Comparison of Aeration Devices on Black Odor Water Treatment

Aeration and oxygenation technology is widely used in the treatment of polluted water bodies at home and abroad.

01Main Role

1.1 Increase dissolved oxygen in water
The aeration device mixes the gas with the water, increases the dissolved oxygen content in the water, provides sufficient oxygen for aerobic microorganisms, and creates an active environment for aerobic microorganisms. The activity of aerobic microorganisms makes them able to decompose the organic matter in the water body at a higher speed and with higher efficiency, and reduce the COD and BOD indicators of the water body. The reduction of organic matter and the rise of dissolved oxygen content in the water effectively inhibits the excessive reproduction of algae in the water body, and substantially eliminates the black odor phenomenon of the water body.

1.2 Help the water body in the large substances and debris phase separation

Aeration process through the water body stirring, convection, organic debris, inorganic suspended solids, animal and plant debris and other substances wrapped in bubbles to make them float under the influence of bubbles to prevent pollutants from settling, for the subsequent flocculation and sedimentation, to lay the foundation for the removal of the subsequent flocculation.

1.3 Reduce the pollution brought by the bottom mud in the water body

The important reason for the continuous pollution and poor treatment effect in the black-odor water body is that the sedimentation of organic matter forms the bottom mud, and under the anaerobic environment at the bottom of the water body, the anaerobic bacteria decompose the organic matter to form the nutrients such as nitrogen, phosphorus, etc., and continue to create the conditions for the growth of algae, the formation of toxic and hazardous substances, and the accumulation of organic matter. Therefore, if you want to treat black smelly water body, you must carry out the bottom mud treatment, the organic pollutants of the bottom mud gradually transformed into inorganic substrate, blocking the endogenous pollution.

02 Common types of aeration equipment

2.1 Mechanical aeration
Mechanical aeration equipment with the help of impeller force for aeration, in the liquid position, the impeller hit the bubble to increase dissolved oxygen, such aeration equipment is mostly used in sewage treatment plants. According to the impeller machine installation position, it is divided into vertical axis type, horizontal axis type.

2.2 Blast aeration
Blast aeration with the power of the blower, directly through the diffusion plate or diffusion tube into the water, bubbles in the aerator outlet formation, the size of the bubble size depends on the caliber of the aerator outlet. Blast aeration equipment in the field of sewage treatment in a wide range of applications.

2.3 Jet aeration
Jet aeration using a pump to supply oxygen through the jet, the noise is small. According to the way of air supply is divided into air supply jet machine, negative pressure self-priming jet machine.

2.4 Push-flow aeration machine
Push-flow aerator with the help of aeration, mixing, pushing the power of the flow. Push-flow aeration machine oxygenation belongs to a machine, so there is no need to configure the blower and other equipment, the main equipment for the underwater impeller machine and the rear gas port, with water circulation, can effectively prevent the closed, non-mobile water quality rotting and odor.
2.5 Other aeration equipment
Micro-nano aerator consists of water pump, micro-nano bubble water generator, and some pipe fittings. The core technology of the system is to use the micro-nano bubble generator to generate a large amount of air through a certain way to produce nano-scale bubbles, which can be retained in the water for a long time because of its weak buoyancy influence.

03How to choose

Aeration equipment selected for different water treatment processes should be different, and suitable equipment should be selected for aeration. In the river water treatment, you can draw on the oxygenation capacity of aeration equipment, power efficiency, utilization and service area of four parameters to reasonably select the number and type of aeration equipment under the conditions of the established water body area to meet the requirements of the initial body of water and dissolved oxygen in the substrate.