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All Journal Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Communications in Science and Technology Journal of Bioprocess Chemical and Environmental Engineering Science Journal of Community Engagement Research for Sustainability Jurnal Teknologi Kimia Unimal Jurnal Pengabdian Masyarakat Waradin J-ABDIPAMAS (Jurnal Pengabdian Kepada Masyarakat) Estungkara: Jurnal Pengabdian Pendidikan Sejarah
Syamsu Herman
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Humanities Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Nursing Public Health Social Sciences Other

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Pengaruh Variasi Kecepatan Pengadukan Terhadap Hasil Pada Pembuatan Asam Oksalat Dari Bahan Dasar Ampas Tebu Nababan, Febrina; Zultiniar, Zultiniar; Herman, Syamsu
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 2 (2014): Wisuda Oktober Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Bagasse is a waste from the processing of sugar cane into sugar. The growing number of bagasse quantitatively into environmental problems that require attention and special handling. Bagasse contains cellulose, hemicellulose and lignin. Cellulose which contained in bagasse can be processed into useful products as oxalic acid by smelting with sodium hydroxide. Oxalic acid manufacturing process started from bagasse smelting mesh size of 40 by 15 grams with NaOH 4N for 75 minutes with a melting temperature of 180 °C and a long time stirring 20 minutes with stirring speed variations were 300, 400, 500 and 600 rpm. This research showed that 4.333 % yield of oxalic acid was produced at 600 rpm. Also, it indicated the stirring speed did not influence the oxalic acid yield. Keywords: Bagasse, cellulose, oxalic acid, sulfate acid, sodium hydroxide
Pengaruh Waktu Tinggal Hidrolik Terhadap Penyisihan Padatan Pada Pengolahan Sludge Ipal Pulp And Paper Menggunakan Bioeraktor Hibrid Anaerobik Ardian, Siti; Ahmad, Adrianto; Herman, Syamsu
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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The increasing of pulp and paper industry in Indonesia had brought environmental problems which caused by Sludge waste pollution. The characteristic the wastewater treatment of pulp and paper sludge includes TS (Total Solid) 7.6 gr/L; TVS (Total Volatile Solid) 7,4 gr/L; TSS (Total Suspended Solid) 6,0 gr/L; and VSS (Volatile Suspended Solid) 5,9 gr/L. The impact will potential if the solid contents were threw away into the water because the materials of the solid containts can became pollute in environtment. This research with treat the wastewater treatment of pulp and paper’s sludge using a hybrid anaerobic bioreactor with stoned-media to see the effect of hydraulic retention time 5, 4, 3, 2, and 1 days. The results of this research showed that the longer of hydraulic retention time is given, then the greater of solid elimination efficiency. The highest solids elimination efficiency can be found on hydraulic retention time 5 days. The value of TS (44.03%), TVS (83.06%), TSS (68.85%), and VSS (95.25%). The performance by hybrid anaerobic in wastewater treatment sludge has been good, in lowering the solids content parameters.Keywords: anaerob; efficiency; hybrid bioreactor; hydraulic retention time
Penentuan Model Kesetimbangan Adsorpsi Ion Fosfat (PO4-3) Menggunakan Arang Aktif Tongkol Jagung Dengan Variasi Massa Arang Aktif Dan Kecepatan Pengadukan Nainggolan, Ira Tri Asi Br.; Herman, Syamsu; Yenti, Silvia Reni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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One of contamination of laundry liquid waste containing phosphate causes negative impact on society lives. One of efforts to reduce phosphate in laundry wast is adsorption process. The purpose of this study is to find out the effect of absorbent active charcoal mass from the corn cobs and stirring speed and to determine the equilibrium model for phosphate adsorption.First, to determine the equilibrium time with 2 grams of active charcoal in a beaker glass with Na3PO4 solution ( 100 mL ) with 200rpm stirring speed, equilibrium time has been obtained before other variables.The more active charcoal mass of corn cobs and stirring speed of adsorption, the less reaming of phosphate concentration.At 100 rpm speed, 1 gram mass, 2 grams and 3 grams of phosphate concentration after 7,105 ppm, 5,521 ppm, 5,015 ppm absorption.At 200 rpm stirring speed for 1 gram mass, 2 grams and 3 grams of phosphate concentration after 7,065 ppm, 4,474 ppm and 2,134 ppm. At 300 rpm stirring speed for 1 gram mass, 2 grams and 3 grams of phosphate concentration after 5,140 ppm, 3,121 ppm and 2,090 ppm absorption. The mechanism of phosphate adsorption of corn cobs active charcoal powder is compatible with Freundlich Isotherm model which represents the physical adsorption with (R2) 0,999 factor correlation value.Keywords : adsorption, active charcoal, laundry waste, phosphate, equilibrium model.
