Effect of Filter Material Size on Removal Efficiency of Iron, Manganese, Ammonia and Turbidity in Groundwater
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
7 7
Page:
47-51
Column:
Date of publication:
2020-04-01
- Keywords:
- biofilter; filter material size; groundwater; iron; manganese; ammonia; turbidity
- Abstract:
- Filter material size is one of the most critical parameters in the design of biofilters. Effects of filter material size on the removal efficiency of iron, manganese, ammonia and turbidity were investigated in three mature biofilters with filter material size of 0.8-1.0 mm, 3-4 mm, 8-10 mm, respectively. The average concentration of total iron in the effluent of 1#，2# and 3# biofilter was 0.020 mg/L, 0.037 mg/L and 0.078 mg/L respectively, the average concentration of manganese was 0.003 0 mg/L, 0.005 1 mg/L and 0.006 7 mg/L respectively, the average concentration of ammonia was 0.022 mg/L, 0.030 mg/L and 0.050 mg/L respectively, and the average concentration of turbidity was 0.28 NTU, 0.69 NTU and 1.32 NTU respectively. Except for effluent turbidity of the 3# biofilter, all other indexes reached the national standard. With the increase of filter material size, the concentration of total iron, manganese, ammonia and turbidity increased obviously along the biofilter depth, and the removal area extended downward. Turbidity was mainly removed in the 0-0.4 m layer of the biofilter．
Last Update:
2020-04-01