Degradation of Sugars in Fruit Processing Wastewater by Low Temperature Plasma
Article
Figures
Metrics
Preview PDF
Reference
Related
Cited by
Materials
Abstract:
The chemical oxygen demand (CODcr) and sugar content of 12 kinds of carbohydrates were measured by potassium dichromate method and phenol-sulfuric acid method. The change of sugar content and CODcr degradation efficiency of carbohydrates treated by low temperature plasma at different time were compared. Feasibility of treating fruit processing wastewater by body technology.The data show that the CODcr value of carbohydrates has a good linear relationship with their mass concentration and molar concentration. The relationship between the number of C, H, O atoms and CODcr is: 1 mmol (CH2O) CODcr value is 2.49±0.25 mg/L. The phenol sulfuric acid method was used to determine the sugar content. The sugar content and CODcr value of 12 kinds of sugar substances after different treatment time by ozone generator and low temperature plasma showed a downward trend. The CODcr value of the two treatments declined significantly in 10~40 minutes, and tended to be flat after 40 minutes. After 60 minutes of low temperature plasma treatment, CODcr value decreased to 42%~49% of the initial solution CODcr value, sugar content decreased to 44%~59% of the initial solution sugar content; after 60 minutes of ozone generator treatment, CODcr value decreased to 45%~53% of the initial solution CODcr value, sugar content decreased to 49%~65% of the initial solution sugar content. The results showed that the degradation effect of CODcr and the reduction of sugar content after low temperature plasma treatment were better than that of ozone generator, which indicated that low temperature plasma could degrade sugar substances in fruit processing wastewater and improve water quality.