Pengaruh Siklus Pencelupan-Pengeringan Pada Pembuatan Film Tipis Tembaga Oksida Berbasis Nitrat Dengan Konsentrasi 0,4M Sebagai Solar Selektif Absorber Septian, Handika; Amri, Amun; Herman, Syamsu
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Solar Selective Absorber (SSA) is a thin film at the coating surface of the collector that absorbs solar radiation selectively and convert it into maximum heat energy. Solar selective absorber can be synthesized using sol-gel dip-coating method. The purpose of research is to synthesize the thin film of copper oxide solar selective absorber from copper nitrate precursor using sol-gel dip coating methode, to know the influence dipping-drying cycle variation to absorptance value. Pieces of aluminum with size 2x4x0.5cm were cleaned using a solution of phosphoric acid 10% at temperature 50oC for 10 minutes. Sol precursor was prepared by disolved copper nitrate trihidrate 0,4M and propio nic acid in ethanol. The sol prekursor was stirred for 2 hours at room temperature. The coating was synthesized by varying the number of dipping-drying cycles 1x, 2x, 3x, 4x, 6x, 8x and 10x, then annealed at temperature 550 ºC for 1 hour. Reflektance spectra in the area of UV-Vis-NIR show that increased cycles of dip-coating increase the value of absorptance (α). The results showed that the highest absorptance value found in coatings which was synthesized using copper oxyde 0.4M at 10x cycles with absorptance (α) = 74.32%.Keywords : dip-coating, energy, film, solar selective absorber, sol-gel
Sintesis Film Tipis Tembaga Oksida Dengan Metode Sol-gel Dip-Coating Sebagai Solar Selective Absorber Andrizal, Andrizal; Herman, Syamsu; Amri, Amun
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Abstract

Solar selective absorber (SSA) is a thin film at the surface of the collector that absorbs solar radiation selectively and convert it into maximum heat energy. Solar selective absorber can be synthesized using sol-gel dip-coating method. The purpose of this research is to know the effect variation number of dipping-drying cycles to absorptance copper oxyde coating. Piecesof aluminum with size 2cm x 4cm were cleaned using a solution of phosphoric acid 10% at temperature 50oC for 10 minutes. Sol precursor prepared by disolved copper nitrate trihidrate and propionic acid in ethanol. The sol prekursor was stirred for 2 hours at room temperature. The coating was synthesized with 0.3M and the number of dipping-drying cycles 4x, 6x and 8x, then annealed at temperature 550 oC for 1 hour. The results showed that thehighest absorptance value found in coatings which was synthesized using copper oxyde 0.3M at 8x cycles with absorptance (α) = 71.99%, emitance (ε) = 6.63%, XRD test showed of cupric oxide (CuO).Keywords : coating, solar selective absorber, sol-gel dip-coating.
Studi Isoterm, Termodinamik Dan Kinetika Adsorpsi Zat Warna Direct Brown Menggunakan Hidroksiapatit Defisien Kalsium Delita, Fuji; A, Yelmida; Herman, Syamsu
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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Dye waste produced by industries contains dangerous and poison materials that could pollute the environment. In this study, hydroxyapatite calcium deficient will be used as medium of adsorption. This process will determine the isotherm models, thermodynamic, and adsorption kinetics models. The dye adsorption process was carried out at various temperatures and initial concentration of dye at a rotating speed of 250 rpm. The maximum adsorption capacity raised at a concentration of 10 ppm and temperature of 30ᵒC with the adsorption capacity of 87.5%. The isotherm model of the direct brown dye adsorption process follows the Langmuir model, since the Langmuir model with R2 approaching to 1 at all variation of temperatures. The adsorption kinetic model of direct brown followed the pseudo second order with 0.9992 of R2 used 40ᵒC of temperature, the initial concentration of direct brown solution was 40 ppm with an adsorption rate constant of 0.052. This study applied physical adsorption which using heat capacity of adsorption (ΔH) of -40,94 kJ / mol which is an exothermic process. Key words : Adsorption, Hydroxyapatite, Konsentration, Dye.
