The main purpose of this work was the possibility to process the plastic waste into an alternative fuel oil through pyrolysis. This pyrolytic fuel can be utilized as an alternative fuel for cookstoves as a liquid petroleum gas (LPG)/kerosene substitute for the household. The pyrolysis was conducted in a design of a simple, inexpensive and easy to operate semi-batch reactors that be applied definitely in urban and rural communities. Two type of plastic wastes were pyrolyzed up to 480°C with and without natural zeolite as catalyst. The higher fuel yield (%) was obtained when using zeolite in the process. The amount of 1000 g of two plastics waste type with natural zeolite yielded 650 mL (65% vol/w) and 550 mL (55% vol/w), respectively. The density of fuel oil product from 0.700 kg/m 3 to 0.710 kg/m 3 , the fuel oil kinematic viscosity in the range of 1.07 cSt to 1.14 cSt, and the heating value of 38 MJ/kg were obtained. The physical properties and the results of Fourier-transform infrared spectroscopy (FT-IR functional groups of this fuel oil were relatively close to that of conventional kerosene fuels. The operational cost of pyrolysis is about IDR 12,300/liters of fuel oil.
Isolation of lignin from Jepara teak furniture waste is an effort to utilize this waste and to overcome environmental pollution. Lignin was isolated by extraction from the sawdust of furniture waste, hydrolyzed and identified by Fourier Transport Infra-Red (FTIR). Isolation was carried out with a sample weight of 10 grams, a time of 2 hours and a temperature of 110oC and variations in the concentration of NaOH. The lignin yield of 0,106% (1,06 g) was obtained at a concentration of 12%-w NaOH, time of 2 hours and a temperature of 110oC. The guacil functional group as the dominated element of the lignin compounds was identified by FTIR spectra results at the absorption wavelength of 1269,6 cm-1.
Hazardous materials that are produced from drilling operation is a sensitive case. It needs more efforts to manage waste material. Online Bioremediation technology is one technology to reduce potential hazardous materials. Bioremediation is eco-friendly technology to remediation hazardous material. It will reduce the hazardous value at waste drilling material through degradation process. Adding Online Bioremediation system will give more protection to environment from potential hazardous materials. Pollutants or contaminants on wastesolid and wastewater are main problems in petroleoum industry. Bioremediation will reduces waste generated during drilling activities to acceptable environmental levels. Usually, Bioremediation process will be treated on land treatment and land farming, and this process will take times and cost. Online Bioremediation technology is in situ bioremediation process. This technology will work in parallel with drilling waste management system. Online Bioremediation will process wastesolid and wastewater in site of drilling projects.
AbSTrAKTujuan studi ini adalah menentukan optimasi produksi gaultherin dari gandapura melalui teknik inaktivasi enzim gaultherase dengan teknologi mixed-drying extraction. Kegiatan
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