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PEMANFAATAN MINYAK BIJI RAMI (LINSEED OIL) DAN GLISEROL BY-PRODUCT BIODIESEL UNTUK PEMBUATAN VERNIS ALAMI Sutanti, Sri; Purnavita, Sari; Sriyana, Herman Yoseph
METANA Vol 9, No 01 (2013): Juli 2013
Publisher : Universitas Diponegoro

Abstract Varnish is coating material that is produced by using polymer. ActuallyÂ natural varnish is produced by manufacturing natural polymer like gondorukem. The research is to study about optimizing ofÂ reactant composition as the ratio of OH/COOH and operation temperature in the process of making natural varnish from gondorukem, linseed oil and glycerol by-product biodiesel using the alcoholysis method. The reaction is done in the reactor using agitator. The reaction consists of two steps, 1). the forming of monoglyceride, 2). the forming of varnish. Both steps of reaction is done at the same temperature (200oC, 220oC, 240oC and 260oC). Reactant ratio is used as equivalent ratio OH/COOH: 1,1; 1,2; and 1,3. We analyze free glycerol concentration in the first step reaction andÂ acid value in the second step reaction. The best result is obtained in ratio 1,2 and operation temperature 260oC. Key word: natural varnish, alcoholysis, equivalent ratio OH/COOH, linseed oil, glycerol by-product biodiesel.

KARAKTERISTIK CAT CLEAR DARI LIMBAH AMPAS AREN Sriyana, Herman Yoseph; Sudrajat, Ronny Windu
Jurnal Inovasi Teknik Kimia Vol 5, No 1 (2020)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v5i1.3398

Limbah ampas aren di daerah Boja Kabupaten Kendal mengandung kadar cellulose 82,03%. Cellulose ini berpotensi untuk dimanfaatkan sebagai bahan baku dalam pembuatan resin cat clear ramah lingkungan. Proses pembuatan cat clear dilakukan dengan tiga tahap yaitu proses delignifikasi, proses nitrasi, dan mixing. Proses reaksi dilakukan dalam reaktor yang dilengkapi dengan pengaduk dan pengukur suhu. Tujuan penelitian ini adalah untuk mendapatkan kondisi optimum perbandingan campuran castor oil : nitrocellulose (0,5:1; 1:1; 1;2; 1:3; 1:4; 1: 5) dan Jumlah Co-Naphtenate : 0,5%; 1%, 1,5%; 2%, 2,5 % untuk mendapatkan cat clear paling baik dilihat dari karakteristik gloss level,drying time dan daya lekat. Hasil aplikasi cat clear pada panel kayu menunjukkan bahawa perbandingan campuran castor oil : nitrocellulose (1:5) dengan tambahan Co-Naftanet 2,5%, memberikan hasil gloss level terbaik 78,5, drying time 32 menit dan .daya lekat 0 (tidak ada yang mengelupas). Kata kunci: Limbah ampas aren, cat clear, gloss level, drying time, daya lekat.

Practice-Based Chemistry Learning with Training on Household Products Manufacturing at SMAN 15 Semarang: Belajar Kimia Berbasis Praktikum dengan Pelatihan Pembuatan Produk Household Di SMAN 15 Semarang Purnavita, Sari; Sutanti, Sri; Sriyana, Herman Yoseph
Mattawang: Jurnal Pengabdian Masyarakat Vol. 1 No. 2 (2020)
Publisher : Yayasan Ahmar Cendekia Indonesia