Penyisihan, Warna, Zat Organik Dan Kekeruhan Pada Air Gambut Dengan Kombinasi Proses Koagulasi-Flokulasi Menggunakan Koagulan Aluminium Sulfat (Al2(So4)3) Dan Membran Ultrafiltrasi Nastiti, Yulia; Daud, Syarfi; Herman, Syamsu
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 2, No 2 (2015): Wisuda Oktober Tahun 2015
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The main challenge in peat water treatment is finding the treatment process that produces treated water quality which meets the quality standard of clean water. One of the peat water treatment is membrane ultrafiltration with combination coagulation-flocculation process. Combination treatment is done to improve the quality of processed water and reduce the workload of the membrane so membrane's performance increases. The purpose of this study was to determine the decrease of turbidity, organic matter and color on coagulation-flocculation process, determine the flux and rejection coefficient of turbidity, organic matter and color in processing using ultrafiltration membranes without and with combination coagulation-flocculation process and determine decrease of color, organic matter, and turbidity in water treatment using membrane ultrafiltration with combination of coagulation-flocculation process. The study was conducted by using 60 mg/L of coagulant aluminum sulfate (Al2(SO4)3) on coagulation-flocculation process and ultrafiltration membrane feed pressure 0.5; 1 and 1.5 bar. The results showed highest rejection coefficient values of turbidity, organic matter and color obtained on peat water treatment by combination coagulation-flocculation process and ultrafiltration membrane at pressure 0.5 bar, with rejection coefficient value for turbidity, organic matter and color respectively amounted to 100 %, 91.04% and 96.68%.Key Words: Aluminum Sulfate, Coagulation-Flocculation, Color, Organic Matter, Peat Water, Turbidity, Ultrafiltration Membrane
Pengaruh Laju Alir Dan Tegangan Pada Pengolahan Limbah Cair Pabrik Kelapa Sawit Dengan Metode Reaktor Elektrik Kontinu Handayani, Della; Amri, Idral; Herman, Syamsu
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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Palm oil mill effluent continues to grow along with palm oil production in Indonesia. Palm oil mill effluent treatment has been using anaerobic ponds which are not efficient due to the require large areas of land and due to greenhouse gases because they produce CO2. Electrocoagulation is an alternative technology and advanced technology in treating palm oil mill effluent. Electrocoagulation is a method of coagulation using direct current through the electrochemical process. This research discusses the variation of voltage and flow rate using reactor methods with pollutant parameters such as biological chemical demand, chemical oxygen demand, total suspended solids and acidity (pH). The type of electrodes used is aluminum with voltage variations of 5, 7 and 9 volts and flow rate variations of 3,36; 4,32; and 7,5 L/hour. The sample used came from PTPN V Sei Galuh in Riau. The results obtained by the highest percentage of reduction in BOD were 84.76%; COD of 83.38%; TSS of 88.73% at a voltage of 9 volts and a flow rate of 3,36 L/hour. The results of this research are in accordance with the standard quality standards for palm oil mill effluent in the Minister of Environment Regulation number 5 of 2014. Keywords: BOD, COD, electrocoagulation, TSS, pH.
