A technological and economic evaluation of greywater management systems (India)

Reusing treated greywater can reduce the scarcity and become a significant water source in the Himalayan region. Greywater management and evaluating the pilot project’s efficiency are the primary focuses of the study. A pilot greywater management system has been constructed in one of Leh, Ladakh, India households. Greywater from the household was being managed, and based on the reuse guidelines; the treated water will be used in agriculture was the project’s main scope. The kitchen water is connected to the management unit and was functional during the summer. During winter, the unit was not operational due to extreme weather conditions. Insulation was suggested and provided to make the system functional during winter. The parameter-wise sample analysis was conducted to evaluate technically where some parameters, such as pH, TSS, COD, BOD, etc., were compiled and compared to the existing guidelines. The economic evaluation was carried out based on the construction, insulation, and reuse of treated water. The study concluded based on comparing treated water test results and economic evaluation. Based on the inferences of test results comparison with guidelines, it is concluded that the water is not for reuse, and the unit is not economical for a single household.