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Waste management remains a serious problem, particularly in rural areas, which generally have relatively low levels of environmental awareness. Inorganic waste such as plastic, glass, and aluminum is a major concern because it takes hundreds of years to decompose naturally. This situation poses potential long-term environmental hazards, including soil and water pollution, and ecosystem disruption. Therefore, effective educational efforts are needed to raise public awareness of waste issues. This community service activity was carried out in Sarah Perlak Village, Sungai Mas District, West Aceh Regency. The focus of the activity was the installation of educational signs containing information about the decomposition time of various types of waste. Implementation methods included direct observation to identify specific problems at the site, informal outreach to local residents, demonstrations related to waste sorting, and the creation and installation of educational signs. The signs were made from wooden planks and decorated with real waste such as plastic bottles, aluminum cans, and used paper, thus providing a tangible visualization to the community. The results of the activity showed that the visual approach through educational signs was able to attract the attention of residents, both children and adults. The information was presented clearly and accompanied by real-life examples, making the message easier to understand and remember. In addition, direct interaction through outreach and demonstrations provided an opportunity for residents to ask questions and share experiences related to waste management. Overall, this educational medium has proven effective in conveying environmental messages, raising awareness, and motivating the community to start sorting and reducing waste at the source. Going forward, this program is planned to be expanded through training in processing waste into useful products, thereby not only reducing pollution but also providing economic benefits to the community.

This study was conducted to analyze the effect of rainwater on the survival of koi fry. The background of this study is based on the increasing demand for koi fish which encourages breeders to improve the quality and quantity of fry production. However, the success of seeding is influenced by several factors, especially air quality such as temperature and pH. Rainwater is known to have less stable quality, especially due to its low pH value, so it is necessary to study its impact on koi fry. This study was conducted on November 25–28, 2024 in the Bossbaster experimental pond, Legok Nyenang Village, Kadudampit District, Sukabumi Regency. The media used were 15 plastic gallons, each containing 5 liters of air and 40 newly hatched koi fry. The experimental design used a Completely Randomized Design (CRD) with 5 treatment levels and 3 replications. Treatments included A (100% rainwater), B (75% rainwater + 25% well water), C (50% rainwater + 50% well water), D (25% rainwater + 75% well water), and E (100% well water). The results of the ANOVA test showed that there was no significant difference (P>0.05) in the survival value of koi fish fry in the five treatments. Thus, it can be concluded that the use of rainwater does not have a significant effect on the survival of koi fish fry. In addition, the results of water quality observations showed that all parameters were still within the standard quality range, except for the temperature which was slightly below the standard.

Plastic waste, particularly High-Density Polyethylene (HDPE), poses a serious threat to the environment due to its extremely long decomposition time. One effective recycling method is the extrusion process, in which process parameters such as nozzle diameter and heating temperature significantly affect the production rate and the quality of the resulting filament. This study aims to analyze the effect of nozzle diameter and heating temperature on the production rate and diameter uniformity of recycled HDPE plastic filament. The method used is an experimental approach with a quantitative design, utilizing a single-screw type extruder machine. The tested parameter variations include two nozzle diameters (1.75 mm and 2.85 mm) and three temperature levels (200°C, 240°C, and 280°C). The results of the analysis, using factorial ANOVA and control charts, show that both parameters significantly influence production performance. The highest production rate, approximately ±1.0 kg/hour, was achieved with the 2.85 mm nozzle and 280°C temperature combination, while the combination of the 1.75 mm nozzle and 200°C temperature produced the most consistent filament diameter and the best quality, with a resulting diameter of 2.84 mm, which is very close to the target of 2.85 mm. Higher temperatures increase flow rate due to decreased viscosity, but also carry the risk of thermal degradation. This study provides practical guidelines for optimizing the HDPE recycling process through extrusion.

This study analyzes the effect of variations in cooling and extrusion speeds on a single screw extruder plastic machine to produce filaments. The method used is a factorial Design of Experiment (DOE) with a two-way ANOVA test, where the cooling speed (8.7 m/s, 11.8 m/s, 14.3 m/s) is varied using the inlet valve on the blower and extrusion (20, 30, 40 rpm) is varied using a tachometer. The testing process includes measuring the dimensions and weighing the filament after the extrusion process, and the data is processed using Excel and Minitab-21. The results show that increasing the cooling speed decreases the dimensions and density of the filament, while increasing the extrusion speed increases the dimensions and density of the filament. The interaction between the two is also proven to be statistically significant with 0.000 on dimensions and 0.014 on density ≤ 0.05 (p-value ≤ 0.05). The optimizer response determined the optimal combination at a cooling speed of 14.3 m/s and an extrusion speed of 20 rpm for a target dimension of 1.75 mm, while the optimal parameters for density were at a cooling speed of 8.7 m/s and an extrusion speed of 40 rpm, resulting in the highest density of 0.246 g. These recommendations are expected to improve the efficiency and quality of filament production.  

