Waste management in the Primorsko-Goranska County is becoming increasingly important due to the rise in municipal waste along the coast and islands, driven by an increase in tourism. The paper examines the efficiency of a specialized ship designed for the collection, recycling, processing, and gasification of pre-sorted municipal waste from the islands of Krk, Rab, Cres, and Mali Lošinj. Bales of recycled waste and inert ash, obtained from the combustion of non-recyclable waste, would be unloaded at the port of Rijeka. The ship is designed to utilize a plasma gasification system, where the non-recyclable fraction of mixed municipal waste would be exposed to extremely high temperatures of around 5000°C, generating synthetic gas (syngas) to be used as fuel for powering the ship and producing electricity for all onboard systems. The byproduct of the process would be inert ash, constituting about 5% of the initial waste mass. The paper also includes a calculation of the calorific value of the generated syngas and an estimation of the produced energy and gas quantities. It investigates the suitability of the generated fuel for powering the ship's gas engine, with a particular focus on maintaining energy efficiency and system stability throughout the year. By analyzing the operational plan and energy balances, the system's capability to adapt to seasonal variations in waste generation while maintaining high sustainability and efficiency is demonstrated. A detailed overview of the technologies required for integrated waste management on the Kvarner islands is presented, focusing on reducing environmental impacts and enhancing sustainable development.