Tertiary treatment of textile wastewater with combined media biological aerated filter (CMBAF) at different hydraulic loadings and dissolved oxygen concentrations.
Tertiary treatment of textile wastewater with combined media biological aerated filter (CMBAF) at different hydraulic loadings and dissolved oxygen concentrations.
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DOI：
10.1016/j.jhazmat.2008.02.100
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发表时间：
2008-12
影响因子：
13.6
通讯作者：
Fang Liu;Chaocheng Zhao;Dongfeng Zhao;Guoxiong Liu
中科院分区：
文献类型：
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作者：
Fang Liu;Chaocheng Zhao;Dongfeng Zhao;Guoxiong Liu
采用两层填料的上流式曝气生物滤池对纺织废水二级出水中进行三级处理。在稳态条件下，反应器运行良好，出水COD平均为31 mg/L，氨氮平均为2 mg/L，总氮平均为8 mg/L。对于固定的溶解氧（DO）浓度，水力负荷的增加导致基质去除量的减少。随着水力负荷从0.13增加到0.78m3/（m2 h），COD、NH 4 +-N和TN的去除率均呈下降趋势，分别从52%下降到38%、90%下降到68%和45%下降到33%。此外，试验结果还证实了DO浓度的增加会导致COD和NH 4 +-N去除率的提高，而TN去除率则没有这种变化趋势。随着DO浓度从2.4 mg/L增加到6.1 mg/L，COD和NH 4 +-N的去除率分别为39-53%和64- 88%，TN的去除率从39%增加到42%，然后下降到35%.
An up-flow biological aerated filter packed with two layers media was employed for tertiary treatment of textile wastewater secondary effluent. Under steady state conditions, good performance of the reactor was achieved and the average COD, NH4+–N and total nitrogen (TN) in the effluent were 31, 2 and 8mg/L, respectively. For a fixed dissolved oxygen (DO) concentration, an increase of hydraulic loading resulted in a decrease in substrate removal. With the increase of hydraulic loadings from 0.13 to 0.78m3/(m2h), the removal efficiencies of COD, NH4+–N and TN all decreased, which dropped from 52 to 38%, from 90 to 68% and from 45 to 33%, respectively. In addition, the results also confirmed that the increase of COD and NH4+–N removal efficiencies resulted from the increase of DO concentrations, but this variation trend was not observed for TN removal. With the increase of DO concentrations from 2.4 to 6.1mg/L, the removal efficiencies of COD and NH4+–N were 39–53% and 64–88%, whenas TN removal efficiencies increased from 39 to 42% and then dropped to 35%.