Abstract
The methods of dosing composite microbial inoculants are used in vertical flow constructed wetlands for biofortification. The removal of the main pollution indicators by substrate microorganisms was studied. The results show that compared with the blank system, the number of bacteria and nitrifying bacteria was higher in the substrate of constructed wetland by biofortification. At the hydraulic loading rate (HLR) of about 0.8 m3/(m2·d), relationship between total number of bacteria and the removal rate of COD was significant in Device A and Device B. Relationship with TP removal rate is not evident. Correlation between the number of nitrifying bacteria and TN removal rate was obvious. The biofortification is feasible on technology and economy.
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