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All Journal Jurnal Teknologi Pangan Jurnal Teknik Kimia Jurnal Fisika Unand Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Chemistry Indonesian Journal of Chemical Research JAST : Jurnal Aplikasi Sains dan Teknologi BUANA SAINS Jurnal Teknik Kimia dan Lingkungan Madani: Jurnal Pengabdian Masyarakat dan Kewirausahaan
Nana Dyah Siswati, Anwar Zain and Mohammad
Program Studi Teknik Kimia Fakultas Teknologi Industri Universitas Pembangunan Nasional “VETERAN”Jatim
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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PEMANFAATAN PATI UBI JALAR SEBAGAI BAHAN BAKU PEMBUATAN PATI BERKATION DENGAN PROSES HIDROLISIS Nana Dyah Siswati; Siltje Rivana; Zuroida Novi A.
BUANA SAINS Vol 7, No 2 (2007)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (195.127 KB) | DOI: 10.33366/bs.v7i2.197

Abstract

Cationic starch is as modified starch that is used in paper industry as glue, additive and surface sizing agent. Modification of starch will happen under gelatinization temperature. To avoid the gelatinization an alkaline salt of Na2SO4 is need. This experiment was done by using sweet potato starch reacted with nitrogen containing dimethyl ammonium chloride. Effects of adding Na2SO4 at concentrations of 0,5, 1, 1,5, 2, 2,5% of the total material weight and at 40; 50; 60; 70;80 oC heating temperature were measured for this study. To indicate the best quality of cationic starch DS (Substitution Degree) standard grade available in paper industry between 0,02 – 0,04.was used. The best result was reached on concentration of 1% Na2SO4 and 40 oC heating temperature, the yield was 91,71% and DS grade was 0.036 (meeting the DS standard grade)
KAJIAN PENAMBAHAN Effective Microorganisms (EM4) PADA PROSES DEKOMPOSISI LIMBAH PADAT INDUSTRI KERTAS Nana Dyah Siswati; Herwindo Theodorus; Puguh Wahyu Eko S
BUANA SAINS Vol 9, No 1 (2009)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.292 KB) | DOI: 10.33366/bs.v9i1.225

Abstract

The solid waste at PT Kertas Leces Probolinggo has not been properly handled as it is just ended in the waste landfill. Composting is a method to process the solid waste with a high organic content. In that process the organic agent is degraded by micro organism that driving to stabilize the organic content. In this research effective micro organism (EM4) was used as a disspator organism in some range of concentrate (2,4,6,8,10) (%) v/b and observed in 5,10,15,20,25 days composting time. The best result was reached on the concentrate of 2 % EM4 & 25 days decomposting time, with the rasio C/N = 14,11 (most land has rasio indicator C/N closed to 10) comparing to the previous grade = 33,24.
KAJIAN PENGARUH KONSENTRASI ENZIM TRIPSIN DAN PH TERHADAP KUALITAS VIRGIN COCONUT OIL Nana Dyah Siswati; Eko Nurcahyo; Masyitoh Febrianti
BUANA SAINS Vol 7, No 1 (2007)
Publisher : Universitas Tribhuwana Tunggadewi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (161.63 KB) | DOI: 10.33366/bs.v7i1.124

Abstract

Coconut oil is vegetable oil extracted from coconut flesh. Based on the content of its fatty acid, coconut oil is put into laurat acid oil group because it has the biggest content of laurat acid which is 53 % compared to other fatty acids. One of the methods of VCO extraction is the use of protease. The research method was performed by adding Tripsin enzyme having 0 %, 0.02 %, 0.04 %, 0.06 % and 0.08 % concentrate into coconut milk with various pH (3, 4, 5, 6, 7). Then it was stirred and left for about 20 hours. Finally, the oil was extracted and the laurat acid content was analyzed. The result showed that the best condition was obtained when Tripsin enzyme concentrate was 0.08 % and pH was 6 with the obtained laurat acid was 52.68 %
PENGELOLAAN SAMPAH RUMAH TANGGA DI LINGKUNGAN RT.1 - RT.14/RW IV KELURAHAN RUNGKUT MENANGGAL KECAMATAN GUNUNGANYAR KOTA SURABAYA Nana Dyah Siswati; Luluk Edahwati
JAST : Jurnal Aplikasi Sains dan Teknologi Vol 1, No 1 (2017): JAST
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/jast.v1i1.720

