Growth Pattern of Saccharomyces Cerevisiae in Cassava Mill Effluents - Growth Pattern of Saccharomyces Cerevisiae in Cassava Mill Effluents - Open Access Pub

Nigeria is the world leading producer of cassava. During processing of gari from cassava tuber large volume of effluents are discharged in the environment which is toxic to the environment and some of its associated biota. This study evaluated the growth pattern of Saccharomyces cerevisiae in cassava mill effluents. The Saccharomyces cerevisiae was isolated from palm wine following standard microbiological procedure. The Saccharomyces cerevisiae was inoculated into the sterile effluents and incubated for 15 days. At every 3days interval, 1ml of the effluents was obtained from the medium and the population density determined. Results of the growth showed that the population of Saccharomyces cerevisiae were 0.00 x 106 cfu/ml at day 0 (without inoculum), which rose to 2.88 x 106 cfu/ml at day 3, 272.67 x 106 cfu/ml at day 12 and decline slightly at day 15 (13.57 x 106 cfu/ml). There was significant variations (P<0.05) among the various period of study. The study showed that the growth of Saccharomyces cerevisiae in the effluent was optimum at day 12, then after the density began to decline. DOI10.14302/issn.2637-6075.jpae-18-2349 The level of environmental degradation has been on the increasing trend probably due to human activities on the environment and to lesser extent by natural phenomenon 1, 2, 3, 4, 5. The degradation of the environment (e.g air, soil, sediment and water quality) often affect different life forms in such ecosystem. Authors have reported that human activities is having an impacts on the population status of biodiversity including mammals, amphibians, fisheries, reptiles, birds, vegetation/plants among others 6, 7, 8, 9. Several human activities that impact on the soil including municipal solid wastes that are poorly managed in many developing countries 10, food processing effluents such as oil palm processing wastewater 11, 12 and cassava mill effluents 1, 2, 3, wastes emanating from markets 22, 23, 24, slaughterhouse25etc. These wastes stream have the tendency to alter the characteristics of the receiving soil. Basically Nigeria is the global leading cassava producing countries 14, 15, 16, 17, 18, 19, 20, 21. The cassava production in Nigeria has exceeded the combined production of second (Thailand) and third (Indonesia) largest cassava production countries in the world. In Nigeria, significant portion of the cassava tuber produced is used to produce gari and to lesser extent fufu, lafun, animal feeds and other industrial purposes such as adhesives, etc 26. The cassava mill effluents generated during cassava processing in Nigeria are