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| Experimental study on rapid recovery of low temperature biological iron and manganese removal process |
| WANG Yu-lin1, LI Dong1, YANG Hang2, ZENG Hui-ping1, ZHANG Jie1,2 |
1. Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China;
2. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China |
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Abstract In order to achieve the rapid recovery of biological iron and manganese removal process in the low-temperature (3~5℃), three kinds of recovery methods, including different filtration methods of the upper and lower flow, changing the the influent iron concentration and adding inorganic carbon, were adopted to study the recovery effect on the damaged biological filter column. The results showed that three recovery methods could effectively shorten the recovery time of biological filter column and the recovery times were 40, 54 and 35d, Compared with the conventional recovery mode of 2# filter column, the recovery times of 1# and 3# filter column were shortened by 26%, 35%. Although the recovery time was longer by the way to change the concentration of iron and manganese, but the manganese removal performance after the recovery of the filter column was more stable. From comprehensive consideration of the recovery effect and economic rationality, It was suggested that the best way to recover damaged filter column was iron and manganese concentration increased from low to high and adding inorganic carbon when the filtration rate to 2~3m/h.
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Received: 09 May 2017
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