检索结果-内蒙古大学图书馆

Desalination Process via Pervaporation of Wetland Saline Water

IOP Conference Series: Earth and Environmental Science 2018年第1期175卷

作者： Muthia Elma Hairullah Zaini Lambri Assyaifi Chemical Engineering Study Program Engineering Faculty Lambung Mangkurat University (ULM)Banjarbaru Indonesia

Water is a very important resource for life on earth. Nowadays, water scarcity is a big issue around the world. Especially people who live in wetland areas, river is an important water source for their daily life. Unfortunately, the water becomes salty due to seawater intrusion into the river. The objective of this work is to apply desalination via pervaporation process of wetland saline water using pure silica membranes employ TEOS (tetraethyl orthosilicate) as a precursor. A two-step acid-base catalysed method has been applied to produce silica sols. The pure silica membranes were calcined under RTP (Rapid Thermal Process) method at 600°C for 1 hour. The various temperatures (20, 40 & 60 °C have been set in pervaporation set up in order to investigate the performance of silica membranes. It was found that at high temperature, silica membranes start to densify and give the lowest rejection compare to lower temperatures (84.9 %). In contrary, there was 100% of water flux increases when the feed temperature increases (from 0.61 to 1.19 kg m-2 h-1)

关键词：

来源：评论

学校读者我要写书评

暂无评论

Molecular docking bioactive compound from Strobilanthes crispus to decrease cholesterol levels

引用

AIP Conference Proceedings 2021年第1期2376卷

作者： Rita Arbianti Amalia Larasati Tania Surya Utami Yuswan Muharam Slamet Bioprocess Engineering Study Program Department of Chemical Engineering Universitas Indonesia Depok. Indonesia

Hypercholesterolemia is a disease caused by an increase in the concentration of cholesterol in the blood. One non-pharmacological treatment using herbal plants such as Strobilanthes crispus. This plant has flavonoid and phytosterols content that has been proven to reduce cholesterol levels in the blood. In this study, molecular docking was conducted to screen for the bioactive compounds that correspond to the interaction of the protein. Quercetin and β-sitosterol compounds are then docked using Autoodock Tools-1.5.6 to see the results of their affinity score for the HMG-CoA reductase enzyme. The affinity results obtained from quercetin, β-sitosterol and reference compounds (simvastatin) are -7.8 kcal/mol; -7.1 kcal/mol; and -6.1 kcal/mol. This shows that quercetin has the best affinity score for the inhibition of HMG-CoA reductase enzyme when compared with β-sitosterol and reference compounds.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Silica Membranes for Wetland Saline Water Desalination: Performance and Long Term Stability

引用

IOP Conference Series: Earth and Environmental Science 2018年第1期175卷

作者： Muthia Elma Nur Riskawati Marhamah Chemical Engineering Study Program Engineering Faculty Lambung Mangkurat University (ULM) Banjarbaru Indonesia

In this study, silica thin film pH=6 (precursor TEOS:tetraethyl ortosilicate) developed from sol gel process and deposited (2 layers) directly onto alumina substrate(tubular support with 100 nm pore size) without depositing interlayer (interlayer-free).Then, the desalination process via pervaporation was applied to test the membranesperformanceusing artificial saline water and wetland saline water. Results show the decrease of water flux (1.9 to 1.43 kg m-2 h-1) and salt rejection(97 to 95%) when using artificial salty water (0-7.5 wt%) and the long-term stability of silica membrane was stable at 1.7 kg m-2 h-1 for over 100 hours when using wetland saline water as a feed.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Isolation of prebiotic inulin from Gadung Aceh tuber (Dioscorea Hispida) using hydrolysis reaction

引用

IOP Conference Series: Materials Science and engineering 2020年第1期725卷

作者： A D Putri E Kurniasih U Hasanah Rahmawati Department of Chemical Engineering Study Program of Industrial Chemical of Technology 2015 Polytechnic State of Lhokseumawe Aceh

The goal of this research to identifity inulin compounds in Aceh gadung tuber (Dioscorea Hispida) by using hydrolysis method with variations hydrolysis time 30 minutes; 60 minutes; 90 minutes and hydrolysis temperature 70°C; 80°C. Inulin is a group of carbohydrate that are prebiotic. Inulin is usually use a substitute for fat and sugar in low calorie food product. The hydrolysis method used can convert the carbohydrate from tuber starch to glucose and also convert it to simple sugar that is fructan. The analysis in this research is detected inulin function group by analysis Fourier Transform Infrared Spectroscopy (FTIR) and yield of crystal inulin. Isolation inulin used material and solvent (1:5) can obtained the best treatment of isolation inulin is operating condition at hydrolysis temperature 70°C by hydrolysis time 60 minutes, in this condition the yield of crystal inulin is 42%.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Optimization of Eco-Friendly Extraction and Effect of Ph on Betalain Color Properties from Dragon Fruit (Hylocereus Undatus) Peels

