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The whole,earthworms artificial wetlands because the upper dissolved oxygen rich,plant root growth-intensive and earthworms enrichment,the bacteria,lower than the number of nitrifying bacteria,and the number of denitrifying bacteria in the lower and middle classes more.Top of the average number of various types of bacteria than the control wetlands than 2 to 2.9 times lower than 1.1 to 1.3 times.
Through the wetland plants to absorb,store accounts for removal of TN TN removal of 11.3 percent.Earthworms assimilation of the TN removal of 4.2 percent.Microbial nitrification / denitrification undercurrent wetland is the main form of nitrogen,the removal of the TN accounts for 53.6 percent.Earthworm artificial wetlands,plant and animal absorption is not the main form of nitrogen,mainly through the earthworm for microbial life activities to raise the number of nitrogen removal efficiency.
At the same time,earthworms wetland bring high economic efficiency is very clear,low-cost infrastructure,management,maintenance is simple,there is still a certain output of the earthworm the economic value.