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All Journal Jurnal Teknik Kimia USU KOVALEN: Jurnal Riset Kimia E-Dimas: Jurnal Pengabdian kepada Masyarakat CHEESA: Chemical Engineering Research Articles Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia FLUIDA Fullerene Journal of Chemistry Borneo Engineering: Jurnal Teknik Sipil International Journal of Applied Technology Research Equilibrium Journal of Chemical Engineering REACTOR : Journal of Research On Chemistry And Engineering Jurnal Teknik Kimia USU Industrial Research Workshop and National Seminar Jurnal Teknik Kimia dan Lingkungan Journal of Innovative and Creativity Journal Serambi Engineering (JSE)
Keryanti, Keryanti
Jurusan Teknik Kimia, Politeknik Negeri Bandung
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Studi Literatur Pengaruh Pirolisis, Jenis Adsorban serta Aktivator dalam Karakterisasi Asap Cair Rony Pasonang Sihombing; Keryanti Keryanti; Fitria Yulistiani; Ayu Ratna Permanasari
Jurnal Kimia Fullerene Vol 6 No 1 (2021): Fullerene Journal of Chemistry
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37033/fjc.v6i2.234

Abstract

Liquid smoke is a preservative solution that can be used safely. This grade 1 product can be also used as food preservative. The aim of this article is to discuss and examine the previous experiment’s results by literature review. The outcome of this article is expected to be regenerated by other research using the existing variable which is discussed on this article or using new variable. Based on the result. There are some variables that effect the final quality of liquid smoke. Some of them are pyrolisys temperature, pyrolisys time, adsorbant type and activator type. Pyrolisys temperature used was arround 250 °C – 300 °C with resulted pH 1.41 to 2.25. While for pyrolisys temperature was arround 4 – 5 hours with phenol content arround 3.04% to 4.08%. The type of adsorbant used was zeoilte and quartz sand, which the acid total having both increment and decrement phenomenon. Activator type used were salt activator such as NaCl , NaHCO, CaCl2, Na2SO4 and base activator (NaOH) which producing the most percent acid total.
Pengaruh Variasi pH Medium terhadap Perolehan Biomassa Sel dan Laju Konsumsi Substrat Amonium pada Kultur Suspensi Sel Wortel (Daucus carota L.) Keryanti Keryanti; Ahmad Faizal; Sri Harjati Suhardi
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 5, No 2 (2020): EDISI SEPTEMBER 2020
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v5i2.1764

Abstract

ABSTRAKPada penelitian ini, sistem kultur suspensi sel wortel (Daucus carota L.) digunakan sebagai model untuk mengetahui pengaruh variasi pH terhadap pertumbuhan biomassa sel serta laju konsumsi substrat amonium dalam medium. Kalus ditumbuhkan selama 24 hari dalam sistem batch pada medium cair MS (Murashige dan Skoog) dengan penambahan 4,5 x 10-6 M kinetin dan 4,5 x 10-6 M 2,4-D serta kondisi pH awal medium berbeda yaitu pH 4,5; 5,8 dan 7,5. Perubahan pH medium diamati setiap 3 hari sekali disertai dengan pengukuran berat biomassa sel dan kandungan amonium dalam medium. Hasil pengamatan menunjukkan bahwa laju pertumbuhan spesifik biomassa sel paling tinggi terjadi pada kultur dengan kondisi pH awal medium 4,5 yaitu 0,08 hari-1 sedangkan paling rendah pada kondisi pH awal medium 5,8 (kontrol) yaitu 0,02 hari-1. Variasi pH awal medium menyebabkan perubahan dan fluktuasi nilai pH dalam medium sehingga mempengaruhi tingkat penyerapan substrat amonium dalam medium. Laju konsumsi amonium tertinggi terjadi pada kultur perlakuan pH awal medium 4,5 yaitu sebesar 0,088 mM/hari. Penggunaan amonium untuk pertumbuhan biomassa juga paling efektif pada kultur dengan kondisi pH awal medium 4,5 dengan nilai perolehan biomassa per substrat amonium mencapai 0,875 g sel/mM amonium. Penelitian ini dapat memberikan gambaran mekanisme dan efisiensi penyerapan media pada medium pertumbuhan sehingga dapat diterapkan untuk pengendalian sistem produksi terutama sistem bioreaktor. Kata kunci : amonium; batch; Daucus carota L.; pH; pertumbuhan sel ABSTRACT In this experiment, a carrot (Daucus carota L.) cell suspension system was used as a model to determine the effect of pH variations on cell biomass growth and the rate of consumption of ammonium substrates in the medium. Callus was grown for 24 days in a batch system on MS liquid medium (Murashige and Skoog) with the addition of 4.5 x 10-6 M kinetin and 4.5 x 10-6 M 2,4-D and the initial pH of the medium was different, namely pH 4,5; 5.8; and 7.5. Changes in the medium's pH were observed every three days, accompanied by cell biomass weight measurements and ammonium content in the medium. The observations showed that the highest specific cell growth rate occurred in cultures with medium pH initial conditions of 4.5, 0.08 days-1, while the lowest at medium pH conditions of 5.8 (control), 0.02 days-1. Variations in the initial pH of the medium cause changes and fluctuations in the medium's pH value so that it affects the rate of absorption of ammonium substrates in the medium. The highest ammonium consumption rate occurred in the culture medium initial pH treatment equal to 0.088 mM/day. The use of ammonium for biomass growth is most effective in cultures with an initial pH medium condition of 4.5 with the acquisition value of biomass per ammonium substrate, reaching 0.875 g cells/mM ammonium. This research can provide an overview of the mechanism and efficiency of media absorption in the growth medium to be applied to control production systems, especially in bioreactor systems. 
Distilasi Azeotrop Campuran Etanol-Air untuk Meningkatkan Kadar Etanol menggunakan Entrainer Etil Asetat Retno Indarti; Rintis Manfaati; Ari Marlina; Keryanti
Fluida Vol 14 No 1 (2021): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v14i1.3426

