Biolan Greywater Filter Light | Biological Grey Water Filtration System

The Biolan Greywater Filter Light is a compact, modular grey water filtration system designed for treating household grey water from sinks, showers and laundry. It uses a combination of mechanical and biological filtration to clean water before it is discharged into a gravel leach bed, making it ideal for cottages, off grid cabins and rural homes where simple, low energy treatment is needed.

Grey water passes through five stacked filter boxes inside the module. The organic filter material captures phosphates and other impurities while micro-organisms living on the surface of the media break down organic matter as their food source. Water flows by gravity from one layer to the next and exits as treated effluent. The filter material typically lasts 3 to 6 months depending on load and is easy to replace as part of regular maintenance.

This system is designed for grey water only. It must not receive toilet waste, storm water, foundation drainage or toxic chemicals. When installed and sized correctly, the Biolan Greywater Filter Light meets the limit values for total phosphorus, total nitrogen and organic material in grey wastewater in accordance with Environmental Protection Law 527/2014 and Decree 157/2017.

Key Features

Filtration method: Mechanical and biological grey water treatment using organic media and active micro-organisms
Filter layout: Five filter boxes stacked vertically inside each module
Flow pattern: Gravity flow from the top filter box down through each layer to outlet
Typical maintenance interval: Filter media replacement every 3 to 6 months depending on water volume and load
Chemical tolerance: Handles small amounts of common household cleaners, including mild antibacterial and chlorine based agents
Not suitable for: Human waste, storm water, foundation drainage, drain openers, paints, oils, solvents or any chemicals that can kill beneficial micro-organisms
Compliance: Meets grey water treatment requirements for phosphorus, nitrogen and organic matter under Environmental Protection Law 527/2014 and Decree 157/2017 when properly sized and installed
Ideal applications: Cottages, off grid homes, saunas, small residential grey water systems discharging to a leach bed

Dimensions and Capacity

Module size (width x height x depth): 56 cm x 58 cm x 96 cm Two modules installed in parallel – width: Approximately 1.30 m Two modules installed in parallel – depth: Minimum approximately 2.03 m Pipe connections: For Ø 75 mm sewer pipes (supplied with 2 x 75 mm to 3 inch PVC adapters) Inlet to outlet height difference: 45 cm height of fall Capacity per module: 300 litres per day Weight without filter material: 24 kg Water travel distance in media: 325 cm per module