Title :
Study on anoxic-oxic process treating for dioscorea zingiberensis wastewater
Author :
Lu, Yanjun ; Guo, Jifeng
Author_Institution :
Sch. of Civil Eng., Xi´an Technol. Univ., Xi´an, China
Abstract :
The purpose of this paper was to investigate the characteristics of anoxic-oxic (A/O) process treating for dioscorea zingiberensis wastewater. Calcium oxide was added into the wastewater to adjust the pH value in the pretreatment, the 0.45g/L calcium oxide concentration was chosen as the optimum concentration. The average B/C (BOD/COD) value in the influent of A reactor was 0.35, and after the treatment, the average B/C value was 0.5. The results showed that the biodegradability of the wastewater was improved in A tank. The problems of foam, white sludge and sludge bulking also were discussed in the paper. The ammonia nitrogen and total nitrogen removal rate were 87.7% and 77.5% by the A/O process, the results showed that the A/O process had a good effect to nitrogen removal and the A reactor A/O played the major role in the nitrogen removal.
Keywords :
ammonia; environmental degradation; foams; nitrogen; pH; sludge treatment; toxicology; vegetation; wastewater treatment; A/O process; BOD value; COD value; ammonia nitrogen; anoxic-oxic process; calcium oxide concentration; dioscorea zingiberensis wastewater treatment; foam; influent; pH value; sludge bulking; total nitrogen removal rate; wastewater biodegradability; white sludge; Calcium; Effluents; Inductors; Microorganisms; Nitrogen; Wastewater; anoxic-oxic process; dioscorea zingiberensis wastewater; nitrogen removal;
Conference_Titel :
Water Resource and Environmental Protection (ISWREP), 2011 International Symposium on
Conference_Location :
Xi´an
Print_ISBN :
978-1-61284-339-1
DOI :
10.1109/ISWREP.2011.5893288
