The Optimization Of Cellulose Content In Tobacco Stems (Nicotiana tabaccum L.) With Acid Extraction Method And Alkaline Extraction Method

Tobacco stems are the agricultural waste of tobacco crops that have the potential to be utilized. Use of tobacco stems in general, only in the leave of disposal without handling. Tobacco stems have the opportunity as a source of cellulose because they have a relatively high content of cellulose. The use of proper methods also plays an important role in extracting cellulose on tobacco stems. The research aims to determine the efficiency levels of cellulose extract from tobacco stems (Nicotiana tabaccum L.) with acid extraction methods and alkaline extraction. The research used a complete randomized design with a repeated trial of 2 times. The results showed the alkaline method of producing the best results against the rendemen testing parameters, water content, hemicellulose content, cellulose content, lignin content and FTIR spectroscopy. Yield test, moisture content, hemicellulose content, cellulose content and lignin content was at the best in the alkaline extraction with a concentration of 12% the yield of 43.63%; water content of 7.54%; hemicellulose content 14.33%; cellulose content 46.17%; and 2.83% lignin content. FTIR spectroscopy test shows that all treatments have important and specific function groups on cellulose such as – OH, C-H, and-CH2, so that samples were identified of cellulose.

CHARACTERIZATION OF SPONGE-GOURD RESIDUE PRETREATED BY MECHANICAL DISC REFINING

The present works describes the effect produced by mechanical disc refining in the pretreatment of lignocellulose agro-industrial waste, using scraps of sponge gourd. Two batches of sponge gourd scraps were refined in a laboratory disc refiner, at a consistence of 2.9 wt% (fiber/water) and residence time of 2 and 4 min. The two batches were then coded as MRS and HRS, respectively. MRS and HRS samples, as well as non-refined sponge gourd (NRS), were characterized in terms of morphological aspects, structural characteristics and thermal behavior. The analysis of SEM micrographs revealed that internal fibrillation dominated the refining process of sponge gourd, which, consequently, led to an increased surface area of the fibers. It was observed that the use of the disc refiner promoted the extraction of some hemicellulose content, increased the devolatilization index to 70% and 60%, as well as crystallinity – to 22% and 31% for MRS and HRS, respectively.

Waste to Energy: Calorific Improvement of Municipal Solid Waste through Biodrying

Municipal solid waste (MSW) is an energy resource with sufficient energy/calorific value, making it a suitable substitute for fuel. This study investigated the effect of air flow rate on the MSW calorific value, the hemicellulose content, and the MSW degradation rate in a biodrying process. Four biodrying reactors equipped with flowrate and temperature recorders were used in the study. The air flow rate was varied as follows: 0 L/min/kg, 2 L/min/kg, 4 L/min/kg, and 6 L/min/kg, corresponding to reactors R1, R2, R3, and R4, respectively. The calorific value, water content, hemicellulose content, organic C content, and total N were measured on day 1, day 15, and day 30. The results showed that the biodrying process could increase the calorific value by 55.3 %, whereas the control reactor could increase the calorific value by only 4.7 %. The highest calorific value was 17.63 MJ/kg, at an air flow rate of 4 L/min/kg. The air flow rate had a significant effect on increasing the calorific value (sig.<0.05). The highest temperature in the biodrying process was 41 °C. The final MSW moisture content was 27.28 %, resulting from R4. According to the statistical test results, the air flow rate had a significant influence on the water content parameters. Hemicellulose degradation due to air flow rate reached 80–85 %. The air flow rate did not significantly influence the hemicellulose degradation (sig.>0.05). The biodrying process is the suitable method to increase the calorific value of MSW while reducing its water content; thus, the process promotes the realization of waste to energy as refuse-derived fuel.

Dietary Fiber Profiling of Different Parts of Burmese Grape (Baccaurea ramiflora) and Their Application

The present study was conducted aiming at isolation and profiling of the crude dietary fiber (DF) (cellulose, hemicellulose, and pectin) from different parts (seed and peel) of the Burmese grape; a local fruit containing numerous health benefits. The extracted and purified fiber was added to yogurt and the sensory quality of the potential prebiotic yogurt was assessed. Major parts of the Burmese grape are seed, peel, and pulp with a calculated portion of around 19.44%, 36.11%, and 44.45% respectively of the whole fruit. Alcohol Insoluble Solids (AIS) were isolated and found at a level of 51.80% and 72.48% in the seed and peel respectively. The polysaccharides of the AISs were fractionated by extracting sequentially with suitable solvents into cellulose, hemicellulose, and pectin. The extracted pectin, hemicellulose, and cellulose were found to be 38%, 11.56%, and 40% from the peel and 21.24%, 23.36%, and 36.92% from the seed respectively. The extracted crude DF was then purified and the final content of the pectin, hemicellulose, and cellulose in the peel was found as 7.63%, 2.92%, and 32.19% and in seed 3.04%, 1.26%, and 6.34% respectively. Among all the extracted and purified DF, the hemicellulose content was the lowest and the cellulose content was the highest both in peel and seed. The purified DF was added to yogurt at a level of 0%, 1%, 1.3%, and 1.5%, to prepare a control and three potential prebiotic yogurt samples. Despite having potential health benefits of prebiotic yogurt, participated panelists preferred control one during sensory evaluation compared to the dietary fiber added yogurt.

