NUTRIENT BALANCE IN AEROBIC BIOLOGICAL TREATMENT OF TANNERY WASTEWATER

作者：Zhou, Jianfei; Wang, Ya-Nan^*; Zhang, Wenhua; Shi, Bi

来源：Journal of the American Leather Chemists Association, 2014, 109(5): 154-160.

• ACTIVATED-SLUDGE
• PERFORMANCE
• NITROGEN
• REMOVAL

The effect of nutrient composition of tannery wastewater on aerobic biological treatment, particularly on the removal of ammonia nitrogen (NH3-N) and total nitrogen (TN) was investigated based on the theory of nutrient balance. During the biological treatment of conventional tannery wastewater, total organic carbon (TOC) and total phosphorus (TP) were almost exhausted. However, the removal of TN was unsatisfactory, suggesting that tannery wastewater contains excessive N source and insufficient C and P sources. When extra C and P sources were added together into the wastewater, the removals of NH3-N and TN increased significantly. Under the optimal ratio of TOC:TN:TP (10:1:0.2), the removals of NH3-N and TN were 100% and 80%, respectively, and the added C and P sources were almost consumed by activated sludge. This means that a good nutrient balance was achieved in this condition. Accordingly, when ammonium salts are replaced by organic acids and phosphates in the deliming and bating processes, it is reasonable to assume that the change of wastewater composition would favor the aerobic biological treatment of wastewater.

• 出版日期2014-5
• 单位四川大学