ZHU Lei,TANG Hai,YIN Jiu-long,et al.Treatment Efficiency of Micro-polluted Water Body with Low C/N Ratio by mZVIP/CRI Coupled System[J].China Water & Wastewater,2020,36(19 19):24-31.
Treatment Efficiency of Micro-polluted Water Body with Low C/N Ratio by mZVIP/CRI Coupled System
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
19 19
Page:
24-31
Column:
Date of publication:
2020-10-01
- Keywords:
- micro-polluted water body; constructed rapid infiltration; micro zero valent iron powder; low C/N ratio
- Abstract:
- Aiming at the problems of water quality safety and eutrophication caused by low C/N ratio micro-polluted water body, the advanced treatment efficiency of micro-polluted water body by a coupled system of micro zero valent iron powder (mZVIP) and constructed rapid infiltration (CRI) was explored. Effects of mZVIP volume ratio, wet-dry ratio and hydraulic load cycle on the removal of COD, NH4+-N, TN and TP by the mZVIP/CRI system were investigated, and the optimal operating conditions of the system were determined. The optimal operating conditions of the coupled system were as follows: wet-dry ratio of 1 ∶3, hydraulic load cycle of 24 hours and mZVIP volume ratio of 10%, and the average concentrations of COD,NH4+-N, TN and TP in effluent were (9.88±2.04) mg/L, (0.20±0.05) mg/L, (13.84±0.93) mg/L and (0.071±0.011) mg/L, respectively. Compared with traditional CRI system, the removal efficiencies were improved by 12.66%, 13.30%, 20.73% and 4.24%, respectively. The effluent quality met the first level A criteria specified in the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB 18918-2002), indicating that the coupled system was feasible to treat micro-polluted water body with low C/N ratio.
Last Update:
2020-10-01