The development of construction materials is currently very rapid, including in the manufacture of fishing boats that still use wood. As an alternative, High Density Polyethylene (HDPE) plastic can replace wood because of its various advantages. The process of making fishing boats uses the plastic welding method, where the material is heated close to the melting temperature with a welding gun. The welding rod melts due to heat and is pressed continuously while the welding gun moves backward. This study aims to determine the effect of variations in the hot gas welding process on mechanical tests, especially bending tests on plastic welding joints. The two independent variables used are the hot gun temperature (250°C, 300°C, and 350°C) and the V bevel angle (60°, 75°, and 90°). The five controlled variables include the anvil temperature of 150°C, 3,2 mm thick HDPE plastic sheet, hot gas speed welding method, 5 mm diameter HDPE plastic additives, 7 liters/minute air flow rate, 1.2 mm/s welding speed, and 2 mm root gap. The research results are expected to obtain the maximum value of the bending test strength from the interaction of hot gun temperature variations and V-beam angles, as well as being a reference in making fishing boat bodies from HDPE using the hot gas welding method.

This practicum aims to understand the process of volcanic eruptions through a simple chemical reaction simulation between baking soda and vinegar. This reaction produces carbon dioxide gas that pushes the mixture out of the bottle, resembling magma eruption from a volcanic crater. The activity was carried out using simple materials such as used plastic bottles, aluminum foil, and common household items. The procedure involved shaping a volcano using aluminum foil around the bottle, then adding baking soda, dish soap, food coloring, and vinegar as the reaction trigger. Observations showed that after the vinegar was poured into the bottle, a foamy red/orange eruption occurred, mimicking lava spewing from a volcanic crater. This simulation demonstrates that the combination of an acid (vinegar) and a base (baking soda) produces carbon dioxide gas, which forces the mixture outward in a dramatic manner. This practicum not only helps students concretely understand scientific concepts but also enhances their observation, critical thinking, and scientific communication skills through simple experimental activities.

Public awareness is needed to reduce the use of single-use plastics. One effort to reduce plastic waste is by replacing chemical-based materials with natural alternatives. This study aims to analyze the effect of beeswax thickness on the type of fabric used. A quantitative method was applied by measuring the thickness of each material sample with beeswax mass variations of 10 grams, 15 grams, and 20 grams. The results showed that blacu fabric with 15 grams of beeswax had a “very good” coating thickness. Blacu fabric with 10 grams of beeswax had a “good” thickness, while 20 grams resulted in a “fair” thickness. The thickness of the fabric material varied according to the beeswax mass and affected the coating uniformity of beeswax applied to the fabric surface.

3D printing technology is rapidly developing and being used in various fields. One of the main factors affecting print quality is the filament, with ABS being a popular material due to its eco-friendliness, ease of printing, and good mechanical strength. To achieve precision, the filament diameter must be consistent, around 1.75 mm or 2.85 mm according to the design nozzle diameter. The production of ABS filament uses a single screw plastic extruder machine, where the material is melted, extruded, and then cooled. Two main factors that affect the final dimensions are the extrusion temperature and the cooling medium. Improper temperature can alter the viscosity of ABS melt, affecting the extrusion rate and diameter accuracy. Meanwhile, differences in cooling media, such as blower air and water, affect material shrinkage and dimensional stability. This research aims to analyze the influence of extrusion temperature variations and cooling media on the diameter of ABS filaments. Through experiments with varying parameters, the pattern of diameter changes will be analyzed to determine the optimal conditions that minimize dimensional deviations. The research results are expected to contribute to the optimization of ABS filament extrusion parameters to support the 3D printing industry with higher quality materials.

