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Anerasari Meidinariasty
Chemical Engineering Department, State Polytechnic of Sriwijaya, Palembang 30139, Indonesia
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Journal : Kinetika

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Karakteristik Briket Biocoal dengan Penambahan Sekam Padi dan Wax Meidinariasty, Anerasari; ST.,M.T., Tahdid; Dewi, Retno Monnica
KINETIKA Vol. 1 No. 1 (2011): KINETIKA 01032011
Publisher : Politeknik Negeri Sriwijaya

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Biocoal made by mixing Sub-Bituminous Tanjung Enim coal with rice skin biomass to make biocoal briquette that will have calorific value suitable for domestic consumption and also have a quicker initial burning time that has been a problem in applying briquette.  The rice skin biomass was mixed in 10 gram – 50 gram compositions with 1 gram – 5 gram variations of wax to a fixed weight of 100 gram coal.  The size of coal was also studied, which was 50 mesh, 70 mesh, 140 mesh and 220 mesh.  The result shown that all briquettes had calorific values (5014 – 5891 cal/gram) that are in range of biocoal standard (5500 – 6000cal/gram)with a quicker initial burning time (2:35 – 16:58 minutes).  The sulphur content was reduced because of biomass added (0,21% – 0,31%; standard <0,5 %).  The tensile stress test result was 52 - 77 kgF/cm2 (standard >60 kgF/cm2).  The inherent moisture (%IM) was in range 3,69% – 7,46% (standard <5%);  %ash was 13,71% – 17,55% (standard 14 – 18 %); % volatile 13,17% – 23,76% (standard 20 -24%) and % fixed carbon was 57,16% – 61,82% (standard 54 – 60 %). Mixing coal with riceskin biomass and wax produce biocoal that  have a suitable calorific value and quicke initial burning time. The best composition was 100 gram coal : 30 gram biomass : 3 gram wax, the finer the particle size the quicker the initial burning time.
EFFECT OF CRYSTALIZATION TEMPERATURE AND COOLING TIME IN SEPARATION PROCESS OF STEARIN FROM CASTOR OIL USING DRY FRACTINATION METHODE Meidinariasty, Anerasari; Aswan, Arizal; Meilan, Tri Shella
KINETIKA Vol 3, No 3 (2012): KINETIKA 01112012
Publisher : Teknik Kimia Politeknik Negeri Sriwijaya

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Stearin is a fat which is solid in room temperature and commonly used  in making candles and soap.  Stearin is usually separated using one of these three methodes ; wet method (lipofractination), dry method and fractionating with solvent.  Among these methods, the dry method is commonly used to separate stearin from crude palm oil, because this process is simple and no chemical is used and produced.  The dry fractionation method was been applied to castor oil, to separate the stearin from its olein. First,  the oil was heated at 700C and then cooled down to 450C in stirring, the cooling process hence separated stearin from the oil.  After that, The crystallization was carried in temperature that was varied from 100C to 200C in range 50C. The processes were varied from 2 hours, 5 hours and 8 hours. The best result obtained at temperature 100C for 8 hours which yielded 34.8% rendemen with 0.255 % water content, having density of 0.8925g/ml and free fatty acid content of 11.177 %.  The Iodine value was 55.518.  These data were closed to the stearin data of stearin from crude palm oil.
PERANCANGAN ALAT PRESS UNTUK FIBERBOARD (DITINJAU DARI KERAPATAN DAN KADAR AIR) Meidinariasty, Anerasari
KINETIKA Vol. 9 No. 1 (2018): KINETIKA 01032018
Publisher : Politeknik Negeri Sriwijaya

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Fiberboard is a product made from wood or other lignocellulosic materials that is combined with synthetic adhesive and then processed by pressing. Corn cobs, coconut fiber, sawdust, and coffee bean pulp are lignocellulosic materials that can be used as raw materials for particle board. The manufacture of fiberboard is carried by variation of the raw material composition and variation of the additive which is used to know their effects on particle board quality based on SNI Standard 03-2105-2006. The manufacture of particle board was done with press machine. From the result of the analysis, it was found that variations of raw materials composition can affect the physical properties of the fiberboard. Physical properties parameters such as density and moisture content have fulfilled the standards of SNI 03-2105-2006. The best treatment in the manufacture of fiberboard is found on the composition of 70% corn cobs:30% coco fiber and 70% coffee bean pulp:30% sawdust seen from its high density and low moisture content value of the entire fiberboard produced
UJI KINERJA MEMBRAN MIKROFILTRASI DAN REVERSE OSMOSIS PADA PROSES PENGOLAHAN AIR RESERVOIR MENJADI AIR MINUM ISI ULANG Meidinariasty, Anerasari
KINETIKA Vol. 10 No. 3 (2019): KINETIKA 01112019
Publisher : Politeknik Negeri Sriwijaya

