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All Journal Jurnal Ilmiah Elektronik Infrastruktur Teknik Sipil CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Ilmiah Teknik Sipil Jurnal Kimia (Journal of Chemistry) Buletin Udayana Mengabdi Jurnal Veteriner MEDIA KOMUNIKASI TEKNIK SIPIL JURNAL TEKNOLOGI LINGKUNGAN Jurnal Teknik Pengairan: Journal of Water Resources Engineering EnviroScienteae Portal: Jurnal Teknik Sipil International Journal of Engineering and Emerging Technology Menara: Jurnal Teknik Sipil Cassowary Jurnal Widya Biologi Agrica: Journal of Sustainable Dryland Agriculture International Journal of Research in Vocational Studies (IJRVOCAS) Nata Palemahan: Journal of Environmental Engineering Innovations
Yenni Ciawi
Fakultas Teknik, Universitas Udayana
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Medicine & Pharmacology Public Health Social Sciences Transportation Veterinary Other

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Effectiveness of Sludge Microbial Consortia in the Bioremediation of Detergent-Containing Launderette Wastes Yan Ramona; Esti Arisetya Dewi; Yenni Ciawi; I Wayan Budiarsa Suyasa
Cassowary Vol 5 No 2 (2022): June
Publisher : Program Pascasarjana Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/casssowary.cs.v5.i2.162

Abstract

This project investigated the potential of microbial consortia obtained from several sources to reduce or eliminate detergent concentration in the wastes of launderette businesses found in the capital city of Bali. Before being used as active starters, the consortium of microbiota contained in the 3 waste sources was enriched in a medium containing (g/l); 1 glucose, 0.05 K2HPO4, 0.05 KH2PO4, 0.05 (NH4)2[Fe(SO4)2].6H2O, 0.01 MgSO4, 0.01 yeast extract, 1800 mL distilled water, and 200 mL of wastewater of launderette industries. An important parameter used to indicate microbial growth was the level of the volatile solid substrate (VSS) in the enrichment medium. The microbial culture that showed the highest VSS only was further investigated in the main experiments by observing its effectiveness in reducing detergent linear alkyl-benzenesulfonates (LAS) and the chemical oxygen demand (COD) of launderette wastes. In this project, microbial consortia developed from detergent-containing launderette wastes were the most active starter to decrease the COD and LAS detergent content following 7 days of exposure. This starter (microbial consortia developed from this launderette waste) showed the highest value of VSS when compared to those collected from other sources, and this was reached on day 4. In the main experiment, 85.5% and 91.9% reduction of LAS and the COD of the wastes, respectively, were observed following exposure of the launderette waste with this culture starter. This indicated that these microbial consortia have the possibility to be developed as a potential starter in larger scales of detergent bioremediation.
Penyediaan Air Bersih di Era Tatanan Normal Baru Yenni Ciawi; Ananda Sri Phartiswari; Yan Ramona; Annisa Maria Hidayati
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 13 No. 2 (2022)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2022.013.02.07

Abstract

Tahun 2020 merupakan tahun terpanas sepanjang sejarah manusia, padahal sejak akhir 2019 kegiatan manusia yang menimbulkan polusi udara sudah berkurang banyak karena pandemi Covid-19. Pemanasan global yang sudah berlangsung menyebabkan cuaca ekstrim di banyak tempat di seluruh dunia. Sebagian permukaan bumi semakin kering sedangkan di bagian yang lain, banjir dan angin topan semakin sering terjadi. Sementara itu, pandemi Covid-19 yang mengharuskan cuci tangan lebih sering, menyebabkan kebutuhan air semakin meningkat dengan pesat. Tujuan tulisan ini adalah merangkum upaya-upaya penyediaan air yang sudah ada yang dapat dilakukan untuk meminimkan dampak kekeringan pada saat pandemi Covid-19 dan pada masa tatanan normal baru. Penelitian dilakukan dengan metode review traditional terhadap tulisan pada rentang tahun 1981-2022. Ditemukan bahwa kearifan lokal dan  teknologi baru yang relatif sederhana dapat dimanfaatkan untuk penyediaan air bersih bahkan sampai tataran rumah tangga sehingga menjangkau masyarakat banyak, yaitu dengan desalinasi air laut, memanfaatkan air hujan, menyaring air limbah, memanfaatkan waduk bawah tanah, menggunakan saringan batu tradisional, saringan keramik, dan membran polimer.
KAJIAN AWAL PEMBUATAN BETON POROUS UNTUK PAVING BLOCK RAMAH LINGKUNGAN Yenni Ciawi; Made Alit Karyawan Salain; I Putu Adi Yana
EnviroScienteae Vol 18, No 3 (2022): ENVIROSCIENTEAE VOLUME 18 NOMOR 3, NOVEMBER 2022
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/es.v18i3.14789

