bluuebunny/crossref_metadata_2025_split huggingface dataset:
Noise intensity analysis of building construction projects: a case study
Authors: Hatmoko J U D , Yuwono A A , Pradana R Y A , Kistiani F 
Published: December 2024

Abstract
Construction projects come with a variety of equipment that produce a variety of noise levels, this equipment has the potential to produce high noise levels that can impact people’s health in various ways. These effects include damage to the sense of hearing both temporarily and permanently, communication disorders, and physiological impacts. This study aims to analyze construction project noise involving construction equipment. This study identifies and classifies construction equipment that produces noise with a total of 16 pieces of construction equipment; 2 with high noise intensity; 5 with medium noise intensity; 9 with low noise intensity. The analysis used the calculation of the average noise intensity level normalized to 8 hours (Lex) so that finally a uniform classification can be made. In addition, this study also develops a plan for noise mitigation and control methods of noise that exceed the threshold value.
Indoor air quality in the university classroom: An experiment and simulation analysis in a tropical climate
Authors: Anugerah D R D , Sari D P , Harsritanto B I R 
Published: December 2024

Abstract
A comfortable classroom environment depends heavily on indoor air quality to maximise productivity and performance. This statement refers to the preliminary survey indicating that most university students spend 90% of their time inside buildings. Each day, between three and six hours are spent in the classroom. However, most classrooms today are equipped with AC units, which restrict air exchange. A major reason is the high temperatures, especially in tropical climates. Overly high CO2 concentrations will have a negative effect on health. The purpose of this research is to identify the indoor air quality of Classroom A.202, Department of Architecture, Diponegoro University, focusing particularly on CO2 concentrations. A combination of experiments and simulations is used in the method. For 10 minutes, an Air Quality Monitor and CONTAM simulation software were used to measure and simulate window openings and occupant movements. The results show that CO2 concentration levels increase as occupants in a room increase and air circulation becomes obstructed. It was found that good air circulation can lower CO2 levels, resulting in an optimal learning environment.
Charting the currents of environmental concern: a decades-spanning scientometric analysis of riverine debris
Authors: Sani M T , Budihardjo M A , Sarminingsih A 
Published: December 2024

Abstract
Debris in water bodies, particularly rivers, is a major environmental concern, with Southeast Asia contributing around a third of global debris pollution in 2015. This debris poses severe ecological risks, including entanglement and ingestion, which can lead to biodiversity loss. Despite extensive research on marine debris, there has been a lack of scientometric reviews using tools like CiteSpace to analyze riverine debris, especially in Southeast Asia. Thus, this study aims to explore research trends on riverine debris by analyzing Scopus-indexed articles from 1995 to 2024, identifying 156 relevant articles and exploring the monitoring effort. CiteSpace analysis reveals that Indonesia leads Southeast Asia in riverine debris research with 79 publications, followed by Malaysia, Thailand, and Vietnam. The studies primarily span Environmental Science, Earth and Planetary Sciences, and Agricultural and Biological Sciences. Key research has been conducted in Indonesia, Vietnam, and the Philippines, emphasizing the urgent need for improved waste management. These studies focus on debris composition, the effects of increased plastic use during the COVID-19 pandemic, and future waste projections, underscoring the need for targeted interventions to address environmental impact.
Critical review of jatibarang reservoir management in semarang city: an institutional perspective
Authors: Margono A B , Hadi S P. , Hidayat J W 
Published: December 2024

Abstract
This review critically examines the management of Jatibarang Reservoir in Semarang City from an institutional perspective, highlighting key challenges and proposing strategic improvements. The reservoir plays a vital role in water supply, flood control, and environmental enhancement, yet faces significant issues such as sedimentation, erosion, policy fragmentation, and inadequate institutional coordination. Through an analysis of global best practices and innovative management strategies, this review underscores the importance of robust institutional frameworks, stakeholder collaboration, and advanced technologies in enhancing reservoir management. Recommendations include the establishment of a centralized authority for better coordination, the integration of community and private sector efforts, and the adoption advanced sediment management techniques. These measures are critical for ensuring the sustainability of Jatibarang Reservoir and contribute to broader Sustainable Development Goals (SDGs) in urban water management.
The utilization of exopolysaccharide (EPS) from microalgae Chlorella vulgaris in microplastic removal
Authors: Joelyna F A , Hadiyanto  , Khoironi A , Pratama W D 
Published: December 2024