The world of national education is required to be able to produce superior human resources, so that they are able to face all challenges that arise in the future. Referring to this, chemistry learning methods at the high school level need special attention. This is due to the lack of student interest in learning chemistry, because the learning is often carried out through a one-way process using the theoretical explanation method. This Community Service Program activity was carried out through workshop and training methods with practice-based chemistry learning. The training materials included liquid detergent, dish soap, and floor cleaner. The partner involved in this program was SMAN 15 Semarang. The implementation of this community service activity began with a material giving session, workshop session and training on household products manufacturing, and discussions. The results of the implementation of this community service activity can provide various benefits for the involved partner in the form of increased knowledge and understanding in the field of chemistry and motivation for entrepreneurship. Practice-based community service activities received a positive response from the partner involved in this program, so that this practice-based learning model would be applied in Chemistry learning at SMA N 15 Semarang. Abstrak Dunia pendidikan nasional harus mampu melahirkan Sumber Daya Manusia yang unggul, agar mampu menghadapi tantangan di masa depan. Salah satu metode pembelajaran yang perlu menjadi perhatian adalah pembelajaran kimia di tingkat Sekolah Menengah Atas. Pembelajaran kimia kurang diminati siswa karena pada umumnya hanya dilakukan secara satu arah dengan metode penjelasan teoritis. Kegiatan Program Pengabdian Masyarakat ini dilakukan melalui metode workshop dan pelatihan dengan pembelajaran kimia berbasis praktikum. Materi pelatihan yang diberikan meliputi detergen cair, sabun cuci piring, dan pembersih lantai. Sebagai mitra kegiatan adalah SMAN 15 Semarang Kegiatan pengabdian masyarakat dilakukan mulai dari sesi pemberian materi, sesi workshop dan pelatihan pembuatan produk household, dan diskusi. Dari hasil kegiatan pengabdian pada masyarakat , mitra mendapatkan manfaat berupa bertambahnya ilmu dan pemahaman dalam bidang kimia serta termotivasi untuk melakukan wirausaha. Kegiatan pengabdian masyarakat yang berbasis praktikum mendapat respon positif dari mitra sehingga model pembelajaran berbasis praktikum akan diterapkan dalam pembelajaran Kimia di SMA N 15 Semarang.

SINTESIS PLASTIK BIODEGRADABLE DARI PATI GANYONG DENGAN MODIFIKASI KASEIN SUSU AFKIR DAN PLASTICIZER SORBITOL Sriyana, Herman Yoseph; Prastyawati, Soraya
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 6 No. 2 (2024): JPPL, September 2024
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v6i2.2346

Canna starch has the potential to be a raw material for biodegradable plastic because it has a total starch content of 93.30%, amylose content of 42.40% and amylopectin 50.90%. The research aims to study the effect of the ratio of canna starch and casein rejected milk with sorbitol modification on the characteristics of biodegradable plastic. The variables of this research were the ratio of canna starch and casein from rejected milk (4:0; 3:1; 2:2) and stirring for 30 minutes at 75°C and the addition of sorbitol (2%, 3%, 4% , 5%). The process of making biodegradable plastic is carried out by pouring a biodegradable plastic solution according to variables into a mold, then drying it using an oven at 70°C for 6 hours and the mold is taken out to dry at room temperature for 24 hours. The plastic formed is tested for tensile strength, elongation, biodegradation, morphology. The results of this research show that the higher the canna starch added and the lower the casein added, the more water resistance, tensile strength, elongation increases, and biodegradation increases. The smaller the ratio of canna starch and milk casein (the greater the amount of milk casein), the higher the water resistance, tensile strength, elongation and biodegradability of the resulting bioplastic. The best combination ratio of starch and casein was obtained at a ratio of 4:0 which provided the highest water resistance of 81.82%, the highest tensile strength of 5.48 MPa, the highest elongation of 26.67, and the highest biodegradation of 0.08. The higher the amount of sorbitol added increases the value of elongation, biodegradation. The best addition of sorbitol was obtained at a concentration of 5% which provided the highest elongation of 8.57, biodegradation of 0.11, while the best tensile strength was obtained at a concentration of 1% of 3.40 MPa.

