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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Ilmu Pertanian Indonesia J-Sil (Jurnal Teknik Sipil dan Lingkungan) Jurnal Keteknikan Pertanian Rekayasa Sipil Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Irigasi Jurnal Manajemen Aset Infrastruktur dan Fasilitas Jurnal Pengabdian Masyarakat Teknik Jurnal Pusat Inovasi Masyarakat Proceeding Muhammadiyah International Public Health and Medicine Conference Jurnal Manusia dan Lingkungan Jurnal Kesehatan Reproduksi J-Sil (Jurnal Teknik Sipil dan Lingkungan) Kesmas: Jurnal Kesehatan Masyarakat Nasional (National Public Health Journal)
Yudi Chadirin
Departemen Teknik Sipil Dan Lingkungan, FATETA, Institut Pertanian Bogor
Agriculture, Biological Sciences & Forestry Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Library & Information Science Mathematics Medicine & Pharmacology Nursing Public Health Social Sciences Transportation

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Assessment of Reverse Demulsifier Surfactant Performance for Emulsion Separation in Produced Water from Oil and Gas Operations Efrian Pratiwi, Della; Chadirin, Yudi; Novriansyah, Adi; Kurniawan, Allen
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.2.267-276

Abstract

The increasing volume of produced water from oil and gas production requires effective handling before reinjection or disposal. Produced water contains minerals, oil, and other contaminants, making separation processes at refineries insufficient. This study investigates the use of reverse demulsifiers, specifically surfactants (Alkyl Phenol Ethoxylate – APEOs and Natrium Lignosulfonate – NLS), to separate emulsions in produced water. Surfactants reduce surface tension between oil and water, facilitating contaminant removal. Using a jar test apparatus, experiments varied surfactant dosage, stirring speed, and stirring time to determine optimal conditions for achieving water quality standards. Results indicate differences between APEOs and NLS in removing contaminants. APEOs, at 5 ppm, 130 rpm, and 5 minutes, achieved a COD concentration of 80.33 mg/L, while NLS, at 5 ppm, 220 rpm, and 10 minutes, yielded 77.48 mg/L. Both are well below the quality standard of 200 mg/L, proving the effectiveness of this approach. This study highlights the potential of APEOs and NLS as reverse demulsifiers for produced water treatment. Proper application could enable safe reuse or environmentally sound disposal, providing an effective solution to managing produced water in the oil and gas industry.
Indoor Thermal Comfort in Tropical Urban Houses in Indonesia: The Effect of Outdoor Temperature and Windows Nur Azizah, Jihan; Joana Febrita; Yudi Chadirin
Jurnal Teknik Sipil dan Lingkungan Vol. 10 No. 2: October 2025
Publisher : Departemen Teknik Sipil dan Lingkungan IPB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.10.2.347-356

Abstract

Indoor thermal comfort in tropical urban houses is important to manage because it determines the quality of life for the inhabitants. However, it is prone to sudden changes of temperature, especially in a developing country, such as Indonesia, where indoor air circulation is mainly supported by windows. This research aims to evaluate the indoor thermal comfort in Indonesian urban houses, and to analyse the correlation of outdoor temperature and the number of windows on the indoor temperature. This study took place in the Greater Bogor Area with a total of five houses. Outdoor and indoor temperatures were monitored in four areas for each home, which are the living room, bedroom, toilet, and terrace. The dry and wet temperatures were analysed to determine the indoor thermal comfort status based on ASHRAE (The American Society of Heating, Refrigerating, and Air Conditioning Engineers)-55. The correlation between outdoor temperature and the number of windows on indoor thermal comfort was analysed using multiple linear regression. Three of the five houses had areas that met the standard for thermal comfort. The areas were mainly the terrace and the bedroom. The average (standard deviation) of outdoor dry and wet temperatures was 27.79 oC (1.03 oC), and 25.59 oC (1.56 oC), respectively. While for the indoors, the average for dry and wet temperatures were 27.96 oC (1.87 oC), and 25.39 oC (2.31 oC). Outdoor temperature and number of windows showed insignificant correlation with indoor temperature (R2: 0.1448; adj R2: 0.08145; p>0.121), opposing the previous studies on the effect of outdoor temperature and number of windows on indoor temperature. Apart from this finding, the effect of windows/ventilation's presence on indoor thermal comfort cannot be undermined. As ventilation serves as a part of human adaptation to heat, it is becoming more important amidst the increased extreme heat caused by climate change.
Application of Deep Sea Water (DSW) for Nutrient Supplement in Hydroponics Cultivation of Tomato : Effect of supplemented DSW at Different EC Levels on Fruit Properties Chadirin, Yudi; Matsuoka, Takahisa; Suhardiyanto, Herry; Susila, Anas D.
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 35 No. 2 (2007): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1062.763 KB) | DOI: 10.24831/jai.v35i2.1320

