US 12,421,147 B2
Method for enhanced denitrification and device thereof
Fangang Meng, Guangdong (CN); Yue Fu, Guangdong (CN); and Ronghua Xu, Guangdong (CN)
Assigned to Sun Yat-sen University, Guangzhou (CN)
Appl. No. 17/911,131
Filed by Sun Yat-sen University, Guangdong (CN)
PCT Filed Apr. 1, 2022, PCT No. PCT/CN2022/084844
§ 371(c)(1), (2) Date Sep. 12, 2022,
PCT Pub. No. WO2023/184491, PCT Pub. Date Oct. 5, 2023.
Prior Publication US 2024/0199460 A1, Jun. 20, 2024
Int. Cl. C02F 3/30 (2023.01); C02F 101/16 (2006.01)
CPC C02F 3/305 (2013.01) [C02F 3/30 (2013.01); C02F 2101/16 (2013.01); C02F 2203/006 (2013.01); Y02W 10/10 (2015.05)] 5 Claims
OG exemplary drawing
 
1. A device for enhanced denitrification, comprising a water inlet tank, an anoxic tank, an aerobic tank and a carbon source booster, which are connected in sequence, an output end of the carbon source booster is connected with the anoxic tank, a water inlet pump is arranged on a connecting pipeline between the water inlet tank and the anoxic tank, and a sludge return pump is provided on a pipeline connecting the aerobic tank and the carbon source booster;
a plurality of membrane contactors are fixed inside the carbon source booster, each of the plurality of membrane contactors is in a hollow structure, a gap is formed between the plurality of membrane contactors and a shell of the carbon source booster, and a membrane in each of the plurality of membrane contactors is a polyvinylidene fluoride membrane;
the device further comprises an external carbon source tank connected with the carbon source booster, and a peristaltic pump and a time relay are provided on a connecting pipeline between the external carbon source tank and the carbon source booster;
a stirrer is installed in the anoxic tank, a membrane module is arranged inside the aerobic tank and connected with a water outlet pump, an online pressure sensor is arranged on a connecting pipeline between the membrane module and the water outlet pump, and a membrane in the membrane module is a flat membrane with membrane area of 0.1 m2 and a membrane pore size of 0.1 μm;
an aeration head is provided in the aerobic tank, the aerobic tank is connected with a high liquid level alarm device, a low liquid level alarm device, and a gas flow meter, and the gas flow meter is connected with an air pump.