As one of the main components of washing powder, Linear Alkylbenzene Sulphonates (LAS) will lead to a large amount of pollution and do great harm to the balance of the ecosystem by forming emulsified colloid substances if used and discharged directly into surface waters with domestic laundry Wastewater. In this paper, an effective method is proposed to reduce the negative effect of LAS on the water environment by using a constructed rapid infiltration system (CRIS) to treat laundry Wastewater before it is d...