MABR - Highly Efficient, Low Energy, TP/BOD/TN Removal Technology

Added 14 Feb 2018 by Rafi Laderman – Venturi

A low-energy advanced aerobic biological treatment. The Membrane Aerated Biofilm Reactor provides the surroundings for simultaneous nitrification and denitrification processes at low air pressure allowing BOD reduction, organic ammonia and TP removal

The single-stage multi-process occurs due to the tubular membrane with a laminated succession, which is permeable to air only. A constant stream of low pressure air permeates the membrane and with the biomass in the biofilm on the membrane’s surface oxidizes the ammonia (NH3) into nitrite (NO3). Then, the nitrite exposure to the anoxic conditions on the biofilm surface creates the denitrification, while consuming the BOD and releasing N2(g).
After the MABR treatment, the remaining BOD is treated at aerobic conditions and optional treatments can be added, e.g. tertiary treatments and others.
Previous installations in Israel, USA, USVI and more have shown the following performance:
• Reduced energy consumption by up to 50-80% (compared to other technologies);
• Reduced manpower need for operation and the level of expertise;
• High endurance to extreme weather conditions and to influent pollutants with a quick retention capability.
The current applications of the technology are:
Decentralized Systems (CMABR): a modular Fast-to-Deploy WWTP modular designed for easy expansion; suitable for 800-3,500 p.e needs; System prefabricated and easy; Reliable high-quality effluent at low energy and overall low operational costs. Suitable also as a Side-Stream Retrofitting Solution,
Retrofit upgrading of WWTP (SUBRE): The MABR modules can be installed in the anoxic part of the plant, providing: WWTP performance improvement in TN/TP removal; total influent/effluent capacity can grow by 20-30%; with minimal changes to the plant’s infrastructure and no extra concrete.

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