Meilana Dharma Putra

Kinetic Modeling and Enhanced Production of Fructose and Ethanol From Date Fruit Extract

Ethanol and fructose are important materials for the fuel and food markets; high fructose syrup production processes are still costly. The effect of inoculum medium composition on the production of fructose and ethanol from dates by selective fermentation was investigated. The addition of minerals improved the fructose content in the produced syrup and ethanol productivity. The addition of malt extract to the medium increased fructose yield from 94% to 97%, but decreased ethanol yield from 78% to 69%. The presence of peptone increased ethanol productivity and fructose fraction in sugar, while iron increased fructose yield to 100% in syrups with 371 g initial sugar/L. Compared to the commonly marketed 55% fructose, selective fermentation of date extract produced sugar syrups with at least 82% fructose and significant amounts of ethanol. The excellent fit by the new expanded model prediction to the experimental data makes them valuable tools for further process development or industrial applications.

Potential waste from palm empty fruit bunches and eggshells as a heterogeneous catalyst for biodiesel production

Biodiesel is one of the potential alternative energies produced from a variety of vegetable oils. The utilization of a CaO/SiO2 catalyst generated from eggshell and palm empty fruit bunch (PEFB) waste for biodiesel production from waste cooking oil was investigated. The optimum silica yield extracted from PEFB was 68.2% using 10% NaOH (w/v) at 80xa0°C for 1 h. Methanol with a mol ratio of 14 to waste cooking oil was used. The presence of a silica support in the CaO catalyst increased the yield of biodiesel from 78% to 96%. Three runs of the catalyst led to only a 1% reduction in biodiesel yield. The utilization of activated PEFB as a support showed a potential result with a biodiesel yield of 83%. The prospective heterogeneous catalysts were also characterized by using XRD, SEM, BET and FT-IR. The developed CaO/SiO2 stands out as a promising catalyst for biodiesel production due to the utilization of abundant and cheap waste materials. Moreover, a significant yield of biodiesel was obtained using the catalyst; hence, it is feasible to be developed on a larger scale.

Extraction of chlorophyll from pandan leaves using ethanol and mass transfer study

Green pigments are used in many industrial branches including food, drinks, soap and cosmetics. Chlorophyll can substitute synthetic dyes which may affect health. Chlorophyll can be extracted from pandan leaves; the panxaddan crop grows in many tropical areas. The effects of temperature, 30–70 °C and agitation speed, 100–400 rpm on chlorophyll extraction from pandan leaves, using ethanol and the evaluation of mass transfer coefficient, using dimxadensionless analysis were investigated. The optimal conditions of extraction was obtained at 60 °C and 300 rpm; the chlorophyll concentration was 107.1 mg L -1 . The volumetric mass transfer coefficient increased with the temperature and agitation speed. Determination of volumetric mass transfer coefficient and dimxadensionless correlations are useful for further process development or industrial applications.

Facile Strategy for Surface Functionalization of Corn Cob to Biocarbon and Its Catalytic Performance on Banana Peel Starch Hydrolysis

The sulphonated biocarbon (C-SO 3 H) has been prepared from carbonization of corn cob and followed by one-step hydrothermal treatment. This research focus on characterization of C-SO 3 H and evaluate the capability of C-SO 3 H for hydrolyzed banana peel starch, and also investigate the optimum concentrations of substrate and the reaction time for hydrolysis. The C-SO 3 H was produced from corn cob (±60 mm mesh); it was carbonized at 400 °C for 1 hour. The resulting carbon was sulphonated by hydroxy ethyl sulphonic acid at 180 °C for 4 hours, and then washed with 50% methanol and water, and then resulting biocarbon was dried at 80 °C for 6 hour in oven. Based on Scanning Electron Microscopy (SEM) observation, structure morphology of corn cob was changed due to carbonization process. The C-SO 3 H after sulphonation has random pores with diameter around 3 µm–10 µm. The X-Ray Diffraction (XRD) showed increased of crystalline index of corn cob about 133% after carbonization. Analysis of EDX result for S component on C-SO 3 H is 3.79% w/w and capacity of H + is 1.447 mmol/g. The apparent peaks of -SO 3 H functional groups (1207 cm -1 and 1720 cm -1 ) on C-SO 3 H were indicated the by Fourier Transform Infra Red (FTIR). Optimum hydrolysis concentration of banana peel starch is 7% w/v for 60 min at 100 o C which Total Reducing Sugar (TRS) concentration about 0.688 mg/mL. Reusability of C-SO 3 H for 4 repeated used which showed a good performance that only 6% of decreasing activity of C-SO 3 H. The utilization of corn cob can be enhanced of corn cob and also it can be utilized as heterogeneous catalyst.

Biocomposite Materials of Eleocharis dulcis Fibers with Iron (III) Nanoparticles and Its Potential for Sasirangan Textile Wastewater Treatment

Eleocharis dulcis (Chinese water chesnut), locally Kalimantan named Purun Tikus, is a plant that grown in highly acidic swamps areas in South Kalimantan. Eleocharis dulcis (ED) , was usually used as material for traditional handicrafts. Therefore it is necessary for develop and innovate to convert the material becomes valuables. This research focus on the study of biocomposite nanoparticles of ED and its potentials as an adsorbent to reduce concentration of Pb 2+ ion, Total Suspended Solid (TSS) and color from Sasirangan textile industry wastewater. The synthesis of the biocomposite nanocomposite was made by solvothermal synthesis. Firstly, ED stemsdried was cutted to small size (250 micron), then through delignification process to eliminate lignin by 1% w/v NaOH solution. ED delignification put into hydrothermal reactor, right afterward was carried out by one-pot solvothermal reaction of 1,6-diaminohexane, iron (III) chloride hexahydrate, and ethylene glycol at 200 o C for 6 h.The process was produced two types of biocomposites, without the amino group (EDB-M) and the amino group (EDB-MH). The characterization results shown by SEM, magnetic nanoparticles have been formed on the surface of EDfiber.The ED biocomposite nanoparticles (EDB) with diameter size around 30–50 nm could be obtained. X-Ray Diffraction (XRD) analysis showed treatment of EDdelignification was increased the porosity of the fiber, shown by increased Crystalinity Index (CrI) about 72.75%. The biocomposites adsorbent, EDB-M and EDB-MH had adsorption capacity for Pb 2+ ions about 44.21 mg/g and 55.62 mg/g at equilibrium pH (pH e ) of 6 and equilibrium time of 2 hour. The effectiveness of reduced TSS was about of 91.9% and 98.1%. Beside that, the colour intensity of color was decreased about 96.7% and 97.8% for the EDB-M and EDB-MH, respectively.

Dataset on potential large scale production of biosurfactant using Bacillus sp.

Surfactants are very important in industry. The cost of commercial surfactant production is still high and the surfactant demand is constantly increasing. Microbial production of surfactant known as biosurfactant shows commercial potency. Utilization of Bacillus sp. strain on glucose fermentation for biosurfactant production was then studied. This type of microbe was isolated from soil contaminated with palm oil. The selection of the strain was based on its ability to form emulsifying zone around the colony and its capability to grow compared with those for commercial bacteria of Bacillus pumilus JCM 2508. The results showed a potentially promising strain with high biosurfactant yields and low surface tension. For further scale-up development, the microbe performance in a fermentor was compared with those in a flask and a proposed model to predict the kinetic profiles of cell mass, biosurfactant and surface tension were also described. The data presented here are related to the research article entitled “Kinetic study and modeling of biosurfactant production using Bacillus sp.” (Heryani and Putra, 2017) [1].