Abstract:

The enhancement of simulated experiment research on the treatment technology of domestic sewage in sewer lines have been developed,under the following conditions:temperature 20℃,flow rate 0.3 m/s,pH=7.0,density of membranes on suspended carrier 10 L-1,and change the DO and MLSS concentrations. The results show that increasing the DO of water samples to be treated is benefical for the removal of pollutants. When the appropriate DO is 3.0 mg/L,the COD,TN and TP removing rates can reach 67%,21%,12%,respectively. In a certain range,increasing MLSS can continuously improve the cleaning capacity of the treatment system for sewage. When the apppropriate MLSS is 2.0 g/L,the removing rates of COD,TN and TP can reach 60%,40%,15%,respectively.

Key words: sewer lines, domestic sewage, wastewater treatment, technique enhancement

摘要：

在温度20℃、流速0.3 m/s、pH=7.0、挂膜密度为10 L-1条件下，改变DO及MLSS浓度开展下水道处理生物污水技术强化模拟实验。实验结果表明，提高待处理水样的DO，有利于对污染物的去除，适宜的DO为3.0 mg/L，此时系统对COD、TN、TP的去除率分别达到67%、21%、12%；在一定范围内增加MLSS可以持续提高处理系统对污水的净化能力，适宜的MLSS为2.0 g/L，此时COD、TN、TP的去除率分别达到60%、40%、15%。

关键词: 下水道, 生活污水, 废水处理, 技术强化

CLC Number: 

• X703.1