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Sri Rezeki Muria
Jurusan Teknik Kimia Fakultas Teknik, Universitas Riau
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Pemanfaatan Ekstrak Daun Ketapang (Terminalia Catappa L) Sebagai Green Inhibitor Dengan Metode Maserasi Untuk Mengendalikan Laju Korosi Pada Aluminium Roin Nuretha; Komalasari Komalasari; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 8 (2021): Edisi 1 Januari s/d Juni 2021
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Terminalia catappa L leaf extract has a considerable influence in decreasing the corrosion rate of a metal, because it contains tannin compounds which can be used as corrosion inhibitors. The purpose of this study was to determine the effect of addition of Terminalia catappa L leaf extract inhibitors on the corrosion rate of aluminum with variations in immersion time and determine the inhibition efficiency of variations in the concentration of Terminalia catappa L leaf extract on aluminum in corrosive media. The parameters varied in this study were the immersion time of the maceration process, the inhibitor concentration added in the corrosive solution of sodium chloride, namely 0, 1,5 and 2 g/L as well as variations in the time of corrosion testing at 36, 48, 60 and 72 hours. The time of maceration process shows that the longer the contact time, the greater the concentration of crude tannin, while the time of immersion of aluminum shows the longer the immersion time, the corrosion rate tends to decrease with the addition of inhibitors and the higher the value of inhibitory efficiency. The best crude tannin concentration was obtained during the maceration process for 6 days with a crude tannin concentration of 84,90 mg / L. The lowest corrosion rate was obtained when the addition of 2 g / L inhibitor in the corrosive NaCl medium with immersion time of 72 hours was 0,347 mm / year. The results showed that the best inhibition efficiency value using ketapang leaf extract inhibitor was added to the inhibitor 2 gr / L in 0,5 M corrosive media soaked for 72 hours with an efficiency value of 90,00%. Keywords: aluminum, corrosion rate, inhibitors, maceration, Terminalia catappa L leaf
Penyisihan Kandungan Nitrogen Total Pada Pome Menggunakan Chlorella sp. Dalam Flat-Photobioreactor Dengan Penambahan Kombinasi Konsentrasi Tembaga (Cu) Dan Seng (Zn) Shindi Unada; Shinta Elystia; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Palm oil mill effluent containing pollutants and has high content of organic matter. Organic material contained in palm oil mill effluent can be used as nutrition by microalgae Chlorella sp. and can reduce Total Nitrogen content in palm oil mill effluent. The nitrogen total removal process was carried out in a flat-photobioreactor with various concentrations of combinade Cu and Zn in the amount Cu are 0,1; 0,5; and 1,0 mg/L and Zn are 0,5 and 1,0 mg/L with contact times of 7 days. The results showed that at a combination of 1,0 mg/L Cu + 1,0 mg/L Zn, the highest microalgae cell growth was 4,86 x 106 cell/ml and the highest removal efficiency of organic matter of total nitrogen is 89,5% on the seventh day. Keywords: Chlorella sp., Cu, Zn, Total Nitrogen, flat-photobioreactor.
