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Techno (Jurnal Fakultas Teknik, Universitas Muhammadiyah Purwokerto)
Published by Universitas Muhammadiyah Purwokerto
ISSN : 14108607     EISSN : 25799096     DOI : -
Core Subject : Engineering,
Engineering
Arjuna Subject : -
Articles 72 Documents
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HEAVY METALS ADSORPTION BY XANTHATE OF FOOD PROCESSING WASTE Hartati, Indah
Techno Jurnal Ilmu Teknik Vol 12, No 2 (2011): Jurnal Techno Oktober 2011
Publisher : UMP

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Abstract

Industrial effluent loaded with heavy metals are a cause of hazard to human and other forms of life. Conventional methods such as precipitation, evaporation, electroplating, ion exchange, membrane process used for removal of heavy metals from waste water however, are often cost prohibitive having inadequate efficiencies at low metal ion concentrations. Adsorption technology has become one of the alternative treatments. It is observed that appropriated modification of the raw adsorbents especially xanthates can eliminate the drawbacks of adsorbent and improve their performances significantly. Xanthates are most prominent because they are highly insoluble, easy to prepare with relatively inexpensive reagents and have high stability constant values of the metal complexes formed. Xanthates are formed by reacting an organic hydroxyl containing substrate with carbon disulfide under caustic condition. One of organic hydroxyl-containing substrate that can be used for xanthation is food processing waste. The major factors affect the biosorption process are: contact time, initial metal ion concentration, temperature, pH & biomass concentration in solution. It is postulated that metal ion adsorption process could undergo a complex formation. Most of heavy metal adsorption into the xanthate compound followed Langmuir adsorption isotherm model, and well described by the pseudo-second- order equation.  Key-word : Adsorption, Xanthate, Heavy metal
STRATEGI PENGELOLAAN SEDIMENTASI WADUK Marhendi, Teguh
Techno Jurnal Ilmu Teknik Vol 14, No 2 (2013): Jurnal Techno Oktober 2013
Publisher : UMP

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Waduk-waduk di Indonesia hampir tidak lepas dari masalah sedimentasi.  Problem sedimentasi menjadi agenda penting yang selalu mengganggu operasional waduk, termasuk mempengaruhi terhadap umur fungsi waduk itu sendiri. Erosi lahan yang tinggi di daerah hulu waduk (Daerah Tangkapan Waduk) menjadi sumber utama penyebab tingginya sedimentasi waduk. Hal ini secara umum didorong oleh perubahan tutupan lahan atau adanya pemanfaatan lahan yang kurang memperhatikan kaidah konservasi di DTA waduk.Tulisan ini dimaksudkan untuk membahas beberapa strategi dalam mengelola sedimentasi waduk baik secara teknis maupun non teknis yang dapat mengurangi peningkatan sedimentasi waduk. Penanganan sedimentasi waduk secara umum dapat dibedakan menjadi empat jenis kegiatan atau usaha, yaitu: menekan laju erosi kawasan hulu, meminimalkan beban sedimen yang masuk ke waduk, meminimalkan jumlah sedimen yang mengendap di waduk dan mengeluarkan endapan sedimen di waduk. Disamping itu dapat juga ditempuh melalui penanganan secara vegetatif dan sosial dimana masyarakat dilibatkan dalam pengelolaan sedimentasi waduk.Kata Kunci: Sedimentasi waduk, Pengelolaan, erosi lahan
SISTEM PENDUKUNG KEPUTUSAN KELOMPOK UNTUK MENENTUKAN DOSEN BERPRESTASI MENGUNAKAN METODE SIMPLE ADDITIVE WEIGHTING (SAW) DAN COPELAND SCORE (STUDI KASUS: UNIVERSITAS MUHAMMADIYAH PURWOKERTO) Sari, Dhani Ratna; Utami, Ema; Lutfi, Emha Taufiq
Techno Jurnal Ilmu Teknik Vol 15, No 1 (2014): Jurnal Techno April 2014
Publisher : UMP

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Abstract

Penelitian ini bertujuan untuk mengkaji penerapan Sistem Pendukung Keputusan Kelompok (SPKK) untuk menentukan dosen berprestasi di Universitas Muhammadiyah Purwokerto (UMP). Kelompok pengambil keputusan yang terlibat adalah Lembaga Pengkajian dan Pengamalan Al-Islam dan Kemuhammadiyahan (LPPI), Lembaga Penjaminan Mutu (LPM) dan Tim Penilai Angka Kredit (TPAK). Tiap kelompok pengambil keputusan manilai kriteria yang berbeda dan menentukan keputusan alternatifnya masing-masing. Pengambilan keputusan individu menggunakan metode Simple Additive Weighting(SAW) dan agregasi keputusan kelompok menggunakan metode Copeland Score. Hasil penelitian menunjukkan bahwa metode SAW mampu menyeleksi alternatif terbaik dari beberapa alternatif. Data hasil penelitian juga membuktikan bahwa metode Copeland Score dapat digunakan untuk menyatukan hasil keputusan individu dari masing-masing pengambil keputusan.Kata kunci: Sistem pendukung keputusan kelompok, SAW, Copeland Score
TEKNOLOGI PENGENDALIAN EROSI LAHAN Marhendi, Teguh
Techno Jurnal Ilmu Teknik Vol 15, No 1 (2014): Jurnal Techno April 2014
Publisher : UMP

