The invention relates to the technical field of ecological restoration of
water environment, and especially relates to a biological and ecological restoration
system of eutrophic rivers and lakes. Ecological floating beds are laid along a
bank, the water surface coverage rate of the floating beds is 15-20%, and each of the floating beds consists of a floating plate, planting baskets, a planting basket filler, floating
bed plants, a nylon net, immobilized
microorganism particles, a biological filler and artificial waterweeds. The planting baskets are placed in the planting basket holes of the floating plate, the planting basket filler is arranged in the planting baskets, the floating
bed plants are planted in the planting basket filler, the nylon net suspends below the floating plate, the immobilized
microorganism particles suspend between
plant roots, the biological filler suspends below the nylon net, the artificial waterweeds are planted at the water bottom, and submerged plants are properly planted in a
water area with two times in the transparency. The
system has the advantages of simple and economic carrier, high strength, good durability, reliable planting,
natural water ecological landscape, and
engineering water quality improvement; and compared with systems in the prior art, the
system focuses on the ecological restoration and construction of river and
lake water, realizes the
self purification, self regulation and
self maintenance of pollutants in a certain concentration range, and is an effective way to improve the
water quality without all-basin
pollutant interception at the present stage.