Abstract

In heavily populated urban areas, high rainfall can cause inundation and even flooding because the catchment area is decreasing. To reduce rainwater runoff and increase groundwater recharge, porous concrete can be used in housing area, in parking lots and roads with low traffic loads. Porous concrete is an environmentally friendly and sustainable building material. This study aims to examine the effect of aggregate composition on the porosity and tensile strength of porous concrete. The composition of the concrete mixture is determined based on the weight ratio between portland cement type I (PC) and coarse aggregate (AK), i.e. 1 PC : 3 AK, 1 PC : 4 AK, and 1 PC : 5 AK and the ratio of fine aggregate weight (AH) of 0 ; 0.5 ; 1, and the w/c is 0.5. For each variation, six 150 mm cubes were made. The parameters tested were slump, volume weight, porosity and compressive strength at day 28. The results show that the more coarse aggregate, the lower the volume weight and its compressive strength, and the higher the porosity and slump. Fine aggregate addition increases the compressive strength and volume weight and decrease slump value and porosity. The highest slump value (205 mm) and the smallest volume weight and compressive strength were obtained from concrete mixture with PC/AK=1/5 without AH content. The smallest slump (170 mm) and porosity values were obtained from concrete mixture with PC/AK=1:3 and AH/AK=1 and the largest volume weight and compressive strength. In this study, the slump value tends to be directly proportional to porosity and inversely proportional to volume weight and compressive strength. For further research, it is recommended that the w/c value be reduced to get a larger porosity value but without a significant decrease in compressive strength.
Treatment of Mixer Truck Wash Water of a Ready-mix Concrete Batching Plant Using a Low Cost Modified Sand Filter: Pengolahan Air Cucian Truk Mixer Pabrik Beton Siap Pakai Menggunakan Modifikasi Filter Pasir Berbiaya Rendah YENNI CIAWI; I PUTU GUSTAVE SURYANTARA PARIARTHA; AYUB BENNY KRISTIANTO
Jurnal Teknologi Lingkungan Vol. 23 No. 1 (2022)
Publisher : Center for Environmental Technology - Agency for Assessment and Application of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.419 KB) | DOI: 10.29122/jtl.v23i1.5023

