Regulation and control system for biogas fermentation process

The invention discloses a regulation and control system for the biogas fermentation process and a using method thereof and relates to the technical field of biological fermentation. The system is communicated with a feeding device and a biogas fermentation tank by pipelines; the biogas fermentation tank is communicated with a composite biological preparation adding device; an online pH meter and a liquid sampling device are arranged in the biogas fermentation tank; the online pH meter and the liquid sampling device are connected with a data detection device and a pH daily reduction value, a ratio (P/A) of concentration of acetic acid to concentration of propionic acid and a ratio (IA/BA) of alkalinity of volatile fatty acids to alkalinity of bicarbonate are obtained by detection; obtained data is input into a main controller; biogas fermentation process regulation and control software is arranged in the main controller; the main controller is connected with a PLC (Programmable Logic Controller) controller to regulate addition of a feed; a user sets parameters for the main controller to operate the system; and the main controller automatically judges to regulate and control the feed according to comparison of the data and the set parameters. The system can have high volume gas productivity and also can avoid serious acidification of a biogas fermentation system to the greatest extent.