Abstract
Escherichia coli bacteria were grown inside the channels of cordierite monoliths previously coated with a very good adhered carbon layer. These monolithic structures were tested at room temperature for the nitrate elimination of water solutions working as a batch monolithic bioreactor and showed very good results, as 100% of the nitrates and nitrites were completely removed in the used experimental conditions. Different rate flows of bacteria growth and nitrate elimination were studied, showing that the higher the flow velocity, the faster the nitrate elimination. Finally, the reproducibility tests confirmed the good performance of the proposed bioreactor.
Highlights
High nitrate amounts in water provoke the overpopulation of some aquatic plants, because these have a lot of nitrogen available for their growth, producing the eutrophication in rivers and lakes, as well as the proliferation of harmful microalgae [1,2]
The carbon not coated have well-developed porosity a 10.5layer wt.%did of the monolith, and the carbon(Table layer 1), hadbut an its thickness allowed part of the macroporosity and roughness of cordierite to be kept open and covered, average thickness of 7 μm
Figure that bacteria everywhere thelater monolithic bacterial growth in the channels should be an important parameter to be taken into account in future eliminationcompartments, time was much those shorteradhered when compared to similar reaction
Summary
High nitrate amounts in water provoke the overpopulation of some aquatic plants, because these have a lot of nitrogen available for their growth, producing the eutrophication in rivers and lakes, as well as the proliferation of harmful microalgae [1,2]. 4.6 cm bacteria growth (first number) and denitrification process (second number) were carried out using a flow rate of 4.6 cm3 min−1. Monolithic channels of the carbon-coated be used in in all the urban water denitrification
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