Sediment improving material for black and odorous water body and use method

Abstract

The invention relates to the field of black and odorous water body remediation, in particular to a sediment improving material for a black and odorous water body and a use method, and aims to providea sediment improving material capable of fundamentally eliminating black and odorous phenomena of the water body for the black and odorous water body. The sediment improving material is prepared from1-30 parts by weight of a sediment improving material A and 0.5-10 parts by weight of a sediment improving material B, wherein the sediment improving material A comprises iron powder, carbon powder, aluminium oxide, natural minerals and/or silica; the sediment improving material B comprises calcium nitrate, calcium peroxide and/or chitosan.

Description

technical field [0001] The invention relates to the field of restoration of black and odorous water bodies, in particular to a material for improving bottom mud of black and odorous water bodies and a use method thereof. Background technique [0002] According to the grading standard of urban black and odorous water body in the "Guidelines for Urban Black and Odorous Water Treatment" issued by the Ministry of Housing and Urban-Rural Development of the People's Republic of China, the transparency is less than 25cm, the dissolved oxygen is less than 2mg / L, the oxidation-reduction potential is less than 50mV, and the ammonia nitrogen content Water bodies that meet one or more of the four indicators higher than 8mg / L are black and odorous water bodies. [0003] The phenomenon of black and odorous water body is mainly caused by the lack of oxygen in the water body and sediment environment. The sediment of the water body is rich in microorganisms. A large amount of organic polluta...

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Problems solved by technology

[0005] At present, the commonly used black and odorous water restoration methods are: 1. River dredging technology. The river dredging technology is to reduce the amount of sediment by dredging and transferring the sediment of the black and odorous water body, so as to reduce the accumulation of organic pollutants in the water body. Reducing the load on the water body has a good effect on the restoration of the water body, but the operation is complicated during the construction process, and the sediment treatment after dredging is costly and difficult; 2. Chemical restoration, by adding water flocculants to reduce pollutants in the water After flocculation and sedimentation, the black and smelly water phenomenon will be significantly improved in a short period of time, but the addition of flocculants will increase the sediment content, and the water will return to the black and smelly phenomenon after a period of time, which cannot completely improve the black and smelly water phenomenon; 3. Bioremediation , by adding aerobic microbial strains and oxygen enhancers, the aerobic decomposition process of organic pollutants can be accelerated, and the phenomenon of black and odorous water bodies can be eliminated in a short period of time, but adding exogenous microorganisms will affect the original ecological environment of the water body on the one hand. Cause damage. On the other hand, the survival rate of exogenous microorganisms without domestication and screening is low, and they are prone to death and failure after being added for a period of time.

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