US 12,330,972 B2
Compact rotary algae biofilm reactor
Yuan Lin, Nanjing (CN); Yueying Liu, Nanjing (CN); Ke Xu, Nanjing (CN); Yuexin Yu, Nanjing (CN); Liye Wang, Nanjing (CN); Yanru Wang, Nanjing (CN); and Hongqiang Ren, Nanjing (CN)
Assigned to Nanjing University, Nanjing (CN)
Filed by Nanjing University, Nanjing (CN)
Filed on Aug. 14, 2024, as Appl. No. 18/804,458.
Prior Publication US 2025/0074801 A1, Mar. 6, 2025
Int. Cl. C02F 3/32 (2023.01); C12M 1/00 (2006.01); C12M 3/06 (2006.01); G02B 6/26 (2006.01); G02B 6/32 (2006.01)
CPC C02F 3/322 (2013.01) [C12M 21/02 (2013.01); C12M 23/26 (2013.01); C12M 27/14 (2013.01); G02B 6/262 (2013.01); G02B 6/32 (2013.01); C02F 2203/006 (2013.01)] 16 Claims
OG exemplary drawing
 
8. A compact rotary algae biofilm reactor comprising:
a reaction tank for containing a liquid to be treated;
a fixing frame disposed atop the reaction tank;
a plurality of rotary members, each rotary member comprising a driving shaft which has a lengthwise direction and is rotatably supported on the fixing frame above the reaction tank, a driven shaft rotatably mounted inside the reaction tank at a height at which it can be submerged within the reaction tank, a first motor disposed on an upper portion of the fixing frame and drivingly connected to the driving shaft for rotating the driving shaft, a power transmission belt connecting the driving shaft and the driven shaft for transmitting rotation of the driving shaft to the driven shaft, and an algae biofilm growth carrier wound around the driving shaft and the driven shaft such that the algae biofilm growth carrier travels in a continuous path around the driving shaft and the driven shaft when the first motor rotates the driving shaft;
at least one light guide module, each light guide module comprising a light guide plate disposed between two adjacent ones of the rotary members and having first and second light emitting surfaces each opposing one of the algae biofilm growth carriers of the adjacent rotary members in air above the reaction tank for illuminating portions of the algae biofilm growth carriers outside of the reaction tank, a linear Fresnel lens which is disposed above the fixing frame and has a focal point coinciding with an upper end of the light guide plate when the lens is irradiated with light perpendicular to a plane of the Fresnel lens and focuses light into a linear light band extending in the lengthwise direction of the driving shaft and is supported for movement along an arc centered on the focal point, and a second motor drivingly connected to the Fresnel lens for moving the Fresnel lens along the arc.