Method for treating black and odorous water

Abstract

The invention discloses a method for treating black and odorous water. The method for treating the black and odorous water comprises the following steps that 1, a micro-electrolytic material is addedto sludge of the black and odorous water and mixed with the sludge of the black and odorous water, wherein the dosage of the micro-electrolytic material is 0.5% of the weight of the sludge of the black and odorous water; 2, a saturated sodium carbonate solution is put into the sludge of the black and odorous water, wherein the dosage of the saturated sodium carbonate solution is 300-450 ml / m<2> according to the bottom area of a sludge layer; 3, microalgae are put into the black and odorous water for cultivation, and oxygen generated by the photosynthesis of the microalgae is dissolved in the black and odorous water; 4, water in the black and odorous water and external air are sucked by a jet pump to form an air-water mixture, the air-water mixture is released into the original black and odorous water to aerate the black and odorous water. The sludge in the black and odorous water and the black and odorous water itself are improved without transferring water or sludge of the black and odorous water, the improvement effect is good, and the efficiency is high.

Description

technical field

[0001] The invention relates to a method, in particular to a method for treating black and odorous water. Background technique

[0002] Due to the large accumulation of organic pollutants and ammonia nitrogen in the water, anaerobic decomposition produces H2S and other sulfide odors, and the release of ammonia nitrogen makes the water body eutrophic, resulting in a large number of black and smelly inland rivers (surges) and landscape lakes in our cities , it is urgent to deal with it. For the treatment of such black and odorous water bodies, at present, sewage interception or transfer is mainly carried out first, and then methods such as dredging, planting aquatic plants, changing water, adding microbial agents, and adding calcium nitrate to sludge are used.

[0003] In the prior art, black and odorous water bodies need to intercept or transfer sewage, but many cities in China, especially rivers and lakes in old urban areas, are difficult to intercept or tra...