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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Jurnal Matematika Sains dan Teknologi Journal of Environmental Engineering & Waste Management International Journal of Applied Sciences and Smart Technologies
Udi Syahnoedi Hamzah
Universitas Indonesia
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mathematics Other

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LIMBAH CAIR PANAS BUMI DAN DAMPAKNYA TERHADAP LINGKUNGAN Yuniarto Yuniarto; Tri Edi Budhi Soesilo; Udi Syahnoedi Hamzah
Jurnal Matematika Sains dan Teknologi Vol. 17 No. 2 (2016)
Publisher : LPPM Universitas Terbuka

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (445.305 KB)

Abstract

Geothermal Power Plant Gothermal power plant is one of the green energy which produces low waste, including wastewater. The wastewater come from geothermal fluids that is not reinjected into the reservoir. its contains Arsenic (As), a dangerous chemical. Ulumbu geothermal Power Plant wastewater is discharged to the river nearby, Waekokor river. Arsenic (As) concentration in The wastewater has not been measures. The purpose of this research is to identify Arsenic (As) concentration in the geothermal wastewater. The result of this research shows that geothermal wastewater Arsenic (As) concentration is still below the regulation, that is 0,0365 mg/l. Geothermal wastewater discharge has no effect to the Arsenic (As) concentration in the river. Pembangkit Listrik Tenaga Panas Bumi Panas Bumi (PLTP) merupakan salah satu sumber energi yang ramah lingkungan karena menghasilkan limbah yang rendah, salah satunya adalah limbah cair. Limbah cair ini berasal dari fluida panas bumi. Fluida panas bumi yang tidak diinjeksikan kembali akan menjadi limbah cair. Salah satu zat kimia yang terkandung dalam limbah cair adalah Arsen (As). Pada lapangan panas bumi Ulumbu, limbah cair yang dihasilkan dari pembangkit listrik tenaga panas bumi dibuang kesungai Waekokor. Konsentrasi Arsen (As) pada limbah cair tersebut sampai dengan saat ini belum pernah diukur dan diteliti. Penelitian ini bertujuan untuk mengetahui besarnya konsentrasi Arsen (As)pada limbah cair yang dibuang ke Sungai Waekokor dan dampaknya terhadap lingkungan. Hasil dari penelitian ini menunjukkan bahwa konsentrasi Arsen (As) pada limbah cair PLTP Ulumbu yang dibuang ke sungai Waekoor masih dibawah baku mutu yang ditetapkan oleh pemerintah. Hasil dari penelitian ini menunjukkan juga bahwa pembuangan limbah cair ini tidak memberikan dampak terhadap lingkungan.
PENGURANGAN EMISI CO2 MELALUI PENGELOLAAN ENERGI LISTRIK DI RUANG PUBLIK HOTEL (Studi Kasus Di Hotel ABC Jakarta) Riska Melanie; Udi Syahnoedi Hamzah
Journal of Environmental Engineering and Waste Management Vol 1, No 2 (2016)
Publisher : President University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (412.836 KB) | DOI: 10.33021/jenv.v1i2.123

Abstract

Hotels commonly still use electric energy inefficiently. One kWh consumption equals to 5,2041x10-4 mtCO2 emission. This research discusses about reduction of CO2 emission through electric energy management in hotel’s public spaces. The design was a survey with 90 respondents in 4-star hotel ABC Jakarta.  The kWh measurements were conducted in Lobby Hotel ABC. The research was done in 2012 and it showed correlation between workers’ knowledge, attitude and behavior to the quality of electric energy management. The hotel showed low quality of electric energy management. Electric energy use for illumination in Hotel ABC was 3,232.8 kWh/year equals to1.68 mtCO2/year. The experiment was done by using LED lamps with reduction of CO2 results for Lobby Hotel ABC was 55.90% equals to 0.94 mtCO2/year. In conclusion, worker’s behavior gives influence to the quality of electric energy management. To improve the quality of electric energy management, it is recommended to determine electric energy efficiency policy and program, relevant training and working procedures, implementation of best practices and if necessary use LED lamps to replace incandescent and CFL lamps.
Smart Technology in Construction Industry: Opportunity during COVID-19 Pandemic Putri Fatimah; Ahyahudin Sodri; Udi Syahnoedi Hamzah
International Journal of Applied Sciences and Smart Technologies Volume 05, Issue 01, June 2023
Publisher : Universitas Sanata Dharma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24071/ijasst.v5i1.5583

Abstract

The construction industry is a sector that plays an essential role in economic growth. The COVID-19 pandemic is an uncertain situation that significantly affects humans and industries, including the construction industry. The operational construction projects are complex with various activities and involve a large of workers. Prevention of the spread of COVID-19 that changes lifestyles and improves technology adoption. This study examines the relationship between increased technology adoption and limited workers’ social interaction in construction projects during the pandemic. A questionnaire survey was conducted to construction workers in DKI Jakarta, 74 valid responses were collected and correlation analyses were performed with SPSS version 28. The result of this study indicated a significant and positive correlation between increased technology adoption and limited workers’ social interaction in a construction project during the pandemic. There are opportunities for the construction industry to implement a digital transformation, Building Information Modelling (BIM), and intelligence visualization technologies to cope with the impact of the COVID-19 pandemic on construction activities. This study provides evidence that smart technologies application has a significant role in supporting the construction industry to mitigate the impact of the COVID-19 pandemic and opportunities for continuous improvement towards post-pandemic.
Environmental Impact Assessment of Co-firing Implementation at X Steam Power Plant, West Java Dessy Tri Nugraheni; Rachmadhi Purwana; Udi Syahnoedi Hamzah
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 20, No 2 (2023): July 2023
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v20i2.334-344

Abstract

Co-firing is the activity of adding biomass to the combustion process as a mixed fuel for coal in power plants. In 2021 co-firing has been carried out at 17 PLTUs in Indonesia. The co-firing program at a steam power plant is a form of reducing coal consumption which can reduce carbon emissions while increasing the use of renewable energy without increasing investment in new power plants. PLTU X in West Java, Indonesia has implemented co-firing using sawdust biomass using the direct method without adding or modifying equipment. The use of biomass is obtained from wood-cutting waste, with a ratio of sawdust biomass usage <5%. Assessment of potential environmental impacts is carried out using the Life Cycle Assessment (LCA) method with cradle-to-gate coverage through two scenarios, namely full coal burning, and co-firing. The functional unit uses 1 kWh and the potential impact assessment method used IPCC2021 GWP100 and the CML-IA baseline. The results of the study obtained an assessment of the potential for environmental impact that could reduce the Global Warming Potential (GWP) by 0.13%, acidification by 0.40%, and eutrophication by 0.14%, but there was an increase in ozone layer depletion by 0.72%.
Co-Authors Dessy Tri Nugraheni Putri Fatimah Rachmadhi Purwana Riska Melanie Sodri, Ahyahudin Tri Edi Budhi Soesilo Yuniarto Yuniarto