Though wastewater Rapid Infiltration (RI) land treatment system has the advantages of requiring simple equipment, easy to operate, low-cost constructing and operating, low energy consuming and having a good effluent quality, it also has the disadvantages of low Hydraulic Loading and demanding large land area coverage. So its application is restricted. Constructed Rapid Infiltration (CRI) system is a brand wastewater treatment system that has been developed from the traditional RI system. The stud...