A kind of MBR plate type membrane cleaning agent and cleaning method
A technology for cleaning chemicals and plate membranes, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as uneven chemical cleaning and unrecoverable chemicals, and achieve saving time for adding chemicals and stabilizing water flow. The effect of low quantity and production cost
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Embodiment 1
[0069] Taking the domestic sewage processed by a certain company as the raw water of the present embodiment, the specific water quality data analysis is shown in Table 1:
[0070] Table 1
[0071] COD / ppm BOD / ppm Sludge concentration / ppm 2560 1480 4300
[0072] MBR plate membrane is used to treat the above-mentioned sewage, and after continuous operation for 2-5 days, the cleaning agent and the online cleaning method of the present application are used for cleaning.
[0073] S1, prepare an alkaline cleaning agent, which comprises the following components: sodium dodecyl benzene sulfonate 1wt%, sodium dodecyl sulfate 0.5wt%, sodium hypochlorite 0.5wt% and the water produced by MBR plate membrane treatment, and use Sodium hydroxide to adjust pH to 10.5;
[0074] S2, stop the water production of the MBR plate membrane module, stop the aeration, and let it stand for 10 minutes;
[0075] S3, open the dosing pipeline valve 11 and the return membrane tank p...
Embodiment 2
[0081] Taking Example 1 as the raw water of this example, the above sewage was treated with MBR plate membrane, and after continuous operation for 2 months, the cleaning agent and the online cleaning method of the present application were used for cleaning.
[0082] S1, an acidic cleaning agent is prepared, comprising the following components: the content of activated carbon is 0.1 wt%, the content of tetrasodium EDTA is 2 wt%; the content of sodium tripolyphosphate is 1 wt%; the content of sodium sulfite is 1 wt% , and the water produced by MBR plate membrane treatment, and adjust the pH value to 2 with citric acid;
[0083] S2, stop the water production of the MBR plate membrane module, stop the aeration, and let it stand for 10 minutes;
[0084] S3, open the dosing pipeline valve 11 and the return membrane tank pipeline valve 17, open the cleaning agent dosing pump 9 and the cleaning agent return pump 15, to replace the water in the MBR plate membrane module, and stop the p...
Embodiment 3
[0090] Taking Example 1 as the raw water of this example, the above sewage was treated with MBR plate membrane, and after continuous operation for 6 months, the cleaning agent and the online cleaning method of the present application were used for cleaning.
[0091] S1, prepare an alkaline cleaning agent, which comprises the following components: sodium dodecylbenzene sulfonate 2wt%, sodium dodecyl sulfate 1wt%, sodium hypochlorite 2wt% and MBR plate membrane treated water obtained, and hydrogenated Sodium adjusts the pH to 11;
[0092] S2, stop the water production of the MBR plate membrane module, stop the aeration, and let it stand for 10 minutes;
[0093] S3, open the dosing pipeline valve 11 and the return membrane tank pipeline valve 17, open the cleaning agent dosing pump 9 and the cleaning agent return pump 15, to replace the water in the MBR plate membrane module, and stop the pump after 20 seconds;
[0094] S4, open the return water pipeline valve 19, and close the ...
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Abstract
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