LIPei-qi,HUANGTing-lin,YANJun-le,et al.Pilot Study on Efficient Removal of Organic Matters in Low-turbidity Surface Water at Low Temperature[J].China Water & Wastewater,2023,39(13):47-53.
Pilot Study on Efficient Removal of Organic Matters in Low-turbidity Surface Water at Low Temperature
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第13期
Page:
47-53
Column:
Date of publication:
2023-07-01
- Keywords:
- low temperature and low turbidity water; flocculation; precipitation; air floatation; pre-oxidation
- Abstract:
- This paper established two pilot processes including grid flocculation combined with inclined tube precipitation and mechanical flocculation combined with air flotation, and investigated the performance and mechanism of the two processes and pre-oxidation enhanced coagulation precipitation for removing organic matters from low-turbidity water at low temperature, so as to improve the treatment ability of organic matters from low-turbidity surface water at low temperature in drinking water plants in Northwest China. The grid flocculation and inclined tube precipitation process showed better performances for turbidity, CODMn, UV254 and DOC removal, and its total operating cost was 0.068 yuan/m3, which was lower than 0.180 yuan/m3 of mechanical flocculation and air flotation process. On this basis, potassium ferrate, potassium permanganate and chlorine dioxide were selected to enhance the pre-oxidization of the grid flocculation and inclined tube precipitation process. The removal performance of organic matters was the best when the dosage of potassium permanganate was 0.6 mg/L. The results of EEMs parallel factor analysis showed that different pre-oxidizing agents had different effects on the removal of different organic compounds.
Last Update:
2023-07-01