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Joni Hermana
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Chemical Engineering, Chemistry & Bioengineering Engineering Environmental Science

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PEMANFAATAN LIMBAH PADAT PABRIK TAHU SEBAGAI PAKAN KONSENTRAT TERNAK DENGAN PROSES FERMENTASI Joni Hermana
Purifikasi Vol 5 No 2 (2004): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (214.794 KB) | DOI: 10.12962/j25983806.v5.i2.308

Abstract

This research was aimed to determine fermentation influence to soya nutrition. The variations in this research were fermentation period (1 day, 2 days, 3 days, 4 days, 5 days and 6 days) and bio-N concentration (10 ml/2 kg soya waste, 20 ml/2kg tofu waste and 30 ml/2 kg tofu waste). The nutrition which examined with proksimat analysis were rough protein, rough fibre, extract non nitrogen (BETN), rough fat. The result showed that the optimum period of fermentation was 4 days and the effective bio-N concentration was 20 ml/2 kg tofu waste. The rough protein increased to 26,07%, and rough fat increased to 17,35%.
EVALUASI IPAL RUMAH POTONG HEWAN DALAM RANGKA SENTRALISASI PEMOTONGAN HEWAN DI KOTA PONTIANAK Joni Hermana
Purifikasi Vol 4 No 3 (2003): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (282.016 KB) | DOI: 10.12962/j25983806.v4.i3.330

Abstract

The purpose of this research was to evaluate the unit of slaughterhouse treatment plant and find the basic problems, which caused it couldn’t work as properly. Then designed a strategy to attract the operator of illegal slaughterhouses to do the activity at the legal slaughterhouse. The result showed that there were several strategies that could be implemented on this case and divided into two major strategies, which were technical strategy and the non technical strategy with depend on its urgency which were long term strategy, middle term strategy and short term strategy.
SIMULASI SEBARAN TUMPAHAN MINYAK DI PERAIRAN DUMAI, PT CALTEX PACIFIC INDONESIA Joni Hermana
Purifikasi Vol 4 No 2 (2003): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (180.91 KB) | DOI: 10.12962/j25983806.v4.i2.338

Abstract

A mathematical modelling was developed based on the theory of mass balance for the oil spills dispersion simulation. The model was tested in Dumai waters, PT. Caltex Pacific Indonesia, and eventually compared with reference model of Worldwide Oil Spill Modelling (WOSM). Dispersion model calculation was based on the spills of 1000 Barrels of Sumatran Light Oil. The simulation demonstrated that the concentration of oil dispersion with 10 m depth after 24 hours was 1.84 x 10-1 gr/m3, while the simulation result of WOSM was 8.84 x 103 gr/m3. The difference was due to the fact that the model was developed by a very simple assumption, that is only taking into account the advection process but not the transformation factor.
Co-Authors Agus Setiawan Agus Slamet Ayu Syarifa Darwinastwantya Chrissantya M. Kadmaerubun Dian Puspitasari Dimas Fikry Syah Putra Laksmisari Rakhma Putri Rachmat Boedisantos Wahyu Dian Septiani