Method for recovering inorganic salt from high-salt-content modified starch wastewater

The invention discloses a method for recovering inorganic salt from high-salt-content modified starch wastewater, and relates to the technical field of environmental protection. The method comprises the following steps of: carrying out primary filtration on high-salt-content modified starch wastewater, and filtering out large granular starch in the wastewater; carrying out advanced filtration on the wastewater subjected to the primary filtration to obtain wastewater containing inorganic salts; evaporating and crystallizing the wastewater containing the inorganic salts, recovering the inorganicsalts, simultaneously cooling the evaporated water, recovering, cooling the crystallization mother liquor, performing biochemical treatment, and discharging after reaching the standard. The method comprises the following steps: firstly, carrying out primary filtration on the high-salt-content modified starch wastewater, filtering the large granular starch for recovering and using, then carrying out advanced filtration to