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All Journal International Journal of Renewable Energy Development Jurnal Kompetensi Teknik Jurnal Bahan Alam Terbarukan Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran Bulletin of Chemical Reaction Engineering & Catalysis RANDANG TANA - Jurnal Pengabdian Masyarakat Jurnal Inovasi Teknik Kimia Jurnal Pengabdian Masyarakat: Darma Bakti Teuku Umar PENGABDI: Jurnal Hasil Pengabdian Masyarakat REACTOR : Journal of Research On Chemistry And Engineering International Journal of Research Innovation and Entrepreneurship Journal of Industrial Community Empowerment International Journal of Renewable Energy Development Bulletin of Chemical Reaction Engineering & Catalysis
Haniif Prasetiawan
Universitas Negeri Semarang
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Social Sciences Other

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FRACTAL KINETICS ANALYSIS OF ENZYMATIC HYDROLYSIS OF SAWDUST USING CELLULASE IN ETHANOL PRODUCTION Megawati, Megawati; Fardhyanti, Dewi Selvia; Prasetiawan, Haniif; Hartanto, Dhoni; Khoiroh, Ianatul; Suwito, Slamet; Kuntoro, Kuntoro
Jurnal Bahan Alam Terbarukan Vol 7, No 2 (2018): December 2018 [Nationally Accredited]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v7i2.11398

Abstract

Sawdust is one of the abundantly lignocellulosic materials in the world. Sawdust is considered promosing for ethanol production, because it contains mainly lignin, hemicellulose, and cellulose. The drying process was applied to pretreat sawdust to make its degradation process easier. Biodegradation of sawdust was conducted by enzymatic hydrolysis using cellulase. The volume of cellulase in the hydrolysis substrate was varied from 5 to 9% v/v. The sugar concentration produced by enzymatic hydrolysis of sawdust every 1 h was recorded as well as its fractal kinetics analysis. Fermentation using yeast in 5 days was also performed to convert sugar hydrolysate to ethanol. Optimal sugar concentration in hydrolysate obtained was about 0.15 mol/L with cellulase volume of 9% v/v and its ethanol concentration was about 0.059% v/v. Fractal kinetics models by Kopelman and Valjamae which can quantitatively describe enzymatic hydrolysis of sawdust using cellulase were used. However, the result of this study indicated that, at high enzyme volume (9% v/v), Valjamae model was more suitable than Kopelman. The fractal exponent value (h) was about 0.667 and the rate constants (k) were about 0.44, 0.53, and 0.58 1/h at the enzyme volume of 5, 7, and 9% v/v. Thus, it can be concluded that enzyme volumes significantly effect rate constants.
Improving the Quality of Bio-Oil Produced from Rice Husk Pyrolysis by Extraction of its Phenolic Compounds Fardhyanti, Dewi Selvia; Chafidz, Achmad; Triwibowo, Bayu; Prasetiawan, Haniif; Cahyani, Novia Noor; Andriyani, Sinta
Jurnal Bahan Alam Terbarukan Vol 8, No 2 (2019): December 2019 [Nationally Accredited - Sinta 2]
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v8i2.22530

Abstract

Rice husk is an agricultural waste which contains 50% cellulose, 25%-30% lignin and 15%-20% silica. It can be used as raw material of bio-oil. Bio-oil is liquid which produced by pyrolysis process. Bio-oil can be produced from the rice husk at 773 and 873 K. The main component of Bio-oil from rice husk pyrolysis at 773 and 873 K is phenolic compounds about 47.98% and 62.65%, respectively. It causes corrosive, low heating value, high acidity, high viscosity and unstable that causing an engine damage. The presence of phenolic compound decreases the quality of bio-oil. Therefore, it needs a process such as liquid-liquid extraction to reduce the phenolic compound using 80% methanol and 80% chloroform as a solvent. The extract and raffinate phase were analyzed using UV-Vis spectrophotometer. The aim of this research determine the effect of temperature pyrolysis for the characterization of bio-oil, the stirring speed and the temperature of the extraction for the distribution coefficient and the yield of phenolic compound. The results showed that the characterization of bio-oil produced from rice husk pyrolysis at 773 and 873 K are densities 1,040 and 1,042 Kg/m3; viscosities 9.3488 and 9.5007 cSt; acid numbers 46.75 and 52.45 mg KOH/g; pH 2.5 and 3; flash points 426 and 423 K and heating values 3.229 and 3.339 MJ/kg, respectively. The highest distribution coefficient and yield were obtained at 323 K and a stirring speed of 250 rpm. The distribution coefficient of bio-oil produced by pyrolysis at 773 and 873 K is 1.504, and 1.528, respectively. The yields of bio-oil produced by pyrolysis at 773 and 873 K are 58.885%, and 48.429%, respectively.  
Studi pola aliran pada tangki aquaponik dengan isian media filter hidroton Prasetiawan, Haniif; Rengga, Wara Dyah Pita; Hisyam, Anwaruddin
Jurnal Kompetensi Teknik Vol 9, No 1 (2017)
Publisher : Fakultas Teknik, Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jkomtek.v9i1.11878