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Water in reservoir tank contains contaminant such as E.coli, Coliform and the highest TDS and Turbidity content. There many method that used to reduce contaminant in the water, such as by using microfiltration and reverse osmosis membrane. This research aimed to performace testing of microfiltration and reverse osmosis membrane in processing revervoir water become refilled drinking water by using flowrate as parameters to decrease contaminant in the reservoir water. Variations of flow rate (1.5; 2; 2.5; 3; 3.5 L/min) for microfiltration process and (2.2; 2.8; 3.4; 4.1; 5 L/min) for reverse osmosis process. The biggest flux at flow rate 1.5 L/min is 69,65 L/m2minute on microfiltration process and at 2.2 L/min is 16.6 L/m2minute on reverse osmosis process. The best rejection on microfiltration at flow rate 1.5 L/min, which is able to reduce the TDS parameters up to 77.31% on the 1 micron MF membrane and 66.68% on the 5 micron MF membrane. Turbidity rejection up to 70.62% on the MF 1 micron membrane and 64.97% on the 5 micron MF membrane. E.coli and Coliform rejection up to 63.57%.The effectiveness of RO membrane to reduce TDS is 97.18% and turbidity 85.71% at valve opening 20% with a pressure of 4 bar flow rate of 2.2 L/min where nothing E.coli and Coliform bacteria lef
PENGARUH VARIASI JENIS ABU BOILER DAN KOSENTRASI HCl TERHADAP SIFAT FISIS SILIKA GEL HASIL SINTESIS Meidinariasty, Anerasari; Purnamasari, Indah; Zamhari, Mustain; ., Fadarina; Permadi, Jekasyah; Fadillah, Nadia Zaky; Luthfiah, Sakinah
KINETIKA Vol. 11 No. 3 (2020): KINETIKA 01112020
Publisher : Politeknik Negeri Sriwijaya

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Efforts to minimize environmental pollution caused by solid waste in the form of boiler ash are managed and reused into new materials that have economic value. Boiler ash has a high enough silica content which can be used as an alternative raw material for making adsorbents in the form of silica gel. This study aims to synthesize silica gel from variations of boiler ash and determine the effect of HCl concentration on its physical properties. The boiler ash used comes from PT Tanjungenim Lestari Pulp and Paper, PT Pupuk Sriwidjaja and PT Sriwijaya Palm Oil Indonesia. Silica gel synthesis was carried out by extracting boiler ash with 3 M NaOH solution for 1 hour, then the extraction results in the form of Sodium Silicate were precipitated using HCl with various concentrations of 1, 3 and 5 M. The physical properties of the synthesized silica gel were analyzed by analyzing the SiO2 content, water content, and absorption capacity of water vapor. The effect of HCl concentration on the physical properties of the synthesized silica gel showed the highest yield value in SG PP, SG PS, and SG PO respectively amounted to 15.6176%, 21.6115% and 24.5215%.The highest SiO2 content value in a row in SG PP, PS SG and SG PO amounted to 39.48%, 52.73% and 50.74%.
PENGOLAHAN AIR PAYAU MENJADI AIR BERSIH MENGGUNAKAN METODE ELEKTROKOAGULASI Kaslum, Leila; ., Fadarina; Meidinariasty, Anerasari; Yuliati, Selastia; Syakdani, Adi; Pratama, M.Bagas; Alpitansyah, Rachmad Bayu; Alnafrah, Fenty; Ismareni, Pepi
KINETIKA Vol. 12 No. 1 (2021): KINETIKA 01032021
Publisher : Politeknik Negeri Sriwijaya

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The limitation of clean water resources in coastal areas is related to the scarcity of fresh water. Water that has too high a salinity can cause harm if it is used for certain activities, for example, it is dangerous for health when used as drinking water, causing crop failure for agriculture, corrosion for equipment and buildings made of metal elements. In order to be used as clean water and suitable for daily household use, brackish water needs special treatment with the aim of reducing the mineral content in it, especially in reducing salinity levels. For this purpose brackish water treatment has been made into clean water which works based on the electrocoagulation process. The performance test was carried out by filling 10 liters of brackish water into the electrocoagulation reactor and using an electric current of 10 volts, 12 volts and 14 volts for each test. The observation times for each test were 60, 120 and 180 minutes. Measurement of salinity, iron, sulfate and organic substances for each test was carried out using a potentiometer, atomic absorption spectrophotometer, turbidimeter, and titrimetry. The optimum results of the test show that the use of 14 volts of electricity and contact time for 120 minutes can reduce iron levels from 1.41 mg / l to 0.98 mg / l, and sulfate levels from 301.97 mg / l to 235.84 mg. / l, levels of organic substances from 3.05 mg / l to 2.25 mg / l and salinity levels from 16.25 ppt to 10.07 ppt.
Co-Authors ., Fadarina Alfajri, Ahmad Rizki Alnafrah, Fenty Alpitansyah, Rachmad Bayu Annisa Annisa Arif Rachman, Muhamad Arizal Aswan Fadillah, Nadia Zaky Gilbert, Amudi Jhon Indah Purnamasari Ismareni, Pepi Kaslum, Leila Luthfiah, Sakinah Miftahul Jannah MUHAMMAD TAUFIK Muhammad Yerizam Mulyadi , Mulyadi Mustain Zamhari Oktaviani, Erika Dwi Permadi, Jekasyah Pratama, M.Bagas Retno Monnica dewi Robert Junaidi Selastia Yuliati Syakdani, Adi Tahdid ST.,M.T. Tri Shella Meilan Wijaya, Fadjri Maulana Yuliani, Tasya Dwi Zikri, Ahmad