【摘要】 当用凤眼莲净化印染废水,且停留时间为4天时,根部灭菌的凤眼莲的氧化缸和无凤眼莲的氧化缸对COD的去除分别为13％、15％。相比之下,未灭菌的凤眼莲氧化缸靠其根部微生态系统的协同净化作用,对COD的去除率可达35％,当废水停留时间为8天时,此项去除率达46％。三者对PVA、表面活性剂、印染废水中常见的几种染料的去除率也与上述情况相似。不能为凤眼莲直接吸改的有机物,特別是易礙聚的污染物首先被粘附、吸着、固定到根部,然后由根系微生态系统的强大净化作用降解。更多还原

【Abstract】 It has been proved that there is a root microecosystem in the process of dyeing wastewater treatment by the hyacinth. With fout days’ retention, the percentage of COD removal in the oxidation tank, where the hyacinth was planted and its root sterilized with chloride, was 13%. However the percentage of COD removal in ordinary biological oxidation pond without the hyacinth was 15%. In comparison with this, a water hyacinth oxidation tank without sterilization showed -higher COD removal percentage of 35% due to existence of a root microecosystem. Similar results were obtained when wastewater containing PVC, detergent and some dyes were treated with the three methods mentioned above. Some organic compounds that could scarcely be absorbed by the hyacinth, for example, those easy to be coagulated or floc-cules, could be sticked and fixed on the root surface, and then degraded by the root microecosystem.更多还原