Abstract

Bioetanol yang dapat digunakan sebagai campuran bahan bakar alternatif harus memiliki kadar 99%, sehingga perlu dilakukan proses pemurnian terhadap campuran etanol yang masih mengandung air. Distilasi sederhana campuran etanol-air menggunakan bahan tambahan (entrainer) etil asetat dapat dilakukan untuk meningkatkan kadar etanol. Pada penelitian ini, pemurnian etanol dilakukan dengan proses distilasi azeotrop pada tekanan atmosfer dan suhu penangas air sebesar 70-75oC. Komposisi umpan yang terdiri dari campuran etanol yang mengandung air dan etil asetat sebagai entrainer. Penelitian dilakukan sebanyak 5 run dengan variasi penambahan etil asetat ke dalam umpan sebanyak 10% v/v, 20% v/v, 30% v/v, 40% v/v dan 50% v/v. Hasil penelitian yang diperoleh yaitu penambahan etil asetat ke dalam umpan yang menunjukkan kadar etanol tertinggi dengan waktu yang paling singkat ialah pada penambahan etil asetat sebagai entrainer yaitu sebesar 30% v/v, yang terdiri dari campuran 15 ml etil asetat dan 35 ml etanol 80%. Hasil analisis yang dilakukan dengan kromatografi gas diperoleh konsentrasi etanol sebesar 99.80% dan waktu distilasi selama 90 menit
Produksi Asam Poliglutamat Melalui Fermentasi Menggunakan Bacillus substilis Dengan Variasi Konsentrasi Asam Sitrat Citra Noer Aqsha; Deni Ramdhani; Dini Nurcahya; Ratna Yulistya Ningrum; Riski Harliyansyah; Keryanti
Fluida Vol 15 No 1 (2022): FLUIDA
Publisher : Jurusan Teknik Kimia, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v15i1.3520

