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Journal : Prosiding SNAST

SELULOSA DARI IMBAH CANGKANG KEMIRI SEBAGAI BAHAN PENGENTAL ALAMI BAHAN BAKAR Rini Kartika Dewi; M. Istnaeny Hudha
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

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Abstract

The gelling agent is a polymer component which is a combination of molecules that will give the desired thick and gel properties. The form of gel fuel can provide benefits in maintenance, is not dangerous, does not impact pollution and is practically handling. The source of thickener raw material that can potentially be derived from biomass. Because Inonesia is a country that is very rich in natural resources. In this study we tried to provide one biomass material that can be used as a thickening agent, namely cellulose from candlenut shell waste. In this study carried out by varying the mass of cellulose powder 1 shell candlenut waste; 2; 3; and 4 grams and 10 trichloroacetate concentrations; 15; 20 and 25%. Judging from the results of pH analysis, degree of substitution, viscosity, flame test and gas emission, the best mass of powdered candlenut thickener powder is found in the powder composition of 3 grams powder and the best trichloroacetate content at 15% level where the values ​​are based on powder mass and the best trichloroacetate content is the pH produced 8.4, with a substitution degree value of 0.29, a viscosity value of 1.43 cP, a flame test time of 4.19 minutes for ethanol gel combustion, with a value of CO gas emission 0.49 % ppm, the value of NOx gas emission produced is 0,0002% ppm, the value of gas emission of SO2 and gas H2S is 0% ppm.
KULTIVASI MIKROALGA SPIRULINA PLATENSIS DENGAN VARIASI PENCAHAYAAN MENGGUNAKAN LAMPU TL DAN MATAHARI Muyassaroh _; Rini kartika dewi; Dwiana Anggorowati
PROSIDING SNAST Prosiding SNAST 2018
Publisher : IST AKPRIND Yogyakarta

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Abstract

Spirulina platensis is one kind of bluish green microalgae classified into cyanobacteria, single celled and spiral shaped. The small size of Spirulina is the opposite with to big benefit from spirulina. Spirulina contain components of proteins, carbohydrates, fats, vitamins and minerals. With high carbohydrate content, spirulina has the potential as an energy feedstock that can be converted into bioethanol. Besides that in spirulina contains polysaccharides which have antitumor and antiviral effects, α-linoleic acid (GLA) which functions in cholesterol lowering, prevention of hepatitis, ficocyanin which is useful as an prevent tumors. Considering the many benefits of spirulina, various food industry, feed, pharmaceutical and other industries, it is necessary to conduct research to develop of spirulina. The cultivation of spirulina platensis was carried out in a laboratory using Walne media, fresh water which was kept at 25 - 270C, pH 7-8 and salinity 16-21, the variable used was lighting with TL light intensity of 2730 lux with a period of lighting bright (T) and dark (G) is: 6T-18G; 12T-12G; 18T-6G; 24T-0G compared to lighting using sunlight. The purpose of this research is to determine the efficient harvest age with maximum cell density. The results showed that for the 6T-18G the highest cell density was obtained on the eighteen day, which was 100,849,2569, for 12T-12G, it was obtained on the twelve day which was 182,324.84, for 18T-6G it was produced on the twelve day which was 218,312, 1019, for 24T-0G, it was found on the seven day that is 190.127,388, whereas with sunlight on the seven day with cell density of 411,624,2038, it can be concluded that with the most efficient sunshine is seven days and the highest cell density is 411,624, 2038.