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

A bioreactor and treatment device technology, applied in the field of water treatment, can solve problems such as limited removal capacity of dissolved organic matter in water, stability of aquatic organisms, and inability to remove them, so as to reduce maintenance and operation costs, delay membrane fouling, and facilitate maintenance management effect

Inactive Publication Date: 2008-07-16
HARBIN INST OF TECH
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Problems solved by technology

However, the ability of ultrafiltration alone to remove dissolved organic matter in water is very limited, especially small molecular weight and easily biodegradable organic matter, which can hardly be removed by ultrafiltration
However, this par...
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Abstract

The invention discloses an integrated water treatment method of ultrafiltration membrane coagulation/ biological reactor and a device thereof. The invention, the coagulation, and the biological reaction is combined and completed in a same reaction cell. Raw water enters the ultrafiltration membrane coagulation/ biological reactor; activated sludge microorganism in the reactor biologically degrades ammonia nitrogen and organic matters with low molecular weight in the water; a coagulant adding system adds coagulant and adsorbent in the reactor to remove the organic matters with high molecular weight and phosphorus; at last, the immersion ultrafiltration membrane components arranged in the reactor carries out the solid-liquid separation to prepare drinking water with excellent quality. A perforated aeration pipe is arranged on the lower part of the reactor to be connected with a sludge discharge pip to discharge the residual sludge in the reactor regularly. In order to ensure the membrane flux, a membrane reverse washing system carries out the reverse washing for the ultrafiltration membrane components regularly. The invention combines the coagulation effect and the biological effect with the ultrafiltration physical interception effect so that the manufacturing cost and the operation cost are remarkably reduced, while the invention is a novel advanced purification process of the drinking water with the advantages of high efficiency, energy saving, convenient maintenance and management.

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

Examples

  • Experimental program(1)

Example Embodiment

[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.
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