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Sri Rezeki Muria
Jurusan Teknik Kimia Fakultas Teknik, Universitas Riau
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Penggunaan Inhibitor Dari Ekstrak Daun Ketapang (Terminalia Catappa L) Dengan Metode Sokletasi Untuk Mengendalikan Laju Korosi Pada Baja Karbon ASTM A36 Mastiar Krisdayanti Sinaga; Komalasari Komalasari; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 2 Juli s/d Desember 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Corrosion has been identified as one of the major problems in the chemical industry, especially in the pipeline’s system. The inhibitor is the most effective way to protect the metal against corrosion. The natural corrosion inhibitor is chosen as an alternative because it’s safe, widely available, low cost, biodegradable and environmentally friendly. This study aims to know the corrosion rate and the inhibition efficiency of Terminalia Catappa L leaf extract for low carbon steel. Terminalia Catappa L leaf extract was obtained by soxhlet extraction using ethanol-water as the solvent. Corrosion rate were determined by using the weight loss method. Low carbon steel was immersed in HCl 0.1 0.5 m and 1 M with and without Terminalia Catappa L leaf extract 0 g/L and 1.5 g/L by immersion time 24, 48,72,96 h. The result showed that corrosion rate decreases on increasing of concentration of the extract and increases the inhibition efficiency. The maximum efficiency was obtaining at 1.5 g/L of corrosion inhibitor of 96 hours contact time in HCl 0.1 M with inhibition efficiency 89,77%. Keywords: corrosion, HCl, inhibitor, low carbon steel, Terminalia Catappa L leaf
Pengaruh Konsentrasi Palm Oil Mill Effluent (POME) Kinerja Konsorsium Mikroalga-Bakteri Dari Palm Oil Mill Effluent (POME) Untuk Produksi Lipid Menggunakan Multitubular Airliftbioreactor Andhika Chandra; Shinta Elystia; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Palm Oil Mill Effluent (POME) is wastewater that has high organic mattercontent. The treatment process of Palm Oil Mill Effluent (POME) generally with the open pond system can be one of the contributors of greenhouse gases in the form of CO2 and CH4 gases. To prevent the release of greenhouse gases, microalgae are used by using POME which contains organic ingredients as a nutrition source for microalgae cultivation media to produce raw materials for biofuel (in the form of lipids and carbohydrates) that can be used to overcome the energy crisis. In this study, a microalgae-bacteria consortium of POME wascultivated in POME medium with a variation of injection of CO2 gas flow with variations (0,3; 0,5; 0,7) l/minute. The cultivation process was carried out for 13 days with radiation using sunlight. The results showed that at a flow rate of 0.5 l /min the lipid content was 45.21% of dry weight with μ = 0.850 / day. Theefficiency of removal of organic matter in the form of COD and total nitrogen is 87,36% and 69.92%.Keywords: Consortium, Microalgae, Indigenous, CO2 , Flow rate, Injection , Lipid, COD, Nitrogen total, Palm Oil Mill Effluent (POME)
Inaktivasi Askospora Talaromyces Sp. Dalam Jus Nanas Menggunakan Proses Termal Doni Fozla; Evelyn Evelyn; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Talaromyces sp. is a heat resistance mold. Talaromyces sp. ascospore can survive after pasteurization and germinate in low pH fruit juices. Food preservation by thermal processing is a conventional treatment method and is still often applied today. The aim of this study was to investigate the effect of temperature (T: 85 °C, 88 °C, 91 °C) and soluble solid content (SS: 10 °Brix, 20 °Brix, 30 °Brix) on the thermal inactivation of Talaromyces sp. Ina-CC F155 ascospore. It was found that the ascospore log reduction increased with increasing temperature. For example, at SS; 10 °Brix there was a reduction of 2.5 log after 22.3 minutes for 85 °C, 14.3 minutes for 88 ° C and 9.3 minutes for 91 °C. in contrast, increasing soluble solid content resulted in the increases of Talaromyces sp. ascospore resistance in pineapple juice. The results of this study emphasize the importance of temperature and soluble solid content for heat resistance of Talaromyces sp. ascospore in juice.Keywords: ascospore, inactivation, pasteurization, thermal process, Talaromycessp.