Pengaruh Variasi Jenis Sampah dan Jumlah Larva BSF (Black Soldier Fly) pada Penguraian Sampah Organik Rumah Tangga Firstyaline, Jennycha Ananda Budhi; Oktaviananda, Cyrilla; Sriyana, Herman Yoseph; Rahayu, Lucia Hermawati
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 7 No. 1 (2025): JPPL, Maret 2025
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M), Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v7i1.2641

Bertambahnya jumlah penduduk dan konsumsi rumah tangga mengakibatkan peningkatan volume sampah rumah tangga. Peningkatan volume sampah rumah tangga akan menjadi masalah yang serius jika tidak dilakukan upaya pengolahan. Bertambahnya volume sampah dengan proses pengolahan yang tidak optimal akan mengakibatkan terjadinya penumpukan volume sampah organik di Tempat Pengolahan Sampah Terpadu (TPST). Salah satu upaya yang dapat dilakukan untuk mengolah sampah pada skala rumah tangga adalah dengan cara penguraian menggunakan larva BSF (Black Soldier Fly). Sampah rumah tangga pada umumnya terdiri dari sisa-sisa sayuran dan kulit buah. Sisa sayuran dan buah-buahan termasuk dalam sampah organik yang memiliki banyak kandungan unsur hara. Kandungan unsur hara ini dapat dimanfaatkan oleh larva BSF sebagai sumber makanan untuk perkembangbiakannya. Kemampuan larva BSF dalam memakan sampah organik menjadikan larva BSF sebagai salah satu agen biodekomposter. Penelitian ini bertujuan untuk mengetahui pengaruh jenis sampah dan variasi jumlah maggot terhadap efisiensi konversi pakan, indeks pengurangan limbah dan karakteristik maggot yang dihasilkan. Pada penelitian ini dilakukan dengan metode rancangan acak lengkap dengan dua variabel bebas dan dua kali pengulangan. Karakteristik fisik maggot yang meliputi, efisiensi konversi pakan yang dicerna (ECD/Efficiency of Conversion of Digested Feed) Indeks pengurangan limbah (WRI/Waste Reduction Index), dan kadar protein pada maggot kering. Hasil penelitian dianalisis dengan metode sidik ragam dimana memberikan hasil bahwa jenis sampah tidak berpengaruh terhadap nilai efisiensi konversi pakan (ECD), berpengaruh nyata terhadap nilai indeks pengurangan limbah (WRI) dan berpengaruh sangat nyata terhadap kadar protein.Kata kunci: Larva BSF, Maggot, Sampah Organik

MODIFIKASI PATI KIMPUL (Xanthosoma sagittifolium) DENGAN HIDROLISIS ENZIMATIK Rahayu, Lucia Hermawati; Sriyana, Herman Yoseph; Meliatama, Lafany Rysha
CHEMTAG Journal of Chemical Engineering Vol 4, No 2 (2023): CHEMTAG Journal of Chemical Engineering
Publisher : Universitas 17 Agustus 1945 (UNTAG) Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56444/cjce.v4i2.4439

Kimpul (Xanthosoma sagittifolium) memiliki kandungan pati alami yang tinggi sehingga berpotensi sebagai bahan baku pembuatan pati modifikasi. Pati alami memiliki banyak kelemahan sehingga perlu dilakukan proses modifikasi untuk mengatasi kekurangan dan meningkatkan fungsionalnya. Pada penelitian ini dilakukan modifikasi pati kimpul dengan metode hidrolisis enzimatis menggunakan kecambah kacang hijau sebagai sumber enzim α-amilase. Tujuan penelitian adalah menentukan kondisi terbaik konsentrasi kecambah kacang hijau dan waktu inkubasi berdasarkan analisis parameter uji meliputi yield, daya serap air, dan daya kembang pati kimpul termodifikasi. Proses modifikasi enzimatik dilakukan dengan menginkubasi pati kimpul yang dicampur dengan kecambah kacang hijau pada berbagai konsentrasi (20, 25, 30, dan 35% dari pati yang akan dimodifikasi) pada suhu 30°C selama 1, 2, dan 3 hari. Hasil penelitian menunjukkan bahwa kondisi terbaik diperoleh pada konsentrasi kecambah 35% dan lama inkubasi 2 hari dengan yield 99,2006%, daya serap air 3,58 g/g, dan daya kembang 35,14%.

