The invention discloses an efficient and environment-friendly malt syrup producing process, which comprises the following steps of
starch size mixing, liquefication, saccharification,
cartridge filtration, membrane decontamination, membrane separation,
ion exchange and vacuum concentration. The process disclosed by the invention has the advantages that glucoamylase can be recycled by an
ultrafiltration membrane device, and the production cost is reduced; impurities such as
colloid,
protein and
pigment in malt syrup can be intercepted by the
ultrafiltration membrane device so as to realize the purification and decontamination of the malt syrup, and an
activated carbon decoloring procedure in the existing process is replaced; and at the same time the load of
ion exchange resin is reduced, the exchange capacity of the resin is improved, the regeneration period of the
ion exchange resin is prolonged, the
discharge of regenerated
sewage is reduced, and the
pollution of the environment is small.