The invention discloses a
system and method for treating rural
sewage by using an ecological
system based on multi-submerged
plant combinations. From the water inlet to the water outlet, the
system sequentially comprises three regions in a pond, wherein a submerged
plant combination A, which comprises more than any two of
hydrilla, waterweed, Najas minor, curly pondweed and
bog pondweed, is planted in the first treatment region; a submerged
plant combination B, which at least comprises Vallisneria spiralis and vallisneria spinulosa, is planted in the second treatment region; and a submerged plant combination C, which comprises more than any two of
hydrilla, waterweed, Najas minor, Vallisneria spiralis, vallisneria spinulosa, curly pondweed,
bog pondweed, watermilfoil and
hornwort, is planted in the third treatment region. The system and method are simple to implement, have the advantages of low cost and favorable effect, and do not need additional
pipe network engineering and land; and the
effluent water can achieve Grade 1 A above in
Discharge Standard of Pollutants for Municipal
Wastewater Treatment
Plant. The system can be used as a
natural landscape, and has the advantages of high transparency of the
water body, high
biodiversity and high ecological
landscape value.