Abstract

Sampai saat ini sampah masih menjadi permasalahan yang belum terpecahkan di Surabaya, LPA Benowo menerima total 1.283 ton sampah per hari dari seluruh wilayah Surabaya. Kondisi demikian jika tidak mengubah teknologi pengelolaan sampahnya, dipastikan dalam 4-5 tahun mendatang, TPA Benowo tidak lagi mampu menampung sampah warga Surabaya. Wilayah Rukun Warga (RW) IV Kelurahan Rungkut Menanggal Kecamatan Gununganyar Surabaya merupakan salah satu lokasi pemukiman teratur yang berada di wilayah Surabaya Timur dan dikenal sebagai Perumahan Rungkut Menanggal Harapan, terbagi menjadi 14 RT (RukunTetangga). Jumlah penduduk sekitar 3500 orang terdiri dari 845 KK (Kepala Keluarga) (Data RW IV, 2012). Setiap KK menghasilkan sampah ± 1kg/hari, sehingga seluruh RW menghasilkan sampah 845 kg/hari. Untuk membantu mengurangi jumlah sampah yang masuk di TPA Benowo, maka Tim IbM melakukan kegiatan daur ulang sampah organik dengan penekanan pada proses pengomposan. Tujuan dari kegiatan tersebut adalah untuk memberikan nilai tambah sampah dengan menjadikannya pupuk organik yang bernilai ekonomis selain itu dapat mengurangi volume sampah yang masuk ke LPA Benowo dengan demikian secara otomatis ikut ambil bagian dalam menyelesaikan masalah sampah kota Surabaya. Metode yang digunakan adalah pemberdayaan masyarakat melalui kegiatan penyuluhan, pelatihan dan pendampingan. Hasil yang diharapkan adalah terciptanya kualitas lingkungan yang lebih baik dan bebas dari bahan pencemar (polusi). Kata kunci : sampah, kompos dan EM4 .
Pemanfaatan Limbah Padat Penyulingan Daun Cengkeh Menjadi Biobriket Di Desa Kalipucang Af'ida, Layyinatul; Sani, Sani; Siswati, Nana Dyah
Madani: Jurnal Pengabdian Masyarakat dan Kewirausahaan Vol. 2 No. 2 (2024): Januari 2024
Publisher : LPPM Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/madani.v2i2.8685

Abstract

Daun cengkeh kering dari hasil penyulingan minyak atsiri daun cengkeh seringkali dipandang sebagai limbah industri yang pemanfaatannya masih kurang. Limbah daun cengkeh ini biasanya hanya digunakan sebagai bahan bakar tambahan untuk proses penyulingan di Desa Kalipucang. Sehingga limbah tersebut dapat dimanfaatkan untuk diolah menjadi biobriket dengan campuran arang sekam padi. Biobriket adalah sumber energi alternatif yang terbuat dari campuran biomassa dengan proses karbonisasi bersuhu tinggi. Tujuan dari pemanfaatan limbah daun cengkeh yaitu untuk mengurangi limbah yang terbuang dan menjadikannya produk yang memiliki nilai jual bagi masyarakat Desa Kalipucang. Metode pelaksanaan yang dilakukan yaitu pembuatan biobriket daun cengkeh dan penyuluhan kepada masyarakat. Hasil capaian kegiatan ini adalah briket daun cengkeh yang ramah lingkungan. Pembuatan biobriket daun cengkeh ini diharapkan mampu menjadi solusi alternatif terhadap limbah penyulingan daun cengkeh di Desa Kalipucang.
Asap Cair dari Daun Jati sebagai Pestisida untuk Mengendalikan Kutu Putih : Liquid Smoke from Teak Leaves as Pestiside to Control Whiteflies Kaffah, Elsyaff Visshilmi; Kusuma, Meidina Rafida; Siswati, Nana Dyah; Erliyanti, Nove Kartika
Jurnal Rekayasa Bahan Alam dan Energi Berkelanjutan Vol. 7 No. 1 (2023)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rbaet.2023.007.01.02

