How Singapore Stays One Of The Cleanest Cities In The World | Singapore Hour

Key Concepts

• Visible enforcement to deter littering and other offenses
• Technology adoption for efficient waste management (waterway robots, drain sensors)
• Waste reduction and recycling initiatives (composting, AI-powered food waste tracking, Waste Master)
• Circular economy approach to waste management

Enforcement and Deterrence

• The National Environment Agency (NEA) deploys officers in visible patrols in cleanliness hotspots like Orchard Road.
• The goal is to deter offenses like littering and smoking in non-designated areas through a visible presence.
• Officers issue fines for offenses.
• Enforcement officers are trained to de-escalate potentially volatile situations.
• The strategy aims to change behavior by making enforcement visible to the public, not just the offender.
  • Quote: "Even the passersby or would-be offenders will be deterred from committing offenses." - Shaun, NEA Officer

Technology in Public Cleaning

• Public cleaning is manpower-intensive, so Singapore adopts technologies to ease manual work.
• Waterway robots are used to trap floating waste in waterways like Sungei Seletar.
  • The robot follows a pre-programmed route, trapping litter in a basket.
• Sensors are placed in drains to detect blockages early.
  • The sensors use light pulses, low-light cameras, and flashlights to measure debris levels.
  • Alerts are sent to a command center and field supervisors when blockages are detected.

Waste Management at Changi Airport

• Changi Airport handles over 67 million passengers annually and employs over 60,000 people.
• Waste management is a key part of the airport's sustainability efforts.
• The airport composts flowers, including sunflowers from the Terminal Two garden.
  • The sunflower garden has almost a thousand sunflowers, which are changed every 10 days.
  • The stalks, leaves, and dried flowers are ground and composted for three months.
  • The compost is then mixed with soil to help other plants thrive.

Waste Management at Marina Bay Sands

• Marina Bay Sands serves 15,000 staff meals daily, generating a significant amount of food waste.
• AI is used to track food waste in the staff kitchen.
  • Cameras identify the type and weight of food waste.
  • The data is used to refine menus and portion sizes to reduce waste.
• The Waste Master is used to process remaining food waste.
  • The Waste Master uses advanced oxidation and thermal treatment to create a nutrient-rich substrate.
  • The substrate is processed into pellets and used as fish feed at local farms.
  • Quote: "The Waste Master has allowed us to salvage the value and the nutrients from the food that would normally be thrown away." - Roger, Sustainability Lead at Marina Bay Sands

Conclusion

Singapore's cleanliness is maintained through a comprehensive system that includes visible enforcement, technology adoption, and waste reduction initiatives. The city employs strategies ranging from visible patrols to AI-powered waste tracking and advanced composting to maintain its clean reputation. The focus is on preventing problems before they arise and creating a circular economy for waste management.