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Tony Hadibarata
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Industrial and Domestic Waste Management
Published by Tecno Scientifica
ISSN : -     EISSN : 28094255     DOI : https://doi.org/10.53623/idwm.v2i1
Core Subject : Social, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Engineering Environmental Science
The journal is intended to provide a platform for research communities from different disciplines to disseminate, exchange and communicate all aspects of industrial and domestic waste management. The topics of this journal include, but are not limited to: Address waste management policy, education, and economic and environmental assessments Pollution prevention, clean technologies, conservation/recycling/reuse Multicriteria assessment of waste treatment technologies Stakeholder role: technology implementation, future technology management strategies Participatory decision making, integration of policies/research in the waste sector Case studies and environmental impact analysis in the waste sector Air, water, soil, groundwater, radiological pollution, control/management Environmental pollution, prevention/control, waste treatment/management Water and municipal/agricultural/industrial wastewater and waste treatment Solid/hazardous/biosolids/residuals waste, treatment/minimization/disposal/management Environmental quality standards, legislation, regulations, policy Public/environmental health, environmental toxicology, risk assessment Sources/transport/fate of pollutants in the environment; remediation, restoration Mathematical/modelling techniques, case studies
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 15 Documents
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Search results for , issue "volume 6 - issue 2 - 2026" : 15 Documents clear
Applications of Lean Manufacturing to Reduce Waste in the Crumb Rubber Industry Defi Irwansyah; Diana Khairani Sofyan; Muhammad Ashraff
Industrial and Domestic Waste Management Volume 6 - Issue 2 - 2026
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/idwm.v6i2.1333

Abstract

This study focused on reducing waste in rubber powder production using Lean Manufacturing tools and improving process cycle efficiency. A quantitative case study was conducted at PT Perkebunan Nusantara IV Region 1, Gunung Para Plantation, North Sumatra, Indonesia. Waste was identified using the types-of-waste framework and ranked according to its impact on the production process. The selection of appropriate Lean tools was guided by Value Stream Mapping (VSM). The process was analyzed using Current Value Stream Mapping (CVSM), fishbone diagrams, and Future Value Stream Mapping (FVSM). The primary objective was to identify and reduce waste in the crumb rubber production process. The major types of waste identified were waiting time, excess inventory, product defects, and overprocessing. Based on the value stream analysis, several improvement strategies were proposed. The initial process cycle efficiency was 96.26%. After the proposed improvements were applied, particularly those aimed at reducing non-value-added time in the future value stream, process cycle efficiency increased by 1.82 percentage points to 98.08%. In addition, the production lead time decreased from 16,779.32 minutes to 16,467.93 minutes, representing a reduction of 311.39 minutes. The application of Lean Manufacturing and Value Stream Mapping effectively reduced production waste and improved the overall efficiency of the crumb rubber production process.
Development of a Green Palm Oil Agroindustry Model Based on Resource Efficiency and Circular Economy in Medan, Indonesia Kimberly Febrina Kodrat; Hasan Sitorus
Industrial and Domestic Waste Management Volume 6 - Issue 2 - 2026
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/idwm.v6i2.1393

Abstract

Palm oil processing created substantial economic value while intensifying demands for materials, energy, water, and responsible residual management. This study developed and empirically tested a company-level green palm oil agroindustry model that integrated resource efficiency and circular economy practices at PT Musim Mas in Medan City. Explanatory quantitative research was conducted with 50 internal respondents representing management, production and operations, engineering and maintenance, environment and sustainability, quality control, and workers. Data were collected through a five-point Likert-scale questionnaire, observations, interviews, and documentation and were analyzed using descriptive statistics and structural equation modeling–partial least squares (SEM-PLS). The questionnaire results represented internal perceptions of practice implementation and did not constitute direct audited measurements of water consumption, energy use, waste generation, or emissions. The mean scores for resource efficiency, circular economy, and green agroindustry were 3.98 (good), 4.14 (good), and 4.03 (good), respectively. Resource efficiency was positively associated with green agroindustry (β = 0.382; t = 4.216; p < 0.001), circular economy was positively associated with green agroindustry (β = 0.447; t = 5.031; p < 0.001), and resource efficiency was positively associated with circular economy (β = 0.516; t = 6.284; p < 0.001). Together, resource efficiency and circular economy explained 71.4% of the variance in green agroindustry (R² = 0.714). Within the investigated model and sample, circular economy exhibited a stronger standardized direct association with green agroindustry than resource efficiency. The findings were also consistent with a pathway in which efficient resource use facilitated higher-value resource recovery and waste-to-value practices. Water efficiency, emission control, renewable energy utilization, and green technology innovation were identified as priority areas for further improvement. Overall, the findings provided company-level, cross-sectional evidence supporting the integration of resource efficiency and circular economy practices into green palm oil agroindustry development; however, broader replication and longitudinal assessment were required to establish their generalizability and long-term effects.
Technical Capacity Gap against Regional Waste Strategy Targets in Musi Rawas Regency, Indonesia Teddy Laszuardy; Yuwana; Muhamad Mustopa Romdhon; Yansen
Industrial and Domestic Waste Management Volume 6 - Issue 2 - 2026
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/idwm.v6i2.1409

