告别煤气罐！我如何用两个蓝色煤气桶和PVC管全年免费获取煤气

In this video, I demonstrate an upgraded DIY biogas system that lets me produce free cooking gas all year round using two blue plastic barrels and simple PVC pipes. I walk through connecting the barrels for stable gas output, arranging the PVC piping to safely and efficiently transport the gas, fermenting organic waste to maintain a steady production rate, and storing, filtering, and using the gas for everyday cooking. I also share practical tips on maintenance, odor control, and ensuring long‑term reliability of the system.