemical use.

Cost-effective and low maintenance
The non-dosing approach minimises the need for frequent maintenance and chemical adjustments, leading to cost savings over the plant’s lifetime.

Ease of integration
The plant is designed for seamless integration into existing systems, making it versatile for new installations and retrofits. Builders’ merchants will find this product a valuable addition to their offerings, catering to the growing demand for environmentally responsible wastewater treatment solutions.

Enhanced compliance
By achieving phosphate levels of 0.2mg/l, the plant ensures compliance with the tightest environmental standards, allowing water companies to meet regulatory obligations.

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.