Pengaruh Konsentrasi Saccharomyces Cerevisiae Terhadap Biokonversi Pelepah Sawit Menjadi Bioetanol Meliana Dewi; Adrianto Ahmad; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Oil palm is one of the plantation commodities that have important role in economic activity in Indonesia. With a total area of 11.30 million hectares and oil palm plantations produce more than 75 million tons of palm oil waste per year and palm oil has a calorific value of 3350 kcal/kg, oil palm has the potential to contribute alternative energy from the resulting biomass. In addition to being utilized as an environmentally friendly renewable energy source, conversion of palm oil to bioethanol also helps to reduce untapped waste. Producing bioethanol from oil palm frond can be done through fermentation process. Factors that affect the fermentation process one of them is the number of cells of microorganisms. The microorganism used in this study is Saccharomyces cerevisiae. The purpose of this study was to determine the effect of Saccharomyces cerevisiae concentration on fermentation process on bioethanol produced and determine the best time of fermentation to bioethanol conversion from oil palm frond. The conversion of oil palm frond into bioethanol includes of delignification of oil palm frond by using KOH solution obtained from empty fruit bunches ash extract, purification of oil palm frond using 3% H2O2 solution, hydrolysis of cellulose using 1% H2SO4 with 100ºC for 60 minutes, and fermentation using Saccharomyces cerevisiae with different concentration of Saccharomyces cerevisiae 4 g/L, 6 g/L, 8 g/L, and 10 g/L. The maximum sugar concentration produced by the hydrolysis process was 117.55 g/L. The best bioethanol content was obtained at 3.29% (v/v) or 25.97 g/L at Saccharomyces cerevisiae 8 g/L concentration and 96 hours fermentation time.Keywords: Bioethanol, Fermentation, Oil Palm Frond, Saccharomyces cerevisiae
Pembuatan Bioetanol Dari Limbah Tongkol Jagung Menggunakan Proses Simultaneous Sacharificatian and Fermentation (SSF) Dengan Variasi Konsentrasi Enzim Dan Waktu Fermentasi Elgina May Lestari; Elvi Yenie; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

One of energy source alternative that can be used as a substitute for fossil fuel-based energy, is bioethanol. Bioethanol is biochemistry fluid from fermentation process of sugars by using microorganism. The raw material of bioethanol production is very diverse, like corn cob. Corn cob can be used as raw material for bioethanol production because contain of cellulose. This study aims to make bioethanol from corn cob with Sacharificatian Simultaneous and Fermentation (SSF) process with cellulase enzyme variation are 3%, 5%, 7%, 9%, and 11% v/v substrate and fermentation time are 3, 4, and 5 days. From the research is obtained the highest bioethanol concentration is 5% on the addition of cellulase enzymes 11% v/v substrate with 3 days fermentation time.Keyword: Bioethanol, Corn cob, Cellulase, SSF
Inaktivasi Termal Spora Bacillus Subtilis Dalam Jus Nanas Sakinah Rhajani; Evelyn Evelyn; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Bacillus subtilis is a spore-forming bacterium and has been identified as spoilage in fruit-based medium such as pineapple and tomato. Spores of B. subtilis are heat resistant bacteria. Food preservation by thermal processing is a conventional method and is still used today. The purpose of this study was to determine the effect of temperature (T: 90 °C, 95 °C, 100 °C) and soluble solid 12 °Brix on the thermal inactivation of B. subtilis spores. Then, the kinetics of first order was also investigated in thermal process of B. subtilis in pineapple juice (D-value and the z- value). The D-values obtained at SS 12 ° Brix and temperatures of 90, 95, 100 °C were 13.38; 6.75, and 2.11 minutes. It was shown that higher temperature resulted in the decreasing of the time needed to inactivate the spores. Higher resistance of the spores were observed at higher SS. The results of this study indicate the importance of temperature and soluble solid for heat resistance of B. subtilis spores in pineapple juice. Keywords: Bacillus subtilis, Inactivation, Pineapple juice, Resistance, Spores
Menganalisis Hubungan Pakan Ikan Hasil Biodegradasi Styrofoam Oleh Ulat Hongkong Terhadap Nilai LD50 Dengan Variasi Komposisi Bahan Pakan Ikan Zahra Nadia Elysahaq; Elvi Yenie; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Styrofoam is the number 6 plastic in the plastic classification, namely polystyren and styrofoam is categorized as the 5th largest producer of hazardous waste in the world. One method of processing styrofoam waste is biodegradation using mealworm (Tenebrio molitor larvae) because it is able to degrade styrofoam and does not have a negative impact on survival. The research aims to analyze the relationship of pellet from the biodegradation of styrofoam by mealworm to LD50 values with variations in the composition of pellet making. This research was carried out by the experimental method. The results of the biodegradation of styrofoam produce waste are fecula (mealworm feces) and biomass (dead mealworms). Variations in the composition ratio of ingredients in the pellets of each basin are different. Treatment of A = pellets P1 (25% biomass and 75% fecula), B = P2 pellets (50% biomass and 50% fecula), C = P2 pellets (75% biomass and 25% fecula), and D = pellets commercial buoyancy as a control. The results of the LD50 toxicity test on parrot fish, pellet from the biodegradation of styrofoam by mealworm is not toxic.Keywords: styrofoam waste, biodegradation, mealworm, pellet, LD50 toxicity test.