Fermentasi Kulit Nanas Menjadi Bioetanol Menggunakan Zymomonas Mobilis Dengan Variasi Pemekatan Medium Dan Waktu Fermentasi Adli Satria Sandika; Sri Rezeki Muria; Silvia Reni Yenti
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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The high dependence of fuel resource such as oil, coal, and gas will influence the depletion of fossil resources (oil, natural gas, and coal). Therefore, it is important to study conversion of pineapple peel to bioethanol as renewable energy to overcome dependence on fossil fuels. This research was conducted the fermentation of pineapple peel with concentrated medium variation to obtain high concentration of bioethanol. This work is aimed to study of bioethanol production from pineapple peel with concentrated medium variation with Zymomonas mobilis to increasing the concentration of the sugar inside the medium to obtain maximum conditions on producing bioethanol. Fermentation was conducted in 2 Liter fermentor with variations of fermentation time from 12 ; 24 ; 36 ; 48 ; 60 ; 72 until 84 hours respectively and concentratedmedium variation from 15% ; 20% ; 25% until 30%. respectively. The concentration of bioethanol was increased by increasing of concentrated medium variation. Maximum conditions of bioethanol production from pineapple peel were shown having 30%concentrated medium variation, and fermentation hours 60th about 8,79 % v/v.Keywords: bioethanol, concentrated, pineapple peel, Zymomonas Mobilis
Hidrolisis Daun Sawit Menjadi Glukosa Dengan Menggunakan Katalis H3PO4-H2SO4 Fitriyanti Fitriyanti; Komalasari Komalasari; 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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Abstract

Glucose is a simple monosaccharide containing an aldehyde group and six carbon atoms. Glucose is an intermediate product in biological and chemical conversion. Glucose can made from hydrolysis of biomass such as oil palm leaves. Previously, oil palm leaves are only used as fertilizer and animal feed. Biomass with the main component cellulose is very resistant to hydrolysis by water, therefor a catalyst in the form of acidic or alcalyc is needed. The purpose of this study was intended to examine the use of oil palm leaves as a raw material in the manufacture of glucose. There are two stages in this research, pretreatment and hydrolysis. The pretreatment using acid solvents with low concentrations of 0,5% H2SO4 with the cooking process at 80°C for 1 hour reaction time. The results showed that the acid pretreatment process using 0,5% H2SO4 solvent was able to increase cellulose 2%, hemicellulose 1%, and lignin reduction by 1%. The hydrolysis process is carried out in two stages, first stage is immersion of oil palm leaves with an H3PO4-H2SO4 catalyst ratio of 70:30 for 16 hours at room temperature. Then the second step is adding distilled water and cooked at a temperature variation of 100°C, 120°C and takes 2 hours, 3 hours and 4 hours. The highest glucose yield obtained from the hydrolysis process at 100°C for 4 hours at 26,8376% and the lowest glucose yield obtained from the hydrolysis process at 120°C for 4 hours at 18,1812%Keywords : Glucose, hydrolysis, oil palm leaves
Kultivasi Mikroalga Menggunakan Media Af6 Pada Berbagai PH Jelizanur Jelizanur; Padil Padil; 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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Abstract

Microalgae cultivation is one technique to grow microalgae in a controlled environment. Cultivation aims to provide a single species in microalgae mass culture for harvesting. This research used AF6 media with a volume of 90 ml and 10 ml of microalgae. The purpose of this research was to cultivate microalgae using AF6 media with variations in pH 4, 6, 8 and types of microalgae namely Chlamydomonnas sp (chl), Chlamydomonnas sp (019), Chlamydomonnas sp (4), Chlamydomonnas sp (5), Chlorella sp (6 ). The results showed that pH had a significant effect on microalgae cultivation. Microalgae Chlorella sp (6) with a combination of treatment pH 8 and observation time of the 10th day was the best treatment of all types of microalgae cultivated that is equal to 0.1255.Keywords: microalgae, AF6 media, pH
Pembuatan Bioetanol Dari Mikroalga Limbah Cair Kelapa Sawit Dengan Variasi Konsentrasi Ragi Menggunakan Saccharomyces Cerevisiae Sandy Juliana Sari; Shinta Elystia; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Energy consumption is increasing steadily with the population growth and industrial development. Therefore, a substitute should be found. Bioethanol has been pointed out as a solution for variety complex problems related to energy and environmental issues. One of material that has potential to be used as raw material for bioethanol is microalgae. Microalgae Chlorella pyrenoidosa can be lived in wastewater, such as in palm oil mill effluent. Chlorella pyrenoidosa has been considered to be aviable and renewable feedstock for bioethanol production because it high carbohydrates contain. Chlorella pyrenoidosa is hydrolyzed into glucose for further fermented into bioethanol. This research aimed to observe the best condition on fermentation process by concentration of yeast are 10%, 15%, 20% and 25%. Measurement of bioethanol concentration using refractometer. The analysis show the highest concentration of bioethanol was 0,28% using yeast 25%.Keywords : Chlorella pyrenoidosa, hydrolysis, fermentation, bioethanol
