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All Journal Reaktor Jurnal Media Gizi Indonesia (MGI) Jurnal Teknik
Nadiem Anwar
Universitas Jenderal Achmad Yani
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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BIOACTIVE COMPOUNDS FROM PURPLE ROSELLE CALYX (HIBISCUS SABDARIFFA L.) EXTRACT USING MULTISTAGE COUNTERCURRENT METHOD Meilya Suzan Triyastuti; Nadiem Anwar
Media Gizi Indonesia Vol. 17 No. 1 (2022): JURNAL MEDIA GIZI INDONESIA (NATIONAL NUTRITION JOURNAL)
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/mgi.v17i1.1-10

Abstract

Multistage Countercurrent Extraction (MCE) is a new extraction technique used to extract bioactive compounds (anthocyanin, quercetin, antioxidants) from purple roselle calyxes (Hibiscus sabdariffa L.). This study of purple roselle calyxes extract with three-stage MCE was carried out at a comparison of roselle calyxes and distillation water solvent 1:10, extraction temperatures of 50°C, 60°C, 70°C and extraction time of 15, 30, 45 minutes. Purple roselle calyxes using the MCE method contained the highest anthocyanin content of 2815,43 mg/L, quercetin content 59,25 mg/L, and antioxidant capacity 197,6 ppm. The results showed that the content of bioactive compounds increased by increasing the extraction temperature and extraction time. MCE is an efficient technique for extracting bioactive compounds from roselle calyxes. Roselle calyxes that are rich in antioxidants have the potential as a good food colorant andnatural antioxidants.
Biogas dari Rumput Nadiem Anwar
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 6 No 1 (2007): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26874/jt.vol6no1.265

Abstract

Biogas adalah hasil perombakan bahan organik oleh berbagai jenis mikroorganisme pada kondisi anaerobik. Biogas dapat dihasilkan dari berbagai bahan baku, salah satunya adalah rumput yang sangat mudah tumbuh di lingkungan yang sangat bervariasi. Penelitian ini bertujuan untuk mempelajari pembuatan biogas dari rumput dalam dijester alir kontinyu menyerupai PFR dengan volume cairan 25 L. Hasil penelitian menunjukkan bahwa rumput dapat digunakan sebagai bahan baku pembuatan biogas. Waktu aklimatisasi untuk pembuatan biogas dari rumput, kurang dari 74 hari dengan waktu tinngal hidrolik 100 hari. Komposisi biogas yang dihasilkan telah memenuhi komposisi minimal gas metana untuk dapat dibakar, yaitu: 40,7% V 54,8% V. Untuk waktu tinggal hidrolik 100 hari dengan umpan 160g rumput per liter umpan, diperoleh 3 L biogas perhari per25 L volume cairan dengan tekanan gas 1 atm.
Treatment of palm oil mill effluent by an integrated aeration–bipolar electrocoagulation system Febrianto Adi Nugroho; Handoko Rusiana Iskandar; Nadiem Anwar; Tiara Ariani Putri; Putu Teta Prihartini Aryanti
Reaktor Volume 26 No.1 April 2026
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.78989

Abstract

Electrocoagulation (EC) has increasingly been used in wastewater treatment, including palm oil milling effluent (POME), due to its ease of operation and less sludge production. In this study, POME was treated using an integrated aeration and EC process, which was conducted continuously at a constant flow rate of 500 mL.min-1. The agitation process was applied in the EC reactor with a rotating speed of 20 rpm to shorten the electrolysis reaction time. The EC reactor was equipped with 6 electrodes as baffles. Two current densities (12 and 15A.m-2) and electrode configurations (3A-3C and 2A-2C-2B) were used, and the resulting effluents were compared. The experimental results showed that the high contaminant removal was obtained when the electrode configuration was 2A-2C-2B and the current intensity of 15 A. The BOD removal efficiency was 91.36% (from 132 to 11.4 mg.L-1), COD of 81.27% (from 386 to 72.3 mg.L-1), TDS of 47.64% (from 645.5 to 338 mg.L-1), TSS of 76.27% (from 43.7 to 10.4 mg.L-1), and turbidity of 96.46% (from 59.65 to 2.11 NTU). Meanwhile, the total energy requirement was 21.33 kWh.m-3 with the pH of the effluent of 8.05. The combination of aeration-EC could be used as an alternative POME treatment to achieve high contaminant removal efficiency.
Co-Authors Febrianto Adi Nugroho Handoko Rusiana Iskandar Meilya Suzan Triyastuti, Meilya Suzan Putu Teta Prihartini Aryanti Tiara Ariani Putri