SSRN

引用

SSRN 2023年

作者： Permana, Lasuardi Sriprom, Pongsert Manamoongmongkol, Kanjana Phumjan, Lamphung Assawasaengrat, Pornsawan School of Food Industry King Mongkut’s Institute of Technology Ladkrabang Bangkok10520 Thailand Program of Food Process Engineering School of Food Industry King Mongkut’s Institute of Technology Ladkrabang Bangkok10520 Thailand Department of Chemical Engineering School of Engineering King Mongkut’s Institute of Technology Ladkrabang Bangkok10520 Thailand Study Program of Food Technology Institut Teknologi Sumatera Lampung35365 Indonesia

In this study, betalain was extracted from dragon fruit peels using a safe and environment-friendly aqueous solvent. This study investigated the effects of different pH levels, temperatures, times, and solid-to-liquid ratios on the extraction of betalain from dragon fruit peels using the Box-Behnken design as a response surface methodology. Additionally, the effect of betalain extract at pH 2.0 – pH 7.0 was examined. The results showed that the solid-to-liquid ratio had the most significant impact on betacyanin extraction as major composition of betalain in dragon fruit peels. The optimal extraction conditions were determined to be a pH of 3.6, temperature of 30°C, extraction time of 10 min, and a solid-to-liquid ratio of 1:15. The expected betacyanin content under these conditions was 72.47 mg/L. A significant change in the CIELAB parameter of the extracted betalain was observed, with marked differences in the L*, a*, and b* values as the pH increased. This color change may be attributed to the degradation of betacyanin to betalamic acid. This study demonstrates the potential of a safe and eco-friendly process for extracting betacyanin from this agricultural waste material. © 2023, The Authors. All rights reserved.

关键词： Extraction

来源：评论

学校读者我要写书评

暂无评论

Production of bioinsecticide from durian peel waste and Dioscorea hispida tuber extract by ultrasonic-assisted extraction

引用

AIP Conference Proceedings 2024年第1期2710卷

作者： Hasna Nisrina Sumayyah Widya Rahmanisa Fitri Tania Surya Utami Rita Arbianti Bioprocess Engineering Study Program Department of Chemical Engineering Faculty of Engineering University of Indonesia Depok 16424 Indonesia

A new armyworm (Spodoptera frugiperda) is rapidly spreading and causing damage to corn crops in Indonesia, thus prompting the need to control the pest with an effective, yet environmentally friendly pest control method, such as bioinsecticide. Natural raw materials like durian peel waste and Dioscorea hispida tuber can be processed to produce a natural bioinsecticide. To discover the optimum processing condition for bioinsecticide production, research is conducted to find the effective solvent material and concentration in ultrasonic-assisted extraction methods. Durian peel waste is extracted using ethanol 30% and methanol 70% as solvents with the ratio variation of 1:0, 0:1, 1:1, 1:2, 2:1. Meanwhile, Dioscorea hispida tubers are extracted with various ethanol concentrations as solvents (ethanol 50%, 70%, 80%, absolute, and distilled water). The result shows that the most effective solvent for durian peel waste extraction is a 2:1 ratio of ethanol and methanol, with the optimum yield of 12.58%. The result also shows that Dioscorea hispida tuber is best extracted with distilled water, yielding 34.70%. The efficacy test concludes that the best solvent variation for pest elimination is a 0:1 ratio of ethanol and methanol durian peel waste and ethanol 80% for Dioscorea hispida tuber. The LC-MS/MS test results identified that alkaloid, flavonoid, and fatty acid compounds potentially caused larvae mortality.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The combined process of pyrolysis and catalytic cracking of rice straw using ZSM-5 and γ-Al2O3 catalyst prepared by physically mixing

引用

Journal of Physics: Conference Series 2019年第6期1198卷

作者： Aji S Nugraha RM Ivan Pratama Setiadi T S Utami Department of Chemical Engineering Chemical Engineering Study Program Universitas Indonesia Kampus Baru UI Depok West Java Indonesia

Rice straw contains high lignocellulose so it can be used as a raw material for producing bio-oil through pyrolysis process. The combined with catalytic cracking, the product of bio-oil could be shifted to the certain compound toward cyclohexene selectively using catalyst. Cyclohexene is important compound as the precursor of bio-polymer adipic acid that the route lead to the manufacture of nylon 6,6. This study is to give insight the possibility to produce cyclohexene from rice straw as renewable source material with variation of catalyst composition and the temperature. The ZSM-5/γ-Al2O3 catalyst composition is varied to observe the effect on its product distribution mainly on the influence in producing the target products. By this way, the optimum catalyst composition to maximize the target products could be confirmed. The bio-oil product and the product of catalytic cracking were characterized by Gas Chromatography Mass Spectroscopy (GC-MS). The result showed that the using of catalyst composition with 60% ZSM-5 and 40% Al2O3, the yield of cyclohexene up to 61.12% has been achieved as the main product under pyrolysis condition of 425°C in the atmospheric condition with 80 ml/min nitrogen flowrate.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Product distribution from catalytic conversion of biomass over B2O3/γ-Al2O3 catalyst

