A novel hybrid bioreactor was designed to remove volatile organic compounds from water contaminated with water‐soluble gasoline components, and the performance of this new bioreactor was investigated. It was composed of two biotrickling filter sections and one biofilter section. The liquid phase pollutants were removed by a mixed culture in the biotrickling filter sections and the gas phase pollutants stripped by air injection in the biofilter section. The specific rates of chemical oxygen demand (COD) removal obtained in the reactor were directly proportional to the pollutant‐loading rate. A stable operation of the hybrid bioreactor was attained for long periods of time. The bioreactor had the potential to simultaneously treat a complex mixture of volatile organic compounds, e.g., those present in the water‐soluble fraction of gasoline, as well as the capacity to readily adapt to changing operational conditions, such as an increased contaminant loading, and variations in the airflow rate.
The aim of this study was to apply an aerobic biotechnological process for the purification of seawater polluted with hydrocarbons. With this purpose, water samples from different sinkholes from Quintana Roo, Mexico, were collected during the seasons of high (July) and low tourist activity (October), and their levels of pollution were evaluated. The results show that anthracene and icosane concentrations were related to tourism activity. Another achievement of this work was the isolation of a mixed culture, including Enterobacter, Serratia, Escherichia, Proteus, and Klebsiella, from the most polluted sinkhole found, capable of using diesel as a sole carbon source. Finally, using the mixed culture, kinetic studies of diesel degradation in seawater were carried out by sequential batch in an airlift bioreactor, obtaining a high percentage, >75%, of diesel uptake after 100 h.
Sequences of indolicidin and protegrin-4 were taken from the Data Bank of Nebraska University, USA and were chemically synthesized without terminal amide and nor N
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.