Abstract:

Acorus calamus has good purification effect on the waste water, scirpus validus, rumex acetosa and iris tectorum had purification effect also. The best combination with Acorus calamus will be found with good purification effect on the waste water from livestock and poultry products, that will be popularized and applied in production. Both Acorus calamus and the other three plants, including Scirpus validus, Rumex acetosa, Iris tectorum, respectively were chosen as experimental group, blank test with sand and without plant was chosen as matched group. The 9 index before and after test were determined. The results showed that all of plants of the selected 3 combination grew well in the waste water and had good removal efficiency of 3 types of nitrogen, nitrogen and phosphorus, and COD. The best of purification ability of ammonia nitrogen and nitrite nitrogen was the combination of Iris-calamus, the degradation rate of 90.35%, 51.91%. Iris-Rumex had the best purification ability of, nitrate nitrogen from the livestock and poultry products effluent with the degradation rate of 14.24%. Among combinations of 3 kinds of plants, Acorus calamus and Scirpus validus had the highest removal efficiency on total phosphorus purification compared with the control group, the average TP removal rate was increased by 4% as well. Acorusand Irisacid modules, Acorus and Rumex had the highest removal efficiency on COD purification compared with the control group, and the average COD removal rate were increased by 0.36% and 0.29%, respectively.