Study on Environmental Materials with Wastewater on Yielding Water Quality and Starch Quality Based on Influence of Recycling Ratio of Sweet Potato Starch Production

Abstract

In order to improve sweet potato starch production technique of small-scale plant and decrease the discharge of pollutant in production wastewater, the yielding water of starch production was treated efficiently by the new environment materials and technology. Subsequently, the treated wastewater was circulated and reused in starch producing process. The results showed that the quantity of starch wastewater was decreased. When the recycle ratio is below 30%, the starch quality was hardly influenced. When the recycle ratio is above 50%, the pollutants in wastewater increased significantly, starch yield dropped nearly to 50% and starch acidity exceeded the national standard. Finally, wastewater reuse ratio should be controlled below 30%.