Articles

PEMILIHAN DOSEN BERPRESTASI DENGAN METODE TOPSIS Indriyati, Indriyati
JURNAL MASYARAKAT INFORMATIKA Vol 1, No 2 (2010): Jurnal Masyarakat Informatika
Publisher : Jurusan Ilmu Komputer/Informatika UNDIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.14710/jmasif.1.2.19-24

Abstract

Banyak metode yang digunakan dalam pengambilan keputusan. Salah satu metode yang dapat digunakan untuk menyelesaikan masalah Multi Attribute Decision Making (MADM) adalah dengan metode TOPSIS. Metode TOPSIS mudah dipahami, komputasinya efisien, dan memiliki kemampuan mengukur kinerja relatif dari alternatif-alternatif keputusan dalam bentuk matematis yang sederhana. Konsep metode TOPSIS adalah pemilihan alternatif terbaik tidak hanya memiliki jarak terpendek dari solusi ideal positif, tetapi juga memiliki jarak terpanjang dari solusi ideal negatif. Dalam menentukan prioritas dosen berprestasi sering muncul subyektifitas dari para pengambil keputusan. Untuk menghindari hal tersebut, penentuan dosen berprestasi dapat dilakukan dengan menggunakan metode TOPSIS, yang dapat menentukan prioritas dosen yang layak untuk mendapatkan penghargaan sesuai dengan kriteria yang ditetapkan oleh pengambil keputusan.
SISTEM INFORMASI TUGAS AKHIR & PRAKTEK KERJA LAPANGAN BERBASIS WEB MENGGUNAKAN METODE UNIFIED PROCESS Adiwinata, Ryan; Sarwoko, Eko Adi; Indriyati, Indriyati
JURNAL MASYARAKAT INFORMATIKA Vol 2, No 3 (2011): Jurnal Masyarakat Informatika
Publisher : Jurusan Ilmu Komputer/Informatika UNDIP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.293 KB) | DOI: 10.14710/jmasif.2.3.51-62

Abstract

Final project and job training are the compulsory subject that is organized by Informatics Department Diponegoro University. All registration process, recapitulation and administration about those subjects still have done manually. Moreover, the students and lecturers of informatics departement has not been able to access the latest informations and journals quickly and easily. The Final Project and Job Training Information System is built to solve those problems. This information system was developed using unified process method. Unified process is one of object-oriented software development process which consist of five workflows, requirement, analysis, design, implementation, and test. This information system runs on a web platform using PHP 5 scripting language and MYSQL 5 as database management system that can be accessed anytime and anywhere.The Final Project and Job Training Information System can be used as data, information and administration center about the final project and job training course.
PROSES PEMBENIHAN (SEEDING) DAN AKLIMATISASI PADA REAKTOR TIPE FIXED BED Indriyati, Indriyati
Jurnal Teknologi Lingkungan Vol 4, No 2 (2003): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB) | DOI: 10.29122/jtl.v4i2.279

Abstract

Proses pembenihan (seeding) dan aklimatisasi menggunakan reactor lekatdiam terendam menggunakan media cincin keramik yang menggunakansubstrat limbah cair pabrik permen, memperlihatkan aktivitas bekteri semakinstabil pada hari ke 91 sampai hari ke 99. hal tersebut dapat dilihat daripenyisihan COD sebesar 82 – 86 % konsentrasi gas metan berkisar antara 62 –69 %, rentang pH 6,8 – 7,23 dan bakteri sudah melekat.
PENGOLAHAN LIMBAH CAIR ORGANIK SECARA BIOLOGI MENGGUNAKAN REAKTOR ANAEROBIK LEKAT DIAM Indriyati, Indriyati
JURNAL AIR INDONESIA Vol 1, No 3 (2005): JURNAL AIR INDONESIA
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

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Abstract

Organic waste water can be treated biolocally by using anaerobic fixed bed reactor. Fixed bed reactor is bioreactor which is compleeted with support material inside reactor for bacteria fixation in the surface area of support material. The benefit of using this kind of technology are it needs low energy, low nutrien, low sludge production and could treat high organic concentraion waste water. The support material has important role in the Fixed Bed reactor performance, therefore it must be mentioned in several factors those are : size & shape of suport material, ratio of surface area and volume which influences the attach of microorganism, porousity is a waste water volume compare to the total volume and material of support material must    inert.    According to the benefit and the principle of Fixed Bed reactor, this kind of technology    can be used to treat the organic high concentration to reduce the organic pollutant.
DEGRADASI BAHAN ORGANIK LIMBAH CAIR INDUSTRI PERMEN DENGAN VARIASI WAKTU TINGGAL Indriyati, Indriyati
JURNAL TEKNOLOGI LINGKUNGAN Vol 3, No 1 (2002): JURNAL TEKNIK LINGKUNGAN
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