Plastic bottle waste is a leftover material that is no longer used from human activities. Flower bouquet has become one of the necessities, especially for teenagers to adults. Comparison of the price of a bouquet of real flowers and artificial flowers is quite expensive, making a bouquet of flowers from plastic bottle waste a new innovation. The purpose of this study was to determine the process of making a flower bouquet, determine product validation, determine the public acceptance of the product, and determine the comparison of the price of production costs of a flower bouquet of plastic bottle waste, real flowers, and artificial flowers. This research uses the methods of observation, literature, experimentation, documentation, interviews, and questionnaires. The process of making a bouquet consists of the preparation of tools and materials, and manufacturing steps starting from bottle selection, bottle cleaning, bottle formation according to flower patterns, pattern assembly, application of color paint, glitter, and clear paint. Making a flower bouquet from plastic bottle waste was carried out through three experiments. The results of the validation test to 3 expert validators based on the assessment of shape, color, appearance, circuit patterns, and color combinations that obtained decent results were the products in the third experiment with a score of 15. The results of the public test to 34 respondents on the public acceptance of the products in the third experiment based on aspects of shape, color, appearance, circuit patterns, and color combinations were very like (score 3). So that the product in the third experiment was accepted by the community. So that the product in the third experiment is accepted by the public and has the potential to become a business opportunity. We recommend that craftsmen streamline time in the manufacturing process and use gloves to avoid droplets of wax glue and cuts due to cutters or sharp bottle parts.

Antibiotic resistance (AR) has emerged as a critical global public health concern, particularly due to the spread of antibiotic-resistant bacteria (ARB) and their genes in natural environments. The oceans, which host diverse ecosystems and serve as major food sources, are increasingly affected by ARB pollution, originating from human, agricultural, and industrial activities. Simultaneously, climate change (CC) exacerbates the situation by raising ocean temperatures, lowering pH, and altering marine biodiversity—creating optimal conditions for bacterial survival and gene transfer. This review explores the interconnectedness between ocean pollution and CC and how both factors influence the distribution and persistence of ARB and antibiotic resistance genes (ARGs) in marine ecosystems. Through a systematic literature review of 174 peer-reviewed articles, the study highlights how anthropogenic pollutants—especially antibiotics, heavy metals, and plastics—contribute to resistance emergence. Furthermore, it discusses the transmission pathways from pollution hotspots (e.g., hospitals, agriculture, wastewater) to the oceans. The One Health (OH) strategy is presented as a comprehensive solution to address the environmental, human, and animal health risks posed by antibiotic pollution. This paper serves as a basis for future research into surveillance, mitigation, and policy interventions for controlling AR in marine environments.

The innovations in the fashion world appears according to technological advances that always bring up new ideas. For example, ready-to-wear clothing that has several looks, one of which is streetwear. The application of burnt fabric is to combine elements of the burnt fabric technique (pembakaran kain) in ready-to-wear look streetwear, the application of the burnt fabric technique aims to create new creations and new patterns on streetwear clothing. The method used in this study is a qualitative method, observation, documentation, literature, and analysis. The results of this final project are ready-to-wear clothing with a streetwear look given variations of burnt fabric on the jacket. The making of this burnt fabric requires high concentration and accuracy. The conclusion from the application of burnt fabric is that the fabric used in the making of burnt fabric takes a big effect on the final result of the burnt fabric. If using a plastic textured cloth, it cannot be burned and produces lumps or  will melt. From taking this title, the writer hopes that it can be useful for the fashion world, inspire fashion creation, and create new opportunities in the fashion world. Suggestions for making burnt fabric on jackets, it would be better to use a pattern first so that the burnt fabric motif is organized and according to the design.

The plastic waste emergency in Denpasar reflects an ecological and social crisis due to the accumulation of single-use plastics. In response, the Bali Provincial Government issued Governor Regulation No. 97/2018, though its implementation remains limited. This study analyzes forms of community resistance to the policy and identifies structural causes and implications. Using a qualitative approach grounded in Cultural Studies, the research reveals resistance in passive, symbolic, and active forms, driven by information asymmetry, economic burdens, and lack of participatory policy-making. Findings show resistance as an articulation of agency within power/knowledge relations. The study concludes that environmental policy success depends on authentic public engagement as subjects of change.

Empty oil palm bunches processed by palm oil mills in Indonesia are still abundant, reaching 56.35 million tons per year. Empty oil palm bunches contain around 40% cellulose, so they can still be used for various derivative products, one of which is composite products. The use of empty oil palm bunches as raw materials for Bioplastic production is a series of ongoing research, one of which is starch-cellulose blend, but until now it has not been successfully commercialized. The design of the starch cellulose blend bioplastic industry using palm oil as raw material produces two factories, namely a cellulose factory and a composite bioplastic factory. Both factories are designed in separate buildings. The separation of cellulose from TKKS uses a chemical method with soda, after mechanical treatment of size reduction. The industry is designed in 3 scales of production capacity, namely a large scale of 190,000 tons / year, medium 115.00 tons / year, and small 40,000 tons.year. The financial analysis of the three scales of production capacity as a whole is declared feasible. Profit margin is calculated at a minimum of 17.6%. The average payback period is between 3-5 years with an IRR of 24-49%. Analysis of the economic value produces an EScale index of 0.64 which indicates that the economic scale has been achieved. The economic scale of the starch cellulose blend bioplastic industry from TKKS is at a production capacity of 40,000 tons per year with a minimum supply of TKKS raw materials of 20,203 tons/year. At the smallest economic scale, the BEP is actually only 6627.4 tons/year, where this condition can be achieved because the industry has relatively small fixed costs.

