Oil and gas companies generally have large green areas as part of fulfilling environmental and aesthetic obligations in industrial areas. Routine maintenance such as grass cutting produces organic waste that needs to be managed efficiently to prevent negative environmental impacts. This study aims to calculate the generation of grass waste in oil and gas company areas by comparing two methods: direct weighing and sampling methods. The direct weighing method is carried out by collecting and weighing the results of the cutting in a limited area, while the sampling method involves taking samples from several representative points and extrapolating the results to the entire area. The results showed that the average grass waste generation was 0.286 kg/m². With an area of ??around 1,000 m², the total generation is estimated to reach 286 kg. Both methods have proven to complement each other: direct weighing provides precise data, while the sampling method allows for efficient estimation for larger areas. This data can be used as a basis for planning more adaptive, effective, and sustainable grass waste management, including the use of waste as organic compost that has economic value and is environmentally friendly.
 

Oil and gas industry activities have the potential to produce high carbon emissions, so Green Open Space (RTH) is needed as an effort to mitigate environmental impacts. Shrub vegetation that grows in RTH areas requires routine maintenance, but this process produces vegetation waste that has not been studied quantitatively. This study aims to analyze the generation of shrub vegetation waste using a sampling method as a basis for sustainable waste management planning. The method used is sampling on a 1 m³ cube-shaped plot in three locations with different vegetation characteristics. Cutting is done manually using simple tools, then the waste produced is put into a measuring box to calculate its volume. The results show that sample point 1 produces 1.00 m³, sample point 2 is 0.50 m³, and sample point 3 is 0.30 m³. The average volume of shrub waste generation is 0.60 m³ per square meter. This data is important for planning the capacity of equipment, labor, and temporary waste disposal locations. In addition, the characteristics of waste that is easy to dry and has a high organic content opens up the potential for reuse as compost or biomass. This method has proven to be effective and efficient in supporting environmentally friendly vegetation waste management strategies as well as part of compliance with environmental regulations such as PROPER.
 
 

As an integral part of Tanjung Perak Port, Kalimas Terminal holds a strategically important position in supporting Indonesia’s national export and import activities. Its vital role makes it one of the key logistics hubs in the country. During its operations, the generation of hazardous and toxic (B3) waste is unavoidable, requiring swift and proper handling to prevent environmental degradation and protect public health. This study aims to assess the level of compliance in B3 waste management at Kalimas Terminal, Tanjung Perak. The research focuses on evaluating key aspects such as the identification, collection, storage, and transportation of B3 waste, along with the completeness of related documentation, in accordance with applicable environmental regulations. By examining the current waste management practices in place, this study also seeks to formulate strategic recommendations to enhance the effectiveness and sustainability of B3 waste handling in the future.

A shipyard company in Surabaya, which is one of the major industries, generates a large amount of organic waste, including food waste, vegetables, fruits, leaves, and wood. Although this organic waste is a potential source of humus and essential nutrients for the soil, most of it has not been optimally managed. Composting is an effective method to process organic waste into compost, which can reduce the negative impact of toxic compounds and pathogens on the environment. This research aims to evaluate the effectiveness of using two types of activators, namely PROMI and ecoenzymes, in accelerating the composting process and improving compost quality in accordance with SNI 19-7030-2004 standards. PROMI activator, which contains various microorganisms such as Trichoderma Harzianium, Pseudokoningii, and Aspergilus sp., and ecoenzymes, which is produced through fermentation of organic materials, were applied to shredded organic waste. The results showed that the use of both activators could accelerate the decomposition process of organic materials and produce high-quality compost within 21 days. With the final measurement results of both composts, both with PROMI and ecoenzymes treatment, the same pH and temperature values were obtained, namely pH 7 and temperature 30?. Parameters such as pH, temperature, colour, smell, and texture of the compost are recorded periodically to ensure the composting process is going well. Thus, the use of PROMI and ecoenzymes activators not only increases composting efficiency but also provides a sustainable solution for organic waste management in the shipyard industry.

The shipbuilding industry produces organic and inorganic waste. The organic waste produced by the shipbuilding industry is dry leaves, dry grass, dry wood and other dry materials. Organic waste management is becoming increasingly important in this industry because the industry's very rapid growth has the potential to increase negative environmental impacts if not handled properly. Utilizing organic waste into fertilizer is an activity that can be carried out with the aim of reducing waste around the shipyard industrial environment. This organic fertilizer is made using a simple composting method so that it can be applied in this industry. The composting process involves 2 different treatments, namely the first is an activator solution in the form of a mixture of ecoenzymes, water and sugar solution and the second is using Effective Microorganism 4 (EM 4). The results of the research showed that these two treatments produced a pH that was not much different, namely 6.9 for EM4 and a pH of 7 for the ecoenzymes activator. The temperature of the compost produced in the ecoenzymes mixture treatment was 300C and in the EM4 treatment was 300C. This shows that the activity of decomposing microorganisms is running well.
 
 

Shipbuilding industrial companies still produce a number of organic waste in the form of twigs, grass and leaves. In line with developments in the current era, organic waste that accumulates will become an issue for the environment if it is not managed properly. This activity was carried out to overcome the problem of organic waste in the shipbuilding industry, by utilizing organic waste for composting. Composting is a simple anaerobic method that can be easily carried out in the shipbuilding industry. This method turns organic waste into compost by carrying out a fermentation process. Organic waste in the form of leaves that are turned into compost can increase the nutrient content in the soil. The composting process is carried out using two different activator materials, namely using Effective Microorganisms 4 (EM 4) and Promoting Microbes (PROMI). The results of the compost research carried out have met the quality standards according to SNI 19-7030-2004. The final results of these two treatments are not too different, the pH resulting from the EM4 activator treatment is 6.9 and the pH from the PROMI activator treatment is 7. The temperature value for both does not exceed the ground water temperature, namely the final temperature of the EM4 activator treatment is 29.9oC and from PROMI activator treatment of 30oC. The observation results show that of the two activators EM4 and PROMI, the one that is more effectively used for composting is the EM4 activator because the microorganism content in EM4 has more classifications compared to the PROMI activator.