Integrated water purification processing method and device of ultrafiltration membrane coagulation/bioreactor

[0022] Example

[0023]The integrated ultrafiltration membrane coagulation/bioreactor water purification treatment device shown in Figure 1 is used to treat a certain slightly polluted source water. The raw water to be treated is first lifted by the lift pump 1 to the high-level water tank 2, and then enters the ultrafiltration membrane coagulation/bioreactor 4 through the constant-level water tank 3, and the hydraulic retention time in the reactor is 30 minutes. At the same time, the coagulant is added to the ultrafiltration membrane coagulation/bioreactor 4 by the coagulant dosing system 15, the coagulant is polyaluminum chloride, and the dosage is 10mg/L; the sludge in the reactor The residence time is 20d. The ultrafiltration membrane module 5 adopts the submerged hollow fiber ultrafiltration membrane provided by Hainan Lisheng Water Purification Technology Co., Ltd., the membrane pore size is 0.01 μm, and the membrane material is polyvinyl chloride. The water flux of the ultrafiltration membrane is 10L/m 2 h, the ultrafiltration membrane outlet water is drawn out by the suction pump 8 through the ultrafiltration outlet valve 7, and the ultrafiltration backwash valve 9 is in a closed state at this time. The suction pressure of the suction pump 8 is measured by the vacuum gauge 6 within the range of 15kPa~30kPa. The ultrafiltration membrane coagulation/bioreactor 4 is aerated into the reactor by an external air pump 11 through a perforated aeration pipe 13 located at the bottom of the reactor. The gas-water ratio is 20:1, and is controlled by a gas flow meter 12 . The sludge residence time in the ultrafiltration membrane coagulation/bioreactor 4 is 20 days, and the excess sludge is discharged out of the reactor through the sludge discharge valve 14 . When the ultrafiltration membrane module 5 is backwashed, the ultrafiltration membrane water outlet valve 7 is closed, the ultrafiltration backwash valve 9 is opened, and the ultrafiltration membrane module 5 is backwashed by the ultrafiltration backwashing pipeline system 10 . The specific treatment effect of the ultrafiltration membrane coagulation/bioreactor integrated drinking water advanced treatment process is shown in Table 1.