What is considered high strength wastewater?

High strength wastewater is characterized by elevated levels of biochemical oxygen demand (BOD), suspended solids, and grease. These components indicate that the wastewater has a much greater potential for causing environmental harm if not properly treated before discharge.

Biochemical oxygen demand measures how much oxygen is required by microorganisms to decompose organic matter in water. High BOD values suggest a higher concentration of organic pollutants that can deplete oxygen levels in receiving water bodies, leading to adverse ecological effects.

Suspended solids refer to particles that are not dissolved in water and can include organic and inorganic materials. High levels of suspended solids can lead to water quality issues such as turbidity, which can harm aquatic life and hinder photosynthesis in aquatic plants.

Grease contributes to the clogging of drainage systems and can also create scum on the surface of water bodies, impacting ecosystem balance and aesthetics.

In summary, the presence of high levels of BOD, suspended solids, and grease categorizes wastewater as ‘high strength,’ necessitating more intensive treatment processes to mitigate potential environmental damage.