Search Results - "Widjaja, Arief"

Effect of pretreatment method on structural changes of coconut coir dust by Sangian, Hanny F., Widjaja, Arief

“…The pretreatment of a high lignin substrate, coconut coir dust, was studied by chemical techniques (NaOH solution, ionic liquid, and NaOH followed by ionic…”
Get full text

Study of increasing lipid production from fresh water microalgae Chlorella vulgaris by Widjaja, Arief, Chien, Chao-Chang, Ju, Yi-Hsu

“…Study of increasing lipid production from fresh water microalgae Chlorella vulgaris was conducted by investigating several important factors such as the effect…”
Get full text

Enhancing Enzymatic Digestibility of Coconut Husk using Nitrogen-assisted Subcritical Water for Sugar Production by Muharja, Maktum, Fadhilah, Nur, Nurtono, Tantular, Widjaja, Arief

“…Coconut husk (CCH) as an abundant agricultural waste in Indonesia has the potential to be utilized for sugar production, which is the intermediate product of…”
Get full text

Identification of phytochemical compounds in Calophyllum inophyllum leaves by Susanto, David Febrilliant, Aparamarta, Hakun Wirawasista, Widjaja, Arief, Gunawan, Setiyo

“…Objectives: To investigate the proximate composition, mineral content, and phytochemical compounds in Calophyllum inophyllum(C. inophyllum) leaves…”
Get full text

Extractive Fed-Batch Bioacetone Fermentation with Free Cell and Immobilized Clostridium Saccharoperbutylacetonicum N1-4 in a Large Extractant Volume by Rizki Fitria Darmayanti, Maktum Muharja, Bramantyo Airlangga, Arief Widjaja, Ara Nugrahayu Nalawati

“…This study compared free and immobilized cells with palm oil and hexanol as an extractant in a large volume ratio of extractant to the broth. Fermentation was…”
Get full text

Development of a Novel Support Modification for Efficient Lipase Immobilization: Preparation, Characterization, and Application for Bio-flavor Production by Moentamaria, Dwina, Irfin, Zakijah, Chumaidi, Achmad, Widjaja, Arief, Widjaja, Tri, Muharja, Maktum, Darmayanti, Rizki Fitria

“…The low cost and excellent catalytic properties of lipase for industrial processes are highly desirable. A promising new approach involves the support…”
Get full text

Performance of modified hollow fiber membrane silver nanoparticles-zeolites Na–Y/PVDF composite used in membrane bioreactor for industrial wastewater treatment by Darmayanti, Rizki Fitria, Muharja, Maktum, Widjaja, Arief, Widiastuti, Nurul, Rachman, Rahadian Abdul, Widyanto, Alvin Rahmad, Halim, Abdul, Satrio, Dendy, Piluharto, Bambang

“…Membrane bioreactor (MBR) deteriorates due to fouling on the membrane pores, which can reduce the membrane performance. To reduce membrane fouling, the…”
Get full text

Effect of Severity Factor on the Subcritical Water and Enzymatic Hydrolysis of Coconut Husk for Reducing Sugar Production by Muharja, Maktum, Fadhilah, Nur, Darmayanti, Rizki Fitria, Sangian, Hanny Frans, Nurtono, Tantular, Widjaja, Arief

“…Preventing the further degradation of monomeric or oligomeric sugar into by-product during biomass conversion is one of the challenges for fermentable sugar…”
Get full text

Permeate flux recovery and removal foulant performances of hollow fiber polyvinylidene fluoride membrane bioreactor with peroxodisulfate activated iron (II) sulfate as a chemical cleaning agent by Rachman, Rahadian Abdul, Widiastuti, Nurul, Purnomo, Adi Setyo, Widjaja, Arief, Mumtazah, Zuhriah, Darmayanti, Rizki Fitria, Muharja, Maktum

“…•PDS activated with Fe2+ demonstrates superior membrane cleaning efficacy in PVDF-MBR.•PDS/Fe2+ exhibits greater stability to flux and COD rejection compared…”
Get full text

A Performance Study of Home-Made Co-Immobilized Lipase from Mucor miehei in Polyurethane Foam on The Hydrolysis of Coconut Oil to Fatty Acid by Moentamaria, Dwina, Muharja, Maktum, Widjaja, Tri, Widjaja, Arief

“…Bio‐based fatty acids (FAs) produced through hydrolysis of natural oils and fats are promising chemical feedstocks for increasing  the economic value of…”
Get full text