Abstract

ABSTRAK Pembangunan infrastruktur dan perumahan membutuhkan beton dalam jumlah besar, yang sebagian dipasok oleh pabrik beton siap pakai. Tingginya kebutuhan air dan produksi air limbah oleh industri ini menyebabkan masalah lingkungan yang signifikan. Sebuah pabrik beton di Bali mengolah air limbahnya dengan lima kolam sedimentasi sederhana yang dilengkapi dengan saringan ijuk antar kolam dan kemudian air hasil olahan dibuang ke hutan bakau di sekitarnya. Meskipun nilai Chemical Oxygen Demand (COD) telah diturunkan dari 316,149 mg/L menjadi 146 mg/L, air limbah ini masih berpotensi merusak biota hutan bakau. Padahal, air bisa didaur ulang untuk membersihkan peralatan atau bahkan menjadi air proses. Penelitian ini bertujuan merancang proses pengolahan yang sederhana dan murah beserta peralatannya. Air limbah yang berasal dari bak pengendapan di pabrik beton siap pakai diolah di laboratorium menggunakan tawas tetapi hasilnya tidak memuaskan sehingga dipilih metode fisika dengan menggunakan kolam sedimentasi dan saringan pasir lambat yang dimodifikasi, dan berhasil menurunkan nilai COD sebesar 82,83% pada pH 12,27 dan mendaur ulang 84% air limbah atau 26,7% kebutuhan air total industri ini. Kata kunci: pengolahan air limbah, beton siap pakai, desain bangunan, daur ulang air   ABSTRACT Infrastructure and housing developments require vast quantities of concrete, which are supplied by the ready-mix concrete (RMC) batching plant. This industry's high water demand and wastewater generation have caused significant environmental problems. An RMC batching plant in the southern part of Bali produces liquid waste, which is disposed of into the surrounding mangrove forests after being treated using five sequential unlined wash water ponds and palm fibre. Although the COD value has been decreased from 316.149 mg/L of untreated wastewater to 146 mg/L after treatment, this still has the potential to harm the mangrove biota. On the other hand, the water can still be reclaimed for cleaning purposes or even incorporated into process water. The work aims to design a low cost and simple wastewater recycling process and equipment. Wastewater was collected from the existing settling basin at the RMC batching plant and treated in the laboratory. It was found that the chemical treatment of wastewater using alum did not produce satisfactory results; therefore, a physical method was chosen by employing a sedimentation pond and a modified slow sand filter. It removed 82.83% of the COD at pH 12.270 and reclaimed 84% wash water or 26.7% of total water needed for this industry. Keywords: wastewater treatment, ready-mix concrete, building design, water recycles
Production of Biogas As An Alternative Green Energy with Organic Wastes As The Main Raw Materials Yenni Ciawi; Ni Made Utami Dwipayanti; Anak Agung Gede Indraningrat; Yan Ramona
Jurnal Veteriner Vol 24 No 1 (2023)
Publisher : Faculty of Veterinary Medicine, Udayana University and Published in collaboration with the Indonesia Veterinarian Association

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19087/jveteriner.2023.24.1.138

Abstract

This research focused on the utilization of four different organic wastes, namely snake fruit, orange, cabbage, and tomato wastes, for the production of biogas. The main objectives were twofold: (1) to investigate the characteristics and biodegradability of these wastes, and (2) to evaluate their potential for anaerobic methane production. The experiment was conducted using 250 L bioreactors, with the four wastes serving as the primary raw materials. A starter culture of cattle dung was added, and the mixture was incubated for eight weeks. Regular sampling and analysis were carried out to assess water content, biodegradability, specific rate of volatile material reduction, and gas yield. The results showed that the water content of the four waste systems remained relatively consistent throughout the experiment. Biodegradability analysis revealed that all of the wastes were biodegradable, with varying levels of degradation ranging from 23.10 ± 2.89% to 59.84 ± 4.17%. Snake fruit waste exhibited the highest resistance to degradation, while tomato waste was the most easily degradable. Kinetic analysis indicated specific rates of volatile material reduction (µ) of 0.006 ± 0.0006 per day for the most resistant waste and 0.0170 ± 0.0021 per day for the least resistant waste. The incorporation of these four waste types in the biogas production process had a positive effect on gas formation. Therefore, these organic wastes hold promise as valuable resources for biogas production, addressing both the issue of waste accumulation and the energy crisis in an environmentally beneficial manner.
Investigation of the Rheological Characteristics of Asphalt Modified from Medical Mask Waste Fibers Ananda Putra, I Gusti Agung; Thanaya, I Nyoman Arya; Ariawan, I Made Agus; Ciawi, Yenni
International Journal of Research in Vocational Studies (IJRVOCAS) Vol. 4 No. 1 (2024): IJRVOCAS - April
Publisher : Yayasan Ghalih Pelopor Pendidikan (Ghalih Foundation)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53893/ijrvocas.v4i1.264

Abstract

Masks are essential for preventing people from breathing in dangerous compounds and airborne pollutants. On the other hand, incorrect mask disposal presents a serious environmental risk. Medical masks are mostly made of polypropylene and are formed of three layers: a central layer of melt-blown material, an outer layer of waterproof non-woven fabric, and an interior layer. This research aims to determine the effect of medical mask waste fiber on the rheological characteristics of asphalt. In terms of the rheological characteristics of asphalt, the addition of asphalt will decrease the penetration, ductility, specific gravity, and lost on heating, and increase the viscosity, softening point, and flash point. The positive impact is that the inclusion of mask waste results in increased asphalt hardness, enhancing resistance to rutting. On the other hand, the negative impact is that the inclusion of masking waste will reduce the resistance to cracking due to the reduced elasticity.
Penggunaan Limbah Masker yang Mengandung Polipropilena pada Campuran Aspal Beton Putra, I Gusti Agung Ananda; Thanaya, I Nyoman Arya; Ariawan, I Made Agus; Ciawi, Yenni
Portal: Jurnal Teknik Sipil Vol 15, No 2 (2023): October Edition
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/portal.v15i2.4383

