Removal of Phosphorus in Rural Sewage by Calcium Carbonate and Iron-carbon Composite Filler
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
7 7
Page:
93-96
Column:
Date of publication:
2020-04-01
- Keywords:
- rural sewage; phosphorus removal; composite filler; calcium carbonate; iron-carbon micro-electrolysis
- Abstract:
- Calcium carbonate and iron-carbon composite filler (composite filler for short) was proposed to remove TP to solve the problem that rural sewage TP discharge does not reach the standard. The average removal rate of TP was more than 73% when hydraulic retention time (HRT) of the composite filler bed was 4 hours. XRD and XRF analysis showed that OH- produced by the iron-carbon micro-electrolysis in the composite filler promoted calcium carbonate and phosphate to produce calcium hydroxyapatite sediment, which was an important way to remove TP. The removal of TP could be improved by using the composite filler in constructed wetland or biofilter.
Last Update:
2020-04-01