Abstract
The most common plastic kinds detected in aquatic systems are polypropylene (PP) and polyethylene terephthalate (PET), which are the microplastics employed in this investigation. This study aims to determine the ability of microalgae to remove microplastics. Because they contain chemicals and additives, microplastics have an influence on microalgae growth. Exopolysaccharide (EPS), an extracellular molecule, is produced by Chlorella vulgaris. Exopolysaccharide (EPS) is used in the hetero-aggregation process to generate flocs, which facilitates the removal of microplastic. Both internal and external factors influence the production of microalgal EPS. The interaction between microplastics and microalgae, used at 1000 mg/L, is one of the external influences. Every two days, the optical density (OD) of microalgae is measured to determine the growth rate of Chlorella vulgaris. We calculated and determined the dissolved EPS gravimetrically as dry EPS (mg/ml). Flocs were created as a result of the hetero-aggregation of microplastics, EPS, and Chlorella vulgaris. The documentation of floc formation and EPS weight shows that the polyethylene terephthalate (PET) microplastic type removed the most microplastics using exopolysaccharide. The dry weight of the exopolysaccharide (EPS) Chlorella vulgaris control was 735 mg/L, the polypropylene (PP) treatment was 835 mg/mL, and the polyethylene terephthalate treatment was 1034 mg/mL.
Centralized Automatic Greasing with Intelligent Notification to Maximize Reliability and Hazardous Waste Reduction in Combined Cycle Power Plant
Authors: Kurniawan A , Danaputra F I , Putra P D , Fatimah F , Rahmanissa A 
Published: December 2024

Abstract
Cooling water system on Steam Turbine Generator is affected by sea water cleanliness. Traveling Drum Screen (TDS) is used to filter trash and rubbish from the sea water before entering cooling water system in a Power plant. From 2018 to 2022, the Pinion Gear on the Traveling Drum Screen had been damaged many times with an average of 6 times per year and had potential loss of IDR 2.8 billion. From the inspection results, damage occurred on support bearing due to uneven lubrication entering the bearing housing. The lubrication process was conducted manually and produced hazardous waste. This study aims to analyse how to change the system to become digitally maintain and produce less waste. The systematic methodology and implementation of the new system will be explained on this article. The method of this study can increase the optimization of the greasing system and TDS reliability by 2.43×10−3. It also cuts corrective maintenance out. The application of the changed system impact to minimize manual action work and usage of absorbent pad. The results of this research are reducing contaminated hazardous waste and saving hazardous waste management cost.
Promoting green-pesantren and circular economy; Improving santri’s knowledge on food waste management and maggot cultivation
Authors: Nurkhin A , Martono S , Fachrurrozie F , Mukhibad H , Rohman A , Prabowo W T J , Rofiq A 
Published: December 2024

Abstract
The issue of green-pesantren or eco-pesantren is increasingly important to be realized by pondok pesantren by managing the pesantren environment to be cleaner and greener and increasing the knowledge of santri (student) in environmental issues, including in waste management. This research aims to test the effectiveness of waste management and maggot cultivation education and training on santri’s knowledge. An experimental research model is used to analyze the impact of the treatment given, namely education and training for santri. The data collection methods used were tests and observations. The data analysis method used is descriptive statistics and t-tests. The research was conducted at Pondok Pesantren As Salafy Al Asror Semarang, involving 30 santri in May 2024. The study results showed that santri’s knowledge in managing food waste and cultivating maggots still needed to be higher. The education and training significantly increased students’ knowledge of food waste management and maggot cultivation. Students are expected to be able to follow up on the training provided by carrying out maggot cultivation in the pondok pesantren environment or respective places of residence.
Biodegradation of polyethylene terephthalate (PET) plastics using a combination of Aspergillus niger and Trichoderma harzianum
Authors: Tegariyanto M R , Titah H S , Pratikno H 
Published: December 2024

