Slow infiltration system unpowered rotating biological sewage purification apparatus and method

One slow infiltration system unpowered rotating biological sewage purification device, mainly by the roller grill machine, without power bioprocessing device and slow soil infiltration system. The present invention also discloses a method for purifying water using the device. The present invention can be cost-effectively purify water, make full use of nutrients and water, sewage, and strengthen the production of crops, pasture and forests, and promote the development of livestock and aquatic products, while high hydraulic load on the wastewater treatment area as small as possible, for a high hydraulic loading of sewage conventional single slow soil infiltration system 15 times.