Brewery wastewater treatment sedimentation tank

The role of brewery wastewater treatment sedimentation tank

• Suspended solids removal: Solid particles such as sediment and yeast cells in wastewater are precipitated to the bottom of the tank by gravity, forming sludge. ‌

• Homogenization of water quality: Adjusting parameters such as pH and temperature of wastewater to create stable conditions for subsequent treatment. ‌

Type of sedimentation tank

• Primary sedimentation tank: located in the pretreatment stage, mainly removes large suspended particles. ‌

• Secondary sedimentation tank: used after biological treatment to further separate activated sludge and treated water. ‌

Characteristics of sedimentation tank operation

• Sludge treatment: The settled sludge needs to be cleaned regularly, and some can be reused as raw materials or carbon sources for anaerobic digestion. ‌

• Efficiency improvement: Combining air flotation or coagulation sedimentation can improve the removal rate of suspended solids. ‌

Typical Case

A certain brewery achieved a COD removal rate of over 90% through the "UASB anaerobic+aerobic biological treatment+sedimentation tank" process, and partially reused the settled sludge for production, reducing treatment costs. ‌

Brewery wastewater treatment sedimentation tankThe advantages of mainly lie in efficient processing, resource utilization, and cost savings, including:

Efficient sedimentation and processing capability

The inclined plate/inclined tube sedimentation tank can significantly improve treatment efficiency by increasing sedimentation area, shortening sedimentation distance, and achieving sedimentation speed of 20-40m/h. ‌

The unit area produces a large amount of water and occupies a small area, making it suitable for renovation and expansion projects with limited space. ‌

Resource recycling and pollution reduction and carbon reduction

The high concentration of organic matter in beer wastewater can serve as a "carbon source" for wastewater treatment plants, replacing some chemical agents and reducing carbon emissions. For example, Qingdao Beer has achieved an annual carbon reduction of 12000 tons through the technology of "synergistic treatment of high concentration beer wastewater and municipal sewage". ‌

After treatment, the effluent can meet the Class IV standards for surface water and be used for river replenishment to alleviate the problem of black and odorous water bodies.