Abstract

Masker adalah perlindungan pernafasan yang digunakan sebagai metode untuk melindungi individu dari menghirup zat-zat bahaya atau kontaminan yang berada di udara. Meskipun masker sangat diperlukan untuk menghindari penyebaran virus Corona, namun pembuangan masker mengancam lingkungan. Masker medis terdiri  dari  tiga  lapisan,  lapisan luar  dan  lapisan  dalam  adalah  kain  non-woven yang tahan  air dan lapisan tengah adalah bahan  yang  meleleh. Sebagian besar, komposisi kimia dari masker medis adalah polipropilena. Pada review ini akan dibahas penggunaan limbah masker yang mengandung polipropilena sebagai bahan aditif dalam pembuatan campuran aspal beton. Metode yang digunakan adalah studi literatur dari peneliti terdahulu dan analisis penambahan limbah masker yang mengandung polipripilena yang berpengaruh terhadap campuran aspal beton. Sumber utama refrensi artikel ini berasal dari Research Gate, Science Direct, dan Google Scholar. Ditemukan bahwa penggunaan limbah masker yang mengandung polipropilena ke dalam campuran aspal beton memenuhi spesifikasi yang berlaku (nilai VIM, VMA, VFA, Stabilitas, dan Flow).
Grafena Oksida dalam Konstruksi: Tinjauan Komprehensif tentang Prospek, Tantangan, dan Perkuatan Semen Berkelanjutan Ciawi, Yenni; Supariarta, Made Adi; Hidayati, Anissa Maria; Tonyes, Silvia Gabrina
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 29, Nomor 1, JULI 2023
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v29i1.55906

Abstract

The growing demand for cement production to support the rapid growth of the construction industry has resulted in a significant contribution to global carbon emissions due to the high energy requirements of cement production. Addressing this issue requires the development of eco-friendly cement modifiers/additives. Graphene, known for its exceptional properties, has emerged as a versatile material in various domains, including construction. Its incorporation into cement has exhibited promising prospects, surpassing geopolymer performance and enhancing cement quality. Nevertheless, challenges persist, such as inadequate dispersion in concrete mixtures and quality control issues during large-scale production. Harnessing the potential of graphene oxide can revolutionize cement performance and contribute to a more sustainable construction industry. Addressing dispersion challenges and ensuring successful large-scale production are pivotal steps towards realizing these benefits. This comprehensive review investigates the potential of graphene oxide in the construction sector, specifically focusing on its capacity to reinforce cementitious composites and highlighting the associated implementation challenges, paving the way for more sustainable cement production with a touch of scientific excellence.
UNSUR SENYAWA KIMIA DARI LIMBAH MASKER MEDIS UNTUK MENINGKATKAN KINERJA CAMPURAN ASPAL Putra, I Gusti Agung Ananda; Thanaya, I Nyoman Arya; Ariawan, I Made Agus; Ciawi, Yenni
Menara: Jurnal Teknik Sipil Vol. 19 No. 1 (2024): Menara : Jurnal Teknik Sipil
Publisher : Teknik Sipil, Fakultas Teknik Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jmenara.v19i1.38940

