Traditional rubbish collection using heavy diesel lorries is increasingly unsustainable for modern urban centres due to traffic congestion, carbon emissions, foul odours, and pest issues, driving STREAM to pioneer subterranean Automated Waste Collection Systems (AWCS) that treat refuse management as an essential underground utility. By conveying waste from building chutes through sealed underground pipes via high-speed airflow directly to a central handling facility, AWCS completely eliminates surface collection vehicles, which significantly lowers fuel consumption, carbon emissions, road wear, and manual labour while improving hygiene and freeing up valuable ground-level real estate. To cater to diverse infrastructure, STREAM provides specialised engineering solutions - including the Gravity Vacuum System (GVS) for residential and healthcare facilities, the Full Vacuum System (FVS) for high-volume hubs like airports, and the energy-efficient Shuttle Vacuum System (SVS) - alongside source-separation capabilities for food waste and automated IoT controls that ensure seamless, continuous operation for cleaner, smarter cities.