Pengaruh Perbandingan Eceng Gondok Dan Air Terhadap Kestabilan Sistem Pada Produksi Biogas Secara Fermentasi Anaerob Tahap Metanogenesis Resti Ossi P; Adrianto Ahmad; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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Hyacinth (Eichhorhia crassipes) is a weed on waters which is a big problem for damage the environment but it contains materials that can be fermented and produce biogas, there are hemicellulose and cellulose. This research head for produce biogas from hyacinth by anaerob fermentation process with microorganizm on batch system and determine optimum ratio of hyacinth and water along with the effect to the stability of system. There were stages on this research, including seeding, acclimatization, and anaerob batch fermentation. Seeding was doing in ten days with ratio hyacinth and water was 75%:25%, then continued to acclimatization in 48 days. The anaerob batch fermentation was doing with variation of ratio hyacinth and water 1:2, 1:3, 1:4, and 1:5 in anaerob batch bioreactor during 32 days. Analysis of pH, biogas volume, volatile acid, and alkalinity was analized every two days during anaerob batch fermentation. The result of this research showed that in 48 days acclimatization process was produced biogas about 75.840 mL. In the fermentation process was resulted biogas about 23.300 mL with methane contents was 11.924,56 ppm or 1,19%; pH optimum 6,8-7,2; volatile acid concentration 145,8 mg/L; alkalinity concentration 1684,13 mg/L, and ratio of AV/alkalinity 0,087 on the rasio of hyacinth and water at 1:2. In conclusion, the stability of system will decrease along with increasing amount of water in the substrat of anaerob batch fermentation.Keywords: Anaerob Batch Fermentation, Biogas, Hyacinth, Methane
Hidrolisis Daun Sawit Menjadi Glukosa Dengan Variasi Konsentrasi Asam Fosfat (H3PO4) Dan Rasio Substrat-Pelarut Boy Jansen Roberto Manik; Sri Rezeki Muria; Komalasari Komalasari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
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Indonesia, especially Riau is a palm oil producing region. The increase of plantation and palm oil production is directly proportional to the amount of waste produced. Increasing waste is not offset by the treatment of such waste as oil palm leaves waste. Oil palm leaves is a lignocellulosic material which can be used to make products, one of them is glucose which can be used to make bioethanol and others. This research is aims to determine the best concentration of phosporic acid (H3PO4) and substrate-solvent ratio in the oil palm leaves hydrolysis to produce high glucose levels. The process of glucose production from oil palm leaves is carried out in various stages, namely preparation of raw materials, acid pretreatment process, analysis of raw materials and pretreatment, hydrolysis and results analysis. Acid pretreatmentwas carried out at temperature of 80ᴼC, within 60 minutes using sulfuric acid 0,5%. Hydrolysis is done by mixing sulfuric acid 60% and phosphoric acid in ratio 30:70, which is the concentration of phosphoric acid (60%,65% and 70%) and substrate ratio (product of pretreatment) with solvent (1:3 and 1:4) becomes the independent variable. Hydrolysis process is done by mixing solvent and substrate and left during 16 hours at room temperature, then added distilled water and cooked at 100 ᴼC during 2 hours. The result of this research obtained the best condition of oil palm leaves hydrolysis is the ratio of substrate-solvent 1:2 and phosporic acid 70% with a glucose level is 1977,8619 mg/L.Keywords : Glucose, hydrolysis, phosphoric acid, oil palm leaves, sulfuric acid