Abstract

Pada daerah dengan keterbatasan sumber daya air, aquaponik merupakan solusi yang paling tepat sebagai metode untuk bercocok tanam. Aquaponik adalah penggabungan dua sistem yaitu aquakultur dengan hidroponik. Pada sistem ini, ikan pada aquakultur akan mendapatkan air bersih yang telah melalui proses filtrasi pada sistem hidroponik, sedangkan sistem hidroponik akan mendapatkan nutrisi yang dibutuhkan oleh tanaman dari hasil ekskresi ikan pada aquakultur. Aquaponik dapat disimpulkan sebagai sistem mutualisme bagi tumbuhan, hewan, dan mikroorganisme yang mengadaptasi prosse sirkulasi di alam. Untuk membuat sistem aquaponik yang optimal maka kebutuhan hidroton yang tepat pada tangki aquaponik perlu di perhitungkan. Simulasi tangki aquaponik dengan isian hidroton dilakukan dengan menggunakan model turbulen k-epsilon. Hidroton sebagai media fiter pada tangki dimmodelkan sebagai porous zone dengan mendeskripsikan permeabilitas dan koefisien inertial loss dari hidroton tersebut. Simulasi dilakukan dengan menggunaan beberapa variasi yaitu simulasi aliran pada tangki tanpa hidroton, dan tangki dengan isian hidroton sebanyak 10%, 20%, 30%, 40%, dan 50% volume total tangki. Dari hasil simulasi ini diperoleh bahwa Tangki aquaponik dengan isian hidroton sebanyak 40% v/v dengan kecepatan rata-rata sebesar 1,2917 m/s 
The Processing of Industrial Tofu Dreg Waste into Animal Feed in Sumurrejo Village, Semarang Kusumaningtyas, Ratna Dewi; Hartanto, Dhoni; Prasetiawan, Haniif; Triwibowo, Bayu; Maksiola, Masni; Kusuma, Andre Dianata Hogi; Fidyawati, F; Mezaki, Naufal Mudrik; Mutaqin, Afrizal Mai; Loveyanto, Rendy Okta
Rekayasa : Jurnal Penerapan Teknologi dan Pembelajaran Vol 18, No 2 (2020): December 2020
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/rekayasa.v18i2.27278

Abstract

Tofu is famous as a favorite, healthy, nutritious and cheap food in Indonesia. The tofu industry has been growing rapidly in this country in the form of household scale businesses or MSME (Micro, Small and Medium Enterprises). Among the tofu MSME centers in Semarang is the one in Sumurrejo Village, Gunungpati District. Sumurrejo village has various business potentials that are capable of driving the community’s economy, especially the entrepreneurship of tofu and tempeh MSMEs, as well as dairy and beef cattle farming. The MSMEs in this area are growing rapidly and able to improve the economy of the local community. In spite of this positive impact, the existence of tofu industry also has a negative effect since its waste causes environmental pollution problems. One of them is tofu dreg waste which can cause pollution to the environment due to its bad smell, organic matters content, and putrefaction potential. One effort to overcome this problem is to process the tofu dreg waste into animal feed. Tofu waste has high nutritions which consist of 8.66% protein, 3.79% fat, 51.63% water and 1.21% ash. Therefore, in order to resolve the environmental problems caused by the disposal of tofu waste and the problem of the high price of commercial animal feed, it is necessary to conduct community service activities to increase the added value of tofu waste by processing it into animal feed through fermentation process. Tofu pulp fodder produced in this activity was also tested on chickens. Chickens that were feed with tofu waste shown a better weight gain than those given regular fodder (pur). Training on tofu waste processing into fodder was very useful for the community within the area of the tofu industry in Sumurrejo Village because it could overcome the environmental problems caused by tofu dreg waste and could provide cheap, nutritious, safe animal feed and support the livestock growth. Community service activities were conducted by providing knowledge and skills through lecturing, practice and skills training, as well as monitoring activities.
Comparative Study on the Various Hydrolysis and Fermentation Methods of Chlorella vulgaris Biomass for the Production of Bioethanol Megawati, Megawati; Bahlawan, Zuhriyan Ash Shiddieqy; Damayanti, Astrilia; Putri, Radenrara Dewi Artanti; Triwibowo, Bayu; Prasetiawan, Haniif
International Journal of Renewable Energy Development Vol 11, No 2 (2022): May 2022
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2022.41696

