Experimental Study On The Purification Effect Of 6 Aquatic Plants And Their Combination On Nutrient Salts In Water

Eutrophication is an important phenomenon that damages the water environment,the research experiment selected Ceratophyllum demersum,Myriophyllum spicatu,Acorus calamus,Canna indica,Pistia stratiotes and Eichhornia crassipes of six kinds of aquatic plants on the effect of nutrient removal in wastewater hydroponic plant test,And the comprehensive evaluation of the purification effect of these 6 aquatic plants was carried out based on the test results.The specific conclusions are as follows:(1)At 80 d of the test cycle aquatic plant purification water quality monitoring tests,the 6 kinds of aquatic plants in high,medium and low concentration wastewater of TN,TP and NH3-N in mass concentration decreased in a certain test cycle and lower than the blank control group,it is concluded that the 6 kinds of plant of total phosphorus,total nitrogen and ammonia nitrogen pollutants has good effect on removal of pollutants and the purification ability of pollutants must remove differences,and through the 6 kinds of aquatic plants and their combination of high,medium and low three different concentration of sewage purification effect analysis get the concentration,the higher the water,aquatic plant purification effect is better.It shows that the purification of nutrient salts by 6 plants is obvious.(2)From the comparison of the removal trend of nutrient salts by six aquatic plants and their combinations,it can be seen that the period of rapid removal of nutrient salts in sewage is the early stage of the experiment,and at the later stage of the experiment,the concentration of nutrient salt in the water gradually increased.The purification effect is the best at the 40th day of the experiment,and the nutrient salt content in the water gradually increases in the last declining stage.(3)From the removal of TN by a single aquatic plant,it can be seen that in high concentration sewage,Acorus calamus has the best removal effect,with a removal rate of 100%.In medium concentration sewage,Acorus calamus had the best removal effect,the removal rate was 100%.Canna indica was removed best in low concentration sewage with a removal rate of 100%.From the removal effect of single aquatic plants on TP,it can be seen that in the high concentration of sewage,Eichhornia crassipes was removed best,the removal rate was 96.43%.In the medium concentration of sewage,Eichhornia crassipes was removed best,with the removal rate of 97.96%.In low concentration sewage,Pistia stratiotes the removal effect of large drift is the best,the removal rate is 93.33%.From the removal effect of single aquatic plants on NH3-N,it can be seen that in high concentration sewage,Acorus calamus has the best removal effect,with a removal rate of 100%.In medium concentration sewage,Acorus calamus has the best removal effect,with a removal rate of 100%.Canna indica was removed best in low concentration sewage with a removal rate of 100%.(4)From the combination of aquatic plants for TN removal effect can be seen that,in wastewater with high concentration,B7 has the best removal effect,with a removal rate of 100%;In medium concentration sewage,B 7 and B8 have the best removal effect,removal rate of 100%;In low concentration sewage,B6 and B7 have the best removal effect,removal rate of 100%.From the combination of aquatic plants for TP removal effect can be seen that in wastewater with high concentration,B1 has the best removal effect,removal rate of 98.45%;In the medium concentration of sewage,B8 has the best removal effect,and the removal rate was 97.31%.In low concentration sewage,B7 has the best removal effect,removal rate of 90.91%.From the combination of aquatic plants of NH3-N removal effect can be seen that,in wastewater with high concentration,B7 has the best removal effect,removal rate is 100%;In medium concentration sewage,B7 and B8 have the best removal effect,removal rate of 100%;In low concentration sewage,B7 and B8 have the best removal effect,removal rate of 100%.Figure[34]table[8]reference[86]...