A method to quickly improve the black and odor of small rivers

Abstract

A method to quickly improve the black and odor of small rivers, adding nitrate and denitrifying bacteria to the water body, the dosage is: 1g COD in the water body is added with 5-6g of nitrate, and each mu of water surface is added with 2-3Kg of solid denitrification bacteria, while adjusting the pH value of the water body to 5-6. 2 The present invention can quickly improve the black and odor phenomenon of the water body, and has the advantages of low investment, quick effect, good effect, and easy operation.

Description

technical field [0001] The invention belongs to the technical field of sewage purification, and in particular relates to a method for quickly improving black and odorous small rivers. Background technique [0002] Black odor is an extreme phenomenon of organic pollution, which is caused by the lack of oxygen in water body and the corruption of organic matter. The main cause of black odor in water body is anaerobic decomposition of organic matter in water body. When a large amount of organic pollutants enter the water body, under the biochemical action of aerobic microorganisms, a large amount of oxygen in the water body is consumed, and anaerobic bacteria reproduce in large numbers, causing organic matter to decay, decompose, and ferment, and decompose into ammonia nitrogen, humus, hydrogen sulfide, and methane and thiols etc. This process causes oxygen consumption to be greater than reoxygenation, resulting in an anoxic environment. The odorous gas produced escapes from th...

AI Technical Summary

Problems solved by technology

This process causes oxygen consumption to be greater than reoxygenation, resulting in an anoxic environment. The odorous gas produced escapes from the water surface and enters the atmosphere. Heavy metals such as iron and manganese in the water are reduced, and the sulfur in the water is reduced to form a large number of negatively charged colloids, including FeS and Suspended particles of sulfide including MnS make the water black and smelly

Therefore, the key to improving black and odorous rivers is to improve the redox state of the water body. Aeration and oxygenation are the most common technical means to improve black and odorous water bodies, but the cycle of aeration and oxygenation is slow and the effect is poor, and it is easy to stir up the sediment , the operating conditions are difficult to control, and in some remote areas, it is difficult to achieve aeration and oxygenation due to the imperfect power supply system