Abstract
Plastic is a synthetic organic polymer widely used across various industries, yet its waste contributes significantly to environmental pollution. Polyethylene terephthalate (PET) is one of the most common types of plastic, known for its resistance to degradation, which poses significant environmental risks. This study aimed to evaluate the biodegradation potential of a combination of Aspergillus niger and Trichoderma harzianum fungi on PET. The fungi were isolated using potato dextrose agar (PDA) and incubated in potato dextrose broth (PDB) to establish growth curves and prepare inocula. PET samples were sterilized and subjected to biodegradation tests in minimal salt medium (MSM) with 10% and 15% fungal inoculations over 30 days. The results revealed significant physical alterations in PET, including color changes, surface curvature, and scratches. Weight loss measurements indicated that the combination of A. niger and T. harzianum achieved 1.80% degradation with 10% inoculation and 1.13% with 15% inoculation. Furthermore, Fourier-transform infrared spectroscopy (FTIR) analysis demonstrated significant changes in functional groups, including the formation of new hydroxyl, carboxylic acid, and alkene groups, indicating polymer chain breakdown. This study highlights the novel application of fungal consortia in PET biodegradation and underscores its potential as a sustainable approach for managing PET plastic waste.
Analysis of soil bearing capacity to determine foundation design in Ngawi City, Indonesia
Authors: Widiarso DA , Huda LN , Trisnawati D , Hidayatillah AS , Adibah NN 
Published: December 2024

Abstract
Improving economic value in a region can be achieved through planned infrastructure support. As one of the biggest shopping centers, Ngawi Big Market has revitalization activity. Before beginning the revitalization process, it is crucial to test the ability of soil to withstand the load, which is called the soil bearing capacity. In the process of this research, the analysis was carried out by evaluating geological and geotechnical conditions, and calculations of soil bearing capacity values. Analysis of soil bearing capacity value was using NSPT data which uses the equation from Luciano Decourt along data from laboratory tests. The lithology of the research area consists of siltstone, and the drilling results consist of silt, fine sand and clay. The land area of Ngawi Big Market is 15,000m2 with the building area of the previous market being 14,500m2. The permitted lowest bearing capacity is at point BH-T3, namely 6.7 tons at a depth of 2.0 meters, while the highest is at point BH-T1, namely 380.3 tons at a depth of 20.00 meters. Based on the results of the analysis, Ngawi Big Market’s revitalization project recommended to carry out the geotechnical engineering to strengthen the soil as well as detailed calculations of building loads so that they do not exceed the permitted bearing capacity.
The effect of fenton oxidation on the quality of pharmaceutical industry wastewater: a case study of bod, cod, toc, and turbidity parameters
Authors: Zaman B , Hardyanti N , Pramesti I A , William G S 
Published: December 2024

Abstract
Chemical residues from pharmaceutical manufacturing processes possess the potential to pollute the environment, particularly the aquatic ecosystem. Environmental indicators include COD, BOD, TOC, and turbidity levels that exceed limits set by regulations. This research is focused on investigating fluctuations in the quantities of wastewater contaminant parameters from pharmaceutical manufacturing facilities before and after treatment with the fenton oxidation method, as well as examining the effectiveness of the fenton oxidation process on water quality using predetermined parameters. This study involves independent variables that included various dosages of Fe2+ and H2O2. Adjusting the pH of the water after stirring to 7 stimulates the flocculation process, which effectively eliminates contaminants, specifically variant 15g FeSO4 and 100 ml H2O2 which successfully lowers turbidity by 99.55%, reduces BOD by 60%, COD removal by 98.69%, and reduces TOC by 92.94%. Control variables include initial contaminant amount, pH, temperature and pressure, fenton oxidation process duration, and instrument conditions.
Analysis of domestic waste generation in one of residential areas on Srondol Wetan Sub-districts, Banyumanik District, Semarang City
Authors: Nugraha W D , Samadikun B P , Damanik E Y , Salsabila G F D , Fikriana H K 
Published: December 2024

