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All Journal IPTEK Journal of Proceedings Series IJOCE (International Journal of Offshore and Coastal Engineering)
Harmin Sulistyaning Titah
Institut Teknologi Sepuluh Nopember
Computer Science & IT Engineering

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Groundwater Treatment in Rungkut Sub-District, Surabaya Setyo Budi Kurniawan; Ipung Fitri Purwanti; Bieby Voijant Tangahu; Harmin Sulistyaning Titah; Sarwoko Mangkoedihardjo
IPTEK Journal of Proceedings Series No 5 (2017): Simposium I Jaringan Perguruan Tinggi untuk Pembangunan Infrastruktur Indonesia (2016)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (210.47 KB) | DOI: 10.12962/j23546026.y2017i5.3137

Abstract

Results of Environment agency laboratory test show the Surabaya’s clean water which still meet quality standards by the year 2008 reached 97.5% and decreased to 58.2% in 2009. Rungkut is one of the sub-districts in Surabaya where people fulfill their daily water by using well water or ground water. Nowadays, people feel their well water is not feasible in use for everyday needs anymore. This was due to the decreased quality of well water because the contamination of organic matter. These community services activities try to help Rungkut Sub-District people in meeting their water needs. Efforts will be preceded by a hearing, sampling groundwater at some point, and test the quality of the groundwater. The results of groundwater quality test obtained will be used to create a water treatment unit which can be operated simply by the community. Based on the groundwater quality test obtained, the pilot scale unit of groundwater treatment designed and installed using multiple tray aerator and carbon active filter combination. Multiple tray aerator installed for 3 steps of aeration and the carbon active filter contains 60% (volume by volume) carbon active media.
Effect of Heat Treatment and Types of Bacteria on Corrosion Resistance At Steel Materials (API 5L and ASTM A53) in the Marine Environment Herman Pratikno; Harmin Sulistyaning Titah; Febrian Ramadhana Sastradimaja
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 1, No 1 (2017)
Publisher : DRPM (Direktorat Riset dan Pengabdian kepada Masyarakat) ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (852.27 KB) | DOI: 10.12962/j2580-0914.v1i1.2876

Abstract

Corrosion is the result of damage to material degradation through a chemical or electrochemical reaction spontaneously and causes a decrease in the quality of the material. One of the causes of corrosion is the presence of bacteria on the material. The danger posed by corrosion is fatality, especially on offshore platforms, namely cessation of production at offshore rigs. This study is an experiment using material carbon steel API 5L Grade B and ASTM A53 commonly used as a base for the manufacture of subsea pipelines. Material to be heat-treated before immersion for corrosion test in artificial seawater (salinity 35‰), which have been added with bacteria and without bacteria. The method used in measuring the rate of corrosion steel data is the weight loss. The highest corrosion rate of the original material ASTM A53 and API 5L with the addition of T. ferrooxidans bacteria are, respectively, 3.63 mpy and 3.50 mpy. While the lowest corrosion rate of ASTM A53 and API 5L both with heat treatment but without adding bacteria are 2.33 mpy and 2.01 mpy. This indicates that the steel API 5L have high levels of corrosion resistance, better than ASTM A53 in the marine environment with bacteria or without bacteria.
Co-Authors Febrian Ramadhana Sastradimaja Herman Pratikno, Herman Ipung Fitri Purwanti Kurniawan, Setyo Budi Sarwoko Mangkoedihardjo Tangahu, Bieby Voijant