When discharging surplus water from a landfill, it is necessary to treat the surplus water by using a large amount of chemicals such as flocculants according to its turbidity. In order to do so, a large-scale wastewater treatment facility must be constructed at present, which is costly and economically inefficient. To solve this problem, we developed a water treatment technology using a new filter material. As the filter media, we used recently developed hollow cylindrical filter media and fiber napped filter cloth. We devised a depth filtration system using a hollow cylindrical filter medium and a rotating drum type filtration system using a fiber napped filter cloth. It was found to be an economical and highly practical method. Both the depth filtration system and the filter cloth filtration system can be moved. The required area is about 1/5 to 1/9 of the conventional method, the construction cost is about 1/2 of the conventional method, and the operating cost is about 1/2 to 3/3. /4, which is economical. In terms of application area, raw water with a SS concentration of 1000 mg/l can be treated at a filtration rate of 5 to 10 m/h with a small amount of coagulant (polymer 0.4 to 0.5 mg/l) to reduce the SS concentration to 30 mg/l or less in treated water. method.