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Influence of filter media depth and vegetation on Faecal Coliform removal by stormwater biofilters
Author(s) -
Bu Chun Hooi,
Lai Sai Hin,
Goh Xiang Ting,
Chong Wen Tong,
Chin Ren Jie
Publication year - 2021
Publication title -
water and environment journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 37
eISSN - 1747-6593
pISSN - 1747-6585
DOI - 10.1111/wej.12618
Subject(s) - biofilter , stormwater , environmental science , environmental engineering , vegetation (pathology) , filter (signal processing) , pulp and paper industry , biology , surface runoff , ecology , engineering , medicine , pathology , electrical engineering
Biofilters are promising technologies that widely applied in the treatment of urban stormwater. However, the microbial removal capacity performance depends greatly on the design of biofilters. Hence, this laboratory study attempts to investigate the influence of filter media depths (i.e. 150, 250, 350 and 450 mm) and the variation of native plants, that is, Cow Grass ( Axonopus compressus ) and Pearl Grass ( Axonopus compressus, dwarf) in removing stormwater microorganism particularly Faecal Coliform (FC). Findings showed that a minimum media depth of 300 mm was required to achieve >1 log FC removal. The mean removal of FC at 450 mm depth filter exceeded 2 log for both Cow and Pearl grass biofilter columns. Results showed that there was no statistically significant difference in vegetation type on the performance of FC removal, however, Cow grass biofilter column revealed higher FC mean log removal compared to Pearl grass biofilter column.