TECHNOLOGY FOCUS - ENVIRONMENT - Preferred Method: The volume of water in the biochemical bed while processing, is not greater than 50%. The volume of water in the processed biochemical bed, is 1-5%.    TECHNOLOGY FOCUS - INSTRUMENTATION AND TESTING - Preferred Components: At least one spherical shell inner hole is set in the frame body. The outline size of the spherical shell hole is not less than the opening size of the through hole. An internal bearing is provided with a microorganism carrier. The small opening of the hole is provided with a strip hole which is set on a spherical shell cavity. The diameter of the small hole is not less than the maximum outline size of the microorganism. The peripheral envelope of the microorganism carrier is provided with a microporous-sealing body. There are micropores set on the microporous-sealing body. The pore size of the micropores is not less than the maximum outline size of microorganism. There are many water inlet area set in the biochemical bed. Many biochemical beds are uniformly arranged: on the water inlet area, or at the middle area along the water flow direction of the biochemical bed or of at least one side edge interval spacing. There a number of perforated spherical shells which are scattered on the frame body, or scattered at the middle area along the water flow direction or scattered on the at least one side edge. A solid stopper is located the between adjacent perforated spherical shells. The perforated spherical shell located at the center of the frame body exhibits rotation or eccentric rotation. The frame body is suspended with water in suspending state, or the bottom part of the frame body is provided with a heavy object so that frame body is placed in a water area having suspended state. The frame body is set with a grid-shaped frame body. The surface of the grid-shaped frame body is set with through-hole. At least one side of the grid-shaped frame body is disposed with an orifice. The diameter of a hole plate is smaller than the overall dimensions of the grid.