Article Per Year (5 Year)
p-Index From 2021 - 2026
1.288
P-Index
This Author published in this journals
All Journal Ecotrophic, Journal of Environmental Science Jurnal Ilmiah Manajemen Kesatuan Jurnal Ilmiah Satyagraha Jurnal Ecocentrism Jurnal Ilmiah Teknik Unmas (Jitumas) Denpasar
I Kadek Widiantara
Udayana University
Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Energy Engineering Environmental Science Social Sciences Transportation

Published : 8 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 8 Documents
Search

 1 
IMPLEMENTASI BIOSISTEM UNTUK PENGOLAHAN AIR LIMBAH LAUNDRY i kadek widiantara; I Wayan Budiarsa Suyasa; I Wayan Diara
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 12 No 1 (2018)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (163.286 KB) | DOI: 10.24843/EJES.2018.v12.i01.p04

Abstract

Population growth followed by an increase in laundry activity generates waste if left unchecked will cause damage to aquatic biota. To overcome this need the existence of an environmentally benign laundry water treatment system such as biosystem. Biosystem used in this research with length 180 cm width 60 cm and height 40 cm filled gravel as filter media and elephant grass (pennisetum purpureum) plant. The way of operating the biosystem is by pouring the waste into a tub of biosystem and then samples waste water taken on the biosystem output. The result treatment that biosystems combined with anaerobic reservoirs decreased BOD, COD, phosphate and detergent levels by 127.09 mg/l, 161.96 mg/l, 0.8699 mg/l and 1.3228 mg/l in a single treatment on roughing horizontal flow filter for laundry water treatment. The performance of physical and biological components in biosystems combined with anaerobic reservoir effectively decreased BOD, COD, phosphate and detergent concentrations by 73.91%, 69.58%, 58.74% and 80.03% (above 50%) in one treatment. But only in lowering the effectiveness of phosphate levels is still relatively low when compared with the effectiveness of wastewater quality standards. Further research needs to be done calculations to find plants in biosystems that can thrive. In addition, further research is needed to find the operating time until the biosystem undergoes a breaktrough condition. Keywords: laundry, waste water, biosystem.
LIMBAH LUMPUR INDUSTRI PENGOLAHAN BAJA SEBAGAI PENGGANTI PARSIAL PASIR UNTUK BAHAN BANGUNAN Darmayasa, I Gede Oka; Widiantara, I Kadek
Jurnal Ecocentrism Vol. 4 No. 1 (2024): Jurnal Ecocentrism
Publisher : Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Mahasaraswati Denpasar, Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This research involves the binding/solidification of sludge waste from the steel processing industry originating from a steel industry in West Java, namely sludge waste from the waste processing process of the iron sponge production unit (direct reduction plant) and the wire rod mill production unit using cement as the binding material in the concrete mixture. The binding of sludge waste is carried out on a laboratory scale with mixture proportions of 0, 10, 20, 30, and 40% sludge waste substitution for fine aggregate/sand. Laboratory tests on the mixture include compressive strength, elastic modulus and Poisson ratio, concrete density, permeability, environmental resistance, and leaching tests with TCLP (toxicity characteristic leaching procedure). Heavy metal leaching tests for Pb, Cd, and Zn have the highest values at a 40% mixture proportion, which are 0.065 mg/ltd, 0.234 mg/lt, values below the quality standard limits for these heavy metals, which are 5.0 mg/lt, 1.0 mg/ltd, and 50 mg/lt, respectively. Environmental resistance tests indicate that the mixture has sufficient resistance after testing through 13 cycles, with the highest weight loss in the mixture sample being 13.97%, a value below the established quality standard where the maximum weight loss is 30%.
Enhancing Service Quality Through Innovation: A Study of Sucofindo Indonesia's Strategies in Global Competition Sugiantari, I Gusti Ayu Dwi Ardiani; Merta, I Ketut; Widiantara, I Kadek
Jurnal Ilmiah Manajemen Kesatuan Vol. 12 No. 5 (2024): JIMKES Edisi September 2024
Publisher : LPPM Institut Bisnis dan Informatika Kesatuan

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aims to test the service innovation of Sucofindo Indonesia in improving service quality as an effort to maintain firm sustainability in the era of globalization, using the grand theory of Human resource management and supporting marketing management theory applied theory of service innovation, service quality and firm sustainability. This research method uses an associative quantitative method, and a questionnaire with a population of 102 and a sampling sample of 46 using the slovin formula with four hypotheses and data processing using SPSS Version 24. The results of the study found 1. Service Quality has a positive and significant effect on Firm sustainability, 2. Service Quality has a positive and significant effect on service innovation 3. Firm sustainability has a positive and significant effect on service innovation . 4. Firm sustainability, is able to mediate service quality, against service innovation. The implications of this study produce service quality, service innovation, and firm sustainability of Sucofindo Indonesia are quite moderate and indicate that firm sustainability can mediate service quality in service innovation.
PERAN STRES KERJA DAN LINGKUNGAN KERJA TERHADAP TURNOVER KARYAWAN QUEST HOTEL KUTA BADUNG - BALI Widiantara, I Kadek; Juliasa, Made; Indiani, Ni Luh; Rajendra, Putu Rana
Jurnal Ilmiah Satyagraha Vol. 8 No. 2 (2025): Jurnal Ilmiah Satyagraha
Publisher : Universitas Mahendradatta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47532/110f0081

