ZHANG Duo-ying,LI Wei-guang,GONG Xu-jin,et al.O3-BEAC-UV /Cl Process for Removing Ammonia Nitrogen fromLow Temperature Source Water[J].China Water & Wastewater,2017,33(No.01):1-6.
O3-BEAC-UV /Cl Process for Removing Ammonia Nitrogen fromLow Temperature Source Water
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第33卷
Number:
No.01
Page:
1-6
Column:
Date of publication:
2017-01-01
- Keywords:
- low temperature source water; ammonia nitrogen; bio-enhanced activated carbon; ozone oxidation; ultraviolet /chlorine coupling; novel strain HITLi 7T
- Abstract:
- For removing ammonia nitrogen from low temperature source water，the novel strain( Acinetobacter harbinensis HITLi 7T) ，the patent strains and the microbial agent were used to constructthe dominant bacterial community for removing ammonia nitrogen at low temperature，which formed thebio-enhanced activated carbon ( BEAC) filter process． Acinetobacter harbinensis HITLi 7T accounted for80% of the total quantity of the dominant bacterial community． The ozone ( O3 ) oxidation was set beforethe BEAC filter． The ultraviolet /chlorine ( UV /Cl) was used after the BEAC filter． A novel process，O3-BEAC-UV/Cl，was constructed． The novel process was run under four different conditions for confirmingthe optimal operational parameters． The disinfection by-products ( DBPs) in the novel process were ana-lyzed． The results showed that addition of ozone could improve the biodegradable dissolved organic carbon( BDOC) in water，which could increase the removal rate of ammonia nitrogen by the BEAC process． Thenovel process could remove ammonia nitrogen in source water from 1 － 2 mg /L to 0． 2 － 0． 3 mg /L at 0 to1 ℃ when ozone dosage was 1 to 2 mg /L，Cl /N ratio was 3 to 4，and ultraviolet strength was 15 mW/cm2． The DBPs produced from O3-BEAC-UV/Cl process were much lower than the drinking water stand-ard． The outflow quality from O3-BEAC-UV/Cl process could meet the requirements of the Standards forDrinking Water Quality ( GB 5749 － 2006) ．
Last Update:
2017-01-01