👉 Rolled fluid, also known as effluent or secondary effluent, is a type of wastewater that has undergone some level of treatment but still contains suspended solids and organic matter. Unlike primary effluent, which is directly discharged from industrial processes or sewage systems with minimal treatment, rolled fluid has been partially treated through physical, chemical, and biological processes. These processes reduce the concentration of suspended solids and organic compounds, making it less harmful to the environment compared to raw wastewater. However, rolled fluid is not yet suitable for direct discharge into natural water bodies due to its residual contaminants. It is often further treated or used in applications where high-quality effluent is not required, such as irrigation or industrial cooling systems.
