Industrial enzyme preparation and fermentation method

The invention discloses an industrial enzyme preparation and fermentation method which comprises the following steps: taking corncob and bran as raw materials of a culture medium, and simultaneously taking bran, corncob particles and fiber straws consisting of rice straws, wheat straws, soybean straws, corn straws, cotton straws and the like as raw materials for preparing a solid fermentation culture medium; the culture medium used in the industrial enzyme fermentation method is simple and low in cost, the basic fermentation culture medium mainly comprises agricultural by-products or wastes such as bran, various straws and the like, the environmental pollution pressure can be effectively relieved, auxiliary materials are added after fermentation production of cellulase, bran koji for preliminarily forming spores is subjected to water extraction, squeezing and filtering, and the fermentation yield is improved. The contact area between bran koji and water is increased, crude cellulase in the bran koji can be fu