KOMPONEN KIMIA KAYU TRUBUSAN JATI UNGGUL NUSANTARA (Tectona grandis Linn.f.) PADA BAGIAN PANGKAL, TENGAH DAN UJUNG

Chemical Component of Copies Superior Teak (Tectona grandis Linn.f)in Base, Center and Edge StemTeak (Tectona grandis, Linn. f) is one of the plants that is able to make a real contribution in providing wood raw materials in the timber industry. The limited availability of quality teak wood on the market so that the craftsmen use superior teak wood. The amount of the superior teak wood has not been known yet. Therefore, a study was carried out on the level of wood chemical components of five-year-old superior teak wood based on the height of the stem (base, middle and end), so that the suitability of wood usage can be known. Based on the results of the study the levels of chemical components in wood superior teak of age five years, the highest levels of extractive substances found at the end of the stem by 8.56%, the highest percentage of levels of holocellulose and cellulose found in the middle part of the stem with a content of 63.95% and 39.99%, the percentage of hemicellulose content 29.66% and the highest percentage of lignin content found in the base part with levels of 30.52%. This superior teak wood can be used as construction materials such as plywood, woodworking wood, lamina wood and artificial boards.Keyword: Tectona grandis, Thrubus, Extractive Subtances, Holocellulose, Cellulose, Lignin.ABSTRAKTanaman Jati (Tectona grandis, Linn. f) merupakan tanaman yang berkontribusi di bidang industri perkayuan. Terbatasnya ketersediaan kayu jati berkualitas di pasaran mengakibatkan industri perkayuan menggunakan kayu jati unggul. Kayu trubusan jati unggul tersebut belum diketahui bagaimana komponen kimianya. Oleh karena itu, dilakukan penelitian mengenai kadar komponen kimia kayu trubusan jati unggul yang berumur lima tahun berdasarkan ketinggian batang (pangkal, tengah dan ujung), sehingga dapat diketahui kesesuaian penggunaan kayu. Berdasarkan hasil penelitian kadar komponen kimia pada kayu trubusan jati unggul umur lima tahun, rata-rata kadar zat ekstraktif tertinggi terdapat pada bagian ujung batang sebesar 8,56%, persentase tertinggi kadar holoselulosa dan selulosa terdapat pada bagian tengah batang dengan kadar 63,95% dan 39,99%, persentase kadar hemiselulosa 29,66%, dan persentase tertinggi kadar lignin terdapat pada bagian pangkal dengan kadar 30,52%. Kayu trubusan jati unggul ini dapat digunakan sebagai bahan konstruksi seperti kayu lapis, kayu pertukangan, kayu lamina dan papan buatan.Kata Kunci: Tectona grandis, Thrubus, Zat Ekstraktif, Holoselulosa, Selulosa, Lignin.

Preparation and Characterization of Hemicellulose Films from Sugarcane Bagasse

Hemicellulose is one of the most common polysaccharides found in nature. Its use as a green and sustainable raw material for industries is desirable. In this work, an alkaline-alcoholic method was used to extract hemicelluloses from sugarcane bagasse. After extraction, films with 2%, 3% and 4% (w/v) hemicellulose were produced. The films’ morphology, thickness, water solubility, tensile properties and thermal stability were evaluated. The Fourier Transform Infrared Spectroscopy (FTIR) results reveal that the method used removes the hemicellulose from bagasse with a low concentration of lignin. The films presented a compact and dense structure with uniformity in thickness associated with higher solubility in water. The increase in hemicellulose content increased tensile strength, but reduced the tensile strain of the films. Thermogravimetric analysis indicated that the increase in hemicellulose content reduced the films’ thermal stability. Thus, these films may act as useful, biodegradable and environmentally friendly materials for engineering applications.

Effect of steam explosion of oil palm frond and empty fruit bunch on nutrient composition and ruminal fermentation characteristics

In this study, we evaluated the effect of steam explosion of oil palm frond (OPF) and oil palm empty fruit bunch (EFB) on nutrient composition and ruminal fermentation characteristics in vitro. The results showed that steam explosion decreased NDF (P < 0.01), ADF (P < 0.01), and hemicellulose content (P < 0.01) in OPF and EFB. Steam explosion improved the effective energy value of OPF and EFB. In vitro fermentation results revealed that 72-h gas production capacity of OPF and EFB increased by 12.60and 85.06% (P < 0.01), respectively, after steam explosion. Steam explosion had a tendency to improve the concentration of total volatile fatty acids (TVFA) (P = 0.082). In conclusion, steam explosion of OPF and EFB reduced NDF, ADF, and hemicellulose content and increased gas production and TVFA concentration.

Influence of hemicellulose content of Eucalyptus and Pinus fibers on the grinding process for obtaining cellulose micro/nanofibrils

The objective of this study was to verify the effect of the hemicellulose content of commercial bleached pulps on the ease of mechanical fibrillation and on its energy consumption (EC). NaOH in concentrations of 5% with 2 h of reaction, and 10% with 1 and 2 h of reaction, was evaluated for the partial removal of hemicelluloses. Pulp fibrillation was influenced by hemicellulose removal, being less fibrillated when excessive removal occurred (in the range of 4–8.5%). Hemicellulose content in the range of 9–13% increased the water retention value (WRV) and led to nanofibrils with smaller diameter, while a stronger alkali concentration reduced the WRV. X-ray diffraction (XRD) showed that reaction time was a determining factor for the crystallinity of the samples and partial conversion of cellulose I to cellulose II in pretreatments with NaOH 10% (1 and 2 h), and was a factor that may also damage the fibrillation process. Pre-treatment with NaOH 5% for 2 h promoted energy savings for both pulps. This work demonstrated that hemicellulose content has a considerable influence on the mechanical fibrillation and is a key aspect of the balance between efficient fibrillation and the energy required for that.