The generation of organic waste is one of the biggest problems in developing countries like Indonesia. Examples of organic waste that can be obtained, such as leaves, include banana leaves and coconut leaves. One way to process waste that can generally be done is by composting. In the composting process, a bioactivator such as EM4 is needed to accelerate the reaction process in the waste. This study aimed to determine the effectiveness of EM4 bioactivator in the degradation process of banana leaf and coconut leaf waste. Measurement of processing quality is measured in-situ with parameters of temperature, pH, and humidity. The waste temperature increased above 32oC for the addition of EM4 bioactivator, while without the addition of bioactivator it only increased to 31oC. pH tended to be in normal conditions and was in an acidic state on day 12. Humidity decreased from the beginning of the waste process to the end of the process. The final result of composting quality has met the criteria of SNI 19-7030-2004. There was also a decrease in the C/N content during the process, adjusting to soil conditions. The decrease in the value of C/N on the addition of bioactivator also influences the composting process.

<p>Coconut leaf waste is a type of waste that contains a good enough calorific value to be used as raw material for biomass pellets. The minimum standard calorific value of biomass in Indonesia according to SNI 8675:2018 is 16.05 MJ/kg. Meanwhile, based on the research results, the calorific value of coconut leaf waste has a value of 13.34 MJ/kg. The way that can be applied to increase the calorific value is by biodrying. This study aimed to determine the effectiveness of the biodrying process in processing coconut leaf waste. This study use bioactivators in the form of tempe yeast, baker's yeast, and tapai yeast. Mass loss and moisture reduction can be achieved, respectively, 8.25-17.62% and 62.4-65.6%. The calorific value can reach the minimum standard after seven days of processing with a value of 17,995-18,623 MJ/kg.</p>

Industri batik merupakan salah satu bisnis tekstil yang paling berkembang di Indonesia. Hasil samping dari proses membatik adalah berbagai bentuk limbah, seperti limbah padat dan limbah cair. Pencemaran terutama bersumber dari limbah cair yang berupa zat warna yang dihasilkan sisa bahan pewarna, proses pencucian dan pembilasan kain batik. Pada umumnya limbah industri batik terdiri dari dari sisa mori, ceceran lilin, sisa air pewarnaan, sisa lilin dan air pelorodan. Salah satu cara untuk mengurangi dampak lingkungan dari proses pembuatan batik adalah dengan menggunakan analisis life cycle assessment (LCA). Penelitian ini bertujuan untuk menganalisis dampak lingkungan dari proses pembuatan batik dan input bahan baku yang memiliki dampak lingkungan paling signifikan. Analisis dampak lingkungan dilakukan dengan menginventarisasi input dan output berdasarkan database ecoinvent 3 menggunakan software Simapro 9.1.1. Metode analisis dampak lingkungan dilakukan dengan environmental product declaration (EPD) 2018. Hasil analisis gate-to-gate menunjukkan bahwa dampak lingkungan tertinggi adalah pemanasan global. Sedangkan dari sisi penggunaan bahan baku dan energi, parafin perlu diminimalisir. Penggunaan parafin menyumbang 68,705% dari total dampak lingkungan dari proses pembuatan batik.The batik industry is one of the most developed textile businesses in Indonesia. The by-products of the batik-making process are various forms of waste, such as solid waste and wastewater. Pollution mainly comes from liquid waste in the form of dyes produced by residual dyes, washing and rinsing processes for batik cloth. In general, batik industry waste consists of residual mori, spilled wax, residual staining water, wax residue and pelorodan water. This liquid waste is generated due to the use of synthetic dyes in the batik industry. One way to reduce the environmental impact of the batik-making process is by using a life cycle assessment (LCA) analysis. This study aims to analyze the environmental effects of the batik-making process and the raw material input, which has the most significant environmental impact. Environmental impact assessment is carried out by inventorying inputs and outputs based on the ecoinvent 3 databases with Simapro 9.1.1 software. The environmental impact analysis method is carried out with the 2018 environmental product declaration (EPD). The results of the gate-to-gate analysis show that the highest environmental impact is global warming. Meanwhile, from the use of raw materials and energy, paraffin needs to be minimized. The use of paraffin accounts for 68.705% of the total environmental impact of the batik-making process.

<p>During the COVID-19 pandemic, the use of masks is an obligation for everyone to maintain the transmission of the virus to fellow humans. Public places such as stations are one of the locations that may produce single-use masks as personal protective equipment waste. This study aimed to plan the most appropriate type of infectious waste container for disposable masks. Storage with the addition of ultraviolet lamp technology is one way to increase virus removal efficiency compared with no further processing. In this study, it was estimated that the most appropriate container volume is with a capacity of 50 L per station. The collection must be done every 24 hours; the estimated cost for one container can reach IDR 1,988,900. This planning can reduce the amount of mask waste used for the environment and reduce the burden applied to these places at the end.</p>

Keterbatasan proses pembelajaran selama pandemi COVID-19 membuat siswa sulit untuk menerapkan proses pembelajaran berioteasi proyek. Lembaga Penelitian, Pemberdayaan dan Pengabdian Masyarakat, serta Inovasi (LPPMI) Universitas Pertamina memberikan kesempatan pada siswa untuk tetap menerapkan kegiatan tersebut dengan fun research. Salah satu kelompok siswa yang didampingi berasal dari SMAN 90 Jakarta yang memiliki topik penelitian “Mewujudkan Ketahanan Energi Dengan Pelet Briket Ramah Lingkungan dari Limbah Sisa Makanan Sebagai Energi Bersih dan Terjangkau”. Tema penelitian tersebut sangat berkaitan dengan penelitian yang dilakukan oleh tim dosen Program Studi Teknik Lingkungan Universitas Pertamina. Oleh karena itu, tim siswa SMAN 90 Jakarta didampingi oleh tim dosen Program Studi Teknik Lingkungan Universitas Pertamina. Tujuan dari kegiatan pengabdian ini adalah untuk menghasilkan prototype dan membantu siswa dalam mencapai tujuan penelitian. Selama tiga bulan pendampingan siswa SMAN 90 Jakarta telah menghasilkan protype reactor biodrying beserta pelet yang memiliki nilai kalor yang tinggi sebagai energi baru terbarukan.