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Optimization and kinetic studies for enzymatic hydrolysis and fermentation of colocynthis vulgaris shrad seeds shell for bioethanol production

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Journal of Bioresources and Bioproducts 2021年第1期6卷 45-64页

作者： Igwilo Christopher Nnaemeka Egbuna samuel O Onoh Maxwell I Asadu OChristain onyekwulu chinelo s Department of science Laboratory Technology Federal College of AgricultureP.M.BIshiaguEbonyi StateNigeria Department of Chemical Engineering Enugu state University of science and Technology (ESUT)Nigeria Gregory University Uturu PMB 1012 Abia State Nigeria

The key process parameters for the hydrolysis and fermentation of Colocynthis vulgaris shrad seeds shell(CVsss)were optimized using the Box-Behnken Design(BBD)of Response surface Methodology(RsM).Kinetic study was also carried *** proximate analysis of the CVsss was done by the method of the Association of Organic and Applied Chemistry(AOAC).Enzymatic hydrolysis was experimented by using Aspergillus Niger as a crude enzyme isolated from soil at sawdust dump site and screened for cellulosic *** that affected the hydrolysis of the CVsss were screened by using the Greco-Latin square design of ***,for saccharomyces cerevisiae,factors that affected the fermentation of the CVsss were screened by using the same Greco-Latin square design of ***,the result of the proximate analysis revealed that the CVsss had 73.54%cellulose which could be converted to *** was established that temperature,pH and time had significant effect on hydrolysis,while the optimum results were obtained at 46.8℃,3.32 d,5.68 and 59.87%for temperature,time,pH and glucose yield,***,yeast dosage,pH and time had significant effect on fermentation,while the optimum results from optimization were found to be 33.58℃,7.0,3.55 d,1.65 g per 50 mL and 25.6%for temperature,pH,time,yeast dosage and ethanol yield,*** kinetics of both the enzymatic hydrolysis and fermentation agreed with the Michealis-Menten kinetic model with the correlation coefficients(R^(2))of 0.9708 and 0.8773,***,from the error analysis,the experimental and predicted values had a very good relationship as described by Michaelis-Menten model.

关键词： Ethanol Melon(Egusi)seed shell Hydrolysis Fermentation Optimization Kinetics

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Evaluation of the Level and Impact of selected Physiochemical Parameters of Fertilizer Effluent on Obinna River, Adani, Enugu state, Nigeria

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Journal of Water Resource and Protection 2014年第7期6卷 722-730页

作者： Chizoba chinelo Agu Matthew Chukwudi Menkiti Bernard Ibezim Okolo Patrick Chukwudi Nnaji Center for Environmental Management and Control (CEMAC) University of Nigeria Enugu Nigeria Department of Chemical Engineering Michael Okpara University of Agriculture Umudike Nigeria Department of Chemical Engineering Nnamdi Azikiwe University Awka Nigeria

This work quantitatively evaluates the level and impact of selected physiochemical properties of fertilizer effluent on the Obinna River of Adani, Enugu state, Nigeria. The fertilizer effluent originated from surrounding farms and flushed into the Obinna River. Water samples were collected from designated points along the river and analysed for physical, chemical and biological properties using standard methods of APHA. Impact of selected key parameters such as nitrate, phosphate, manganese, dissolved oxygen, biochemical oxygen demand and heavy metals (lead, iron and manganese), was studied. The results of the parameters were compared with the World Health Organisation (WHO) permissible standard for freshwater. Measured concentrations of phosphate (5.00, 7.21, 3.92 mg/L), manganese (1.53, 1.18, 1.47 mg/L) and lead (18.9, 21.7, 39.7 ppm) were found to be above the WHO standard while nitrate (0.04, 0.03, 0.03 mg/L) and iron (0.001, 0.001, 0.1 mg/L) were within the standard. The mean concentrations of heavy metals increased in the following order: Fe (0.034) 1 to downstream s3, with manganese and lead being above WHO standard. The results showed a level of significance for the chi-square distribution and correlation coefficients while the analysis of variance (ANOVA) results was conflicting. It could be inferred that the impact of the selected parameters contributed to the pollution of Obinna River.

关键词： Physiochemical Heavy Metals WHO Pollution Obinna River

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Under the Udala Trees

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ChinAfrica 2016年第1期8卷 60-60页

作者： chinelo Okparanta

Finding Them Gone： Visiting China＇s Poets of the Past By Red PineCopper Canyon PressBill Porter, also known as Red Pine, an American travel writer who once worked as a radio commentator in Hong Kong, is widely recognized as one of the world＇s preeminent translators of Chinese poetry and religious texts, To pay homage to China＇s greatest poets, he traveled throughout China visiting dozens of poets＇ graves and performing rituals that featured Kentucky bourbon and reading poems aloud to the spirits.

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