Method and device for quickly improving black-odorous large and medium rivers

Abstract

The invention relates to a method and a device for quickly improving the black-odorous large and medium rivers. Nitrate and denitrifying bacteria are added into the water body, wherein the addition amount is as follows: 5-6g of nitrate is added into 1g of COD in the water body, and 2-3Kg of solid-state denitrifying bacteria is added to each mu of water surface; the pH value of the water body is adjusted to 5-6 at the same time. The method and device provided by the invention can quickly improve the black-odorous phenomenon of the water body and have the advantages of investment saving, quick effect, good effect, easiness in operation and the like.

Description

technical field [0001] The invention belongs to the technical field of sewage purification, and in particular relates to a method and a device for quickly improving the black and odor of large and medium-sized 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 od...

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