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ANITA™ Mox – A BioFarm Solution for Fast Start-up of Deammonifying MBBRs

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Anaerobic sludge digestion and all its optimized variants are key processes in the quest of selfsufficient or even energy-positive WWTP. However these processes lead to the generation of Nrich sidestreams, or reject water, which could reduce the energy benefit and the overall WWTP sustainability if they are treated with the mainstream due to increasing aeration and carbon substrate requirements. Therefore, using an energy- and cost-effective biological treatment dedicated to these sidestreams is recommended.

A novel 1-stage deammonification MBBR process called ANITA™ Mox has been developed for autotrophic N-removal from N-rich effluents. The first full-scale plant has recently been startedup at Sjölunda WWTP in Sweden (550,000 PE). By applying an innovative seeding strategy referred to as the “BioFarm” solution to reduce the commissioning period, the full-scale plant quickly reached a NH4-N removal rate of 1.2 kgN/m3.d with approximately 90% removal of the NH4-N load. This deammonification process is very stable and does not require any pre-treatment, addition of chemicals or heating system, making it very attractive to reduce the carbon footprint of the entire WWTP and to tend towards the energy-sufficient WWTP.
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Keywords: ANITA™ Mox; Anammox; Energy Savings; MBBR; Nitrogen removal; Sidestream treatment

Document Type: Research Article

Publication date: 2011-01-01

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