Abstract

Abstract This study aims to determine the effect of the role of the work environment and work stress on employee Turnover at Quest Hotel Kuta. This research was prepared descriptively using quantitative approach methods. In this study, the data collection instrument is in the form of a questionnaire to obtain information about a number of respondents representing a certain population which will then be carried out statistical data analysis (SPSS) to test the hypothesis that has been proposed. The results of this study found that work stress and work environment have a partial and simultaneous effect on employee Turnover at Quest Hotel Kuta Badung – Bali. From the results of the t test, calculate 2.931 > 1.985 and sig 0.006 < 0.05, meaning that Work Stress has a positive effect on Employee Turnover at Quest Hotel Kuta, Badung – Bali. For t results, calculate -2.392 > 1.985 and sig 0.022 < 0.05, meaning that the Work Environment negatively affects Employee Turnover at Quest Hotel Kuta, Badung – Bali. While the results of f calculate 106.928 > 3.09 and sig 0.000 < 0.05 means that Work Stress, Work Environment and Turnover Employee intension affect jointly (simultaneously) on Employee Performance Quest Hotel Kuta, Badung – Bali Keywords: work stress, work environment, employee performance.   Abstrak Penelitian ini bertujuan untuk mengetahui pengaruh peran lingkungan kerja dan stress kerja terhadap Turnover karyawan di Quest Hotel Kuta Badung- Bali. Penelitian ini disusun secara deskriptif dengan menggunakan metode pendekatan kuantitatif. Dalam penelitian ini instrumen pengumpulan data berupa kuesioner untuk mendapatkan informasi tentang sejumlah responden yang mewakili populasi tertentu yang kemudian akan dilakukan analisis data secara statistik (SPSS) untuk menguji hipotesis yang telah diajukan. Hasil dari penelitian ini ditemukan bahwa stress kerja dan lingkungan kerja berpengaruh secara parsial dan simultan terhadap Turnover karyawan pada Quest Hotel Kuta Badung- Bali. Dari hasil uji t hitung 2,931 > 1,985 dan sig 0,006 < 0,05 artinya Stres Kerja berpengaruh positif terhadap Turnover Karyawan pada Quest Hotel Kuta Badung- Bali. Untuk hasil t hitung -2,392 > 1,985 dan sig 0,022 < 0,05 artinya Lingkungan Kerja berpengaruh negatif terhadap Turnover Karyawan pada Quest Hotel Kuta Badung- Bali. Sementara hasil dari f hitung 106,928 > 3,09 dan sig 0,000 < 0,05 artinya Stres Kerja, Lingkungan Kerja dan Turnover Intension karyawan berpengaruh secara bersama-sama (simultan) terhadap Kinerja Karyawan Quest Hotel Kuta Badung- Bali Kata kunci: stress kerja, lingkungan kerja, kinerja karyawan.
PERBANDINGAN KARAKTERISTIK DAUN SINGKONG DI DAERAH RAWAN KEMACETAN DENGAN DAERAH TIDAK RAWAN KEMACETAN Widiantara, I Kadek; Sri Anjani, Ida Ayu Anggara; Dale, Emanuel; Quivera Nanggor, Arnoldus Patrik
Jurnal Ecocentrism Vol. 5 No. 2 (2025): Jurnal Ecocentrism
Publisher : Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Mahasaraswati Denpasar, Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36733/jeco.v5i2.12063

Abstract

The increasing number of motor vehicles each year has led to worsening air quality, with vehicle emissions being a major source of urban air pollution. This study aims to examine and compare the characteristics of cassava leaves growing in areas prone to traffic congestion. High pollution levels contribute to noticeable changes on the leaf surfaces. The research was conducted by collecting two leaf samples from different locations: (1) a roadside with heavy vehicle traffic and (2) a privately owned garden. The observed parameters included leaf color, texture, and the underside of the leaves. The results showed that cassava leaves exposed to high pollution levels experienced color changes (yellowish spots on the surface), rougher textures, and the presence of black dots or dirt particles on the underside, resembling vehicle emission residues. In contrast, leaves collected from the garden appeared unaffected by such conditions. These findings confirm that vehicle emissions significantly impact the characteristics of plant leaves.
ANALISIS EFEKTIVITAS UNIT KOLAM AERASI BERDASARKAN ASPEK TEKNIS PADA INSTALASI PENGOLAHAN AIR LIMBAH SUWUNG DENPASAR Wulantari, Sagung Anggun Istri; Widiantara, I Kadek; Wahyu Wijaya, I Made
Jurnal Ecocentrism Vol. 5 No. 2 (2025): Jurnal Ecocentrism
Publisher : Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Mahasaraswati Denpasar, Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36733/jeco.v5i2.12542

