EVALUATION OF SYNTHETIC GREYWATER QUALITY DURING STORAGE

Abstract

The reuse of greywater (GW) is a promising option for more sustainable management of water resources. In a reuse system, usually the production and consumption of water occur at different times, which may imply the need for a storage tank prior to treatment step. This study aims to evaluate changes in quality of synthetic greywater (SGW), stored at home. Were also studied GW bathroom and washing machine. Another goal is the calibration of a formulation for SGW, found in a British publication, in order to achieve greater representation of Brazilian reality. The CA storage showed rapid depletion of the DO levels below 1 mg/L, accompanied by increase in reducing character of the medium. In some samples, growth was observed between densities of fecal coliform since day 1 of storage. The synthetic calibrated formulation provided a good fit to the tracks target pre-set to their physicochemical and microbiological contaminants.

Keywords: Greywater, Reuse, Environmental Sanitation, Ecological Sanitation, Water Sustainability.