藻-菌生物膜法改善富营养化水体水质的效果

Method of Algae-Bacterium Biofilm to Improve the Water Quality in Eutrophic Waters

将一种由改性高分子材料制成的人工水草作藻 菌生物膜的载体 ,来改善富营养化水体水质 .2次实验结果表明 :人工水草的布设可以明显抑制藻类的生长 ,在第 11d将水体透明度由 6cm提高到 6 2cm ;对CODMn、TP、TN和NH+ 4 N的削减率依次为 92 89%、4 9 2 5 %、94 97%和 70 15 % ;人工水草的布设对DO也能维持在一定水平 ;当人工水草高度与水深比为 0 7时 ,布设人工水草最经济、适宜的密度范围为 8～ 16株 /m2 .

The quality of eutrophic waters was improved by the algae-bacterium biofilm, which covered over the artificial aquatic mat made from a kind of mend macromolecule material. Two series of experiments show that using the artificial aquatic mat technique, algae bloom was inhibited markedly. At the eleventh day, the transparency was increased from 6 cm to 62 cm; and the concentrations of COD Mn,TP,TN and NH+ 4-N were decreased to 92.89%,49.25%,94.97% and 70.15% respectively. The DO concentration also kept in certain satisfied level for using the algae-bacterium biofilm method. The suitable and economical density was about 8～16 bunchs/m2 when the ratio of the artificial aquatic mat length to water depth was 0.7.