Device and process for synchronously removing hydrogen sulfide in biogas and fermentation liquor

The invention discloses a device and a process for synchronously removing hydrogen sulfide in biogas and fermentation liquor, and provides the following technical scheme for solving the problem that anaerobic fermentation can be influenced by introducing a large amount of air for desulfurization in the prior art: an anaerobic fermentation tank is connected with a biogas multi-component analyzer, a low-pressure gas mixing device and a fermentation liquor ORP analyzer; a pre-desulfurization biogas pipeline and a post-desulfurization biogas pipeline are respectively arranged at two ends of the anaerobic fermentation tank, a biogas flow meter is arranged on the pre-desulfurization biogas pipeline to record the biogas circulation amount, the other end of the biogas flow meter is connected with a PID (Proportion Integration Differentiation) controller, and the PID controller is connected with a variable-frequency air fan; an air fan outlet arranged at the outer end of the variable-frequency air fan is respectively