Abstract

Jati merupakan salah satu tanaman yang banyak dijumpai di Indonesia. Daun jati memiliki komponen lignin, selulosa, dan hemiselulosa yang dapat diurai menjadi fenol dan asam dalam bentuk cairan, disebut asap cair, dengan proses pirolisis yang bermanfaat sebagai pestisida nabati. Tujuan dari penelitian ini adalah untuk membuat asap cair dari limbah daun jati kering dengan metode pirolisis, mencari temperatur dan waktu relatif baik untuk memperoleh kadar fenol dan asam relatif baik dalam asap cair, dan menguji keefektifan asap cair sebagai pestisida nabati untuk hama kutu putih. Proses yang digunakan dalam penelitian ini yaitu pirolisis dengan tahapan karbonisasi lalu dilanjutkan dengan tahap kondensasi agar didapatkan asap cair. Proses pirolisis dilakukan dengan variasi temperatur (°C) 200, 250, 300, 350, dan 400 serta waktu proses pirolisis (jam) 1, 1 ½, 2, 2 ½, dan 3. Diperoleh asap cair relatif baik pada suhu 350°C dan waktu 3 jam karena memiliki kandungan fenol dan asam tertinggi yang masih sesuai dengan SNI, yaitu fenol sebesar 1,915% dan asam sebesar 14,885%. Asap cair relatif baik dilakukan uji keefektifan untuk menghilangkan hama kutu putih dengan konsentrasi 20% dan didapatkan hasil bahwa asap cair relatif baik efektif menghilangkan hama kutu putih dalam kurun waktu sembilan hari
Peningkatan Kualitas Bio-Oil Hasil Pirolisis Cangkang Kelapa Sawit Berstandar Pelumas Organik Wiraya, Wira Arta; Rifaldi, Kornelius; Muljani, Srie; Siswati, Nana Dyah; Karaman, Novel
Jurnal Fisika Unand Vol 14 No 3 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.3.249-254.2025

Abstract

Palm kernel shells are biomass waste that has the potential to be processed into bio-oil through pyrolysis, but its quality needs to be improved to meet organic lubricant standards. This study aims to improve the quality of bio-oil through a transesterification process with activated carbon-NaOH catalyst and the addition of guar gum as a thickening agent. Pyrolysis was carried out at a temperature of 300°C for 60 minutes, and transesterification at a temperature of 60°C for 2 hours with a methanol:bio-oil ratio of 6:1. The results showed that increasing the amount of catalyst up to 10% increased the yield of methyl ester, while the addition of guar gum increased the kinematic viscosity to 7.9 cst, approaching commercial lubricant standards such as top 1 Evo 5W-30 and pertamina fastron gold 5W-30. However, the flash point is still lower than industrial lubricants. Thus, the quality of bio-oil from palm kernel shell pyrolysis can be improved to approach organic lubricant standards, making it a more environmentally friendly alternative lubricant and has the potential for industrial applications.
Precipitation Method for LTA Zeolite Synthesis and Structural Characterization Andita, Jessica Shierly; Putri, Amalia Eka; Siswati, Nana Dyah; Suprihatin, Suprihatin; Nurcholis, Fachrul
Jurnal Teknik Kimia dan Lingkungan Vol. 9 No. 1 (2025): April 2025
Publisher : Politeknik Negeri Malang

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

Abstract

The demand for large-scale industrial applications of zeolite has driven the development of synthetic zeolite as an alternative to natural zeolite, which is limited by availability and production constraints. This study investigates the synthesis of LTA (Linde Type A) zeolite using a precipitation method, focusing on the effects of stirring time and aging time on zeolite yield and crystallinity. The synthesis process involved preparing sodium aluminate and sodium silicate solutions, followed by controlled crystallization at 80°C for 8h. The resulting zeolite was analyzed using X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM) to determine its phase purity, morphology, and Si/Al ratio. The results showed that optimal zeolite yield (24.75%) was obtained with 3h of stirring and 24h of aging. SEM analysis confirmed the cubic morphology characteristic of LTA zeolite, while EDS analysis determined an Si/Al ratio of 1.44, classifying the product as LTA zeolite. These findings highlight the significance of controlled stirring and aging conditions in optimizing zeolite synthesis for industrial applications.
Sintesis Surfaktan Natrium Lignosulfonat (C20H24Na2O10S2) Berbahan Dasar Serbuk Kayu Mahoni Menggunakan Proses Sulfonasi. Maulida, Nabilah; Aisah; Perwitasari, Dyah Suci; Siswati, Nana Dyah; Sani
Jurnal Fisika Unand Vol 14 No 4 (2025)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.14.4.421-427.2025

