Author
Ragagnin de Menezes Cristiano
Bio: Ragagnin de Menezes Cristiano is an academic researcher. The author has contributed to research in topics: Biodegradation & Staphylococcus arlettae. The author has an hindex of 1, co-authored 1 publications receiving 260 citations.
Topics: Biodegradation, Staphylococcus arlettae
Papers
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TL;DR: The results provided evidence that, using a single Staphylococcus arlettae strain in the same bioreactor, the sequential microaerophilic/aerobic stages were able to form aromatic amines by reductive break-down of the azo bond and to oxidize them into non-toxic metabolites.
284 citations
Cited by
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TL;DR: This review summarises the methodologies used to evaluate the toxicity of azo dyes and their degradation products and discusses the recent studies on the decolouration or degradation using algae, yeast, filamentous fungi and bacteria, genetically modified microorganisms and microbiological systems combined with Advanced Oxidation Processes and Microbial Fuel Cells.
672 citations
TL;DR: The textile sector is 14% of total industrial production in India and contributes to about 4% of the gross domestic product and earns about 27% of India's total foreign exchange.
Abstract: The textile sector is 14% of total industrial production in India and contributes to about 4% of the gross domestic product and earns about 27% of India's total foreign exchange. Worldwide, up to 1...
465 citations
TL;DR: The present review paper elucidates the contributions of membrane technology towards textile effluent treatment and unexhausted raw materials recovery and various accounts dealing with techno-economic evaluation of these membrane based textile wastewater treatment processes have been provided.
392 citations
TL;DR: In the present review the decolorization and degradation of azo dyes by fungi, algae, yeast and bacteria have been cited along with the anaerobic to aerobic treatment processes.
Abstract: The synthesis of dyes and pigments used in textiles and other industries generate the hazardous wastes. A dye is used to impart color to materials of which it becomes an integral part. The waste generated during the process and operation of the dyes commonly found to contain the inorganic and organic contaminant leading to the hazard to ecosystem and biodiversity causing impact on the environment. The amount of azo dyes concentration present in wastewater varied from lower to higher concentration that lead to color dye effluent causing toxicity to biological ecosystem. The physico-chemical treatment does not remove the color and dye compound concentration. The decolorization of the dye takes place either by adsorption on the microbial biomass or biodegradation by the cells. Bioremediation takes place by anaerobic and/or aerobic process. The anaerobic process converts dye in toxic amino compounds which on further treatment with aerobic reaction convert the intermediate into CO2 biomass and inorganics. In the present review the decolorization and degradation of azo dyes by fungi, algae, yeast and bacteria have been cited along with the anaerobic to aerobic treatment processes. The factors affecting decolorization and biodegradation of azo dye compounds such as pH, temperature, dye concentration, effects of CO2 and Nitrogen, agitation, effect of dye structure, electron donor and enzymes involved in microbial decolorization of azo dyes have been discussed. This paper will have the application for the decolorization and degradation of azo dye compound into environmental friendly compounds.
313 citations
TL;DR: The results of toxicity studies suggest that this consortium may effectively be used for complete detoxification of dye and effluent and has potential environmental implication in cleaning up azo dyes containing effluents.
216 citations