Abstract
The more densely populated an area is, the greater the waste produced. One of the residential areas in the Banyumanik District, Semarang City with a relatively high population density is in RW 07 Srondol Wetan Sub-district. Therefore, a study was conducted to determine the amount of waste generated, the volume, and the composition in RW 07 Srondol Wetan Sub-district by implementing waste sampling that refers to SNI 19-3964-1994. Other data collection was carried out by observing and conducting surveys. The samples range from low, middle, to high-income housing. Based on the result, the weight of waste generation in RW 07 Srondol Wetan Sub-district is 0.2836 kg/person/day, and the volume of waste generation is 2.9333 liter/person/day. The composition of the waste generated consists of 61.90% food waste, 11.63% plastic, 6.41% paper or cardboard, 12.26% leaves and wood, 0.93% fabric, 0.37% metal, 0.42% glass, 0.02% rubber, and 6.06% other waste. Based on observations and interviews, most of the waste is collected and transported by collectors and then disposed of directly to the nearest TPS. Meanwhile, waste sorting is only carried out on organic waste and only a few residents process waste using the composting method. Some residents have already done waste management in the form of collecting and selling valuable waste, which is a good indication of the need for a waste bank in the area.
Mitigating membrane fouling in potable water supply by employing the ozonation process
Authors: Istirokhatun T , Susanto H , Andarani P , Sarminingsih A , Filardli A M I 
Published: December 2024

Abstract
Dealing with membrane fouling poses multiple difficulties. Conventional cleaning techniques, such as backwashing and chemical cleaning, are frequently inadequate in effectively dealing with various types of fouling and can result in the gradual deterioration of the membrane. Advanced technologies such as ozone treatment and advanced oxidation processes present interesting answers, but they necessitate meticulous optimisation and can incur significant costs. It is crucial to develop membrane materials that are resistant to fouling and to create monitoring and control systems that operate in real-time in order to enhance fouling management. It is essential to overcome these problems in order to improve the performance, cost-effectiveness, and sustainability of membrane-based water treatment systems used in the production of drinking water. This paper overviews the role of ozonation when it is coupled with membrane process. In general, ozonation as pretreatment and/or post treatment and its mechanism in fouling mitigation, investigation of elimination mechanism of natural organic matter (NOM) and bio-toxicity in the ozonation process, and the prospect of ozonation to be used in fouling mitigation of membrane process for potable water reuse.
The effect of additive compound in self-compacting geopolymer mortar on the compressive and flexural strength
Authors: Hidayat B A , Indriyantho B R , Purwanto  , Prasetya B H , Priastiwi Y A , Pratama R , Anjani B R 
Published: December 2024

Abstract
Using geopolymer materials in concrete manufacturing has been found to lead to inconsistent and variable quality, mostly because of its low workability. Further research was undertaken to improve the workability of self-compacting geopolymers by additional examination. This study aims to assess the influence of different additives on the mechanical properties of self-compacting geopolymer concrete, specifically in relation to its compressive and flexural strength. The compressive and flexural strength of geopolymer mortar was assessed after 28 days of curing, during which it was covered with a thin film layer. Cube and beam specimens were used for testing. The findings suggest that the inclusion of additives in the geopolymer mortar yields compressive strength similar to that of conventional mortar, except in cases when extra water is introduced, leading to a decrease in compressive strength compared to traditional mortar. Moreover, the use of additional cement results in a 1.29-fold enhancement in flexural strength when compared to geopolymer mortar.
Geological Condition Characterization and Coal Resource Estimation at the “KJG” Pit of PT Bukit Asam Tbk, Muara Enim Regency, South Sumatra Province
Authors: Pangestu A R , Adni A , Fahrudin  , Qadaryati N , Zulkarnain D A 
Published: December 2024

