几种植物对水产养殖废水的修复效果

文章研究了凤眼莲、轮叶黑藻、香根草和水蕹菜四种水生植物在亚热带气候条件下净化水产养殖废水的效果,跟踪比较了一个月之内它们处理污水时,水体氮、磷、化学需氧量、pH值和溶解氧的变化,并对实验前后植物鲜重做了比较。结果表明:(1)4种植物均能强化水产养殖废水污染物的去除,但各有特点;(2)理论上凤眼莲和轮叶黑藻可在处理废水时相互搭配弥补不足,维持水体中性和较高的DO;(3)植物对废水经过2~3周的处理后,水质明显变好,而植物生长开始减退,应及时收割补种;(4)夏季用水生蕹菜处理废水,不仅改善了水质还能收菜创经济效益。研究结果为探索广东地区在构建人工湿地处理水产养殖废水时植物的选择提供了新的科学依据。

Repairing Effect of Several Plants on the Aquaculture Wastewate of Fisheries

In this paper,the purification efficiencies of the aquaculture wastewate of fisheries were studied with Water hyacinth,Hydrilla,Vetiver,and Ipomoea aquatica in subtropical region.Seveval related indicators were monitored during this test in one month,they were nitrogen(N),phosphoru(P)、chemical oxygen demand(COD)、pH value、the dissolved oxygen(DO)and plant fresh weight.Results showed that:(1)The four plants are able to strengthen pollutants removing from the wastewater and have their own characteristics.(2)In theory,Water hyacinth and Hydrilla can be with each other in dealing with wastewater in order to maintain pH neutral and higher DO.(3)After 2~3 weeks treatment,water quality were significantly changed for the better while plants growth begin to slow down,so they were need to remove and replant timely(4)Purificating wastewater with Ipomoea aquatica in summer not only improved water quality but also create economic benefits.Study results provide a new scientific basis to explore plants choice in building artificial wetlands for wastewater treatment in Guangdong region.