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Pengaruh Sudut Masuk Impeller Terhadap Pola Alir Dalam Reaktor Biogas dengan Side Entering Mixer Mochammad Murtadho; Yukh Ihsana; Ni’am Nisbatul Fathonah; Sugeng Winardi; Tantular Nurtono; Kusdianto .
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Side-entering impeller is widely used in the biogas plant. Liquid effluent is processed anaerobically in a hugetank with a relatively small impeller-to-tank diameter ratio.The purpose of this research is to study the sideeffects of entering angle against the flow characteristics in a stirred tank with side-entering mixers (SEM)using flow visualization techniques. This work was conducted on the tank cylinder with a diameter of 40 cmand 40 cm high liquid. Impeller 3-blade propeller which made from stainless steel with 3 and 4 cm indiameter. Variable speed rotary impeller used is 100 to 400 rpm. Side entry angle used are 5 °, 10 °, and 15 °right and left side.Visualization techniques used in this research, specifically focus on the light liquid layervertically and horizontally desired then photographed with a DSLR camera and observation in order tocharacterize the flow pattern. In the type of impeller propeller with an increase in rotational speed, thegeneral layout circulation flow getting to the top is almost half of the liquid level. The changes of side entryangle does not really give much influence over the location of the circulation flow that occurs in the tank.
Extraction of Phytochemical Compounds from Pressed-Palm Fiber Using Water and Pressurize Carbon Dioxide Putu Adhitya Dita Putra; Bella Putri Novitasari; Sugeng Winardi; Tantular Nurtono; Kusdianto Kusdianto; Siti Machmudah
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2017: PROSIDING SNTKK
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Abstract

Sub-critical extraction of palm oil from pressed palm fiber using water and preassured carbon dioxide solventwas conducted via the dynamic mode to investigate the ability of water and CO2 to extract α-tocopherol, β-carotene, and phenolic compounds. The yield of palm oil and the solubility of α-tocopherol, β-carotene, andphenolic compounds were investigated at 120; 140; 160; and 180oC and pressure range from 30–100 bar. Theextracted oil was analysed α-tocopherol, β-carotene, and phenolic compounds content using UV–Visspectrophotometry. The results The temperature increase on the process of extracting hydrothermal on thetemperature (120-180oC) increase yield α-tocopherol .The steady to extract α-tocopherol , an acid palmitateand β-carotene on the temperature 180oc with pressure 10 MPa .From the experiment done get the best resulton the temperature 180oC to pressure 10 MPa with yield α-tocopherol 271,28 mg/g sample (% recovery is73,06%), yield pamitate acid 2,066 mg/g sample (% recovery is 0,55% ), and yield β-carotene 0,008 mg/gsample (% recovery is 0,0021 %) as compared to that achieved through conventional palm oil processingindicates that extraction of α-tocopherol, β-carotene, and phenolic compounds using this methode is viable.