Nero MBR membrane system

The Nero MBR is a new-generation membrane system which is designed for use in wastewater bioreactors and provides non-clogging filtration with only simple pre-screening required.

The technology is applicable for membrane bioreactors in abattoirs, rendering plants, dairy and cheese plants, sewage treatment plants, blackwater treatment, leachate treatment, general industrial, food processing, mining, chemical industries, containerised packaged systems and deployable systems.

The system uses flat plate technology that employs ultra-filtration plates mounted in a stainless steel sub frame. Non-woven PVDF/PET materials are used for the membrane for good physical and chemical properties.

The uniform distribution of pore sizing and the non-clogging design of the membrane result in stable filtration that is resistant to blockage or blinding. Simple 3 mm pre-screens are sufficient, low trans-membrane pressure is required, and effective cleaning occurs with an even distribution of the air scour.

Before the advent of membrane bioreactors, conventional biological processes relied on gravity separation of the biomass from the water phase to yield a treated water stream. The concentration within the reactor was limited in order to enable gravity separation and to overcome hindered settling.

Membrane bioreactors instead use a filtration step to separate the biomass from the water phase. A higher reactor concentration is possible, resulting in a reduction of the reactor process volume, leading to a significantly smaller plant footprint.

Biomass filtration through the membrane is claimed to produce yields of higher quality effluent that are almost free of suspended solids, germs and bacteria.

The Nero MBR modules are supplied in two sizes to cater for a variety of flow rates in bioreactors.

Both module types have a maximum MLSS of 18,000 mg/L and a maximum trans-membrane pressure of 20 kPa.