期刊论文详细信息
International Journal of Environmental Research and Public Health
Do Wet-Dry Ratio and Fe-Mn System Affect Oxidation-Reduction Potential Nonlinearly in the Subsurface Wastewater Infiltration Systems?
Yinghua Li1  Zhongxin Yang1  Xiaorong Zhang1  Jianing Bai1  Haibo Li1  Fei Guo1 
[1] School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China;
关键词: wet-dry ratios;    ORP;    SWIS;    redox microenvironment;    Fe-Mn system;   
DOI  :  10.3390/ijerph15122790
来源: DOAJ
【 摘 要 】

To understand characteristics of on-line oxidation-reduction potential (ORP) in a subsurface wastewater infiltration system (SWIS) under different intermittent influent conditions, ORP among five matrix depths at wet-dry ratios (Rwds) of 2:1, 1:1 and 1:2 with a hydraulic load of 0.10 m3·(m2·d)−1 were monitored. Results showed that the optimal Rwd for the SWIS was 1:1. In that case, ORP at 40 and 65 cm depths changed significantly, by 529 mV and 261 mV, respectively, from the inflow period to the dry period, which was conducive to the recovery of the oxidation environment. It was concluded that ORP varied nonlinearly in strongly aerobic and hypoxic environment. Wastewater was fed into the SWIS at 80 cm and dissolved oxygen diffused at the initial period of one cycle. As a consequence, ORP at 65 cm increased with water content increasing. However, ORP at 40 and 95 cm displayed inverse trends. Moreover, results showed that ORP decreased with Fe2+ and Mn2+ increasing under aerobic conditions (p < 0.05) because Fe2+ and Mn2+ moved with wastewater flow. Effluent met reuse requirements and no clogging was found in the SWIS during the operation.

【 授权许可】

Unknown   

  文献评价指标  
  下载次数:0次 浏览次数:0次