A 50 KLD Sewage Treatment Plant (STP) is a facility designed to treat 50,000 liters of sewage per day. STP is typically used for smaller communities, residential complexes, or industrial facilities that generate sewage in the specified capacity range.

The sewage treatment process in a 50 KLD Sewage Treatment Plant

Preliminary Treatment

Incoming sewage undergoes screening to remove large objects and grit removal to protect downstream equipment from damage.

Primary Treatment

The screened sewage is allowing to settle in large sedimentation tanks, where heavier solids settle at the bottom as sludge and lighter materials like oils and greases float to the top. The sludge is then removing for further treatment.

Secondary Treatment

The primary treated sewage is subjecting to biological processes, such as the activated sludge process or other methods like trickling filters or rotating biological contactors. These processes use microorganisms to consume organic matter and pollutants.

Tertiary Treatment

Depending on the discharge requirements, the secondary treated sewage may undergo additional polishing in the tertiary treatment stage. This phase may include sand filtration, chemical precipitation, or advanced oxidation processes.

Disinfection

After the tertiary treatment, the effluent is disinfecting using chlorine, ultraviolet (UV) light, or ozone to kill any remaining pathogens

Sludge Treatment

The sludge generated during the primary and secondary treatment processes undergoes further treatment, which may include anaerobic digestion, dewatering, and other methods to reduce volume and stabilize the sludge.

Effluent Discharge or Reuse

The treated wastewater (effluent) is discharging into the environment or reused for non-potable purposes like irrigation or industrial processes, depending on the quality of the effluent and local regulations.

Conclusion

The specific design and technologies used in a 50 KLD STP can vary based on factors such as the characteristics of the sewage, environmental regulations, available space, and budget constraints. The goal of any STP is to ensure effective treatment to meet environmental standards and protect public health while minimizing the impact of sewage on natural water bodies.