Black and odorous river sediment in-situ repairing agent and preparation and repairing method thereof

Abstract

The invention discloses a black and odorous river sediment in-situ repairing agent and a preparation and repairing method, the black and odorous river sediment in-situ repairing agent comprises a carbon substrate, the carbon substrate comprises 40-50 parts of dredged sludge, 40 parts of waste concrete and 10-20 parts of straw, wherein the straw is formed by mixing one or two of corn straw and wheat straw at any ratio; according to the black and odorous river sediment in-situ repairing agent and the preparation and repairing method thereof, waste resource utilization can be achieved, the cost is low, various pollutants can be adsorbed and removed, the ecological environment of sediment is improved, survival of aquatic organisms is facilitated, the river can be remedied, and therefore the ecological river is achieved.

Description

technical field [0001] The invention relates to the technical field of black and smelly river bottom mud restoration, in particular to an in-situ repair agent for black and smelly river bottom mud and a preparation and repair method. Background technique [0002] Due to the long-term input of pollutants and the accumulation of biological residues in the water body, a large amount of nitrogen, phosphorus, nutrients, heavy metals, and refractory organic matter have accumulated in the sediment of the river channel, causing serious pollution to the sediment of the river channel and the overlying water body. The black and odorous water body of the river not only brings extremely poor sensory experience to nearby residents, but also a prominent water environment problem that directly affects the production and life of the masses. Although the external source pollution control technology and actual restoration of water are very mature, the river sediment still releases endogenous p...

AI Technical Summary

Problems solved by technology

Ex-situ treatment involves a large amount of engineering, and will cause large-scale migration of sediment, and there is a risk of pollutant release

After in-situ restoration, it is easy to have defects such as raising the river bed, reducing the water storage capacity of the river, and affecting the flow rate. However, the chemical covering materials that have prevailed since then have problems such as short repair time and high risk of secondary pollution.

These repair methods are costly, have weak adsorption capacity, and the survival ability of aquatic organisms after restoration is poor, so it is impossible to gradually realize ecological river channels.