Device and method for preparing ethanol by coupling wastewater denitrification and biogas desulfurization with cassava as raw material

The invention discloses a device and a method for preparing ethanol by coupling wastewater denitrification and biogas desulfurization by taking cassava as a raw material, and relates to the technical field of chemical production, the device comprises a base platform framework, and the top of the base platform framework is provided with a preparation assembly, a saccharification assembly, a fermentation reaction tank, a distillation tower and a reactor group. The positive plate and the negative plate in the positive plate and the negative plate are respectively subjected to electrochemical reaction in the saccharification solution through potential difference, oxidation-reduction reaction of the saccharification solution is promoted, so that the saccharification reaction efficiency is enhanced, meanwhile, the electrochemical reaction of the positive plate and the negative plate is adjusted under the action of the choking coil, and the saccharification reaction efficiency is further improved. Under the cooperat