Analisis Tekno-Ekonomi Produksi Gula Reduksi dari Biomassa Ampas Tebu Melalui Hidrolisis Air Subkritis by Muharja, Maktum, Fadilah, Siska Nuri, Fadhilah, Nur, Darmayanti, Rizki Fitria, Widjaja, Arief, Khamil, Achri Isnan

“…Subcritical water hydrolysis of bagasse requires energy to convert lignocellulosic biomass into fermentation-ready sugars. Bagasse biomass has the potential to…”
Get full text

Subcritical Water Process for Reducing Sugar Production from Biomass: Optimization and Kinetics by Muharja, Maktum, Widjaja, Arief, Darmayanti, Rizki Fitria, Fadhilah, Nur, Airlangga, Bramantyo, Halim, Abdul, Fadilah, Siska Nuri, Arimbawa, I Made

“…The competitive reactions of lignocellulose hydrolysis and monosaccharide degradation in the subcritical water (SCW) hydrolysis of coconut husk were…”
Get full text

Isolation and identification of cholestane and dihydropyrene from Calophyllum inophyllum by Susanto, David Febrilliant, Aparamarta, Hakun Wirawasista, Widjaja, Arief, Jadid, Nurul, Gunawan, Setiyo

“…The highest population of Calophyllum inophyllum is in Indonesia. One of the bioactive compound contained in C. inophyllum leave is cholestane. The extraction…”
Get full text

Optimization of Sugarcane Bagasse Ash Utilization for Concrete Bricks Production Using Plackett-Burman and Central Composite Design by Muharja, Maktum, Darmayanti, Rizki Fitria, Widjaja, Arief, Manurung, Yakub Hendrikson, Alamsah, Ilham, Fadilah, Siska Nuri

“…PT. Industri Gula Glenmore (PT. IGG) setiap tahunnya memproduksi 14.300 ton abu ampas tebu (AAT) sebagai hasil samping pembakaran boiler yang belum…”
Get full text

Synergistic Effect of Two Type Cellulase Immobilized on Chitosan Microparticle as Biocatalyst for Coconut Husk Hydrolysis by Hamzah, Afan, Sitompul, Lidya Lorenta, Putri, Irma Nurhanifah Fenda, Soeprijanto, Soeprijanto, Widjaja, Arief

“…The effectivity of employing two types of cellulases from Aspergillus niger and Trichoderma resei covalently immobilized on chitosan microparticle was…”
Get full text

Mathematical Modelling of Alkaline and Ionic Liquid Pretreated Coconut Husk Enzymatic Hydrolysis by Fatmawati, Akbarningrum, Anggoro, Ari, Muslim, Kamila Adila, Widjaja, Arief, Nurtono, Tantular, Sangian, Hanny Frans

“…The problem of crude oil reserve shortage and air quality decline currently have led researches on renewable fuel such as bioethanol and biohydrogen. The…”
Get full text

Cellulase and Xylanase Immobilized on Chitosan Magnetic Particles for Application in Coconut Husk Hydrolysis by Afan Hamzah, Sidratu Ainiyah, Dwi Ramadhani, Gek Ela Kumala Parwita, Yeni Rahmawati, Soeprijanto, Hiroyasu Ogino, Arief Widjaja

“…Cellulase and xylanase were covalently immobilized on chitosan magnetic particles. They were employed as catalysts to produce reducing sugar from coconut husk…”
Get full text

Comparative Study of Batchwise Solvent Extraction and the Microwave Assisted Extraction Method for the Purification of Triglyceride for Biodiesel Feedstock from Crude Calophyllum Inophyllum Oil (CCIO) by Hakun Wirawasista Aparamarta, Setiyo Gunawan, Badril Azhar, Hanggoro T. Aditya, Arief Widjaja, Yi Hsu Ju

“…Recently, edible oil has been employed for biodiesel feedstocks. However, the use of such oil to fulfil energy demand raises certain problems, such as the…”
Get full text

Electrochemical Processes for the Formation of Hydroxyapatite Powders by Nur, Adrian, Setyawan, Heru, Widjaja, Arief, Lenggoro, I. Wuled

“…Electrochemical synthesis of hydroxyapatite particles was performed from a homogeneous solution of Na2H2EDTA.2H2O, KH2PO4 and CaCl2 without stirring to…”
Get full text

Application of Ionic Liquid [DMIM]DMP Pretreatment in the Hydrolysis of Sugarcane Bagasse for Biofuel Production by Widjaja, Arief, Agnesty, Silvya Yusnica, Sangian, Hanny F., Gunawan, Setiyo

“…Sugarcane bagasse is one of lignocellulose materials that can be converted to biofuel. This work was aimed to develop new pretreatment combination methods to…”
Get full text