Research On The Key Technology Of Resource Utilization For Dioscorea Zingiberensis C.H. Wright

Based on the cycle economic theory and clean production principle, the resource utilization and clean production of Dioscorea zingiberensis C. H. Wright processing was achieved by imported processing and verified by equipments lab experiment and Pilot production. The conclusions and achievements were summarized as follows:1. Starch and cellulose extraction of Dioscorea zingiberensis C. H. Wright Based on traditional method of sweet potato extraction, the starch and cellulose of Dioscorea zingiberensis C. H. Wright were extracted through three stages, manual, laboratory and machinery extraction & separation. The mulling, belt-pressing, centrifuging and gas flow drying equipments, by which the cellulose, starch and disogenin could be completely extracted and separated, were finally determined. The recovery rate of cellulose and lignose reached 85- 90%, and that of starch was about 90%. And the loss rate of disogenin was under 2%.2. Membrane concentration of Dioscorea zingiberensis C. H. Wright slurry The hydrolization slurry amount was reduced by adopting membrane concentration technology and thus the adding amount of acid and discharge amount of waste water could be decreased. The lab experiment and pilot production showed that the slurry could be concentrated by 5-7 times, the content of solid substance could reach 7% through membrane concentration, and the adding amount of acid was reduced by 50% compared with traditional method.3. Resource utilization of Dioscorea zingiberensis C. H. Wright waste water The treatment of Dioscorea zingiberensis C. H. Wright waste water is of high cost because of high acid content, sugar content and poor biodegradability. In this paper, the lime cream was added in the acidrolysis waste water to neutralize the acid, and 95kg dihydrate per ton wastewater could be recycled. And the hydrolysis carbohydrate in the waste water was concentrated by anti-pollution membrane, and the concentration rate could reach to 10 times. 100kg hydrolysis carbohydrate per ton wastewater could be recycled. The COD of the final water was 30.5 mg/L after secondary ESPA1 membrane treatment. The water reached the highest national emission standard and can be reused.