To depict detailed sustainability efforts that have been implemented in campus environments, research was conducted at the Universitas Diponegoro (UNDIP), a leading green campus in Indonesia. The aim of the current study was to explore how sustainable development has been conducted by UNDIP and to identify factors that may indicate the existence of sustainability activity in higher-education institutions (HEIs). Factors affecting sustainability implementation in HEIs were derived using bibliometric analysis. Information on the implemented strategies to maintain the sustainability of HEIs was obtained via a closed questionnaire to 40 relevant experts, and analyzed using strengths, weaknesses, opportunities, and threats (SWOT) analysis, and quantitative strategic-planning matrix (QSPM) analysis. Institutional commitment to sustainability and guidance to implement sustainability in HEIs were found to have the highest scores with regard to internal and external factors. The respondents selected more aggressive strategies for the enhancement of sustainability implementation at UNDIP. Fostering external collaboration should be a priority for UNDIP since this can provide mutual benefits and significant improvement towards achieving Sustainable Development Goals (SDGs). The current study provides a robust self-assessment method for selecting appropriate strategies to maintain HEI sustainability.
Approximately 1,000 tonnes of solid waste are generated in Semarang every day, only 850 tonnes of which are transferred to the Jatibarang Landfill. Solid waste that is not transferred to the landfill can trigger environmental and health problems. With the help of community groups, reduction of solid waste is achievable using ‘the three Rs’ of waste reduction and the implementation of waste banks. Waste banks could act as mediums for depositing waste, improve the socio-economic status of local residents, and develop community connections. Waste banks improve the volume of waste reduction and reduce landfilled waste, helping to extend the operational life of landfills. This study examined the role of waste banks in Semarang and the potential to improve waste management based on the sampling of solid waste generation and composition. This topic was investigated with a purposive sampling method. Results showed that the existing system of waste banks in Semarang is ineffective in reducing waste. However, the system could be improved by increasing waste bank usage, including for various types of valuable waste in Semarang.
Plastic marine debris are a potential threat to the life of marine organisms such as corals. This study aimed to analyze the effect of different plastic waste attachments on the bleaching rate and the health of branching corals at Kelapa Dua Island. Branching coral colonies consisted of 15 fragments of Porites cylidrica at the water depth of 80-90 cm, then treated with plastic waste (control, clear plastic, sack plastic, packaging plastic, and black plastic) for four days. Determination of color changes in corals was determined using Adobe Photoshop CC 2019 and Image j software to obtain the area of the discoloration. The treatment with black plastic became most impactful, with a discoloration area of 5.33 ± 0.48 cm2 and a healthy percentage of 73.62 ± 2.00%. Results of the linear regression between coral discoloration rate and light intensity showed a negative correlation, with r = -0.77 and R2 = 0.59, then between the percentage of coral health and light intensity showed a positive correlation, with r = 0.83 and R2 = 0.69. These results indicated that the decrease in light intensity due to the covered plastic debris affected the discoloration rate and the health percentage of branching coral.
One of the problems that are faced by the Universitas Islam Indonesia (UII) is the amount of solid waste generated each year, add the increasing number of the student each year, then the problem becomes much worse and difficult to handle. Regarding it, the awareness of each student about solid waste management is needed. The 2 main purpose of this study is first to determine the composition and the generation of solid waste using the samples taken from 10 temporary solid waste dumps (FPSB, D3 Economics, FMIPA, FTI, FIAI, FTSP, FK, Central Library, Kahar Muzakir, GKU, and Rectorate) and the second is to identify student’s perceptions and behavior about individual solid waste management. The research was conducted using qualitative and quantitative descriptive approaches. The results show that the average amount of solid waste generated is 0.017 kg/person/day this is in line with the solid waste management record that shows that on daily basis each person produces approximately 0.010 - 0.020 kg. While the study about the students’ perceptions and behavior towards solid waste management shows that while most of the students are aware of it, the implementation is still lacking.
About 15% of the total population of Semarang City does not get any waste management service. The lack of the infrastructure for collecting and processing waste, transportation, and disposal of the waste in the unserved area is believed to be the causes of the problem. As a result, incineration becomes the solution chosen for some people. Unfortunately, incineration has adverse effects. The ash produced by the incineration contains pollutants. To reduce the ash, the pollutant control devices that can be applied to the incinerator are needed. It is also necessary to monitor air quality emissions to find out the ash opacity value of burning material. The modification into two variations was carried out to determine the performance of the incinerator. The first system variation uses the principle of spreading water on the ash produced by the incineration. While the second system variation uses the principle of passing the ash in the submerged water. The composition of the waste burned in the incinerator was 38.115% leaves, 3.458% branches, and 20.475% food scraps. The measurement of the opacity value is done at the inlet and outlet of the incinerator.
The addition of bentonite to fly ash can lower the permeability coefficient of the composite landfill liner. Also, the montmorillonite bentonite can bind quite a lot of water molecules during the hydration process. In this study, the effect of mixture, water content, and salinity on the desiccation cracking phenomenon in the bentonite - fly ash mixture as a landfill liner system was investigated by conducting tests such as desiccation test, water content test, and standard proctor and permeability test. The variation in bentonite levels: 0%, 15%, 20%,25% and 25% + 1 N NH4Cl solution. The result shows that the appropriate mixture is fly ash + 15% bentonite with permeability of 4,065 x 10-7. The mixture complies with local regulations where the permeability coefficient of the bottom layer of the landfill should be less than 10–6 cm/s and have a low cracking value (CIF). Furthermore, the addition of saline solution to the composite can rise the value of the optimum moisture content. However, saline conditions can decrease the value of CIF drastically
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