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Abstract

Permasalahan erosi lahan dan sedimentasi waduk akan berdampak pada umur fungsi  waduk. Beberapa waduk umumnya mengalami problem operasional sebagai akibat pengurangan kapasitas waduk. Waduk Sempor, Wadaslintang, Kedung Ombo, Mrica dan beberapa waduk lain mengalami permasalahan sedimentasi. Tulisan ini mencoba mengulas upaya mengurangi erosi dan sedimentasi melalui beberapa upaya pengendalian erosi lahan. Pengendalian erosi dimaksudkan sebagai upaya pencegahan kerusakan tanah dengan cara mengupayakan resistansi tanah terhadap daya erosi dan mengurangi sifat erosif dari aliran permukaan (surface runoff).Usaha pengendalian erosi dan/atau usaha pengawetan tanah dapat dilaksanakan dengan teknologi atau beberapa cara seperti cara vegetatif, cara mekanik, cara gabungan vegetatif dan mekanis serta cara kimiawi. Pada Tulisan ini akan dijelaskan cara vegetatif dan cara teknis atau mekanis.Kata kunci: Erosi lahan, Pengendalian erosi, vegetatif, mekanik
PROTOTIPE GENERATOR MAGNET PERMANEN AXIAL AC 1 FASA PUTARAN RENDAH SEBAGAI KOMPONEN PEMBANGKIT LISTRIK TENAGA PIKO HIDRO Prasetijo, Hari; Walujo, Sugeng
Techno Jurnal Ilmu Teknik Vol 15, No 2 (2014): Jurnal Techno Volume 15 No.2 Oktober 2014
Publisher : UMP

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Pada penelitian ini dirancang sebuah prototipe generator magnet permanen aksial AC 1 fasa. Generator magnet permanen dipilih karena tidak memerlukan arus eksitasi DC serta sistem pemeliharaan yang relatif mudah. Jenis magnet permanen yang digunakan adalah NdFeb (Neodymium-Iron-Boron). Generator yang dirancang bertipe double sided coreless stator. Hasil pengujian diperoleh tegangan rms sebesar 12,13 volt dengan frekuensi 50,2 Hz pada pengujian tanpa beban dan 11,93 volt dengan frekuensi 50,1 Hz pada pengujian berbeban. Beban yang digunakan yaitu 3 buah lampu pijar 24 volt 125 mA terhubung paralel. Kata kunci : PLTPH, Generator, aksial, 1 fasa dan NdFeb
PERANCANGAN SISTEM PERINGATAN DINI KEBOCORAN GAS AMMONIA PADA INDUSTRI KULIT BERBASIS GSM GATEWAY Parwati, Cyrilla Indri; Suseno, Hadi Prasetyo; Iswahyudi, Catur
Techno Jurnal Ilmu Teknik Vol 16, No 1 (2015): Jurnal Techno Volume 16 No.1 April 2015
Publisher : UMP

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Bahaya gas beracun ammonia merupakan bahaya terbesar dari aktivitas proses produksi yang menggunakan bahan kimia terutama pada industri kulit, maka untuk memantau kemungkinan munculnya gas beracun ammonia diperlukan suatu sistem telemetri pengukuran konsentrasi gas di sekitar daerah yang disinyalir berbahaya mengeluarkan gas beracun ammonia. Kelebihan dari sistem ini adalah data-data hasil pemantauan dapat diketahui kapanpun dan dimanapun melalui SMS, sehingga dapat memberikan peringatan dini adanya bahaya gas beracun bagi masyarakat di daerah tersebut. Tujuan dari penelitian ini untuk merancang bangun sistem peringatan dini gejala gas beracun ammonia pada industri kulit berbasis teknologi komunikasi GSM secara realtime, sehingga permasalahan-permasalahan yang ada di daerah berbahaya tersebut dapat teratasi. Pada prototipe ini terdapat tiga kondisi keadaan dalam mendeteksi adanya kadar gas ammonia di udara, yaitu SIAGA, WASPADA, dan AWAS dimana ketiga keadaan tersebut memiliki batas ambang bawah yang berbeda-beda, nilai ambang batas bawah masing-masing kondisi tersebut antara lain SIAGA=100ppm, WASPADA=150ppm, dan AWAS=200ppm. Berdasarkan hasil pengujian didapatkan alat bekerja dengan baik dengan waktu respon rata-rata SMS sekitar 5 detik tergantung kualitas sinyal dan trafic data dari suatu provider oleh pengguna, dan pembacaan tingkat kewaspadaan dapat dideteksi sesuai yang diharapkan.Kata kunci: Gas Ammonia, Mikrokontroler AVR, SMS Gateway
MODEL GR4J (Ge’nie Rural a’ 4 Parame’tres Journalier) UNTUK MENDUKUNG ANALISIS KETERSEDIAAN AIR DI DAS TAJUM Santoso, Purwanto Bekti
Techno Jurnal Ilmu Teknik Vol 13, No 1 (2012): Jurnal Techno April 2012
Publisher : UMP

