VSEP – Membrane Filtration system

Value in Biogas and Nitrogen Removal

When integrated with Rotary Press dewatering, VSEP forms a complete, two-stage treatment solution for biogas and wastewater plants.

• Rotary Press separates solids and reduces sludge volume.

• VSEP treats the liquid fraction (reject water or centrate), removing nitrogen, phosphorus, and PFAS.

• Combined, they deliver up to 99.9% nitrogen reduction and clean water for discharge or reuse — with minimal energy use and operator attention.

This approach supports circular resource use by returning nutrients to agriculture and protecting waterways from eutrophication.

The VSEP system combines an ultra-fine membrane filter with a powerful electric motor that generates vibrations through an unbalanced shaft. The vibration creates a shear wave across the membrane surface, preventing fouling and maintaining continuous flow.

Process overview:

1. Feed – Liquid (such as sludge reject water or digestate) enters the VSEP module.

2. Vibration – The membrane pack vibrates rapidly, generating shear forces that keep particles suspended.

3. Filtration – Clean permeate passes through the membrane, while solids and contaminants remain in the concentrate.

4. Recovery – The result is clear water suitable for reuse and a concentrated stream rich in nutrients or solids for further processing.

This dynamic action allows VSEP to filter fluids that would quickly clog traditional RO, UF, or NF systems — resulting in higher recovery rates and longer uptime.