摘要
研究了根据不同生物的功能特性及其间的协同作用,建立的由芦苇湿地、沉水植被群落、人工基质固定化微生物膜、软体底栖动物和滤食性鱼类组成的自净型多级生物修复系统,对养殖塘环境改善情况。结果显示:与实施修复前的系统相比,营养盐NO2-N、NO3-N和PO4-P的去除率分别达87.46%、62.99%和75.74%;浮游动、植物的生物量分别减少92.83%和15.90%。养殖塘排水营养盐NO2-N、NO3-N和PO4-P的去除率分别为27%～96%(年均87%)、37%～84%(年均84%)和30%～17%(年均9%),CODMn的去除率为1%～17%(年均9%)。经系统多级处理后水体透明度分别提高了75%和17%,最高值达52 cm。浮游植物生物量平均减少63.93%,尤其是蓝藻,平均减少68.17%。浮游植物群落结构转好,硅藻大量繁殖,成为优势种。浮游动物群落结构也由小型原生动物占优向大型枝角类、轮虫转变。受控于滤食性鱼类,浮游动物生物量维持在较低水平。
According to the different functions of various living organisms and their synergistic effects,a self-purification multiple bio-treatment system was established.The system consisted of Phragmites australis beds,submerged plant communities,artificial immobilized microbial membranes,benthic molluscs and filter-feeding fish,utilized the nutrients in the water body,and finally improved the environment of the culure ponds.After comparing the system between pre-and post-treatment,the removal rates of NO2-N,NO3-N and PO4-P were up to 87.46%,62.99% and 75.74%,respectively.The biomass of zooplankton and phytoplankton was reduced by 92.83% and 15.90%,respectively.After the multiple treatment by the system,the concentrations of NO2-N,NO3-N and PO4-P in the outflow were reduced by 27%～96%（on the average of 87%）,37%～84%（on the average of 84%） and 30%～17%（on the average of 9%）,respectively.The removal rate of CODMn was between 1%～17%（on the average of 9%）.Water transparency increased by 75% and 17% with the maximum of 52 cm.Phytoplankton biomass was reduced by 63.93% on average,especially cyanobacteria which was reduced by 68.17% on average.The succession of phytoplankton community structure took a turn for the better.The diatom multiplied and gradually became the dominant species.The dominant taxa of zooplankton community changed from small-size protozoa to large-size taxa,i.e.cladocera and rofitera.The zooplankton biomass,inhibited by the filter-feeding fish,maintained at a low level.
出处
《淡水渔业》
CSCD
北大核心
2010年第3期36-43,共8页
Freshwater Fisheries
基金
天津市农业科技成果转化与推广项目(0604150)
关键词
养殖塘
浮游生物
水化学
自净型多级生物修复系统
生物修复
culture pond
plankton
water chemistry
self-purification multiple bio-treatment system
bioremediation