Abstract

Deep sea water (DSW) has the potential characteristics for nutrient supplement in hydroponics cultivation. This experiment was carried out to evaluate the application of DSW as a nutrient supplement for tomato cultivation in hydroponics system. Tomatoes were grown on 4 beds in nutrient film technique (NFT) system circulated with 1.5 dS m-1(control), 10 dS m-1 15 dS m-1 and 20 dS m-1 of nutrient solution, respectively.  DSW was supplemented into nutrient solution of control to obtain high EC level. Fresh weight of fruits decreased varied from 10-20% by increasing DSW concentration in nutrient solution, but the effect of the treatment was not found on size of 3rd truss fruits.  The density of fruits increased as the DSW concentration increased in nutrient solution. Tomato stiffness of treated plants had almost the same value among EC levels although different among 3 trusses.  Fruit quality parameters increased by increasing the DSW concentration in nutrient solution. Treated plants circulated with EC 20 dS m-1 supplemented nutrient solution for 2 weeks produced tomatoes with highest soluble solids, 8.0% Brix or increased 30% of control (1st truss).  However there were no significant effect on fruits of 2nd and 3rd trusses.  DSW could be used as nutrient supplement for hydroponics cultivation of tomato.     Key words :   Deep sea water, fruit quality, electrical conductivity, tomato
Pembuatan Hand-Sanitizer Alami sebagai Upaya Peningkatan Pola Hidup Sehat Masyarakat Desa Sukorejo, Kabupaten Wonosobo Pribawanto, Achmad Yopi Suyitno; Mudzaky, Rafi Hanif; Utami, Nani Tri; Salsabella, Hasna Farah; Faizi, Nur; Hidayatullah, Muhammad Syarif; Chadirin, Yudi
Jurnal Pusat Inovasi Masyarakat Vol. 4 No. 1 (2022): April 2022
Publisher : Direktorat Pengembangan Masyarakat Agromaritim, Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4239.98 KB) | DOI: 10.29244/pim.4.1.17-25

Abstract

Perkembangan pandemi Covid-19 memberikan dampak yang signifikan pada kesehatan, lingkungan, dan ekonomi masyarakat. Tingginya pengetahuan masyarakat tidak selalu disertai dengan kepatuhan terhadap pelaksanaan protokol kesehatan. Kewaspadaan masyarakat desa dalam menghadapi pandemi juga berpotensi mengalami penurunan akibat efek jenuh pada masyarakat. Sosialisasi dan pembinaan bersama masyarakat dalam upaya menghadapi pandemi dapat dilakukan dengan pelatihan pembuatan hand-sanitizer alami. Pelatihan ini dilakukan di Desa Sukorejo, Kabupaten Wonosobo pada tanggal 6 Agustus 2021 dihadiri oleh 16 warga. Pelatihan ini diawali dengan sosialisasi bahan alami yang dapat digunakan untuk membuat hand-sanitizer dilanjutkan dengan praktik pembuatannya. Kegiatan ini menghasilkan tingginya antusias masyarakat dalam mengikuti program dan pemahaman yang baik mengenai pembuatan hand-sanitizer alami dari total 16 responden peserta. Berdasarkan tes pemahaman yang dilakukan setelah kegiatan, 93,75% peserta mampu menjawab pertanyaan dengan benar atau 15 peserta dari 16 peserta menjawab dengan benar dan hanya satu peserta yang tidak tepat dalam menjawab. Pada pertanyaan terkait komposisi bahan yang digunakan 86,77% peserta menjawab dengan benar atau 14 dari 16 peserta menjawab dengan benar. Hasil ini menunjukkan masyarakat telah memahami dengan baik materi pelatihan. Keberlanjutan program dilaksanakan melalui pembagian produk hasil kegiatan dan resep pembuatan hand-sanitizer melalui grup percakapan sehingga dapat diproduksi ulang oleh masyarakat.
Co-Authors . Rudiyanto Adi Novriansyah, Adi Agus Eko Handoko Allen Kurniawan Anas Dinurrohman Susila Andik Pribadi Andriyani Andriyani Andriyani Andriyani Angie Irmajulianna Anisa Nurul Syafitri Anisa Nurul Syafitri Anna Farida Ardina Ulya Arief Sabdo Yuwono Arif Rahmat Aris Purwanto Bella Arinda Putri Bella Yuliani Budi Indra Setiawan Chairunnisa Chairunnisa Chairunnisa Chairunnisa Chusnul Arief Chusnul Arif Devina Alifia Fadhilah Devya Meisnnehr Dian Hestiyantari Efrian Pratiwi, Della Elviana Elviana Elviana Elviana, Elviana Emir Aulia Emir Aulia Endro Priherdityo Erizal , Ernirita Fauzan Subeantoro Fazrina Andriani Sakinah Lubis Feby Elvira Fikha Raihani Fredinan Yulianda Giri Rasyidpradana Ganda Gumilang Agus Gozali Hadi Nasbey Herlina, Lily Hernani Djarir Hernani Djarir, Hernani Herry Suhardiyanto I Wayan Wirya Aristyana Joana Febrita Kazutoshi Osawa Kazutoshi Osawa Layla Alifani Ekrep Lily Herlina Lina Karlinasari Manik, Ayu Sartika Imia Marhabsyah Zhaki Moch Ridwan Widiansyah Mochammad Izzudin Ma’mun Mohamad Solahudin Mudzaky, Rafi Hanif Muhammad Adhiragil Kandyas Muhammad Ryan Natasaputra Muhammad Ryan Natasaputra, Muhammad Ryan Muhammad Syarif Hidayatullah, Muhammad Syarif Munaya Fauziah Munaya Fauziah Nur Azizah, Jihan Nur Faizi Nurul Asmarani Damayanti Rahardjo Nurul Chairunnisa Prastowo Prastowo Prastowo Prastowo Pribadi, Andik Pribawanto, Achmad Yopi Suyitno Priherdityo, Endro Putra, Heriansyah Risma Amelia Roh Santoso B Waspodo Salsabella, Hasna Farah Satyanto Krido Saptomo Shahilla Larasaty Siti Komariah Slamet Susanto Sumini . Syamsul Arifin TAKAHISA MATSUOKA Titiek S. Yuliani Titin Nuryawati Titin Nuryawati Tri Suryani Tria Astika Endah Permatasari Triyogo Aleksandria Utami, Nani Tri WINDU NUR AZZUKHRUF SIADARI Yayu Romdhonah Zhaki, Marhabsyah