Abstract

ABSTRAK Pada penelitian ini dilakukan produksi asam poliglutamat dari asam L-glutamat dengan fermentasi menggunakan mikroorganisme Bacillus subtilis. Tujuan dari penelitian ini yaitu untuk menentukan variasi konsentrasi asam sitrat optimum dalam media fermentasi yang dapat menghasilkan asam poliglutamat dengan jumlah paling banyak. Konsentrasi asam sitrat dalam media fermentasi divariasikan pada rentang 20–50 g/L. Analisis hasil fermentasi meliputi perhitungan berat kering sel, berat asam poliglutamat, dan nilai yield. Isolasi asam poliglutamat dilakukan melalui tahapan sentrifugasi, pengendapan dengan metanol, dialisis dan liofilisasi. Hasil penelitian menunjukkan bahwa variasi terbaik dalam memproduksi asam poliglutamat dari asam L-glutamat yaitu pada konsentrasi asam sitrat 20 g/L dengan hasil asam poliglutamat sebesar 12 mg dan yield 0,6%. ABSTRACT In this study, the production of polyglutamic acid from L-glutamic acid was carried out by fermentation using the microorganism Bacillus subtilis. The purpose of this study was to find variations in the concentration of citric acid in the fermentation media that can produce high amount of polyglutamic acid. The concentration of citric acid in the fermentation medium was varied in the range of 20–50 g/L. The fermentation broth was analyzed for the calculation of cell dry weight, polyglutamic acid weight, and yield. Isolation of polyglutamic acid was carried out through centrifugation, precipitation with methanol, dialysis and lyophilization. The results showed that the best variation of citric acid in producing polyglutamic acid was 20 g/L citric acid by producing polyglutamic acid from L-glutamic acid of 0.012 g and yield of 0.6%.
Sintesis Zn-BDC dengan Metode Sonokimia dan Aplikasinya Pada Proses Adsorpsi Ion Logam Pb2+ Fauzi Abdilah; Mentik Hulupi; Keryanti Keryanti; Nida Nabilah; Tiana Hasna Nabilah
REACTOR: Journal of Research on Chemistry and Engineering Vol 3, No 1 (2022): Published in June 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v3i1.48

Abstract

The heavy metal ion pollution such as lead (Pb2+) in wastewater is an environmental problem that needs to be solved. The adsorption method has been reported to have good potential as an alternative method for reducing heavy metal contents in aquatic environment. The most widely used adsorbent media are porous materials with a large surface area and low density. Metal Organic Frameworks (MOFs) are a type of porous material that is widely applied in various fields, such as fuel purification, solvent recovery, gas storage, and adsorbents. Lead(II) is a heavy metal ion that can pollute the environment and endanger humans. This study aims to synthesize MOFs and apply it to the Pb2+ adsorption process. In this research, MOFs type Zn-BDC or MOF-5 were synthesized by sonochemistry method at 60 ℃ as adsorbent for Pb2+ ion. Characterization of the adsorbent by FTIR showed the presence of functional groups C=O, C-H, and Zn-O which indicated the formation of the MOF-5 compound. The concentrations of Pb2+ ions were analyzed using Atomic Absorption Spectrophotometer (AAS). The experimental results show the optimum conditions for the adsorption process at pH 5 for 60 minutes with adsorption efficiency reaching 93.41%. Testing the adsorption isotherm model showed that the Pb2+ ion adsorption process using Zn-BDC as an adsorbent followed the Langmuir isotherm model with the R2 value of 0.9986.
Fermentasi Kopi Arabika Menggunakan Fermentor Skala UMKM Tri Hariyadi; Zahra Nur Salsabila; Gianistri Maulani; Keryanti Keryanti
Fluida Vol 15 No 2 (2022): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v15i2.4391

Abstract

Coffee farmer in Babakan Kertasari Village requires a fermenter that can ferment 100 kg of coffee cherries per day to fulfill the market demand. Therefore, the object of this study is to make a coffee fermenter with SMEs scale and to evaluate the performance of the fermenter with the addition of 130 ml/L of Local Microorganism (MOL) made from fermented cassava (cassava tape). Fermentation was carried out for 72 hours in room temperature and in semi-aerobic condition with 14 kg of coffee cherries in SMEs scale fermenter. Evaluation of the fermenter performance was done by analysing pH and ethanol content and organoleptic test of taste and aroma of fermented coffee. The result of analysis shows that fermented Arabica coffee which called cultured coffee fulfilled the National Indonesian Standard (SNI) with pH greater than 4 and caffeine content of 1.97%. Organoleptic test showed that 56% of panellists really like the aroma and 24% of panellists really like the taste of cultured coffee.
Produksi Asam Poliglutamat Melalui Fermentasi Menggunakan Bacillus substilis Dengan Variasi Konsentrasi Asam Sitrat Citra Noer Aqsha; Deni Ramdhani; Dini Nurcahya; Ratna Yulistya Ningrum; Riski Harliyansyah; Keryanti Keryanti; Ade Safaat
Fluida Vol 15 No 1 (2022): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v15i1.3520

