Browsing by Author "Utami, Syelvia Putri"

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    Evaluasi rasio nilai c/n dan lignin pada proses degradasi Tandan kosong kelapa sawit menggunakan jamur pelapuk Putih
    (2018-03-01) Yenie, Elvi; Utami, Syelvia Putri
    Uncontrolled disposal of empty fruit bunches (TKKS) on the land surrounding the palm oil mill leads to anaerobic decomposition or large-scale decomposition processes. Gases that pollute atmospheres such as CH4, H2S, NH3, and Nox gas can be produced from decomposition processes of TKKS and leachate production resulting in contamination of groundwater and surface water. Globally these gases cause greenhouse effect, whereas locally can cause odor and impact of health. Seeing the potential of the amount that every hour of production as solid waste and the impact of environmental pollution then waste TKKS must be managed wisely. In this study, the evaluation of C/N and lignin values as an indicator of degradation of TKKS waste by white fungus mushroom is mushroom (Volvariella volvacea). This study it can be concluded that there is a linear relationship in the degradation process by the fungus (Volvariella volvacea) in the empty fruit bunches between the percentage value of lignin degradation and the C / N ratio for 25 days of fungal growth. Mushroom (Volvariella volvacea) as a white root fungi mushroom can be used to speed up the process of degradation of empty fruit bunches
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    Hydrolysis Pretreatment of Tetraselmis chuii into Glucose by Using Diluted Sulfiric Acid
    (2016-02-25) Utami, Syelvia Putri; Padil; Syamsiah, Siti; Amri, Amun; Miranda, Gilda
    Microalga has emerged as third generation in fuel based biomass which converted into several products and its content can be also utilized as model compound. Microalga comprises cellulose, hemicellulose and lignin. These cellulose and hemicellulose can be converted into glucose, as model compound for fuel and chemical production. This study focused on Tetraselmis chuii as feedstock and the hydrolysis pretreatment into glucose conversion by employing diluted sulfuric solution in varied temperature and concentrations. Tetraselmis chuii was used as microalga feedstock since they are distributed in Indonesia’s ocean. In order to obtain fuel or chemical product, microalga need to be pretreated first. This process was conducted with focused on breakdown the linkage between cellulose, hemicellulose or lignin. Glucose was generated from this hydrolysis process. Thus, it would apply as feedstock for bioethanol or furan production which utilized as intermediate compound/building block compound. This study aimed into the significant parameters for Tetraselmiss chuii hydrolysis and their biochemical composition. Experimental result was assayed in quantitative method by using High Performance Liquid Chromatography (HPLC). It was found out that Tetraselmiss chuii contain alpha cellulose and hemicelluloses without lignin present. Moreover, temperature has significant influenced for hydrolysis process than sulfuric acid concentration. The highest glucose temperature was 61 g/L which obtained at 100oC by using 1.25%(v/v) diluted sulfuric acid concentration.
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    IDENTIFIKASI DAN KARAKTERISASI JAMUR TANDAN KOSONG SAWIT SEBAGAI BIOSORBEN TERAKTIVASI BASA UNTUK PENYERAPAN LOGAM Cr(VI)
    (2019-11) Yenie, Elvi; Utami, Syelvia Putri
    In the palm oil processing factory, many macro-mushrooms of various sizes, shapes and colors grow quickly in empty fruit bunches. The potential of fungal biomass as a biosorbent is known for its ability to adsorb heavy metals. Conditioning of biomass used as a medium for adsorbing heavy metals is carried out by activation using alkaline solution (NaOH). One alternative for the separation of heavy metals from industrial waste that is effective, inexpensive, and environmentally friendly with biosorption processes, where the process uses microorganisms as biosorbents of heavy metals such as algae, fungi, and bacteria. The research objectives are: 1) macroscopic and microscopic identifying fungi that grow in empty fruit bunches. 2) Characterization of fungi using FTIR analysis. 3) Calculate the efficiency and adsorption capacity by fungi under conditions of activation using NaOH with variations in concentration and not activated on Cr (VI) metals. The results of macroscopic and microscopic identification of fungi that grow on empty fruit bunches is the fungus Coprinus comatus. After analysis using the fungus Coprinus comatus contains functional groups such as hydroxyl, alkenes, carboxylates, esters, amines and alkaline which qualify as biosorbents. Furthermore, the biosorbent is activated using NaOH with a concentration variation of 0.3 N; 0.5 N and 0.7 N and without activation. The best adsorption of Cr (VI) metal in the condition without activation. The highest efficiency values are 48.36% and 11.42 mg / gr adsorption capacity by the Coprinus comatus fungus. Biological waste treatment that uses fungi as biosorbents to adsorb heavy metals has the potential to be developed.