Abstract

Furniture production made from mahogany wood produces sawdust that contains biomass such as cellulose, hemicellulose, and lignin. The lignin content in mahogany wood can be used as raw material for making sodium lignosulfonate surfactants. Delignification of lignin is carried out alkaline and continued with lignin isolation by acid precipitation. Pure lignin isolate is further used as a raw material for making sodium lignosulfonate surfactants using the sulfonation process. The sulfonation process is carried out by mixing lignin isolate and sodium bisulfite solution using excess NaHSO3 variation and sulfonation time. Both variables are run by adding sodium hydroxide as a catalyst and the pH condition was maintained at pH 4. The sodium lignosulfonate surfactant solution formed was then characterized using FT-IR spectrophotometer and UV-Vis spectrophotometer. The best condition was obtained at a sulfonation time of 150 minutes and NaHSO3 exceeded 75%, namely with a surfactant concentration of   4100,784 mg/L.
Synthesis of Cellulose Nanocrystals from Rice Husk Using Nitric Acid Hydrolysis Fernanda, Moza Ayu; Novianah, Delia Indah; Siswati, Nana Dyah; Pujiastuti, Caecilia
Indonesian Journal of Chemical Research Vol 13 No 2 (2025): Edition for September 2025
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2025.13-moz

Abstract

Rice husk residue has excellent potential as a raw material for making cellulose nanocrystals because of its relatively high cellulose content. This research focuses on determining the most effective hydrolysis conditions, especially the reaction time and nitric acid (HNO₃) content, in the synthesis of cellulose nanocrystals. This study also aims to determine the effect of variations in nitric acid concentration and hydrolysis time on the amount of product produced (yield) and the final size of cellulose nanocrystals. The process of making these nanocrystals involves three main stages, namely the removal of lignin using a 17,5% NaOH solution, followed by annealing using a 10% H₂O₂ solution, and finally breaking the cellulose bonds (acid hydrolysis) with a concentrated nitric acid solution of between 2% and 6% for different time periods (30 to 15 minutes). Product characterization using FT-IR and SEM has been carried out to confirm the presence of cellulose and determine the size of the nanocrystals formed. Experimental results show that the smallest cellulose crystal size achieved is between 0,93 to 65,10 μm, which was obtained through hydrolysis using 6% nitric acid for 150 minutes.
Co-Authors Af'ida, Layyinatul Aisah Andita, Jessica Shierly Ardiantono, Fikri Adji Ariyani, Ayu Eka Putri Dara, Puspa Secylia Dyah Suci Perwitasari, Dyah Suci Eko Nurcahyo Erliyanti, Nove Kartika Fernanda, Moza Ayu Guntoro, Hanif Kurniawan Herwindo Theodorus Junaini . Juni SU Kaffah, Elsyaff Visshilmi Kusuma, Meidina Rafida L.Urip Widodo, Yohandrik Novel Karaman Luluk Edahwati Luluk Edahwati Martini, Nina Masyitoh Febrianti Maulida, Nabilah Novianah, Delia Indah Nurcholis, Fachrul Pratama, Naufaldy Wira Puguh Wahyu Eko S Pujiastuti, Caecilia Putri, Amalia Eka Putri, Lintang Karunia Rifaldi, Kornelius Sani SANI SANI Siltje Rivana Soemargono Soemargono SRIE MULJANI Suprihatin Suprihatin sutiyono sutiyono Wachidah, Aprilia Nur Wardana, Reza Asrulyawan Widyantini, Warry Wiraya, Wira Arta Zuroida Novi A.