Sampah plastik menjadi masalah krusial di dunia mengingat jumlahnya terus bertambah hingga mencapai 14 juta ton setiap tahunnya. Sampah plastik yang tidak terurai menimbulkan masalah lingkungan, sehingga diperlukan penanganan yang signifikan dalam mengatasi masalah sampah tersebut. Di negara-negara berkembang , masalah sampah plastik masih menjadi tantangan, seperti di Thailand yang tercatat pada tahun 2024 sebagai salah satu negara dengan produksi sampah plastik tertinggi hingga mencapai 45kg/kapita/tahun, sedangkan Indonesia sebesar 15kg/kapita/tahun. Tujuan dari penelitian ini adalah untuk menganalisis dan membandingkan kebijakan pengelolaan sampah plastik di Indonesia dan Thailand, guna mengidentifikasi program-program yang dilaksanakan kedua negara tersebut untuk mengurangi volume sampah plastik. Metode penelitian ini menggunakan library research yang bertujuan untuk menganalisis dan memahami kebijakan pengelolaan sampah plastik di Indonesia dan Thailand. Penelitian ini relevan untuk dilakukan mengingat masih terbatasnya studi banding yang secara khusus membahas kebijakan pengelolaan sampah plastik di negara-negara berkembang, khususnya antara Indonesia dan Thailand. Padahal, kedua negara tersebut menghadapi tantangan yang cukup berat terkait dengan meningkatnya volume sampah plastik setiap tahunnya. Minimnya penelitian sejenis menjadi alasan utama pemilihan topik ini, guna mengisi research gap yang ada. Hasil penelitian menunjukkan bahwa kedua negara memiliki kebijakan nasional sebagai langkah penanggulangan permasalahan sampah plastik, di Indonesia diatur dalam Undang-Undang Nomor 18 Tahun 2008 dengan prinsip 3R, sedangkan Thailand dengan Peta Jalan Pengelolaan Sampah Plastik 2018-2030. Melalui pendekatan studi pustaka, penelitian ini mampu memberikan sumbangan akademis berupa pemetaan kebijakan dan evaluasi implementasi program yang telah dilakukan di masing-masing negara, sebagai dasar penyusunan strategi pengelolaan sampah plastik yang lebih efektif dan berkelanjutan.  

Surya Indo Plastic is a pioneer company that provides exceptional quality recycled plastic food packaging for the food and beverage industry. Established in 2006 in Indonesia. The company wants to make a positive impact and contribute to protecting the environment by offering food packaging that contains 100 percent recycled plastic, which meets the highest quality and performance standards. The company works hard to accelerate the recycling of its products. Because every cup, every lid must make a difference. PT. Surya Indo Plastic is an example that packaging can be made sustainably, to prevent plastic waste from entering our environment. By raising awareness, supporting the circular economy, and encouraging individuals and companies to recycle. SIP's ambition is to provide the best quality food packaging made from sustainable recycled plastic materials while providing the best customer service. PT Surya Indo Plastic's goal is to make a difference in food packaging through innovation, responsibility, and collaboration. The purpose of this study was to determine the effect of authentic leadership, organizational identity and employee engagement on job satisfaction and company performance at PT. Surya Indo Plastic in Sidoarjo. This study uses a quantitative method with primary data sources obtained from distributing questionnaires. The population of the study were employees of PT. Surya Indo Plastic in Sidoarjo. The selection of respondents was carried out using the saturated non-probability sampling method with a total of 208 respondents. The data analysis method used descriptive analysis and SEM-PLS analysis. The results showed that the variables of authentic leadership, organizational identity and employee engagement influenced job satisfaction and company performance of PT. Surya Indo Plastic in Sidoarjo.