Abstract
Coal is a conventional energy source found in tropical countries (e.g., Indonesia) with varying distribution and thickness in the South Sumatra Basin. However, the thickness of the coal seams was not evenly distributed. This affected the estimation of coal resources in the mining area of PT Bukit Asam Tbk in Tanjung Enim, Muara Enim Regency. We used field observation methods and borehole data analysis to determine the geological conditions and estimate the coal resources. The geological condition seems to indicate a claystone unit with tuffaceous sandstone interbeds and a sandstone unit with claystone interbeds. These two units might host coal seams (i.e., A1, A2, B1, B2, and C), where the coal seam thickness may determine increased towards the south and west in the study area. The coal resource estimation based on the SNI 5015: 2019 classification, under moderate geological conditions, can result in a total of 26.034.991 tonnes of measured resources, 25.209.688 tonnes of indicated resources, and 11.189.554 tonnes of inferred resources. Therefore, to ensure efficient coal mining in accordance with the measured reserves, the stripmining method may be used by the company.
Optimizing green building practices: a case study in psychology building of universitas diponegoro in semarang, indonesia
Authors: Nindita Velma , Purwanto Purwanto , Windarta Jaka , Setyowati Erni 
Published: December 2024

Abstract
Buildings have a significant impact on environmental deterioration and climate change. It is crucial to design ecologically friendly and energy-efficient buildings to reduce these effects. Green construction concepts place high importance on using resources efficiently, minimizing waste emissions, and using sustainable materials over the whole lifespan of a structure. The building envelope, which includes walls, doors, windows, floors, and roofs, plays a crucial role in energy-efficient design. This study aims to achieve green building certification for the Universitas Diponegoro (UNDIP) Psychology campus by examining heat transmission, adherence to local green building rules, and energy consumption in current building designs. The study assessed the campus using SketchUp software for design, an overall thermal transfer value (OTTV) calculator, and EDGE (Excellence in Design for Greater Efficiencies) software for analysis. The analysis showed that the OTTV value was 27.58 watts/m2 and the ultimate energy consumption was 41,028.43 kWh/month.
The findings suggest that the campus is following Semarang Mayor’s regulation No. 24 of 2019 and is regarded to be ecologically friendly. Optimization of EDGE design solutions for energy analysis resulted in energy efficiency of 60.6%. The study presents alternative architectural plans that fulfill the requirements of green building standards, providing valuable information on techniques for renovating existing structures.
Climate change adaptation strategy of agricultural sector in Southeast Asia
Authors: Nurjati Eka , Adityawati Septian 
Published: December 2024

Abstract
Tropical regions such as Southeast Asia are more vulnerable to food insecurity because climate change causes disruptions in the food supply chain. An extreme increase in the population exacerbates this condition. Southeast Asia also often experiences extreme weather, adversely affecting the farmers’ livelihood. Climate change that has occurred for decades has forced smallholder farmers to adapt. This study aims to identify the impact of climate change and adaptation strategies of smallholder farmers and other Southeast Asian stakeholders. The methods used in this study are bibliometric analysis and systematic literature review (SLR). The result explains that climate change significantly impacts the decline in agricultural productivity, food nutrition, environmental quality, and resource instability. Climate change has also contributed to the increase in poverty. The adaptation strategies at the upstream level include sustainable agricultural practices, agroforestry, circular economy, crop-livestock integration, forest recovery, environmentally-friendly technology, changes in sowing and planting dates, traditional water irrigation practices, and smart farming. At the downstream level, many rural farmers migrate to cities because they cannot continue farming. The government has implemented social protection and climate risk insurance schemes for farmer households at the downstream level.