LIHui-ping,PANGWei-hai,XIELi,et al.Characteristics and Conversion of Organic Carbon Sources during Treatment of Municipal Wastewater with Low Carbon to Nitrogen Ratio[J].China Water & Wastewater,2022,38(7):69-74.
Characteristics and Conversion of Organic Carbon Sources during Treatment of Municipal Wastewater with Low Carbon to Nitrogen Ratio
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第7期
Page:
69-74
Column:
Date of publication:
2022-04-01
- Keywords:
- municipal wastewater; low C/N; organic carbon source; parallel factor; advanced denitrification
- Abstract:
- The carbon to nitrogen ratio (C/N) is one of the main factors affecting the nitrogen removal efficiency of wastewater. To investigate the utilization rate of organic carbon sources with different characteristics in low C/N municipal wastewater treatment, the effluent quality in different treatment stages of a SBR process in a wastewater treatment plant in Guangdong Province was analyzed by using three-dimensional excitation emission matrix and parallel factor analysis (3DEEM-PARAFAC). The 3DEEM-PARAFAC technology could effectively characterize the characteristics change of organic carbon sources in the treatment process of low C/N wastewater, and four fluorescent components were identified, namely tryptophan-like, amino acids, humic acids and fulvic acids. Among them, tryptophan-like and amino acids were biodegradable organic carbon sources with high proportion, while humic acids and fulvic acids belonged to recalcitrant organic carbon sources with low proportion. Correlation analysis showed that there were significant correlations between the four fluorescence components and COD, TP, NH4+-N and TN (p<0.05). Among them, amino acids showed the most significant correlation and was the key substance affecting the denitrification efficiency.
Last Update:
2022-04-01