Comparative study on the purification effects of domestic sewage by using four hydroponic plants
Due to excessive practical activities of human beings, huge discharge of domestic sewage leads to the eutrophication of water, which has become a high-profile issue. Four common ornamental plants of hyacinth, chlorophytum, narcissus and rich bamboo are selected as the test objects of hydroponics, and total nitrogen (TN) and total phosphorus (TP) removal efficiencies, the chemical oxygen demand (CODcr) remoral rate of the simulated sewage (bad V class) are the water purification indications. The results show that the four plants are normal and there is a good survival purification capacity under simulated conditions. The removal rate of total nitrogen followed by daffodils > hyacinth > chlorophytum > rich bamboo, which are 66. 8％, 65. 8％, 73. 5％, 59. 5％, in addition to lucky bamboo, the purifying effect was obvious; The removal of total phosphorus of water are more than 90％, the purifying effect is remarkable. The removal rates of CODcr were 57. 51％, 49. 05％, 60. 19％, 44. 06％; removal rates are higher than non-treated control tests. The results can provide experimental basis for the use of urban ornamental plants to control water pollution by urban domestic sewage.
NETL
NSTL
万方数据
维普