Geopolimer Berbasis Abu Terbang (Fly Ash) Boiler Pabrik Pulp Dengan Penambahan Grafena Oksida Setiani Br Manurung; Amun Amri; Syamsu Herman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
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Geopolymer has been successfully synthesized from boiler fly ash with the addition of Graphene Oxide (GO). The addition of graphene oxide is to enhance the mechanical properties of organicfly ash based geopolymer. Graphene oxide was made by using graphite from used batteries via Hummer method. The resulting graphene oxide solution was mixed with an alkaline activatorsolution (NaOH and Na2Si2O3) and stirred with a mixture of fly ash and sand. Once homogeneous, it was then poured into the mold and heat treated at temperature 900C for 24hours. A compressive strength test was performed using material testing equipment. The experiment results showed that the compressive strength of geopolymer with addition of GO wasincrease 44,67% in comparison with the geopolymer without GO. This results is very exciting to upgrade the quality of organic fly ash based geopolymer to reduce the use of conventionalcement due to of high carbon emission/polutant of conventional cement. In addition, this research can also reduce the abundant fly ash waste and overcome the accumulation of used batteries.Keywords: compressive strength, geopolymer, graphene oxide, hammer, fly ash
Adsorpsi Pospat (PO4-3) Limbah Cair Laundry (Artificial) Menggunakan Arang Aktif Dari Tongkol Jagung Dengan Variasi Massa Arang Aktif Dan Temperatur Adsorpsi Arianty Septia Ningsih; Syamsu Herman; Silvia Reni Yenti
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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The development of laundry services has an impact on the volume of wastewater from laundry activities which has also increased. Disposal of laundry waste containing phosphate is 9.9 ppm while the limit on water emissions is 1 ppm so that the presence of excessive phosphate in the laundry liquid waste causes eutrophication. On the other hand, corn cobs waste is agricultural waste that can be processed into activated charcoal which is then applied as an adsorbent. Therefore, this study aims to find a solution to the two problems above by making the corncob as an adsorbent material for handling phosphate waste. This study shows the effect of activated charcoal mass from corn cobs waste on phosphate adsorption in laundry liquid waste and the effect of stirring temperature on the phosphate adsorption process of laundry liquid using activated charcoal from corn cobs waste as an adsorbent. The first determines the equilibrium time by means of 2 grams of activated charcoal put into a beaker glass with a Na3PO4 (500 ml) solution at a speed of 100 rpm. After the time is obtained, the equilibrium is only made for another variable. From this study, it was found that the active charcoal mass of corn cobs which best absorb Pospat solution was 3 grams and the best temperature at 50oC with adsorption efficiency of 63.30%.Keywords: activated charcoal, adsorbent, waste, phosphate, corn cobs
Co-Authors Adrianto Ahmad Afrilianti, Azyarah Agus Ika Putra Al'farisi, Cory Dian Alfajar, Fariz Amri, Idral Amun Amri Andrizal Andrizal Ardian, Siti Arianty Septia Ningsih Arisman Adnan Azridjal Aziz Bahruddin Bahruddin Chairul Damanik, Gery Andreas Delita, Fuji Desi Heltina Drastinawati Drastinawati, Drastinawati Edy Saputra Enno Yuniarto Evelyn Evi Nadhifah Habib, Alltop Amri Ya Hadi Ikrima Handayani, Della Haref, Yoneco Hari Rionaldo Hendri, Yola Bertilsya Hendro Ekwarso Ida Zahrina Idral Amri Jahrizal James Becker Jhon Armedi Pinem Khairat Khairat, K Khairat, Khairat Lisa Legawati Muhammad Aidil, Muhammad Muhammad Saeri, Muhammad Muhdarina Muhdarina Nababan, Febrina Nadimisia, Tiara Dwisca Nainggolan, Ira Tri Asi Br. Nandra Saputra Nastiti, Yulia Nirwana Nirwana Ohi, Hiroshi Rahmi, Sri Wahdini Reni Yenti, Silvia Rozanna Sri Irianty S. Siswanto Salma Liska Satibi, Syawal Semuel Pati Senda Septian, Handika Setiani Br Manurung Silvia Reni Yenti Soewignjo Agus Nugroho SYAIFUL BAHRI Syarfi Daud Utami, Anggia Afza Wiranata, Arya Yelmida Azis Yolanda, Yogi Yusnimar Sahan Zella Sri Rizka Zulfansyah Zulfansyah Zultiniar, Zultiniar Zuqni Meldha