Abstract

ABSTRAK Pada penelitian ini dilakukan produksi asam poliglutamat dari asam L-glutamat dengan fermentasi menggunakan mikroorganisme Bacillus subtilis. Tujuan dari penelitian ini yaitu untuk menentukan variasi konsentrasi asam sitrat optimum dalam media fermentasi yang dapat menghasilkan asam poliglutamat dengan jumlah paling banyak. Konsentrasi asam sitrat dalam media fermentasi divariasikan pada rentang 20–50 g/L. Analisis hasil fermentasi meliputi perhitungan berat kering sel, berat asam poliglutamat, dan nilai yield. Isolasi asam poliglutamat dilakukan melalui tahapan sentrifugasi, pengendapan dengan metanol, dialisis dan liofilisasi. Hasil penelitian menunjukkan bahwa variasi terbaik dalam memproduksi asam poliglutamat dari asam L-glutamat yaitu pada konsentrasi asam sitrat 20 g/L dengan hasil asam poliglutamat sebesar 12 mg dan yield 0,6%. ABSTRACT In this study, the production of polyglutamic acid from L-glutamic acid was carried out by fermentation using the microorganism Bacillus subtilis. The purpose of this study was to find variations in the concentration of citric acid in the fermentation media that can produce high amount of polyglutamic acid. The concentration of citric acid in the fermentation medium was varied in the range of 20–50 g/L. The fermentation broth was analyzed for the calculation of cell dry weight, polyglutamic acid weight, and yield. Isolation of polyglutamic acid was carried out through centrifugation, precipitation with methanol, dialysis and lyophilization. The results showed that the best variation of citric acid in producing polyglutamic acid was 20 g/L citric acid by producing polyglutamic acid from L-glutamic acid of 0.012 g and yield of 0.6%.
Pengaruh Penggunaan Bioreaktor Dua Tahap terhadap Pengolahan Anaerobik Lindi Sampah Kota Laily Isna Ramadhani; Alifa Dewi Kirana; Ghinaa Annisa Khairani; Herawati Budastuti; Dhyna Analyes Trirahayu; Keryanti
Jurnal Serambi Engineering Vol. 9 No. 4 (2024): Oktober 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The generation of waste in landfills can result in the production of wastewater, commonly referred to as leachate. This leachate has the potential to pollute the surrounding environment, as it can enter the groundwater or be transported by surface flows. Consequently, leachate treatment is conducted through a two-stage anaerobic process. The method was selected due to its capacity to decompose waste with high organic content and to produce optimal biogas. The objective of this study is to ascertain the impact of employing a two-stage anaerobic bioreactor on the proliferation of anaerobic microorganisms in the context of leachate treatment. The application of an acidic pH in the acidogenic bioreactor influences the growth of acidogenic bacteria, resulting in a shorter lag phase in comparison to the single bioreactor. This also impacted the reactor's performance in reducing the concentration of chemical oxygen demand (COD). The two-stage bioreactor demonstrated a superior COD reduction efficiency of 78%, in comparison to the single-stage bioreactor, which exhibited an efficiency of 69%.
Pengaruh Konsentrasi Tepung Kulit Nanas Pada Fermentasi Dengan Metode SHF dan SSF Untuk Menghasilkan Etanol Keryanti, Keryanti; Herliana, Hanafiah; Anggraeni, Nani; Manfaati, Rintis
Prosiding Industrial Research Workshop and National Seminar Vol. 14 No. 1 (2023): Vol 14 (2023): Prosiding 14th Industrial Research Workshop and National Semina
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v14i1.5443

