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Method for reducing membrane blocking and removing phosphorus in MBR (Membrane Bioreactor) by utilizing sludge of water treatment plant
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A technology for waterworks and reactors, applied in the field of membrane clogging and phosphorus removal, can solve the problems of ineffective biological phosphorus removal and membrane clogging, and achieve the effects of low cost, reduced membrane clogging and simple operation
Active Publication Date: 2016-12-14
ZHEJIANG UNIV OF TECH
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[0004] In order to overcome the problems of membrane clogging and ineffective biological phosphorus removal in existing MBR reactors, the present invention provides a simple, economical and effective method for reducing membrane clogging and phosphorus removal in MBR reactors by using sludge from waterworks
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example 1
[0021] A method for reducing membrane clogging and phosphorus removal in an MBR reactor by using sludge from a waterworks plant, comprising the steps of:
[0022] (1) Take sludge from waterworks;
[0023] (2) Take an integrated MBR reactor that operates normally but has a certain degree of membrane clogging, the effective volume of the reactor is 21L, and the membrane flux is 35L / m 2 / h, TP is 10mg / L continuous aeration, and the influent is configured sewage;
[0024] (3) Add the sludge from the waterworks described in step (1) into the reactor once per day in an amount of 100 mg / L. After 30 days of stable operation, aerobic granular sludge is obtained in the reactor, and membrane clogging is reduced. , Membrane flux becomes 40L / m 2 / h, TP in the reactor is 1mg / L.
example 2
[0026] A method for reducing membrane clogging and phosphorus removal in an MBR reactor by using sludge from a waterworks plant, comprising the steps of:
[0027] (1) Take sludge from waterworks;
[0028] (2) Take an integrated MBR reactor that operates normally but has a certain degree of membrane clogging, the effective volume of the reactor is 21L, and the membrane flux is 30L / m 2 / h, TP is 10mg / L continuous aeration, and the influent is configured sewage;
[0029] (3) The sludge from the waterworks described in step (1) is added to the reactor at one time at an addition rate of 500 mg / L per day. After 14 days of stable operation, aerobic granular sludge is obtained in the reactor, and the membrane clogging is reduced. , membrane flux becomes 45L / m 2 / h, TP in the reactor is 0.8mg / L.
example 3
[0031] A method for reducing membrane clogging and phosphorus removal in an MBR reactor by using sludge from a waterworks plant, comprising the steps of:
[0032] (1) Take sludge from waterworks;
[0033] (2) Take an integrated MBR reactor that operates normally but has a certain degree of membrane clogging, the effective volume of the reactor is 21L, and the membrane flux is 35L / m 2 / h, TP is 10mg / L continuous aeration, and the influent is configured sewage;
[0034] (3) Add the sludge from the waterworks described in step (1) to the reactor once per day in an amount of 1000 mg / L. After 10 days of stable operation, aerobic granular sludge is obtained in the reactor, and membrane clogging is reduced. , Membrane flux becomes 48L / m 2 / h, TP in the reactor is 0.3mg / L.
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Abstract
The invention provides a method for reducing membrane blocking and removing phosphorus in an MBR (Membrane Bioreactor) by utilizing sludge of a water treatmentplant. The method comprises the following steps: taking the sludge of the water treatmentplant; taking the integrated MBR which works normally and generates a membrane blocking condition; adding the sludge of the water treatmentplant into the reactor according to an adding amount of 100mg / L to 1000mg / L; after stably running for 10 to 30 days, obtaining aerobic granule sludge in the reactor, reducing the membrane blocking, increasing a membrane flux and realizing a phosphorus removing effect in the reactor. By utilizing solid wastes of the water treatment plant, utilizing residual flocculation and non-polar granules and adding into an aeration tank or the reactor, the granulation of the aerobic granule sludge in the reactor is accelerated and sludge floc is reduced; hydraulic shearing is increased and membrane surfacepollution is reduced; the membrane flux is increased and the phosphorus removing effect is also realized.
Description
technical field [0001] The invention relates to a method for reducing membrane clogging and phosphorus removal in an MBR reactor by using sludge from a waterworks. technical background [0002] With the continuous development of sewage treatment technology in our country, MBR process, a new water treatment technology combining activated sludge method and membrane separation technology, is receiving more and more attention and research. The MBR process is mainly composed of membrane separation components and bioreactors, which are mainly divided into aerated membrane-bioreactors, extraction membrane-bioreactors and solid-liquid separation membrane-bioreactors. The combined form of the device is divided into three basic types: split type, integrated type and composite type. The MBR process has the characteristics of stable effluent quality, less residual sludge, separate separation of sludge and water, barrier to microorganisms, small footprint, simple maintenance, etc., and ...
Claims
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