Abstract: Provided is a nano-photocatalyst-microorganism composite multilayered light-transmitting combination support, comprising a plurality of wave-shaped plexiglass plates (1), a tandem rod holder (4), hollow elastic spacers (5), and fixing screws (6); each of the wave-shaped plexiglass plates (1) is provided with four fixing holes (7); the tandem rod holder (4) is provided with four tandem rods (8), and the four tandem rods (8) pass through the fixing holes (7); the tandem rods (8) between the two adjacent wave-shaped plexiglass plates (1) pass through the hollow elastic spacers (5); each of the tandem rods (8) is provided with a fixing screw (6) at the top end; each of the wave-shaped plexiglass plates (1) have different loading layers on the upper and lower surfaces, with a nano-photocatalyst-loading layer (2) on one surface and a degrading bacteria-loading layer (3) on the other surface.

Abstract: Provided is a device with microorganism-coupled activated carbon for removing agricultural chemicals in farmland drainage water, comprising a water-permeable mounting chute means (1), a coarse grid intercepting mesh (8), an insertable filter wall (3) and fixing piles (4); wherein the water-permeable mounting chute means (1) is provided with a slot (2) and a narrow groove (9), is closed at the bottom and the two sides parallel to the length direction of a farmland drainage ditch by a bottom baffle (10) and side baffles (5), respectively, and the water-permeable mounting chute means (1) is fixed to the farmland drainage ditch by the fixing piles (4); the insertable filter wall (3) is inserted into the slot (2); and the coarse grid intercepting mesh (8) is inserted into the narrow groove (9).

Abstract: Provided is a nano-photocatalyst-microorganism composite multilayered light-transmitting combination support, comprising a plurality of wave-shaped plexiglass plates (1), a tandem rod holder (4), hollow elastic spacers (5), and fixing screws (6); each of the wave-shaped plexiglass plates (1) is provided with four fixing holes (7); the tandem rod holder (4) is provided with four tandem rods (8), and the four tandem rods (8) pass through the fixing holes (7); the tandem rods (8) between the two adjacent wave-shaped plexiglass plates (1) pass through the hollow elastic spacers (5); each of the tandem rods (8) is provided with a fixing screw (6) at the top end; each of the wave-shaped plexiglass plates (1) have different loading layers on the upper and lower surfaces, with a nano-photocatalyst-loading layer (2) on one surface and a degrading bacteria-loading layer (3) on the other surface.

Abstract: A device for purifying first-stage drainage effluents from dry croplands, the device including: a) a plastic corrugated pipe including an upright segment and a horizontal segment, the upright segment comprising plastic mesh openings; b) a steel wire mesh box filled with stuffing pellets including biological carriers; and an inspection cover. The plastic mesh openings are disposed at one end of the upright segment, the other end of the upright segment is connected to one end of the horizontal segment, and the other end of the horizontal segment is connected to the steel wire mesh box. The upper surface of the upright segment of the plastic corrugated pipe is lower than the upper surface of the field ditch, and the lower edge of the plastic mesh openings is higher than the bottom surface of the field ditch.

Abstract: A device for purifying first-stage drainage effluents from dry croplands, the device including: a) a plastic corrugated pipe including an upright segment and a horizontal segment, the upright segment comprising plastic mesh openings; b) a steel wire mesh box filled with stuffing pellets including biological carriers; and an inspection cover. The plastic mesh openings are disposed at one end of the upright segment, the other end of the upright segment is connected to one end of the horizontal segment, and the other end of the horizontal segment is connected to the steel wire mesh box. The upper surface of the upright segment of the plastic corrugated pipe is lower than the upper surface of the field ditch, and the lower edge of the plastic mesh openings is higher than the bottom surface of the field ditch.