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Multi-Layered Bioreactors: The New Standard in Managing Odors - Design considerations, Implementation issues and Operating experiences

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Polluted air streams nearly always contain a mixture of many compounds. These compounds are usually different in, for example, water solubility and biodegradability, which result in important consequences for its removal potential.

To remove all pollutants from an air stream using biotechnology, a mix of micro-organisms is required. Micro-organisms differ from each other by their capacities to use energy, carbon and nutrients sources. In addition, the optimal environmental conditions for the micro-organisms required are unfortunately not the same for all micro-organisms.

Therefore, depending on the many compounds in the air stream, a mix of micro-organisms is required and different environmental conditions for the micro-organisms result in a more efficient biological air treatment system.

Multi-layered bioreactors can provide these different environmental conditions, which are difficult to obtain and maintain in conventional biofilter systems. High odor removal efficiencies (≥98%) and low outlet odor concentrations (<1000 OU) have been obtained in full-scale applications at a relatively small footprint. Reactor design, however, as well as operating strategy is critical for success as outlined in this paper.

Document Type: Research Article


Publication date: 2008-01-01

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