Abstract

Limbah kulit nanas masih memiliki kandungan pati 17.53% (b/b), protein kasar 8.78% (b/b), lemak kasar 1.15% (b/b) dan gula reduksi 13.65% (b/b) sehingga dapat menjadi alternatif bahan baku fermentasi untuk menghasilkan etanol. Produksi etanol dari bahan pati dan selulosa seperti tepung kulit nanas beberapa kali telah dilakukan, namun etanol yang dihasilkan kurang optimal sehingga membutuhkan alternatif proses yang dapat meningkatkan kualitas etanol. Upaya peningkatan produksi etanol dari tepung kulit nanas dapat dilakukan dengan menggunakan dua metode yaitu Separated Hydrolysis and Fermentation (SHF) dan Simultaneous Saccharification and Fermentation (SSF). Tujuan penelitian ini untuk mengetahui pengaruh variasi konsentrasi tepung kulit nanas terhadap kadar etanol hasil fermentasi dengan metode SHF dan SSF. Variasi konsentrasi tepung kulit nanas yang digunakan (g/L) yaitu 20, 40, 60 dan 80. Proses fermentasi dilakukan pada reaktor 250 mL selama 96 jam dengan penambahan inokulum Saccharomyces cerevisiae sebanyak 20% (v/v). Pada penelitian ini digunakan enzim selulase sebesar 5% (v/v) dari bahan baku yang telah dilarutkan untuk proses hidrolisis pada metode SSF serta katalis HCl 0.1 N (b/v) pada metode SHF. Pengujian dari hasil penelitian ini analisis kadar glukosa dengan metode DNS dan analisis kadar etanol menggunakan refraktometer serta HPLC. Dari hasil penelitian ini diperoleh kadar etanol tertinggi pada konsentrasi tepung kulit nanas 80 g/L sebesar 7.99% untuk metode SHF dan 13.01% untuk metode SSF.
Pengaruh Penambahan Polyvinyl Alcohol (PVOH) pada Biofoam dari Tepung Biji Nangka dan Ampok Jagung dengan Metode Thermopressing Fitrianti, Yanis; Azzahra, Rheisya Talitha; Kusumawati, Endang; Keryanti
Jurnal Teknik Kimia USU Vol. 12 No. 2 (2023): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v12i2.9228

Abstract

Starch and fiber-based biofoam as a solution to replace the role of styrofoam. However, the biofoam still unqualified as a good foam characteristic. Polyvinyl alcohol (PVOH) is added to improve the physical characteristics of biofoam. This study aims to determine the effect of PVOH addition on the quality of starch-based biofoam from jackfruit seeds and corn hominy. The gelatinization process was carried out using a mixer in 350 rpm speed at 100 °C for 5 minutes, then moulded in a thermopressing unit for 25 minutes at 100 °C. The characteristics of the material with amylose and amylopectin contents 17.30% and 31.60% respectively and corn hominy's fiber content at 2.72%. The best PVOH addition was 10% addition based on its characteristics from parameters such as water absorption, density, and biodegradability were close to Synbra Technology’s standard. However, all the physical and mechanical characteristics of the produced biofoam still can't reach the standard.
Co-Authors Abdilah, Fauzi Aceng Gima Sugiama Ade Safaat Ahmad Faizal Ahmad, Zidni Zakiyyah Alifa Dewi Kirana Amalia, Dhea Nurul Amalia, Putri Vina Ambar Susanto, Ambar Anggraeni, Nani Ari Marlina Asih, Ria Puspa Atqiyaa, Millatul Azzahra, Rheisya Talitha Chamidy, Harita Nurwahyu Citra Noer Aqsha Citra Noer Aqsha Connery Manurung, Prans Deni Ramdhani Deni Ramdhani Dewi Amalia Dewi Amalia Dewi, Widya Tresna Dini Nurcahya Dini Nurcahya Djatnika, Tjetjep Dwi Budi Santoso Endang Kusumawati Fauzan, Rizky Fauzi Abdilah Ferawati, Yohana Fransiska Fitriani, Ana Fitrianti, Yanis Ghinaa Annisa Khairani Gianistri Maulani Hariyadi, Tri Hasanah, Rizkiya Herawati Budastuti Herliana, Hanafiah Hidayah, Resti Nurul Indrita Putri, Anindya Ira Puspitasari Karina Aulia Rahmawati Krista, Gustin Mustika Manfaati, Rintis Marhani, Della Agustia Mauludin, Luthfi Muhammad Mentik Hulupi Min, Joe Lian Muhamad Nur Rojab Muhammad Hafizh Nabilah, Nida Nabilah, Tiana Hasana Nabilah, Tiana Hasna Nida Nabilah Permanasari, Ayu Ratna PUDIN, APIP Rahmawati, Karina Aulia Ramadhani, Fauziah Ramadhani, Laily Isna Ratna Yulistya Ningrum Ratna Yulistya Ningrum Retno Indarti Riski Harliyansyah Riski Harliyansyah Rizki, Anwar Muhamad Salsabila, Nurisa Sarah Sarah, Sarah Sihombing, Rony Pasonang Sri Harjati Suhardi Tiana Hasna Nabilah Tri Hariyadi Trirahayu, Dhyna Analyes Widya Tresna Dewi Yackob Astor Yulistiani, Fitria Zahra Nur Salsabila