Coarse bubble diffusers generate large bubbles with a diameter greater than 2mm, uniformly releasing air into the water as bubbles through an aeration device. They feature a simple structure, are typically made of corrosion-resistant materials such as rubber and stainless steel, are suitable for medium to deep water environments, and are easy to install and disassemble. They can be used in intermittent or continuous aeration modes, are not prone to clogging, and are suitable for various wastewater treatment and aquaculture ponds. The advantages of coarse bubble diffusers wastewater include high air volume, lower energy consumption, and the ability of rising bubbles to vigorously churn the water, enhancing mixing and quickly breaking up water stratification. They are also cost-effective, easy to maintain, require minimal cleaning, and have strong pollution resistance, adapting to complex conditions such as high-concentration wastewater and water containing impurities.