Sewage Treatment Plants (STPs) are vital for treating wastewater on ships, ensuring compliance with international maritime pollution regulations. These systems process sewage through various stages, including biological treatment, filtration, and disinfection, to remove contaminants before discharge. Advanced STPs are designed to handle varying load conditions and ensure efficient operation even in challenging environments. Regular maintenance and monitoring are essential for optimal performance and regulatory compliance. By effectively treating wastewater, sewage treatment plants protect marine environments and promote sustainable maritime practices.