Abstract

Waste management at the regency level is determined not only by the availability of regulations and infrastructure but also by the alignment among waste generation, transport capacity, processing capacity, and policy targets. This study evaluated the technical capacity gap in the waste management system of Musi Rawas Regency against the 2025 Regional Waste Management Policy and Strategy (Jakstrada) targets using a quantitative evaluative approach based on secondary data. Population data for 2020–2025 were used to estimate waste generation through sensitivity analysis using coefficients of 0.30, 0.35, and 0.40 kg/capita/day. The estimates were then compared with the vehicle fleet inventory, daily collection trips, 3R Waste Processing Facilities (TPS 3R), human resources, service routes, and the Jakstrada targets of 30% waste reduction and 70% waste handling. The population increased from 395,570 in 2020 to 415,744 in 2025. Under the moderate scenario, waste generation in 2025 was estimated at 145.51 t/day. The nominal capacity of seven active dump trucks completing a total of eight trips per day was 40 t/day, equivalent to 27.49% of the estimated waste generation and only 39.27% of the capacity required to meet the 70% handling target. This resulted in a nominal capacity gap of 61.86 t/day. Three of the four TPS 3R units were active, but their recorded throughput was only approximately 0.79 t/day, compared with an active design capacity of 4 t/day. The results indicated that regulatory readiness had not yet been fully supported by adequate technical capacity and facility utilization. Based on the identified gaps, the most appropriate policy measures included strengthening tonnage-based operational records, optimizing collection routes and trip frequencies, revitalizing TPS 3R facilities, integrating waste banks into the waste management system, expanding decentralized organic waste treatment, and upgrading final disposal standards.
Valorization of Water Hyacinth and Banana Pseudostem through Co-Composting with Goat Manure: Effects of Biomass Ratio on Macronutrient Quality Agus Widada; Muh Gazali; Yusmidiarti; Budi Utomo; Hesti Sembiring
Industrial and Domestic Waste Management Volume 6 - Issue 2 - 2026
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/idwm.v6i2.1416

Abstract

Water hyacinth and banana pseudostem are abundant aquatic and agricultural biomasses with contrasting physicochemical properties that may provide complementary nutrient and carbon sources during composting. However, the effects of progressively substituting lignocellulosic banana pseudostem with nutrient-rich water hyacinth under a constant manure input remain insufficiently understood. This study evaluated how different water hyacinth–banana pseudostem ratios influence the nutrient composition and C/N characteristics of compost. Four 6-kg feedstock formulations were investigated: X1 (4 kg banana pseudostem + 1 kg water hyacinth + 1 kg goat manure), X2 (3 + 2 + 1 kg), X3 (2 + 3 + 1 kg), and X4 (1 + 4 + 1 kg), using five independent 90-L composting units per formulation (n = 20). The mixtures were composted for 30 days and turned every two days. Total N, P, and K, organic C, and C/N ratio were determined at the end of composting. Feedstock formulation significantly affected total P (F(3,16) = 6.583, p = 0.004, η² = 0.552), with the highest concentration observed in X2 (0.794 ± 0.167%). Total N and K were numerically highest in X3, although differences among formulations were not statistically significant (p = 0.091 and p = 0.095, respectively). Organic C (p = 0.816) and C/N ratio (p = 0.256) also showed no significant differences, with mean C/N ratios ranging from 11.04 to 12.87. In contrast, aggregate N + P₂O₅ + K₂O differed significantly among formulations (F(3,16) = 10.255, p < 0.001, η² = 0.658), with X2, X3, and X4 exceeding X1 but not differing significantly from one another. These findings reveal a threshold-type rather than monotonic nutrient response, indicating that increasing water hyacinth beyond the X2 proportion did not produce proportional improvements in aggregate nutrient content. Co-composting water hyacinth, banana pseudostem, and goat manure therefore provides a promising nutrient-recovery strategy for managing invasive aquatic biomass and agricultural residues, although maturity assessment, contaminant screening, and soil–plant validation are required before field-scale application.
Pollution Constraints on Raw-Water Security in the Air Bengkulu Watershed: Linking Water-Quality Exceedances, Pollutant Loads, and Service Delivery Riang Adeko; Yudhi Harini Bertham; Wahyudi Arianto; Khairul Amri
Industrial and Domestic Waste Management Volume 6 - Issue 2 - 2026
Publisher : Tecno Scientifica Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53623/idwm.v6i2.1430

Abstract

Raw-water security in urban watersheds depends on the interaction among hydrological potential, source-water quality, and the capacity of water-supply systems to deliver reliable services. This study developed a source-to-service diagnostic framework for the Air Bengkulu Watershed, Indonesia, integrating 90% dependable flow (Q90), normative domestic water demand, actual piped-water delivery, regulatory water-quality exceedances, and event-based pollutant transport. The results showed that dependable flow substantially exceeded normative domestic water demand, whereas actual household piped-water delivery accounted for only 38.0% of the estimated demand. This ratio was interpreted as an indicator of service delivery relative to planning requirements rather than a measure of household coverage or total water availability. Across three monitoring campaigns conducted in 2025, downstream water quality consistently exceeded Class II regulatory thresholds for organic pollutants, nutrients, oil and grease, and faecal contamination indicators. Event-based calculations further demonstrated that pollutant transport varied substantially with river discharge, highlighting the limitations of assessing pollution solely through concentration measurements. The main novelty of this study lies in integrating hydrological potential, pollutant loads, flow-dependent transport, and actual water-service delivery within a unified source-to-service assessment framework. The findings emphasize the importance of risk-based pollution control, flow-synchronized water-quality monitoring, improved intake management, and treatment preparedness. The proposed framework supports more informed water-resource management without assuming that all dependable river flow is directly available for abstraction, treatment, or household distribution.

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