Abstract

Masker adalah perlindungan pernafasan yang digunakan sebagai metode untuk melindungi individu dari menghirup zat-zat bahaya atau kontaminan yang berada di udara. Meskipun masker sangat diperlukan untuk menghindari penyebaran virus Corona, namun pembuangan masker mengancam lingkungan. Masker medis terdiri dari tiga lapisan, lapisan luar dan lapisan dalam adalah kain non-woven yang tahan air dan lapisan tengah adalah bahan yang meleleh. Sebagian besar, komposisi kimia dari masker medis adalah polipropilena. Pada review ini akan dibahas penggunaan limbah masker yang mengandung polipropilena sebagai bahan aditif dalam pembuatan campuran aspal. Metode yang digunakan adalah studi literatur dari peneliti terdahulu dan analisis penambahan limbah masker yang mengandung polipripilena yang berpengaruh terhadap campuran aspal. Sumber utama refrensi artikel ini berasal dari Research Gate, Science Direct, dan Google Scholar. Ditemukan bahwa unsur senyawa yang paling dominan pada masker medis adalah Si (Silika) sebesar 59,11%. Penambahan silika pada campuran aspal dapat meningkatkan ketahanan terhadap kerusakan alur, peningkatan nilai modulus, dan umur fatigue.
Korosi Mikroba pada Infrastruktur Logam: Tantangan dan Strategi Pengelolaan Berkelanjutan Ciawi, Yenni; Ramona, Yan
Nata Palemahan: Journal of Environmental Engineering Innovations Vol. 1 No. 2 (2024)
Publisher : Universitas Pendidikan Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38043/natapalemahan.v1i2.5652

Abstract

Korosi mikroba (MIC, microbiologically influenced corrosion) merupakan masalah pelik di berbagai industri, khususnya pada sektor minyak dan gas, infrastruktur kelautan, dan pengolahan air, karena aktivitas mikroba mempercepat degradasi permukaan logam secara signifikan. MIC umumnya oleh bakteri, arkea, dan jamur yang membentuk biofilm pada logam, dan menyebabkan reaksi elektrokimia lokal yang memicu korosi. Tinjauan ini berfokus pada mikroorganisme utama yang terlibat dalam MIC, seperti bakteri pereduksi sulfat (SRB, sulfate-reducing bacteria), bakteri pengoksidasi besi (IOB, iron-oxidizing bacteria), dan metanogen, serta menjelaskan bagaimana faktor lingkungan, seperti ketersediaan oksigen, konsentrasi nutrisi, pH, suhu, dan salinitas, mendukung pertumbuhan mikroba dan korosi logam. Berbagai metode deteksi MIC dievaluasi, seperti analisis mikrobiologi, metode elektrokimia seperti spektroskopi impedansi elektrokimia (EIS, electrochemical impedance spectroscopy), metode uji non-destruktif, serta teknologi sensor real-time. Selain itu, strategi mitigasi MIC, seperti penggunaan material tahan korosi, pelapis antimikroba, biosida, dan sistem perlindungan katodik, dibahas secara rinci. Teknologi baru seperti pelapis pintar (self-healing), nanomaterial, dan sistem bioelektrokimia juga disebutkan sebagai solusi menjanjikan untuk pengelolaan MIC yang lebih efektif dan berkelanjutan. Dengan mengintegrasikan metode deteksi dan mitigasi yang canggih, industri dapat melindungi infrastruktur penting dari dampak jangka panjang korosi mikroba dan mengurangi secara signifikan biaya akibat kerusakan oleh MIC.
Co-Authors Anak Agung Gede Indraningrat Ananda Sri Phartiswari Anissa Maria Hidayati AYUB BENNY KRISTIANTO Esti Arisetya Dewi I Dewa Gede Marsta Laksmana I Gusti Agung Ananda Putra I Komang Trisna Satria Pramartha I Made Agus Ariawan I Made Alit Karyawan Salain I Made Dira Swantara I Nyoman Aribudiman I Nyoman Arya Thanaya I Putu Adi Yana I PUTU GUSTAVE SURYANTARA PARIARTHA I W BUDIARSA SUYASA I Wayan Karta I Wayan Redana I.M.A.S. Wijaya Ida Ayu Rai Widhiawati Kadek Diana Harmayani Luh Putu Wrasiati MADE PHARMAWATI Made Rai Rahayu Manuntun Manurung Ni Made Puspawati Ni Made Utami Dwipayanti Ni Putu Widayanti Oka Ratnayani Putu Rahayu Natalia Anggraini Supariarta, Made Adi Tonyes, Silvia Gabrina Tungga , Dionisius WIWIK SUSANAH RITA Yan Ramona Yohanes Armawan Sandi