Abstract

One of the microalgae that can be potentially used to produce bioethanol is Chlorella vulgaris, as it is rich in carbohydrates. However, the carbohydrates in C. vulgaris cannot be converted directly into ethanol. This study aimed to investigate the chemical and enzymatic hydrolysis of C. vulgaris, which is subsequently followed by fermentation. The catalysts used in the chemical hydrolysis were hydrochloric acid, sodium hydroxide, and potassium hydroxide, while the enzymes used were the mixture of alpha-amylase + glucoamylase, alpha-amylase + cellulase, and alpha-amylase + glucoamylase + cellulase. The hydrolysate obtained from chemical hydrolysis was fermented through Separate Hydrolysis Fermentation (SHF), while the one from enzymatic hydrolysis was fermented through Simultaneous Saccharification and Fermentation (SSF), in which both processes used S. cerevisiae. After undergoing five hours of enzymatic hydrolysis (using alpha-amylase + glucoamylase), the maximum glucose concentration obtained was 9.24 ± 0.240 g/L or yield of 81.39%.  At the same time and conditions of the substrate on chemical hydrolysis, glucose concentration was obtained up to 9.23 + 0.218 g/L with a yield of 73.39% using 1 M hydrochloric acid. These results indicate that chemical hydrolysis is less effective compared to enzymatic hydrolysis. Furthermore, after 48 hours of fermentation, the ethanol produced from SHF and SSF fermentation methods were 4.42 and 4.67 g/L, respectively, implying that producing bioethanol using the SSF is more effective than the SHF method.
Optimization of Terpenoid Extraction from Bay (Syzygium polyanthum) Leaves using Ethanol as a Solvent by an Ultrasonic Wave Technology Kusumaningrum, Maharani; Prasetiawan, Haniif; Setiyorini, Nurul; Dewanti, Astiara Anis; Rengga, Wara Dyah Pita
International Journal of Research Innovation and Entrepreneurship Vol 1 No 1 (2020): June 2020
Publisher : Universitas Negeri Semarang

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

Abstract

Bay is one of the medicinal plants. Bay leaves have been used in the pharmaceutical and food industry as an antimicrobial. The chemical compounds in the leaves that served as an antimicrobial were terpenoids. This study aims to determine the optimum extraction conditions of bay leaves using a response surface methodology (RSM). Ten grams of dried and mashed bay leaves was extracted for 60 minutes using ethanol as a solvent. The extraction was conducted at various temperatures (60, 70, 80 oC) and various ratios of the starting material to solvent (1: 8, 1:10, 1:12 g/g) for 60 min. The optimum extraction condition based on the RSM results was achieved at 70 °C with a ratio of the starting material to solvent of 1:12 g/g resulting in the extract yield of 9.69%. The results of the GC-MS analysis on the obtained extracts showed that 33% of terpenoids was obtained from the extraction at the optimum condition.
REKAYASA PROSES DISTILASI EKSTRAKTIF PADA PEMBUATAN PELARUT BERBASIS HIDROKARBON DENGAN MENGGUNAKAN ENTRAINER SULFOLANA Haniif Prasetiawan; Ratna Dewi Kusumaningtyas; Bayu Triwibowo; Dhoni Hartanto; Muhammad Fikri Al Ghifari; Syifa Karimah
Jurnal Inovasi Teknik Kimia Vol 7, No 1 (2022)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v7i1.6032