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Abstract

Limbah cair yang dihasilkan PT. Van Melle Indonesia (PTVMI), mengundangbahan organik tinggi dengan konsentrasi COD berkisar antara 10.000 – 30.000 mg/L. kandungan bahan organik yang tinggi dapat menimbulkan gangguan bagi perairan, sehingga perlu didegradasi salah satu alternatif teknologi pengolahan limbah yaitu menggunakan reaktor anaerobik lekat diatas terendam. Jenis reaktor ini adalah bioreaktor yang dilengkapi dengan bahan penyangga sebagai tempat massa mikroorganisme tumbuh dan berkembang biak.Penelitian ini dilakukan untuk melihat degradasi bahan organik limbah cair industri permen dengan variasi waktu tinggal 18, 14, 12 dan 10 hari yang dioperasikan secara kontinyu. Hasil degradasi bahan organik dengan variasi waktu tinggal terbaik di dapat pada waktu tinggal 12 hari dengan degradasi bahan organik terlarut sebesar 98,07%, pH efluen 6,90, produksi harian biogas 5 L/hari, produksi gas metan 3,25 L/hari dan kandungan gas metan 65%. Plastik yang digunakan sebagai media cukup efektif sebagai tempat menempelnya bakteri dengan porositas 87,30% dan luas permukaan efektif sebesar 514,40 M2/M3.
PROSES PEMBENIHAN (SEEDING) DAN AKLIMATISASI PADA REAKTOR TIPE FIXED BED Indriyati, Indriyati
JURNAL TEKNOLOGI LINGKUNGAN Vol 4, No 2 (2003): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (0.036 KB)

Abstract

Proses pembenihan (seeding) dan aklimatisasi menggunakan reactor lekatdiam terendam menggunakan media cincin keramik yang menggunakansubstrat limbah cair pabrik permen, memperlihatkan aktivitas bekteri semakinstabil pada hari ke 91 sampai hari ke 99. hal tersebut dapat dilihat daripenyisihan COD sebesar 82 – 86 % konsentrasi gas metan berkisar antara 62 –69 %, rentang pH 6,8 – 7,23 dan bakteri sudah melekat.
PENGARUH WAKTU TINGGAL TERHADAP PERPANDING BOD DAN COD SERTA PEMBENTUKAN GAS METAN (CH4) Indriyati, Indriyati
JURNAL TEKNOLOGI LINGKUNGAN Vol 5, No 1 (2004): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

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Abstract

Generally, food wastewater contains high organic matter, therefore the exact wastewater treatment is biological process by using Fixed Bed reactor in anaerobic system. In this observation , showed the comparison between BOD and COD, mass balance and the forming of methane gas (CH4) with variation of hydraulic retention time 11 days, 7 days, 5 days and 3 days. Based on the observation result, the 11 days hydraulic retention time is the most efficient of reactor performance and the best forming of methane gas (CH4) is the 7 days of hydraulic retention.
UNJUK KERJA REAKTOR ANAEROB LEKAT DIAM TERENDAM DENGAN MEDIA PENYANGGA POTONGAN BAMBU Indriyati, Indriyati
JURNAL TEKNOLOGI LINGKUNGAN Vol 8, No 3 (2007): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

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Abstract

Fixed Bed Anaerobic reactor that use support material from bamboo ings can be used as waste water biological treatment without oxygen inside reactor. On the experiment that use soybean sauce waste waterwith high organic content.According to the experiment, the optimum performance result was 3.5 days withloading rate 0.71 kg COD/m3.day and bamboo rengs can be used as supportmaterial.
PENGOLAHAN LIMBAH CAIR INDUSTRI MINUMAN Indriyati, Indriyati
JURNAL TEKNOLOGI LINGKUNGAN Vol 9, No 1 (2008): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

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Abstract

The organic concentration of soft drink factory waste water has not high organic concentration, therefore one of the alternatives of the treatment technology is using aerobic system : activated sludge. On this observation can be seen that the system can be used as waste water treatment for soft drink that is not so high in COD contain and the criteria parameters design can be fulfilled by process parameters during operation the system. The parameters that are not fulfill the design parameters is caused by the shock loading of toxic material or by the high loading rate of substrate of waste water. Based on parameter criteria as mention above, the efficiency that can be reached of this process is about 61,22%.
PENGOLAHAN LIMBAH CAIR INDUSTRI MINUMAN RINGAN Indriyati, Indriyati
JURNAL TEKNOLOGI LINGKUNGAN Vol 10, No 1 (2009): JURNAL TEKNOLOGI LINGKUNGAN
Publisher : Badan Pengkajian dan Penerapan Teknologi (BPPT)

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Abstract

The concentration of soft drink contains organic waste water not so high. There fore one of the alternative of processing technology is used aerobic system: Oxydation ditch. On this observation can be seen that the system is able to degrade the organic matter by observe the operation parameters process to operate the system and the parameters are BOD, COD, TSS, Oil & grease, TDS, Total N and pH. All parameters show stability process during 3 (three) months operation. Base on the criteria as mentioned above, the efficiency that can be reached by this system are around 96,875 % for BOD efficiency, COD 96 % for COD efficiency , TSS 80 %, Oil & grease 75 %, Total N 76,92 % and pH 41 %.