Abstract：
Eutrophication has led to the widespread occurrence of cyanobacterial blooms. Toxic cyanobacterial blooms with high concentrations of microcystins (MCs) have been identified in the Lalla Takerkoust reservoir in Morocco. The objective of this study was to evaluate the efficiency of the Multi-Soil-Layering (MSL) ecotechnology in removing natural cyanobacterial blooms from the lake. Two MSL pilots were used in rectangular glass tanks (60 × 10 × 70 cm). They consisted of permeable layers (PLs) made of pozzolan and a soil mixture layer (SML) containing local soil, ferrous metal, charcoal and sawdust. The main difference between the two systems was the type of local soil used: sandy soil for MSL1 and clayey soil for MSL2. Both MSL pilots effectively reduced cyanobacterial cell concentrations in the treated water to very low levels (0.09 and 0.001 cells/mL). MSL1 showed a gradual improvement in MC removal from 52 % to 99 %, while MSL2 started higher at 90 % but dropped to 54% before reaching 86%. Both MSL systems significantly reduced organic matter levels (97.2 % for MSL1 and 95.8 % for MSL2). Both MSLs were shown to be effective in removing cyanobacteria, MCs, and organic matter with comparable performance.
摘要：
富营养化导致蓝藻水华的广泛发生。在摩洛哥的LallaTakerkoust水库中发现了具有高浓度微囊藻毒素（MC）的有毒蓝藻水华。这项研究的目的是评估多土壤分层（MSL）生态技术从湖泊中去除天然蓝藻水华的效率。两名MSL飞行员在矩形玻璃罐（60×10×70厘米）中使用。它们由火山灰制成的渗透层（PLs）和含有当地土壤的土壤混合物层（SML）组成，黑色金属,木炭和木屑.两种系统之间的主要区别是使用的当地土壤类型：MSL1的沙质土壤和MSL2的粘性土壤。两个MSL飞行员都有效地将处理过的水中的蓝细菌细胞浓度降低到非常低的水平(0.09和0.001细胞/mL)。MSL1显示MC去除从52%逐渐提高到99%，而MSL2开始上升到90%，但在达到86%之前下降到54%。两种MSL系统均显着降低了有机物含量（MSL1为97.2％，MSL2为95.8％）。两种MSL均显示可有效去除蓝细菌，MC,和具有可比性能的有机物。
