In Response to National Environmental Policies and a Commitment to Preserve Lianshan's Green Waters and Mountains, and Ensure a Prosperous Life for Residents, the Lianshan County Housing and Urban-Rural Development Bureau conducted a field investigation and in-depth study of household waste pyrolysis gasification units. This technology enables the safe, on-site treatment of household waste. Post-treatment, the waste is converted into ash and slag, achieving a waste reduction rate of 95-97%. The exhaust gas fully complies with environmental standards, and water is recycled within the system with no external discharge.
Following thorough evaluation, the Lianshan County Housing and Urban-Rural Development Bureau took the lead in piloting the application of pyrolysis gasification technology. A unit was deployed for trial operation in Meidong Village, Futang Town. A 2-ton per day capacity unit was launched in January 2019, delivering remarkable results. Meidong Village is located in a remote mountainous area characterized by winding roads, high altitude, and poor transportation access. It is connected to Futang Town by approximately 20 kilometers of mountainous roads, which are frequently affected by landslides during the rainy season.
Meidong Village administers nine village groups with a total population of nearly 2,000 people, generating about 2 tons of waste daily. Previously, household waste in Meidong Village was disposed of in simple landfills, with rampant littering in river channels, roadsides, and hilltops. As the saying goes, people live off the local resources; cash crops such as sweet potatoes, ginger, and Chinese fir are vital to the villagers' economy. With the increasing volume of waste, improper handling would inevitably severely impact local water and soil quality, thereby affecting crop growth and residents' livelihoods.
The pyrolysis gasification unit is simple to operate. On-site workers perform basic sorting of the delivered waste daily before feeding it into the furnace. Currently, the daily waste generated is processed promptly each day. The unit is energy-efficient, requiring no external auxiliary heat source. It relies on advanced pyrolysis gasification technology to treat the waste, consuming an average of approximately 110 kWh of electricity per day (including electricity for the workers' domestic use). The project employs two workers, with total monthly operating costs around ¥7,000 RMB, resulting in an estimated annual cost of approximately ¥80,000 RMB. In contrast, a transport-based model, merely hauling the waste to the township transfer station, would incur nearly ¥80,000 RMB in transportation costs alone annually, excluding garbage collection expenses, vehicle maintenance, and other associated fees.
The pyrolysis gasification treatment unit is equipped with a circulating water system, ensuring no wastewater discharge and no significant exhaust gas emissions. The processed ash and slag are screened and repurposed for planting Chinese fir, effectively turning waste into treasure. The treatment station does not impact the surrounding environment. This project provides a long-term and efficient solution for rural household waste management and has received strong support and recognition from the Meidong Village Committee and local residents. This advanced concept of on-site, harmless household waste treatment has also garnered attention from government departments, which have conducted multiple inspections of the project site.
