Saeedeh Rahmati - Masters student,Environmental Engineering Department,Shahid Chamran University,Ahvaz,Iran
Ahmad Fathi - Assistant Professor of Environmental Engineering Department,Shahid Chamran University,Ahvaz,Iran
Afshin Takdastan - Associate Professor of Environmental Technology Research Center,Jundishapur University of Medical Sciences,Ahvaz,Iran

Today due to population growth and declining available water resources,separation of greywater from domestic wastewater and its reuse has been considered in most parts of the world.household wastewater is known to be one of the biggest sources of water storage;so that recycling and reuse it,will significantly reduce the consumption of purified domestic water.domestic wastewater is divided into two parts:first part is black water,which is defined as toilet wastewater and it is highly contaminated with pathogens,organic matter and a large amount of nutrients.the second part is greywater,which includes other source of domestic wastewater.on average included ۷۰-۷۵% of domestic wastewater.in this study,the efficiency of a two-layer filter of silica-garnet in three hydraulic loadings on a pilot scale was investigated.the result show that the average removal in pH,EC,turbidity,TSS,COD,BOD۵,nitrate,phosphate were ۰%,۰%,۴۵.۳%,۳۸.۳%,۳۹.۳%,۴۴%,۹۹%,۶۸.۶%,respectively.

greywater,silica,garnet,washing machine,treatment