RESUMEN
Batch studies were conducted on degradation of anaerobically digested distillery wastewater by three bacterial strains, viz. Xanthomonas fragariae, Bacillus megaterium and Bacillus cereus in free and immobilized form, isolated from the activated sludge of a distillery wastewater treatment plant. The removal of COD and colour with all the three strains increased with time up to 48 hr and only marginal increase in COD and colour removal efficiency was observed beyond this period up to 72 hr. After this period removal efficiency remained fairly constant up to 120 hr. The maximum COD and colour removal efficiency varied from 66 to 81% and 65 to 75%, respectively for both free and immobilized cells of all the three strains. The strain Bacillus cereus showed the maximum efficiency of COD (81%) and colour (75%) removal out of the three strains. An interrelationship between the percent COD and colour removal was carried out by correlation and regression analysis and was justified by high values of coefficient of correlation (r = 0.99) for all the cases. The first order removal rate kinetics was also applied and rate constants were evaluated for COD and colour removal efficiencies.
Asunto(s)
Bebidas Alcohólicas , Alginatos/química , Bacillus cereus/aislamiento & purificación , Bacillus megaterium/aislamiento & purificación , Biodegradación Ambiental , Portadores de Fármacos/química , Ácido Glucurónico , Ácidos Hexurónicos , Microbiología Industrial/métodos , Residuos Industriales , Dicromato de Potasio/metabolismo , Factores de Tiempo , Eliminación de Residuos Líquidos/métodos , Contaminantes Químicos del Agua/metabolismo , Xanthomonas/aislamiento & purificaciónRESUMEN
Three bacterial isolates from the activated sludge of a distillery wastewater treatment plant identified as Xanthomonas fragariae, Bacillus megaterium and Bacillus cereus were found to remove COD and colour from anaerobically digested distillery wastewater in the range of 55 to 68% and 38 to 58% respectively.