An in-situ remediation method for water in a black and odorous river comprises steps as follows: (1),
pollution indexes of the water in the river are detected; (2), the river is pre-treated, the water in the black and odorous river is oxygenized in a biological
oxygen enrichment method, and the concentration of dissolved
oxygen in a river aquatic
system is kept between 2 mg / L and 8 mg / l; (3), carbon
fiber ecological grass is laid in the black and odorous river in the downstream direction, one end of the carbon
fiber ecological grass is fixed on an iron framework, the iron framework is fixed at the bottom of the river through a weight or an anchor, and the laying density of the carbon
fiber ecological grass is 40 cm<2> / L after
biofilm formation; (4), after primary
biofilm formation of the carbon fiber ecological grass in 3-5 days, cultured
indigenous microorganisms are sprayed to starting ends of different
water area sections of the black and odorous river in a
liquid water-surface spraying manner, the
microorganism feeding area accounts for 41% of the
water area, and the ratio of fed microorganisms to water amount in areas with different
water quality is (2-5):104. The in-situ remediation method solves the increasingly serious blackening and
odor problem of the river, and the water remediation method is low in development cost and operation expense and safe.