检索结果-南通市图书馆

Modeling and optimization of Terminalia catappa *** oil extraction using response surface methodology and artificial neural network

引用

Artificial Intelligence in Agriculture 2020年第1期4卷 1-11页

作者： chinedu Matthew Agu Matthew chukwudi Menkiti Ekwe Bassey Ekwe albert c.ibuzor agulanna chemical Engineering Department Nnamdi Azikiwe UniversityAwkaNigeria Mechanical Engineering Department Gregory UniversityUturuNigeria Materials and Energy Technology Department Projects Development Institute(PRODA)Emene Industrial AreaEnuguNigeria

In this study,response surface methodology(RSM)and artificial neural network(ANN)were used to optimize Terminalia catappa *** oil(TcKO)*** extraction method was used for the oil extraction,with n-hexane as the extracting *** highest oil yield was obtained at 55℃,150 min,and 0.5 *** physicochemical properties of the TcKO were determined using standard *** chromatographic(Gc)analysis and Fourier Transform Infrared(FTIR)were respectively,used to determine the fatty acid composition and prevalent functional groups in *** optimum conditions of temperature,particle size and extraction time,the RSM predicted oil yield was 62.92%,which was validated as 60.34%,whereas ANN predicted yield was 60.39%,which was validated as 60.40%.The results of the physicochemical characterization of TcKO showed that the dielectric strength(DS),viscosity,flash and pour points values were 30.61 KV,20.29 mm^2 s^−1,260°c,and 3℃,*** characterization and FTIR results of TcKOindicated its potential industrial application,especially as transformer *** acids compositions result indicated that the oil was highly unsaturated;while XRD results of Terminalia catappa ***(TcK)samples obtained,both before and after extraction,showed difference in their peaks and corresponding intensities,due to the damage effect of ***,the obtained optimization results indicated that ANN was a better and more effective tool than RSM,due to its higher R^2 and lower RMS values.

关键词： Response surface methodology Artificial neural network Optimization Terminalia catappa L.kernel

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Influence of Polyphosphate Hydrolysis on the Degradation of Volatile Fatty Acids (VFAs) in Anaerobic Digestion

引用

Advances in chemical Engineering and Science 2017年第4期7卷 439-449页

作者： Ikechukwu Maxwell Onoh Gordian Onyebuchukwu Mbah albert chibuzo agulanna chemical and Bioprocess Engineering Department Hamburg University of Technology (TUHH) Harburg Germany chemical Engineering Department Enugu State University of Science and Technology (ESUT) Enugu Nigeria Materials and Energy Technology Department Projects Development Institute (PRODA) Emene Industrial Area Enugu Nigeria

The degradation rate of Volatile Fatty Acids (VFAs) produced predominantly in the acidogenesis stage is a key process parameter to be optimised to ensure a successful Anaerobic digestion (AD). Thermodynamically, the oxidation of the VFAs are energetically unfavourable, and as such external energy source apart from the energy derived from the hydrolysis of Adenosine Triphosphate (ATP) is needed for the initial activation of the VFAs, initial growth of the methanogens in AD process and improved degradation rate of the VFAs. Thus, this research investigated the influence of polyphosphate hydrolysis on the degradation rate of the VFAs at high concentration. Sodium-propionate, Sodium-butyrate and Sodium-acetate salts were added at the start of experiments in order to increase the concentration of the VFAs. The polyphosphate salts used were;Na-hexametaphosphate, Na-tripolyphosphate and potassium pyrophosphate. The control experiment was polyphosphate free and three process parameters (degradation rate, cumulative biogas production and specific methane content) of anaerobic digestion were investigated. The experiments were carried out at a mesophilic temperature of 37.5°c for 41 days. The results of the investigation showed that the treated reactors with the polyphosphate salt solution in low concentration performed better than the reactors with high concentration of the polyphosphate salts solution. All the treated reactors with poly-P salts performed better than reactor Nr-9 (control experiment), but reactor Nr-1 was outstanding with an improved degradation rate of 47%, cumulative biogas production of 21% and specific methane content of 23%.

关键词： Volatile Fatty Acids (VFAs) Polyphosphate Salts Anaerobic Digestion Bioenergetics Syntrophic Degradation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：