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为研究观赏植物对沼液的净化能力,以滴水观音、水仙、红掌、白掌、万年青、绿萝、风信子为研究对象,通过沼液水培实验,对比分析了不同植物的生长特性及其对污染物的去除效果。结果表明,万年青、白掌、红掌和滴水观音的相对生长量和适应能力明显优于其他植物;随着处理时间的延长,大部分植物对COD的去除率呈增加趋势,最终达80%左右;在处理时间为7 d时,红掌、白掌和万年青对TN的去除率均达到80%以上;7种植物对沼液中TP的去除率在整个水培期间均未超过60%。各植物对污染物的去除效果均显著优于空白组(p<0.05),且不同种类的植物之间差异明显(p<0.05)。实验表明,万年青、红掌、白掌可作为处理沼液的备选观赏植物。
In order to study the ability of ornamental plants to purify biogas slurry, dripping water Guanyin, Narcissus, Anthurium, white palm, Evergreen, Ligustrum lucidum and Hyacinth were taken as research objects. The biogas culture experiment was used to compare the growth characteristics of different plants and their The removal of pollutants. The results showed that the relative growth and adaptability of evergreen, white palm, anthurium and drip Guanyin were significantly better than those of other plants. With the extension of treatment time, the removal rates of COD of most plants showed an increasing tendency, reaching about 80% When the treatment time was 7 days, the removal rate of TN by anthurium, white palm and evergreen reached above 80%. The removal rate of TP in biogas slurry of 7 species did not exceed 60% during the whole hydroponics. The removal efficiency of pollutants by each plant was significantly better than that of the control group (p <0.05), and the differences among different plant species were significant (p <0.05). Experiments show that evergreen, anthurium, white palm can be used as alternative ornamental plants to deal with biogas slurry.