Abstract

The government has built a Wastewater Treatment Plant (WWTP) to reduce environmental pollution. Suwung WWTP is a liquid waste treatment unit constructed using an aerated lagoon and sedimentation pond system to treat household wastewater in the areas around Denpasar, Sanur, and Kuta. The purpose of this study is to understand the technical design of the aerated lagoon unit at Suwung WWTP in Denpasar. This study uses a comparison of aerated lagoon design criteria with existing data from the aerated lagoon at Suwung WWTP. The study results on the quality of influent and effluent from the aeration ponds at Suwung WWTP have met quality standards according to the Bali Governor Regulation Number 16 of 2016 regarding BOD, TSS, pH, and DO parameters. The effectiveness of BOD removal in aerated lagoon I was 34.04% and in aerated lagoon II was 24.68%, while the TSS removal in aerated lagoon I was 23.72% and in aerated lagoon II was 11.68%. The existing aerated lagoon design complies with the design criteria indicators for aerobic flow through as per Annex II of PUPR Regulation No. 04 of 2017.
ANALISIS KONDISI PENGELOLAAN SAMPAH BERKELANJUTAN DI TPA TEMESI GIANYAR Reda Mata, Alfret Lango; Widiantara, I Kadek; Wahyu Wijaya, I Made
Jurnal Ecocentrism Vol. 6 No. 1 (2026): Jurnal Ecocentrism
Publisher : Program Studi Teknik Lingkungan, Fakultas Teknik, Universitas Mahasaraswati Denpasar, Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36733/jeco.v6i1.13779

Abstract

Sustainable waste management has become a highly strategic issue in Gianyar Regency, Bali, in line with the increasing volume of waste generation and the limited capacity of final disposal sites. This study aims to analyze the existing conditions and performance of waste management at the Temesi landfill based on technical, environmental, economic, and social aspects. The method employed is a descriptive-quantitative approach, involving field observations, interviews with site managers, documentation of operational data from January to May 2025, and mass balance analysis. The results indicate that the total waste generation reached 30,964 tons, with an average of 213.54 tons per day, predominantly composed of organic waste. Approximately 50.16% of the waste is processed into compost, 11.08% is recycled, and 38.76% remains as residual waste disposed of in the landfill. The material recovery rate has reached 61%, indicating that the system is moving toward the implementation of circular economy principles. Economically, the waste bank operation generates a surplus of IDR 149,933,210. However, environmental aspects remain a major challenge, particularly due to the suboptimal leachate treatment system, which poses a potential risk of environmental pollution. Furthermore, improvements in technological capacity and community participation are required to support more sustainable waste management.
STRATEGI PENINGKATAN EFEKTIVITAS PENGELOLAAN SAMPAH BERKELANJUTAN DI TPA TEMESI Widiantara, I Kadek; Reda Mata, Alfret Lango; Wahyu Wijaya, I Made
Jurnal Ilmiah Teknik Universitas Mahasaraswati Denpasar (JITUMAS) Vol. 6 No. 1 (2026): Jurnal Ilmiah Teknik Unmas (Jitumas) Denpasar
Publisher : Fakultas Teknik Universitas Mahasaraswati Denpasar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36733/jitumas.v6i1.13774

Abstract

Peningkatan timbulan sampah dan keterbatasan kapasitas landfill menuntut strategi pengelolaan yang lebih efektif dan berkelanjutan. Penelitian ini bertujuan merumuskan strategi peningkatan efektivitas pengelolaan sampah berkelanjutan berdasarkan kondisi operasional eksisting. Data periode Januari–Mei 2025 menunjukkan total timbulan sampah sebesar 30.964 ton dengan rata-rata 213,54 ton/hari. Analisis mass balance menunjukkan 15.482 ton (50%) diolah menjadi kompos, 3.406 ton (11%) didaur ulang, dan 12.076 ton (39%) menjadi residu landfill dengan tingkat pemulihan material sebesar 61%. Pendekatan penelitian menggunakan metode deskriptif kuantitatif dan evaluatif berdasarkan aspek teknis, ekonomi, dan lingkungan. Hasil penelitian menunjukkan bahwa efektivitas sistem masih dibatasi oleh tingginya residu dan belum optimalnya pengolahan lindi. Strategi peningkatan difokuskan pada optimalisasi pemilahan di sumber, revitalisasi instalasi pengolahan lindi, pemanfaatan residu menjadi Refuse Derived Fuel (RDF), serta penguatan sistem ekonomi sirkular. Strategi terintegrasi tersebut diproyeksikan mampu meningkatkan recovery rate di atas 70% dan memperkuat keberlanjutan operasional.  
Co-Authors Dale, Emanuel I Gede Oka Darmayasa I Made Wahyu Wijaya I W BUDIARSA SUYASA I Wayan Diara Indiani, Ni Luh Made Juliasa Merta, I Ketut Quivera Nanggor, Arnoldus Patrik Rajendra, Putu Rana Reda Mata, Alfret Lango Sri Anjani, Ida Ayu Anggara Sugiantari, I Gusti Ayu Dwi Ardiani Wulantari, Sagung Anggun Istri