引用

IOP Conference Series: Earth and Environmental Science 2018年第1期105卷

作者： Setiadi Ervandy Haryoprawironoto Department of Chemical Engineering Chemical Engineering Study Program Universitas Indonesia Kampus Baru UI Depok West Java Indonesia

The catalytic conversion of biomass has been studied by using a conventional fixed-bed reactor. The mixed catalyst is prepared by impregnation method followed by calcination of the catalyst. The B2O3/γ-Al2O3 catalyst composition used in the biomass catalytic conversion process is varied to study the effect on its product distribution. In addition, catalyst variations were performed to test the catalytic effect in producing the target products, so that the optimum catalyst composition to maximize the target products is known. The catalyst composition of B2O3 in the mixed catalyst used was 0%, 5%, 10%, 20%, and 25% wt. The use of B2O3/γ-Al2O3 mixed catalyst can convert the small oxygenate compounds produced at the thermal decomposition step of biomass into aromatic hydrocarbon compounds. In addition, other groups of compounds were also observed with different product distributions where the differences were affected by the composition of the mixed catalyst used. Experimental results show that addition of B2O3 content up to 20% wt gives the highest catalytic effect with the main product being aromatic hydrocarbons. The decrease in catalytic effect occurs with the addition of 25% wt B2O3 content.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Estimation of energy and organic fertilizer generation from small scale tapioca industrial waste

引用

IOP Conference Series: Earth and Environmental Science 2019年第1期230卷

作者： U Hasanudin M E Kustyawati D A Iryani A Haryanto S Triyono Study Program of Agro-industrial Technology Faculty of Agriculture University of Lampung Lampung Indonesia Study Program of Chemical Engineering Faculty of Engineering University of Lampung Lampung Indonesia Study Program of Agriculture Engineering Faculty of Agriculture University of Lampung Lampung Indonesia

The main of tapioca industrial wastes are cassava fiber, cassava skin, and wastewater. To increase the revenue of tapioca industry, cassava fiber was also extracted to produce energy and the effluent of biogas plant was utilized as organic fertilizer. The aims of this research were to estimate energy generation from tapioca wastewater and cassava fiber and also to estimate Nitrogen and Phosphorous potential from the effluent of biogas plant. This research was conducted in a tapioca factory which was equipped with biogas plant, in Lampung Province, Indonesia. Concentration of COD (chemicals Oxygen Demand), Total Nitrogen (TN) and total Phosphorous (TP) were measured in the inlet and outlet of biogas plant. Enhancement of biogas production from cassava fiber was also estimated. Flow rate of wastewater and cassava fiber production were also measured. Wastewater generation is 2.75 m3/ton of cassava with COD 9,647.5 mg/l. Electricity production was estimated about 29.96 kWh and 30.44 kWh per ton of cassava from the wastewater and cassava fiber, respectively. The observed tapioca factory could be fulfilling energy needs for drying tapioca process if they utilized wastewater and cassava fiber. The effluent of biogas plant also still has potential to produce about 1.15 and 0.05 kg of TN and TP per ton of cassava, respectively.

关键词：

来源：评论

学校读者我要写书评

暂无评论

The treatment of Raw Water Sources of Drinking Water using Chitosan/Mg/Al–LDH Composites: Problem cases in Municipal Waterworks in Banjarmasin

引用

IOP Conference Series: Earth and Environmental Science 2020年第1期506卷

作者： C Irawan M W Ramadhan I F Nata M D Putra Chemical Engineering Study Program Engineering Faculty Lambung Mangkurat University Banjarbaru South Kalimantan Indonesia

A study was done on treatment of raw water sources for drinking water using chitosan/Mg-Al LDH (CS/Mg/Al–LDH) composites by adsorption process. An analysis on the adsorbent characterizations of FTIR, SEM and XRF showed that the CS/Mg/Al–LDH had many different functional groups and a high specific surface area for adsorption processes. The CS/Mg/Al–LDH showed high adsorption uptake capacity and selectivity for iron (Fe), turbidity, and colour in the raw water sources for drinking water in Municipal Waterworks in Banjarmasin. Therefore, the CS/Mg/Al–LDH composites have the potential to be used as an adsorbent in water and wastewater treatment.

关键词：

来源：评论

学校读者我要写书评

暂无评论

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

请选择保存的检索档案：

请选择收藏分类：

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

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

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：