Sistem High Rate Algae Reactor (HRAR) Untuk Menyisihkan BOD Pada Palm Oil Mill Effluent (POME) Vonny Meidina Rizani; 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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Abstract

In Indonesia, Palm Oil Mill Effluent (POME) treatment generally used open pond system, but this system cannot utilize nutrients properly. High Rate Algae Reactor (HRAR) system can be the solution of this problem. HRAR can increase the growth of microalgae and bacterial, while eliminating pollutants in wastewater. This research aim to investigate the effect of microalgae suspension concentration towards the removal efficiency of Biochemical Oxygen Demand (BOD). Based on the research results, 25% of microalgae suspension concentration showed the best removal efficiency of BOD, was 86,07%.Keywords: High Rate Algae Reactor (HRAR), Microalgae-Bacterial Consortium, Palm Oil Mill Effluent (POME), Biochemical Oxygen Demand (BOD),
Pengaruh Variasi Debit Udara Terhadap Efisiensi Penyisihan Cod Dalam Limbah Cair Hotel Pada Sistem Moving Bed Biofilm Reactor (MBBR) Menggunakan Chorella Sp. Aulia Masta; Shinta Elystia; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Hotel wastewater contains pollutants such as COD if discharged directly the environment has a harmful effect on the environment. If not processed it will cause excessive growth of algae or aquatic plants (eutrophication). The study was conducted to determine the efficiency of waste treatment hotel in reducing the parameter of COD using the method Moving Bed Biofilm Reactor (MBBR) by utilizing Chorella sp. This research was carried out by growing biofilms on kaldness (K1) media and air injection by aerators with variations of air injection 3 L/minute ; 6 L/minute ;9 L/minute ; and control (without air injection) with processing time of 5 days. Based on the results of wastewater treatment research hotel with the MBBR method with air injection 6 L/minute, it was able to reduce the parameters of COD to below the quality standard. The highest cell density of Chorella sp. suspended and attached in a row that is 1,595 dan 1,587 (x107 cell/ml) with the density of the cell is able to reduce the COD parameter from concentration of 485,6 mg/L to 80 mg/L and efficiency of 83,53 %, so that hotel wastewater doesnot pollute the environment if it is discharged into water bodies.Keywords : COD, Kaldness (K1), Hotel Wastewater, MBBR, Chorella sp. Microalgae.
Inaktivasi Termal Spora Eupenicillium javanicum Dalam Jus Nanas Rizkya Ramadhani; Evelyn Evelyn; 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

These days, people's interest in consuming fruit juice such as pineapple in containers is very high because it is easier to consume and has a longer shelf life. Pineapple juice that is not processed properly can be contaminated with various decomposing microorganisms, one of which is the fungus Eupenicillium javanicum. E. javanicum can form spores and cause decay in pineapple which if consumed will cause mycotoxins. Therefore, processing by thermal pasteurization is needed to reduce certain undesirable microorganisms in the fruit juice products. The purpose of this study was to determine the effect of temperatures (80, 85, and 90 ℃ ) and spore age (30 and 60 days) on the thermal inactivation of E. javanicum spores. For 30day-old spores, to reduce 1 log of spores in pineapple juice at 13 ° Brix, it takes 27.62 minutes at 80 ° C, 12.8 minutes at 85 ° C and 3.19 minutes at 90 ° C. Also for the spores with 60 days there was a decrease in logarithms, namely at 43.67 minutes at 80 ° C, 29.07 minutes at 85 ° C and 6.5 minutes at 90 ° C. It was found that the temperature and age of the spores greatly influenced the level of resistance of E. javanicum spores in pineapple juice. Keywords: inactivation, pineapple, resistance, spores, E. javanicum
Pemanfaatan Chlorella Sp. Dengan Penambahan Kombinasi Fe Dan Co Untuk Menyisihkan Nitrogen Total Pada Limbah Cair Sawit Menggunakan Flat-Photobioreactor Indah Kartika Zulfa; Shinta Elystia; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Palm oil mill effluent containing pollutants and has high content of organic matter. Organic material contained in palm oil mill effluent can be used as nutrition by microalgae Chlorella sp. and can reduce Total Nitrogen content in palm oil mill effluent. The nitrogen total removal process was carried out in a flat-photobioreactor with various concentrations of combinade Fe dan Co in the amount Fe is 0,3; 0,5; and 0,7 mg/L and Co is 1 and 2 mg/L with contact times of 0, 1, 3, 5, and 7 days. The results showed that at a combination of 0,5 mg/L Fe + 0,2 mg/L Co, the highest microalgae cell growth was 6,00 x 106 cell/ml and the highest removal efficiency of organic matter of total nitrogen is 85,3%. Keywords: Chlorella sp., Fe (Iron), Co (Cobalt), Total Nitrogen, flat-photobioreactor
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