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All Journal Jurnal Ilmu Tanah dan Lingkungan (Journal of Soil Science and Environment) Electrician : Jurnal Rekayasa dan Teknologi Elektro
Tommy Kurniawan
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Agriculture, Biological Sciences & Forestry Control & Systems Engineering Electrical & Electronics Engineering Engineering Environmental Science

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BIOTEKNOLOGI LINGKUNGAN UNTUK PENANGGULANGAN LIMBAH MENGANDUNG KROM Dwi Andreas Santosa; Tommy Kurniawan; F. Dian Lina
Jurnal Ilmu Tanah dan Lingkungan Vol 10 No 2 (2008): Jurnal Ilmu Tanah dan Lingkungan
Publisher : Departemen Ilmu Tanah dan Sumberdaya Lahan, Fakultas Pertanian, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (323.817 KB) | DOI: 10.29244/jitl.10.2.50-53

Abstract

The biotechnological approaches for treatment of wastewater are widely studied within the last two decades. We show that this approach can be used for treatment of Cr-contaminated wastewater. The sulfate reducing bacteria Desulfotomaculum orientis ICBB 1204 is used in a laboratory experiment to treat Cr-contained wastewater from metal plating industry and the oil and gas company, PT VICO, East Kalimantan. After adaption of the bacteria for around 10 days in the wastewater containing 100 ppm Cr, the process of Cr reduction took place and the Cr in the medium were reduced 92.7% within 20 days. The similar results were achieved on the treatment of PT VICO’s wastewater. The Cr content in the wastewater decreased from 6.54-6.76 to 0.08-0.09 ppm and the pH increased from 3 to 5 – 6 within 20 days incubation period.Keywords: Cr detoxification, Desulfotomaculum orientis ICBB 1204, sulphate reducing bacteria, wastewater
Sistem Kendali Kadar Air dan Monitor Suhu Pengering Lada Hitam Berbasis Jaringan Multi Sensor Tommy Kurniawan
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 19 No. 3 (2025)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v19n3.2784

Abstract

Industri Agribisnis hasil perkebunan pasca panen, kadar air penting dalam menentukan kualitas biji lada hitam. Penelitian pengembangan ini menyajikan tentang sistem kendali kadar air dan memonitor suhu pengering lada hitam berbasis multi sensor. Sensor PT100RTD pengindera suhu, sensor THD-DD2-C pengindera suhu dan kelembaban dan PLC CP1H-XA40DR-A sebagai central processing unit terkait dengan sistem SCADA sebagai user interface. Perancangan bertujuan mengindera suhu dan kelembapan kadar air lada hitam. Selanjutnya tingkat kelembaban dan suhu dikondisikan kadar air lada hitam berada 11 % sd. 12%. Perancangan berhasil diinstal untuk memantau kadar air lada hitam. Dengan menerapkan sistem ini, perbedaan rata-rata kadar air 10.59% saat pratest dan 11,57% saat posttest mempunyai efisiensi selisih kehilangan berat lada hitam selama proses berkurang 0,98%. Sistem kendali yang dibangun memiliki tingkat keakuratan cukup tinggi dengan error 2,76 %. Operasi SCADA sebagai user interface yang dibangun memungkinkan pengguna untuk memonitoring secara real time.
Co-Authors DWI ANDREAS SANTOSA F. Dian Lina