Why use Membrane Bioreactors (MBRs) in aquaponics

Membrane Bioreactors (MBRs) are used in aquaponics for several key reasons, primarily to enhance water quality and system efficiency. Here's a breakdown of the main benefits:

Superior Water Quality: MBRs combine biological treatment (like in a traditional bioreactor) with membrane filtration. This membrane acts as an extremely fine filter, removing suspended solids, bacteria, viruses, and other pathogens much more effectively than conventional filtration methods used in aquaponics (like media beds or clarifiers). This leads to clearer and healthier water for the fish.   

Enhanced Nutrient Management: While the primary source of nutrients for plants in aquaponics is fish waste, MBRs can help in optimizing nutrient availability. They can efficiently remove excess organic matter and solids, preventing the buildup of harmful substances. This can lead to a more stable and balanced nutrient profile for the plants.   

Reduced Footprint: MBR systems can be more compact compared to traditional treatment methods. The integration of biological treatment and filtration into a single unit reduces the need for separate clarifiers and sand filters, saving space. This is particularly beneficial for urban or space-limited aquaponic setups.   

Improved Fish Health: By consistently providing high-quality, pathogen-free water, MBRs contribute to a healthier environment for the fish. This can lead to reduced stress, lower disease rates, and improved overall fish growth.

Potential for Water Reuse: The high level of filtration achieved by MBRs produces effluent of very high quality. This treated water can be readily reused within the aquaponic system, reducing water consumption and making the system more sustainable, especially in areas with water scarcity.  

Removal of Fine Solids: Traditional aquaponic systems can sometimes struggle with the buildup of fine suspended solids that can cloud the water and potentially harm fish gills or plant roots. MBRs effectively remove these fine particles, ensuring clearer water and a healthier environment.