What are the functions of air suspension blower in sewage treatment field?

The core function of air suspension blower in sewage treatment is to aerate and supply oxygen for biochemical pool, and at the same time, it takes into account process control and system operation and maintenance optimization. The specific functions are as follows:

1. The biochemical system provides oxygen to ensure microbial activity.

This is the most important role. Biochemical treatment of sewage depends on aerobic microorganisms to decompose pollutants such as COD and ammonia nitrogen in water, and microorganisms need sufficient oxygen for survival and reproduction. The air suspension blower continuously delivers compressed air, bubbles are formed in the pool through the aeration disc and the aeration head, and oxygen dissolves into the water body, providing an oxygen source for aerobic bacteria, ensuring the normal reaction of nitrification and pollutant degradation, stably removing organic matter and ammonia nitrogen, and ensuring that the effluent reaches the standard.

2. Stir and push the flow to prevent sludge settling.

The blown air flow creates disturbance in the water body, which stirs the mixed liquid in the biochemical tank, fully mixes the activated sludge and sewage, keeps the sludge suspended, avoids sludge deposition and accumulation, anaerobic blackening and odor, maintains the uniform mixing of mud and water in the tank, and ensures the continuous and stable biochemical reaction.

3. Adjust the oxygen supply accurately to adapt to the fluctuation of water quality load.

It supports variable frequency stepless adjustment of air volume and pressure, and can be docked with online dissolved oxygen DO instrument. When the influent quality and water quantity change, the aeration air volume will be automatically adjusted: when the influent pollutant concentration is high, the air volume will be increased, and when the load is low, the air volume will be reduced, so as to avoid the waste of energy consumption caused by excessive aeration, prevent nitrification failure caused by lack of oxygen, and realize accurate aeration.

4. Auxiliary process switching to meet multi-working conditions.

The process of sewage treatment plant includes aerobic and anoxic alternating processes, and the blower can supply oxygen as needed according to the process sequence. In A/O, A/O and other processes, with valve switching, aeration is reduced in aerobic section and anoxic section to meet the process requirements of nitrogen and phosphorus removal and improve the removal effect of total nitrogen and phosphorus.

5. Supporting purging and auxiliary gas (secondary)

Some scenes can provide a small amount of compressed air for instrument pipeline purging, sludge reflux device, pneumatic valve gas supply and other auxiliary gas demand, but it is not used as the main purpose.

6. Help the sewage plant to save energy and run intelligently.

Compared with the traditional fan, it reduces energy consumption while completing the task of aeration and oxygen supply, and has its own operation monitoring module, which can be connected to the factory automatic control system, remote monitoring and linkage regulation, support smart water affairs, reduce manual duty and reduce the long-term operation cost of sewage plants.

Simple summary: the core is oxygen supply+stirring+oxygen control on demand to ensure the stable operation of biochemical treatment process.