Abstract

Pelarut atau solvent merupakan salah satu komponen penting dalam proses kimia pada industri kimia. Salah satu jenis pelarut yang sering digunakan pada industri cat dan pelapis yaitu pelarut berbasis hidrokarbon yang terdiri dari campuran cairan kompleks yang beragam dan mengandung unsur alifatik, alisiklik dan aromatik (C5-C8). Aromatik hidrokarbon merupakan polutan lingkungan yang terkenal bersifat toksik, karsinogenik dan mutagenik sehingga dibutuhkan pelarut berbasis hidrokarbon dengan kandungan aromatik dibawah 1%. Metode pemisahan yang tepat untuk memisahkan komponen aromatik dan nonaromatik yang memiliki titik didih berdekatan adalah distilasi ekstraktif dengan entrainer sulfolana. Pada penelitian ini, sistem distilasi dengan entrainer sulfolana dijalankan menggunakan process simulation software Aspen Plus V.10 dengan tujuan untuk mengetahui pengaruh jumlah sulfolana, feed stage dan jumlah stage terhadap sifat fisis pelarut berbasis hidrokarbon serta analisis energi dan ekonominya. Simulasi ini difokuskan pada variasi rasio sulfolana:crude feed ( 7:1, 7,5:1, 8:1, 8,5:1), variasi feed stage (stage ke-10 sampai ke-35) dan variasi jumlah stage (70,75,80). Hasil penelitian didapatkan kondisi optimum yaitu menggunakan rasio sulfolana:crude feed  8,5:1, feed stage ke-25 dan jumlah stage 80. 
Pelatihan Pemanfaatan Ekstrak dari Limbah Eceng Gondok pada Pembuatan Hand Sanitizer sebagai Antiseptik Alami Haniif Prasetiawan; Bayu Triwibowo; Maharani Kusumaningrum; Zuhriyan Ash Siddieqy Bahlawa; Dewi Selvia Fardhyanti; Dewi Artanti Putri
Randang Tana - Jurnal Pengabdian Masyarakat Vol 5 No 3 (2022): Randang Tana - Jurnal Pengabdian Masyarakat
Publisher : Unika Santu Paulus Ruteng

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36928/jrt.v5i3.1289

Abstract

This article aims to describe the use of water hyacinth leaves as an ingredient for making hand sanitizers or natural antiseptic gels. Water hyacinth leaves will not cause microbial resistance due to the complexity of water hyacinth leaves containing flavonoids (luteolin, apigenin, tricin, chrysoeriol, kaempferol, azaeleatin, gossypetin, and orientin) and tannins contained in water hyacinth leaves are proven to be effective as antibacterial and antimicrobial agents. Based on this potential, water hyacinth leaves are very likely to be used as a natural antiseptic. The hand sanitizer produced in this activity has gone through a preference test on the community by looking at the preferences for color, thickness, moist impression, aroma (fragrance), and packaging. The teenager community in the RW 027, Batursari, Mranggen District, Demak Regency. With this activity, the teenager community can gain knowledge about the use of water hyacinth leaf extract as a natural hand sanitizer that is environmentally friendly and can make hand sanitizer products independently. Thus, the application of making water hyacinth leaf extract hand sanitizer can be applied in the area.
Pengaruh Variasi Kondisi Operasi pada Kolom Distilasi Ekstraktif terhadap Sifat Fisis Pelarut Hidrokarbon Terdearomatisasi Haniif Prasetiawan; Wara Dyah Pita Rengga; Dewi Selvia Fardhyanti; Bayu Triwibowo; Achmad Chafidz
REACTOR: Journal of Research on Chemistry and Engineering Vol 3, No 2 (2022): Published in December 2022
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v3i2.60

