黄岩县城关镇桥上街,发现一口建造于一九三二年的沼气池。据中国沼气历史考察组专家考证,这是我国最早建造使用的沼气池之一。这口沼气池呈长方形,二十立方米大,钢筋混凝土结构。设有发酵间、水压问、进出料口,还装有木质搅拌器,配套较为完整。建造这口沼气池的主人叫王万顺,当时在这里经营大米生意。一九三二年,他请来上海中华国瑞瓦斯总行的一位技术人员,设计建造了这口沼气池, A biogas plant built in 1932 was found on Qiaoshang Street, Chengguan Town, Huangyan County. According to the research of China’s biogas history inspection group, this is one of the earliest biogas digesters used in China. This biogas digester is rectangular, 20 cubic meters large and has a reinforced concrete structure. There is a fermentation room, water pressure, inlet and outlet, and wooden stirrer. Wang Wanshun, the owner of the biogas plant, built the rice business here. In 1932, he invited a technical person from the head office of the Shanghai China Rewas to design and construct the biogas digester.