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This study aims to apply the GR4J model as rainfall-runoff modeling in Tajum watershed to get four free parameters obtained from daily rainfall data. In this study, input data is in the form of daily rainfall data and potential evapotranspiration data. The output of calculated discharged is calibrated using observations of daily discharge data. This modeling optimizes four free parameters of the Maximum Capacity of Production Store (X 1), Groundwater Coefficient (X 2), Maximum Capacity of Routing Store (X 3), and Peak Time of Ordinate Unit Hydrograph (X 4).  The optimum values of the modeling parameters of GR4J are obtained from the criterion of the smallest discrepancies between calculated and observed data, which are Nash-Sutcliffe Coefficient (NS), the correlation coefficient values and methods of Relative Volume Error (RVE). There are three stages in this modeling, namely: model calibration, model verification and model validation. Model calibration is carried out by using the first five years of data and verification of models uses the second five years of data. Comparisons of GR4J with other two rainfall-runoff models, Mock and SAC-SMA Models, were also carried. Results of this study indicate that GR4J model shows better performance than the Mock models and SAC-SMA models in terms of the criterion evaluated. Keywords: Tajum watershed, water availability, rainfall-runoff, GR4J models
PENGATURAN KECEPATAN KIPAS ANGIN DENGAN TEKNOLOGI INVERTER Tamam, Muhammad Taufiq; taufiq, Arif Johar
Techno Jurnal Ilmu Teknik Vol 13, No 1 (2012): Jurnal Techno April 2012
Publisher : UMP

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This study aims to create a tool, that is inverter which can be used to adjust the fan rotation speed. The research was carried out using variable astable multivibrator circuit as a switching circuit on the inverter.After testing, the magnitude of the fan rotation speed depending on the size of the resulting frequency of astable multivibrator. Key word:  inverter, astable multivibrator,  fan.
SOLUSI SUMBER PEMBIAYAAN JALAN DI ERA OTONOMI DAERAH Nuriyanis, Akhmad
Techno Jurnal Ilmu Teknik Vol 11, No 2 (2010): Jurnal Techno Oktober 2010
Publisher : UMP

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The Indonesian nation began to promote the reform era of regional autonomy, contribute significantly to the local independence, on the other hand the level of investment in road infrastructure in Indonesia in general tend to be less adequate. These conditions have an impact on decreasing the level of system efficiency and effectiveness of planning, implementation and maintenance of existing infrastructure, with consequent emergence of an urgent need to establish the accuracy of the policy directions that can ensure the availability of financing road maintenance is continuous.Concept of in developed countries by way of charge on road users directly as a function of fixed costs and variable costs of road class, management and maintenance, and can provide enough income for the implementation of the road program, by providing an institutional device whereby certain income streams can be channeled to public sector units which can be used without going through the procedures and review of the general budget. Source of income consists of the fuel tax, vehicle tax, vehicle weight, fines for overloading. As an illustration of current conditions, road maintenance costs resulting from fuel tax revenues to cover ± only 25% of the total maintenance funding requirements, while in another country fuel tax revenues reached ± 90%. Key Words: Financing Road, Autonomy, Road Revenue,.
PERFORMANSI VIDEO STREAMING PADA JARINGAN LTE (LONG TERM EVOLUTION) MENGGUNAKAN MODE DUPLEX TDD (TIME DIVISION DUPLEX Wulandari, Asri; Purnomowati, endah Budi; Alfanadiyah, Rizki
Techno Jurnal Ilmu Teknik Vol 12, No 2 (2011): Jurnal Techno Oktober 2011
Publisher : UMP

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Video streaming is a technology play video files directly without having to download it. LTE (Long Term Evolution) is a mobile telecommunications technology as the evolution of HSDPA technology. LTE has the ability to transmit data at high speed. LTE network technology used in duplex mode FDD (Frequency Division Duplex) and TDD (Time Division Duplex). This study aims to determine the performance of video streaming on LTE network by using a TDD. The performance is analyzed include delay, packet loss, and throughput. The simulation results prove that the distance between UE and eNodeB with utilization factors influence the end-to-end delay, packet loss, and throughput in streaming video transmission. On the same data packet length, the greater the distance between the eNodeB with the EU, the greater the value of end-to-end delay. While the throughput of the smallest is 352 200 kbps which occurs when the distance between the eNodeB and UE is 10000 m with a utilization factor of 0.9.  Key-word : Video Streaming, LTE, TDD, jarak eNodeB ke UE, faktor utilisasi, delay end to end, packet loss, throughput

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