SINTESIS PLASTIK BIODEGRADABLE DARI PATI GANYONG DENGAN MODIFIKASI KASEIN SUSU AFKIR DAN PLASTICIZER SORBITOL Sriyana, Herman Yoseph; Prastyawati, Soraya
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 6 No. 2 (2024): JPPL, September 2024
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M), Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v6i2.2346

Canna starch has the potential to be a raw material for biodegradable plastic because it has a total starch content of 93.30%, amylose content of 42.40% and amylopectin 50.90%. The research aims to study the effect of the ratio of canna starch and casein rejected milk with sorbitol modification on the characteristics of biodegradable plastic. The variables of this research were the ratio of canna starch and casein from rejected milk (4:0; 3:1; 2:2) and stirring for 30 minutes at 75Â°C and the addition of sorbitol (2%, 3%, 4% , 5%). The process of making biodegradable plastic is carried out by pouring a biodegradable plastic solution according to variables into a mold, then drying it using an oven at 70Â°C for 6 hours and the mold is taken out to dry at room temperature for 24 hours. The plastic formed is tested for tensile strength, elongation, biodegradation, morphology. The results of this research show that the higher the canna starch added and the lower the casein added, the more water resistance, tensile strength, elongation increases, and biodegradation increases. The smaller the ratio of canna starch and milk casein (the greater the amount of milk casein), the higher the water resistance, tensile strength, elongation and biodegradability of the resulting bioplastic. The best combination ratio of starch and casein was obtained at a ratio of 4:0 which provided the highest water resistance of 81.82%, the highest tensile strength of 5.48 MPa, the highest elongation of 26.67, and the highest biodegradation of 0.08. The higher the amount of sorbitol added increases the value of elongation, biodegradation. The best addition of sorbitol was obtained at a concentration of 5% which provided the highest elongation of 8.57, biodegradation of 0.11, while the best tensile strength was obtained at a concentration of 1% of 3.40 MPa.

Pengaruh Variasi Jenis Sampah dan Jumlah Larva BSF (Black Soldier Fly) pada Penguraian Sampah Organik Rumah Tangga Firstyaline, Jennycha Ananda Budhi; Sriyana, Herman Yoseph; Rahayu, Lucia Hermawati; Oktaviananda, Cyrilla
Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Vol. 7 No. 1 (2025): JPPL, Maret 2025
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M), Politeknik Negeri Cilacap

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35970/jppl.v7i1.2641

The increase in population and household consumption can lead to an increase in the volume of household waste. The increase in the volume of household waste will become a serious problem if no processing efforts are made. If household-scale waste processing is not carried out, it can result in the accumulation of the volume of organic waste in the Integrated Waste Management Site (TPST). One of the efforts that can be made to process waste at the household scale is by decomposing it using BSF larvae (maggot). Household waste generally consists of vegetable scraps and fruit peels. Vegetable and fruit waste is classified as organic waste which contains many nutrients that are utilized by BSF larvae as a food source in their breeding. The ability of BSF larvae to eat organic waste makes them widely used as one of the biodecomposter agents. This study aims to determine the effect of waste type and variation in the number of maggot on feed conversion efficiency, waste reduction index and characteristics of maggot produced. This study was conducted with a complete randomized design method with two independent variables and two repetitions. The physical characteristics of maggot which include, digested feed conversion efficiency (ECD), waste reduction index (WRI), and protein content in dried maggot. The type of garbage has no significant effect on the value of feed conversion efficiency (ECD), has a significant effect on the value of the waste reduction index (WRI) and has a very significant effect on protein content. The variation in the number of maggot has a very significant effect on the value of feed conversion efficiency (ECD) and waste reduction index (WRI) and has a significant effect on protein content.

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