SUNXiao-yun,LIUJian-guang,ZHONGXue-lian,et al.Effect of Bromide Ion on Formation Potential of Disinfection By?products in Wastewater Treatment Process[J].China Water & Wastewater,2022,38(5):74-80.
Effect of Bromide Ion on Formation Potential of Disinfection By?products in Wastewater Treatment Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第38卷
Number:
第5期
Page:
74-80
Column:
Date of publication:
2022-03-01
- Keywords:
- A2/O process; bromide ion; formation potential of disinfection by?products; trihalomethane; haloacetic acid; 3D-EEM
- Abstract:
- The changes in disinfection by?products (DBPs) precursors and the effect of bromide ion on DBPs types in bromide?containing wastewater from a campus wastewater treatment process were investigated by using the formation potentials of two DBPs:trihalomethane formation potential (THMsFP) and haloacetic acid formation potential (HAAsFP). The secondary treatment based on A2/O process had a good removal performance of DOC and UV254 in wastewater. Profile of the concentration of THMsFP was a decreasing trend along the treatment process, whereas the profile of the concentrations of HAAsFP and SUVA was an increasing trend after secondary treatment. Therefore, soluble small molecular organics with high aromaticity and desaturation were important precursors of HAAs, and bromide?containing disinfection by?products (Br-DBPs) accounted for 50%-65% of the total DBPs. After A2/O treatment,with the increasing of bromide ion concentration from 100 ?g/L to 300 ?g/L, bromide?binding factor (BIF) of THMs increased from 0.5 to 0.8, and the BIF of HAAs increased from 0.51 to 0.62. The concentration of dominated bromide, THMsFP and HAAsFP, showed a trend of gradual increase, that was, the increase of bromide ion concentration transformed DBPs from chlorides to bromides.
Last Update:
2022-03-01