Kultivasi Mikroalga Menggunakan Media Af6 Berdasarkan Perbedaan Volume Solution A Media Af6 Febrina Adelina Sigalingging; Padil Padil; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Microalgae are microscopic plant organisms that live in waters. Nutrition is one of the important factors for the growth of microalgae. Optimization of nutrition is expected to increase the growth of microalgae. In cultivating laboratory scale microalgae, AF6 media is used as a source of nutrition. One stock of AF6 media material is solution A contains lots of nitrogen. This research purpose for determining the effect of the difference in volume of AF6 media solution A on growth rate and doubling time of various microalgae cultivated in AF6 media. In this research observations of cell density microalgae Chlorella sp. (6) and Chlamydomonas sp. (4, 5, 19, chl) on the volume of solution A media AF6 2, 3 and 4 ml were carried out by UV-VIS spectrophotometer with a wavelength of 680 nm. The results showed that specific growth rate highest and shortest doubling time occurs on the addition of a volume of 4 ml of solution A AF6 media. Microalgae that have a highest specific growth rate and shortest doubling time are Chlamydomonas sp. Microalgae. (19) 0.91/day and 0.75/day, respectively. Therefore, microalgae Chlamydomonas sp. (19) can be cultivated on a commercial scale to be processed into the products we want.Keywords: lipids, microalgae, AF6 media, optical density, solution A
Co-Authors Adella, Lufya Adli Satria Sandika Adrianto Ahmad Adrianto Ahmad Aisyah Sri Lestari Andhika Chandra Artha, Ulfa Dwi Aulia Masta Bahruddin Bahruddin Bahruddin Bonita Esther FS Boy Jansen Roberto Manik Chairul Chairul Chairul Chairul Darmayanti, Indah David Andrio Devita Ulfa Sari, Devita Ulfa Dewi Kusuma Nurmalasari Dian Larasati Dian Larasati Diana Aprila Dina Citra Naomi Dina Citra Naomi Harianja Doni Fozla Dwi Laura Pramita Elfina Noviarni Chandra Elgina May Lestari Elvi Yenie, Elvi Erlangga, Herta Furaida EVELYN EVELYN Evelyn Evelyn Fajril Akbar Fanani, Adita Suri Fauzani, Rhanti Fauzy Isnandar Febrina Adelina Sigalingging Fikri Miftahul Shiddiq Firmanto, Firmanto fitriyanti fitriyanti Gita Aziza Salis, Gita Aziza Hamzah, Nirwana Hasti, Fucy Adilla Hasti, Fucy Adilla Hengky Darma Satria, Hengky Darma Hilmiyati Hilmiyati Ida Zahrina Ikhsan ' Fajrin Indah Darmayanti Darmayanti Indah Kartika Zulfa Indah Kartika Zulfa Indra Purnama Insani, Suciati Dwi Irdoni HS Irma Damayanti Isabella Amalia Denisa Putri Jeckson, Edie Jelizanur Jelizanur Jessar Hendrianto Juarsa, Tri Khairat Komalasari Komalasari Larasati, Dian Lely Rahmawati Saragih Lidya Anggraini Lita Darmayanti M. Rafi Yunanda Masriza, Maya Masroah Tuljannah Mastiar Krisdayanti Sinaga Maya Ratna Sari Mayang Sari Meilano Ashari Akbar Meisy Dhyta Amelia Meisy Dhyta Amelia Meliana Dewi Mesy Susri Darsi Muhammad Rivai Mustika Chairani Mustika Chairani Mutia Nurrahmadhani Niken Triani Klaway Reza Nova Diyana Nurhanifah Nova Ramadhani Farnas Novebriantika Novebriantika Novira, Tria Bela Novriandi, Rizky Nur Irfana Mardiyah Nurul Annisa Nuryanti, Lidya Oding Sitorus Okky Rizky Sinaga Padil Padil Purwoko, Agus Putri, Aulia Dewi Putri, Bella Nadiah Rahani Rahani Rendy Hidayat Resna Rauda Pratiwi Resna Rauda Putri Resti Ossi P Riko Naldo Saputra Rizkya Ramadhani Rohaya, Rohaya Roin Nuretha Roy Ronald Siburian, Roy Ronald Rozanna Sri Irianty Sakinah Rhajani Sally Mandari Sandy Juliana Sari Santoso Nugroho Sari, Nurriya Mayang Sheilviana Angela Shindi Unada Shinta Elystia Silvia Reni Yenti Sitinjak, Jufri Suanto Sri Armita Sari Sri Helianty Sri Indira Puspa Pertiwi Sri Indira Puspa Pertiwi SUSANTO, RENO Syelvia Putri Utami Tantri Wilinda Julia Tasbieh, Hayatrie Tri Lusi Lisa Dila Vonny Meidina Rizani Vonny Meidina Rizani Wenny Andini Wulandari, Zarah Ayu Yelmida Azis Yolanda Amalia Yuliyana Rahmawati Zahra Nadia Elysahaq Zuchra Helwani Zul Fadly Khaira Zuqni Meldha