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All Journal Jurnal Rekayasa Proses
Ahmad Tawfiequrrahman Yuliansyah
Departemen Teknik Kimia, Fakultas Teknik, Universitas Gadjah Mada Jl Grafika No. 2 Kampus UGM, 55281 Yogyakarta
Chemical Engineering, Chemistry & Bioengineering

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Pemanfaatan cangkang biji pala sebagai briket dengan proses pirolisis Rukmana Rukmana; Suryo Purwono; Ahmad Tawfiequrrahman Yuliansyah
Jurnal Rekayasa Proses Vol 9 No 2 (2015): Volume 9, Number 2, 2015
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.31033

Abstract

The abundance of nutmeg seed shells in Tidore is the reason to study the possibility to produce charcoal briquettes. The use of charcoal briquettes was expected to reduce waste of nutmeg seed shell and can be an alternative energy source with a high economic value. This study aims to investigate the effect of pyrolysis temperature and composition of tapioca adhesive to resulting quality of briquettes. The first step of the research was the preparation of nutmeg seed shells consisted of drying and size reduction into less than 20 mesh size. Afterward, the powder was put into furnace and heated to 350°C, 400°C, and 450°C for 90 minutes. During the process, volume of gas and liquids were measured every 15 minutes, while gas was sampled at 60-minute reaction. When pyrolysis was finished, about 20 g of charcoal was mixed with tapioca adhesive. The compositions of adhesive were 10%, 15%, 20%, 25%, and 30%. Finally, composite was formed in a cylindrical shape and compressed with hydraulic press at f 3 tons weight for a minute. The briquettes were then dried and analyzed with proximate analysis test. The results show that the highest calorific value was 6717.74 cal/g for material pyrolyzed at 450oC and 20% adhesive. The effect of adhesive on shatter index test showed that increasing composition of adhesive makes a better briquette quality as shown by a lower shatter index. In this study, the minimum weight loss was obtained by the addition of 30% adhesive.
Evaluasi aspek teknis dan lingkungan instalasi pengolahan air limbah (IPAL) komunal di Kabupaten Sleman Yogyakarta Dwi Saputri; Fajar Marendra; Ahmad Tawfiequrrahman Yuliansyah; Agus Prasetya
Jurnal Rekayasa Proses Vol 15 No 1 (2021): Volume 15, Number 1, 2021
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.65833

Abstract

As the producer of waste (both in solid form and wastewater), the increase of population creates a dominant effect on environmental problems. Escalation of the amount of domestic wastewater has led to greater sanitation problems. Indonesian government has carried out several programs for improving sanitation access and facilities. Community-based wastewater treatment plant (Communal WWTP) is one of the priority programs. Sleman Regency in Special Province of Yogyakarta owns 131 communal WWTP, where the oldest one had been built in 2006 while the newest one was installed in 2018. In this study, the techno-environmental assessment of communal WWTP in the District of Sleman, Yogyakarta was carried out. Sampling selection of communal WWTPs was undertaken using Stratified Random Sampling techniques. Data collection was executed by a combination of field surveys and in depth-interview of several relevant personnel. The study was done for 30 communal WTTP in various Districts in Sleman regency. Assessment was carried out based on the Likert scale of 4. The results showed that the average score for environment aspect was 2.94 (good), while that for technical aspect was 3.52 (very good). Overall, the techno-environmental score of communal WWTP in Sleman Regency, Yogyakarta was 3.23 out of 4, which was categorized as good.
Co-Authors Agus Prasetya Dwi Saputri Fajar Marendra Rukmana Rukmana Suryo Purwono