多级生物净化系统浮游植物的分析

利用不同生物的功能特性及其间的协同作用，由水生经济植物浮床、芦苇湿地、固定化微生物膜、底栖软体动物和滤食性鱼类组成了多级生物净化系统，除芦苇湿地、滤食性鱼类外，全部设置在多级生物净化水渠中。不仅充分利用了水面，节约了材料、能源，提高了净化效率，而且有效调控和净化了养殖池塘的水质，实现了养殖排放水的循环利用，提高了养殖效益。结果显示：养殖池塘排放水经过多级生物净化后，浮游植物的生物量控制在69．114-43．832mg／L，平均减少率为13．44％～0．47％，蓝藻平均减少率为58．41％-51．63％。

Phytoplankton Analysis Based on Multiple Bio-treatment System

According to the different functions of various living organisms and their synergistic effects,the multiple bio-treatment system was established.The system consisted of the floating bed of the aquatic economic plants,Phragmites australis wetland,artificial immobilized microbial membranes,benthic molluscs and filter-feeding fish.Except the Phragmites australis wetland and filter-feeding fish,all above were set to the multiple bio-treatment drain conduit.And this not only made full use of the water,saved the materials and energy,improved the purifying efficiency,but also regulated and purified the water quality in the culture ponds effectively,and thus realized the water recycling discharged by the culture ponds,and improved the breeding benefits.The results show that through the purification of the multiple bio-treatment system,the phytoplankton biomass in the discharged water from the breeding ponds was 69.114-43.832 mg/L,which was reduced by 13.44%-0.47% on average.Especially,cyanobacteria was reduced by 58.41%-51.63% on average.