Biofiltration is a clean technology in which a microbial consortium is cultivated and immobilized on to a support to eliminate gaseous polluting compounds generating mainly water, CO2 and biomass. This work focused on the biofiltration of methanol, a polluting volatile organic compound, mainly emitted by paper mill, wood, painting, pharmaceutical...
The discharges of wastewaters coming from the Petrochemical Industry have great relevance world wide, due to the presence of aromatic compounds, ammonium and high concentrations of sulfide mainly, which have an adverse impact in natural ecosystems and public health. Therefore the necessity to find biological systems that remove from residual...
The influence of type of reactor (CSTR, completely stirred tank reactor and airlift) and type of influent (lithoautotrophic medium, lithoautotrophic medium plus acetate and lithoautotrophic medium plus complex wastewater) on exopolymeric substances produced by a nitrifying sludge (proteins, carbohydrates and lipids) as well as its relationship with sludge settleability was...
En el presente estudio se analizó el efecto de diferentes factores ambientales y nutricionales en la producción de pigmentos carotenoides, particularmente astaxantina, a partir de la la microalga verde unicelular Haematococcus pluvialis y la levadura basidomiceta Phaffia rhodozyma NRLL-10921 (BMH-103) Para la producción de carotenoides con H. pluvialis se empleó...
Methane, a greenhouse gas, is produced from the activity of methanogenic archaea under anaerobic conditions. Methanogenic activity is dominant in freshwater sediments; however, in estuarine sediments and brackish wetlands, the production and emission of methane has also been determined. Studies on methane emissions in tropical brackish environments have been carried...
Discharges of nitrogen into the wastewaters, which is generally ammonium, has been removed through a two step sequential process: autotrophic nitrification and heterotrophic denitrification. As a first step ammonium is converted to nitrate under aerobic conditions (nitrification). In a second step nitrate is reduced to nitrogen gas (denitrification). At the...
En éste trabajo se reporta la degradación CS2, ET y DMS en filtros biológicos de escurrimiento. El uso de un medio de cultivo alcalino no aumentó significativamente la cantidad soluble de DMS; no obstante, incrementó la solubilidad del CS2 y el ET en 50 y 80% respectivamente. Por lo tanto...
La separación de efluentes domésticos utilizando inodoros ahorradores permite obtener aguas cafés con altas concentraciones de materia orgánica. Sin embargo, el uso de compuestos desinfectantes y celulosa podría afectar los tratamientos anaerobios. Por lo tanto, el objetivo de este trabajo fue evaluar la digestión anaerobia de la materia orgánica de...