螺蚌和沉水植物搭配对微污染水体的净化作用

Role of snails,mussels and submerged plants in purifying micro-polluted water

通过开展单植不同种类沉水植物及"不同种类的沉水植物+螺蚌"组合搭配对微污染水体的净化能力对比研究,寻求系统稳定性最好、水质净化最佳的组合。2013年8月至2014年3月间的水箱小试研究结果表明,"铜锈环棱螺+椭圆背角无齿蚌+轮叶黑藻+篦齿眼子菜"组合的水质净化作用最佳,对CO D、TN、TP去除率分别为58.79%、64.30%和88.57%,对浮游生物的抑制效果最明显,水箱里基本无水绵及浮萍生长,轮叶黑藻长势较篦齿眼子菜好、生长逐渐占优势。2014年5月—8月的中试研究进一步验证水箱小试的结论,COD、TN和TP的平均去除率分别为57.93%、60.12%和49.28%,轮叶黑藻长势更好。

In this study,by using submerged plants and ＂different types of submerged plants ＋ snails ＋mussels＂combination,we compared their purification effect on the micro-polluted water. Different purification systems were tested to determine which combination is best. From August 2013 to March 2014,test results showed that a combination of ＂Bellamya aeruginosa ＋ Anodontawoodianaelliptica ＋ Hydrilla verticillata ＋ Potamogeton pectinatus. ＂had the best removal rates of 58. 79% of COD,64. 30% of TP,88. 57% of TP. This combination suppressed weed growth as well,limiting spirogyra and duckweed in the tank. Hydrilla verticillata grew better than Potamogeton pectinatus,and its growth was gradually dominant. A pilot study from May to August in 2014 further validated the conclusions of the small test tanks with average removal rates of 57. 93% of COD,60. 12% of TN,49. 28% of TP,Hydrilla verticillata also grew better than Potamogeton pectinatus in field plots.