Plastic waste is currently still a serious problem for society due to the lack of sensitivity to environmental problems and the impact of careless disposal of plastic waste in many places. The injection molding process on industry scale often faces obstacles such as machines that have not worked efficiently, injection capacity that is unable to fill the mold completely, and the emergence of product defects due to plastic flow that begins to freeze before the entire cavity is completely filled. This study aims to design and simulate a prototype injection molding machine with a capacity of 4 tensile test specimens (total volume 28.5 cm³) in order to overcome these problems and to adjust the practicum needs of mechanical engineering students. The design process is carried out with SolidWorks software for 3D design, as well as flow simulation using SolidWorks Plastics and Flow Simulation with recycled Polypropylene (PP) material at melting temperature ± 230 ° C and injection pressure ± 5.3 MPa. The design results in a machine with dimensions of 1273 × 400 × 826 mm equipped with main components in the form of a frame, electric motor and gearbox, hopper, body safety, wheels, piston cylinder, control panel, heater, screw with barrel, and mold. SolidWorks Plastics simulation shows that the plastic flow fills the mold evenly with a filling time of 10.93 seconds, cycle time of 83.94 seconds, and maximum pressure of 5.38 MPa in the gate area, while Flow Simulation simulation shows a spiral flow pattern from the hopper to the end of the mold without backflow, with a mass flow rate of 0.0227 kg/sec and an average pressure of 97.765 Pa. These results prove that the design and simulation can improve process efficiency and mold quality

PT Perkebunan Nusantara I (PTPN I) is an Indonesian State-Owned Enterprise (BUMN) specializing in plantation operations, particularly the cultivation and processing of primary commodities, including rubber, coffee, and tea. Additionally, the company engages in secondary ventures such as tobacco production, plastic sack manufacturing, and asset optimization. As of December 1, 2023, PTPN I functions as a subholding entity with regional offices strategically located in Sumatra, Java, and Sulawesi to enhance operational efficiency. The company was originally established in Aceh in 1961 as PPN Kesatuan Aceh, marking the beginning of its long-standing presence in the industry.This study aims to analyze the impact of transformational leadership, internal communication, and work ability on both organizational commitment and organizational performance at PTPN I’s Surabaya region. Utilizing a quantitative causal-explanatory approach, primary data was collected through structured questionnaires. The target population comprised employees of PTPN I in Surabaya, with 100 respondents selected via purposive sampling. Data analysis techniques included descriptive statistics and SEM-PLS (Structural Equation Modeling-Partial Least Squares). Findings reveal that transformational leadership, internal communication, and work ability significantly and positively influence organizational commitment. Likewise, transformational leadership, work ability, and organizational commitment exhibit a significant positive relationship with organizational performance. However, although internal communication has a favorable effect, its impact on organizational performance is not statistically significant in this context.

This community service activity aims to increase awareness of the younger generation in Sanrobone Village, Takalar in maintaining environmental cleanliness and health through an educational and participatory approach. Activities include counseling on 3R waste management (Reduce, Reuse, Recycle), composting training, the formation of a village waste bank, and real actions in the form of planting trees and cleaning water channels. The results of the activity showed a significant increase in the understanding and skills of young people in managing waste and protecting the environment. In addition, the formation of the Sanrobone Village Waste Bank is the first step in efforts to reduce plastic waste and increase the economic value of inorganic waste. This activity has succeeded in fostering the commitment of the younger generation as pioneers of a sustainable clean and healthy environment movement in the village.

Coastal environmental pollution, especially due to plastic waste, has become a serious threat to marine ecosystems and public health. Nambo Beach in Kendari City, Southeast Sulawesi, is one of the areas affected by the lack of waste management and low public awareness. This community service activity aims to increase community awareness and participation in maintaining beach cleanliness through clean-up actions and environmental education. The methods used include collecting rubbish by students and providing education to visitors through poster media. The results of the activity show that there is community enthusiasm for this activity as well as increased understanding of the importance of protecting the environment. Visual education has proven effective in conveying environmental messages, while beach clean-up actions encourage direct behavior change. This activity proves that collaboration between academics and the community can create a positive impact and needs to be implemented sustainably as part of a participatory-based waste management strategy in coastal areas.

Packaging plays an important role in maintaining the quality, stability, and effectiveness of medicines, both in the form of pharmaceutical preparations and herbal products. This review article aims to analyze the role of primary and secondary packaging materials through literature studies from various relevant journals. The method used was a literature review of four selected national and international journals that discussed the influence of packaging on product stability, information effectiveness, and product image in the eyes of consumers. The results of the study show that primary packaging functions to protect products directly from environmental influences, while secondary packaging functions in distribution, storage, and strengthening visual and branding aspects. Innovations such as the use of adsorbent plastics and visual redesign have been proven to increase stability and consumer confidence in the product. It can be concluded that packaging is a crucial aspect that not only maintains the physical-chemical quality of the product, but also shapes consumer perception and compliance.