Abstract

Solvent is one of the important components in chemical processes. The type of solvent that is often used in the paint and coating industry is a hydrocarbon-based solvent which consists of a diverse complex mixture of liquids and contains aliphatic, alicyclic and aromatic (C5-C8) elements. Aromatic hydrocarbons are environmental pollutants that are known to be toxic, carcinogenic and mutagenic, so a hydrocarbon-based solvent with an aromatic content of less than 1% is needed. An appropriate separation method for separating aromatic and nonaromatic components having close boiling points is extractive distillation with a sulfolane entrainer. In this study, a distillation system with a sulfolane entrainer was run using the process simulation software Aspen Plus with the aim of understanding the effect of the amount of sulfolane, feed stage and number of stages on the physical properties of hydrocarbon-based solvents. This simulation is focused on the variation of the ratio of sulfolane: crude feed (7:1, 7.5:1, 8:1, 8.5:1), the variation of the feed stage (10th stage to the 35th stage) and the variation of the number of stages (70, 75, 80). It was found that the number of stages did not affect the density and flash point of the solvent. An increase of number of stage will decrease the solvent flash point and density. Significant decreament also can be found when the sulfolane to crude feed ratio is increased. However, the physical properties of the current dearomatized solvent is close to the properties of commercial product namely SBP 65/70 from one of oil and gas companies.
Enzymatic Interesterification of Crude Palm Oil with Methyl acetate: Effect of Pre-treatment, Enzyme’s Dosage and Stability Muhammad Zarin Amin Zainal; Harumi Veny; Fazlena Hamzah; Miradatul Najwa Muhd Rodhi; Andri Cahyo Kumoro; Ratna Dewi Kusumaningtyas; Haniif Prasetiawan; Dhoni Hartanto
Bulletin of Chemical Reaction Engineering & Catalysis 2023: Just Accepted Manuscript and Article In Press 2023
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17763

Abstract

In the present study, biodiesel was produced via the enzymatic interesterification of Crude Palm Oil (CPO) and methyl acetate within ultrasonic condition. In contrast to alcohol, methyl acetate as an acyl acceptor does not inhibit lipase activity and can create triacetin as a useful byproduct.  In this work, Immobilized lipase from Candida Antartica A (CaLA) was utilized as biocatalyst and the effect of using non-pretreated CPO and pre-treated CPO as feedstock were explored. The pre-treatment of CPO involves degumming with acid, washing with water, and bleaching. The enzymatic interesterification was conducted in three-neck flasks using an ultrasonic water bath at 45o C.  Few parameter effects on biodiesel production were also investigated, including the effect of molar ratio of CPO to methyl acetate, the effect amount of lipase, and the reusability of immobilized lipase (CaLA) in the interesterification reaction.  The highest average Biodiesel yield of 80.6% was obtained from pretreated CPO at a molar ratio of 1:9 with 100 mg (1% w/v) of Immobilized CaLA, after three hours of reaction. Further research on the reusability of immobilized CaLA revealed that the yield of biodiesel reduced significantly after the second run. The results of the present study also demonstrated that Immobilized CaLA performed well at low concentrations but had low stability, with productivity decreasing to 92% upon reuse after the initial run. In order to make Immobilized lipase economically viable, further research must be conducted to overcome its low stability in the reaction.
Co-Authors Achmad Chafidz Ajeng Riswanti Wulandari Andri Cahyo Kumoro Anwaruddin Hisyam Anwaruddin Hisyam Astrilia Damayanti Astrilia Damayanti Bahlawan, Zuhriyan Ash Shiddieqy Bayu Triwibowo Bayu Triwibowo Cahyani, Novia Noor Catur Rini Widyastuti, Catur Rini Chafidz, Achmad Daniel Setiyo Nugroho Dewanti, Astiara Anis Dewi Artanti Putri Dewi Selvia Fardhyanti Dhoni Hartanto Dwi Prasojo Dyta Silvia Mayasari Fauzan Amrullah Fazlena Hamzah Fazlena Hamzah Fidyawati, F Hadiyanto Hadiyanto Hamzah, Fazlena Harumi Veny Harumi Veny I. Istadi Khoiroh, Ianatul Kuntoro Kuntoro Kusuma, Andre Dianata Hogi Loveyanto, Rendy Okta Maharani Kusumaningrum Maksiola, Masni Megawati - Megawati Megawati Megawati Megawati Mezaki, Naufal Mudrik Miradatul Najwa Muhd Rodhi Miradatul Najwa Muhd Rodhi Mohamad Nor, Nur Fatin Syafiqah Muhammad Fikri Al Ghifari Muhammad Zarin Amin Zainal Muhd Rodhi, Miradatul Najwa Mutaqin, Afrizal Mai Radenrara Dewi Artanti Putri Radenrara Dewi Artanti Putri, Radenrara Dewi Artanti Ratna Dewi Kusumaningtyas Sarina Sulaiman Sazali, Rozana Azrina Setiyorini, Nurul Sinta Andriyani Suwito, Slamet Syifa Karimah Veny, Harumi Wara Dyah Pita Rengga Widya FATRIASARI Zuhriyan Ash Siddieqy Bahlawa