Food Recycling

In China, recycled food waste is increasingly processed into biogas, primarily composed of methane (CH₄) and carbon dioxide (CO₂), through anaerobic digestion.

Facilities in cities like Beijing and Shenzhen convert leftover restaurant grease, household food scraps, and expired supermarket goods into methane-rich biogas, which is then purified and used for electricity generation, heating, or as compressed natural gas (CNG) for public transport.

Some pilot programs also produce biodiesel from collected waste cooking oil, known as “gutter oil,” which undergoes filtration and transesterification to become fuel for industrial vehicles.

These systems help reduce landfill load, lower greenhouse gas emissions, and support China's circular economy goals.