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All Journal JURNAL TEKNOLOGI KIMIA DAN INDUSTRI
Danny Soetrisnanto
Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro Jln. Prof. Soedarto, Tembalang, Semarang, 50239, Telp/Fax: (024)7460058
Chemical Engineering, Chemistry & Bioengineering Chemistry Engineering Industrial & Manufacturing Engineering

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POTENSI AIR DADIH (WHEY) TAHU SEBAGAI NUTRIEN DALAM KULTIVASI Chlorella sp. UNTUK BAHAN BAKU PEMBUATAN BIODISEL Dhika Joko Arinto; Hayu Pradipta Paramastri; Danny Soetrisnanto
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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An increase of population growth and energy demand has lead to a foster fuel consumption, therefore an alternative fuel is necessarily needed for a solution to solve the problem. Currently, one of the most popular solution offered is biodiesel. The development of biodiesel as renewable energy is done by using microalgae such as Chlorella sp. with 28-32% lipid content as its raw material. The objective of this research is to find out the effect of various concentration, biomass based on growth time, and lipid content based on growth time result by comparing it to the addition of synthetic nutrients and whey (5%, 10%, 15%, 20%, and 25% Total Volume). The optimal growth on cultivation of Chlorella sp. with the addition of synthetic nutrients occurs in day 9 with 0,487 Optical Density (OD), 2,0818 grams/litre of dry biomass, and 0,493 grams/liter of lipid. While for Chlorella sp. cultivation with the addition of tofu waste water (whey) has its optimum condition for Optical Dansity occurs in day 9 of 20%V whey addition which is 0,486. Also observed in day 9, the optimum condition for dry biomass and lipid of 25%V whey addition is 4,2125 grams/litre and 1,081 grams/litre. Chlorella sp. cultivation using 25%V whey addition produced better result comparing to cultivation by using synthetic nutrient.The maximum COD reduction occurs in 15%V whey addition with 77,01% reduction efficiency, while on the other hand, with the addition of whey in its optimum variable (25%V) resulting a decrease of efficiency by 64,28%. Based on tofu industrial center located in Jomblang, with 7 quintals per day of soybean as raw material, it can produce lipid for biodiesel feedstock amounted up to 0,188 kg per day.
KULTIVASI Botryococcus Braunii MEMANFAATKAN AIR DADIH (WHEY) TAHU SEBAGAI POTENSI BIODIESEL Tirna Adhika Rahmat; Rosa Delima Dias W.S.; Danny Soetrisnanto
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Production of biodiesel comes from trans-esterification reaction of fatty acid which produces methyl ester. Vegetables, animals and microalgae can be used for fatty acid sources by their oil, but microalgae have a more beneficial prospect compared to vegetables and animals. Microalgae have fast grow-rate, high oil productivity, low production cost and not having a competition with food industries. Among microalgae, Botryococcus braunii is the one with high oil quantity inside their cells (25 – 75 %). The wastewater of tofu industries is liquid residual from soybean processing becomes tofu which having a nuisance for the environment. This wastewater, usually called whey, is still containing organic materials such as water (99,34 %), protein (1,73 %), fat (0,63 %), nitrogen content (0,05%) and ash (0,11 %) and COD. Organic materials have effect to stimulate microalgae’s growing. Objectives of this experiment are the influence of tofu whey addition at different concentrations toward biomass and lipid produced. This experiment provided the result which optimal cultivation of Botryococcus braunii reaches when using 10% concentration tofu whey with optimal optical density (OD) at day 9 (0,802), 2,4101 gram/litre of gained biomass and 0,8716 gram/litre of lipid production.,better than cultivation of Botryoccus braunii using syntetic nutrient. Maximum COD reduction was gained at 15% tofu whey addition with 88,51% efficiency. COD reduction at optimal tofu whey addition (10%) is 83,33%.
PENGOLAHAN EFLUEN POND FAKULTATIF ANAEROBIK IPAL INDUSTRI KELAPA SAWIT SECARA FAKULTATIF ANAEROBIK-FITOREMEDIASI SEBAGAI PRE-TREATMENT MEDIA TUMBUH ALGAE Reni Krismawati; Rizky Ahdia; Danny Soetrisnanto
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 2, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Peningkatan permintaan pasar terhadap Crude Palm Oil (CPO) mendorong tumbuhnya industri minyak kelapa sawit. Saat ini diperkirakan jumlah limbah cair industri kelapa sawit yang dihasilkan mencapai 28,7 juta ton. Limbah ini merupakan sumber pencemaran, akan tetapi berpeluang untuk digunakan sebagai sumber nutrien bagi pertumbuhan alga. Pengolahan limbah cair minyak kelapa sawit menggunakan pond fakultatif anaerobik hanya mampu menurunkan kadar COD hingga 500-750 ppm, sementara alga mensyaratkan kualitas air yang baik dengan kandungan COD kurang dari 150 ppm. Untuk itu perlu dikembangkan metode pengolahan air limbah lanjutan dengan metode fakultatif anaerobik-fitoremediasi Tanaman Apu-apu. Tujuan penelitian ini adalah untuk mengetahui besarnya penurunan COD, Nitrogen dan Phospor pada beragam waktu tinggal dan mengetahui pengaruh rasio volume lumpur anaerob terhadap penurunan COD, Nitrogen, dan Phospor. Penelitian ini terdiri dari tiga tahapan yaitu tahap persiapan bahan berupa efluen pond fakultatif anaerobic Limbah industri kelapa sawit, tahap pemrosesan, dan tahap analisis. Rancangan percobaan yaitu variasi waktu tinggal 2, 3, 4, 5, dan 6 hari dan prosentase volum lumpur anaerob dalam reaktor sebesar 35%, 50%, dan 65%. Metode fakultatif anaerobik-fitoremediasi ini mampu menurunkan kandungan COD sebesar 39.1%-59.66%, menyerap kandungan Nitrogen sebesar 17.73%-30.78%, dan menyerap kandungan Phospor 6.14%-18.46%. Apu-apu sebagai tanaman fitoremediasi memberikan hasil yangkurang maksimal karena terjadi perusakan akar oleh organisme aerob dalam air limbah.
REKRISTALISASI GARAM RAKYAT DARI DAERAH DEMAK UNTUK MENCAPAI SNI GARAM INDUSTRI Agustina Leokristi Rositawati; Citra Metasari Taslim; Danny Soetrisnanto
JURNAL TEKNOLOGI KIMIA DAN INDUSTRI Volume 2, Nomor 4, Tahun 2013
Publisher : Jurusan Teknik Kimia, Fakultas Teknik, Universitas Diponegoro,

