... formed into a group, the pipe system, the gas purify system and the appliances or electricity generator. ... waste. .For medium size biogas system we design the biogas system, sell all the equipment and products ... , and our customers build the biogas application system themselves.You also need to send a person ... 50, 75 , 100, 200 and 400 cubic meter biogas digester.Reusable STEEL MOULD NECK This equipment ...