QIAN Meng-jie,LI Xing-qiang,LI Jun.Advanced Denitrification Efficiency of Loofah and Polyurethane Composite Filler[J].China Water & Wastewater,2020,36(15 15):73-77.
Advanced Denitrification Efficiency of Loofah and Polyurethane Composite Filler
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
15 15
Page:
73-77
Column:
Date of publication:
2020-08-01
- Keywords:
- loofah; polyurethane; advanced denitrification; tail water from wastewater treatment plant
- Abstract:
- Tail water from wastewater treatment plant has the problems of high total nitrogen, poor biodegradability, hard to meet surface water Ⅳ class standard after treated by the current technology. Based on characteristic of slow-release carbon source of loofah, modules of loofah, loofahpolyurethane and polyurethane as fillers were used for advanced denitrification. The fillers were firstly immersed and filled in activated sludge of municipal wastewater treatment plant, and then they were continuously applied to treat low C/N ratio simulated wastewater during different phases. During the experiment, NO-3-N could be reduced from 10 mg/L to 1.5 mg/L without additional carbon source in the combined module, and the removal rate reached 80%. The contents of NH3-N and NO-2-N were close to zero, indicating that advanced denitrification without carbon source leakage was realized.
Last Update:
2020-08-01