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Abstract

Salt as we known can be defined as chemicals compound which the main part is Sodium Chloride (NaCl) with impurity substances consist of CaSO4, MgSO4, MgCl2, and others. But to get good quality salt from the raw salt can’t be obtained only by washing raw salt. This is caused by the fact that impurities not just only on the surface of crystals salt but also in the crystal lattice salt, so that needs to be purified by recrystallization. This research will use local raw salt 2nd quality from Demak. In this research will be limited in efforts to increase the quality of salt to fullest the Indonesian National Standard (SNI 06-0303-1989) by recrystallization method. Weight of raw salt used as fixed variable. Non-preparation and preparation (addition of Na2CO3, NaOH, and PAC) and crystallization time (1, 1.5, 2 and 2.5 hours) used as change variables. Impurity content and NaCl concentration was calculated before and after crystallization treatment. Concentration of Ca, Mg and Na ions was determined using AAS. Best recrystallization results of NaCl salt concentration is obtained at crystallization with preparation in 1.5 hours, concentration 393,044.234 ppm (99.969%), which complied to SNI 06-0303-1989 (98.5% db).
Co-Authors Agustina Leokristi Rositawati Citra Metasari Taslim Dhika Joko Arinto Hayu Pradipta Paramastri Reni Krismawati Rizky Ahdia Rosa Delima Dias W.S. Tirna Adhika Rahmat