LüJi-teng,WUShu-yun,LIULu-wen,et al.Performance of Filter Packed with Composite Media Consisting of Iron Shavings Coupled with Loofah for Nitrogen and Phosphorus Removal[J].China Water & Wastewater,2023,39(19):89-94.
Performance of Filter Packed with Composite Media Consisting of Iron Shavings Coupled with Loofah for Nitrogen and Phosphorus Removal
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第19期
Page:
89-94
Column:
Date of publication:
2023-10-01
- Abstract:
- This study investigated the mechanism and performance of an advanced treatment process—filter packed with waste iron shavings, loofah and polyurethane for nitrogen and phosphorus removal. When there was no organic carbon source in influent, TN concentration was 16-22 mg/L, TP concentration was 1-1.6 mg/L, and the hydraulic retention time (HRT) was 1-2 h, the filter demonstrated average removal rates of 32.1% and 50.2% for TN and TP, and average denitrification rate of 89 mg/(L·d). The results of X-ray diffraction (XRD) and X-ray fluorescence (XRF) analysis of the deposits produced by iron shavings and the loofah leaching experiment showed that the simultaneous removal of phosphorus and consumption of dissolved oxygen by micro-electrolysis in the iron shavings layer were conducive to the denitrification of the loofah layer. The loofah layer provided slow-release carbon sources required for denitrification, and the excess carbon sources were consumed by the polyurethane layer. The coupling and synergistic nitrogen and phosphorus removal technology packed with multiple composite media provided a new idea for the advanced treatment of wastewater.
Last Update:
2023-10-01