US 11,795,079 B2
Dynamic membrane reactor with function of nitrogen and phosphorus removal and operation method thereof
Huajun Feng, Zhejiang (CN); Meizhen Wang, Zhejiang (CN); Haibo Tao, Zhejiang (CN); Miao Lv, Zhejiang (CN); Yuqi Chen, Zhejiang (CN); and Yingfeng Xu, Zhejiang (CN)
Assigned to ZHEJIANG GONSHANG UNIVERSITY, Zhejiang (CN)
Filed by ZHEJIANG GONGSHANG UNIVERSITY, Zhejiang (CN)
Filed on Jun. 10, 2021, as Appl. No. 17/343,743.
Claims priority of application No. 202011286700.3 (CN), filed on Nov. 17, 2020.
Prior Publication US 2022/0153617 A1, May 19, 2022
Int. Cl. C02F 3/00 (2023.01); B01D 71/30 (2006.01); C02F 1/463 (2023.01); C02F 3/30 (2023.01); C02F 3/34 (2023.01); C02F 101/10 (2006.01); C02F 101/16 (2006.01)
CPC C02F 3/005 (2013.01) [B01D 71/30 (2013.01); C02F 1/463 (2013.01); C02F 3/305 (2013.01); C02F 3/308 (2013.01); C02F 3/34 (2013.01); C02F 2101/105 (2013.01); C02F 2101/16 (2013.01); C02F 2209/03 (2013.01); C02F 2209/42 (2013.01); C02F 2303/16 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An operation method of a dynamic membrane reactor with function of nitrogen and phosphorus removal, wherein the dynamic membrane reactor comprises a biological treatment system, a dynamic membrane loading system and an automatic system; meanwhile, wherein the biological treatment system comprises an intake pump, an aeration pump, an aeration pipe, a dynamic membrane module comprises a porous filter for phosphorus removal and a conductive precision filter, a suction pump and an outlet pipe; the aeration pump is connected to the aeration pipe, the aeration pipe is located directly below the dynamic membrane module, and an experimental water is obtained through the suction pump; while, the dynamic membrane loading system is connected to an external power supply and comprises a direct-current voltage-stabilized power supply and a load interface; the automatic system comprises a liquid level controller, a time relay and a pressure sensor; the liquid level controller outputs a level signal to adjust an amount of a water intake; the time relay is connected to the direct-current voltage-stabilized power supply to control a running time of electrocoagulation; the data of the pressure sensor is detected by a computer to control the operation time of backwashing system, wherein the operation method comprises the following steps: step 1, before forming a dynamic membrane, the porous filter for phosphorus removal is used as a cathode, the conductive precision filter is used as an anode, and aerobic denitrifiers are inoculated into the dynamic membrane reactor under constant current density of 0-2 A/m2, hydraulic retention time of 6-9 h and flux of 20-200 LMH; step 2, after forming the dynamic membrane, the porous filter for phosphorus removal is used as the anode, the conductive precision filter is used as the cathode, an intermittent aeration is started at the anode under constant current density of 2-2.5 A/m2 when an activated sludge provides a pollutant removal effect, while hydrogen is generated near the cathode and an effective anoxic environment is formed; and step 3, when a transmembrane pressure difference exceeds 0.03 MPa, a hydraulic backwashing is performed under constant current density of 2-2.5 mA/cm2, wherein a backwashing flow is maintained at 100-137.90 kPa for 1-5 min in the hydraulic backwashing, wherein in the step 2, the dynamic membrane is formed to complete one operation cycle of the dynamic membrane reactor when the transmembrane pressure difference reaches 0.02 MPa-0.05 MPa, and a turbidity of an effluent is less than 2NTU.