This Primary Treatment Of Waste Water Fundamental Of Environmental Engineering project report is about the Treatment of Waste water Fundamental. The process of removing contaminants from wastewater and household sewage, both runoff and domestic is called Wastewater treatment. It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants. Its target is to develop an environmentally-safe fluid waste stream and a solid waste, suitable for disposal or reuse (usually as farm fertilizer).

Under Preliminary “Treatment” define about Equalization to Smooth out fluctuations in flow rate. The Flow Measurement contains efficient operation, chemical addition, etc. After pumping, the plant is designed to operate under gravity flow to the point of discharge at the receiving stream. The Primary treatment includes Bar screen, Comminatory, Grit chamber, Primary clarifier. The report defines the details of each Primary treatment separately.

The purpose of disinfection in the treatment of waste water is to substantially reduce the number of microorganisms in the water to be discharged back into the environment for the later use of drinking, bathing, irrigation, etc. The effectiveness of disinfection depends on the quality of the water being treated for example cloudiness, pH, etc. Types of disinfection being used, the disinfectant dosage, and other environmental variables. Cloudy water will be treated less successfully, since solid matter can shield organisms, especially from ultraviolet light or if contact times are low. Generally, short contact times, low doses and high flows all militate against effective disinfection.


As per the common methods of disinfection include ozone, chlorine, ultraviolet light, or sodium hypochlorite. After multiple steps of disinfection, the treated water is ready to be released back into the water cycle by means of the nearest body of water or agriculture. Afterwords, the water can be transferred to reserves for everyday human uses. The pictorial presentation of Primary treatment is helps to understand the concept of the Treatment of Waste water.