| Title |
Study on the Characteristics of Gray Water from an Apartment Complex for Reuse |
| Authors |
박수정 ( Su Jeong Park ) ; 권오상 ( Oh Sang Kwon ) ; 田中宏明 ( Hiroaki Tanaka ) ; 김창수 ( Chang Soo Kim ) ; 김은석 ( Eun Seok Kim ) ; 김지혜 ( Ji Hye Kim ) ; 장석재 ( Seok Jea Jang ) ; 안경희 ( Kyung Hee Ahn ) |
| Keywords |
Apartment complex; Characteristics; Gray water; Reuse |
| Abstract |
This study describes the results of an investigation conducted in order to characterize the quantity and quality of individual gray water streams. The highest pollutants concentrations were found in gray water originating from kitchen and laundry with BOD5 concentrations in the order of several hundreds mg 1(-1). In contrast to this, bathroom was regarded as a major contributor of Escherichia coli. Laundry gray water has higher pH, sodium, sulfate, anionic surfactants. Individual gray water types had different contribution to the overall daily discharge and relative pollutants loads. Kitchen, although accounting for only 13% of the total volume, was identified as a major source of microorganisms with Total coliforms, Escherichia coli, Fecal streptococcus taking up 82%, 74% and 54% of their relative daily load, respectively. The laundry gray water, although being responsible for 36% of the total daily discharge, was established as a significant contributor of sodium, sulfate, anionic surfactants and TOC (70%, 72%, 84% and 52%, respectively). But the laundry gray water was a minor source of microorganisms. Bathroom was found to be a major gray water producer, making up 51% of the flow, but constituted less than 50% of the relative daily load in most cases. |