Method for preparing compound flocculating agent
A flocculant and composite technology, applied in the direction of flocculation/sedimentation water/sewage treatment, etc., can solve the difficulty of large-scale industrial production and use of microbial flocculants, reduce the total amount of flocculants, the residual amount of metal ions, flocculant molecules Problems such as different structures, to achieve the effect of weakening secondary pollution, good promotion value, and good flocculation effect
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[0019] Example 1
[0020] (1) Preparation of biological flocculant solution: mix EM, honey, and sterile water at a volume ratio of 5:5:90, and ferment for 3 days at 25°C with a rotary shaker speed of 120r / min to obtain EM Fermentation broth: Centrifuge the fermentation broth at 8000r / min for 20 minutes, evaporate and concentrate the separated liquid to 1 / 4 of its original volume at 40℃~50℃, cool to 4℃, add 2 times volume of absolute cold ethanol , Placed at 4 ℃ for 24h, pour out the liquid, and retain the flocculation sedimentation substrate; then add an equal volume of ethanol with a mass concentration of 80% to the separated liquid part, let stand for 24h, pour out the liquid part, and retain the flocculation For the precipitate, repeat this step twice to collect the flocculated precipitate; then dilute the precipitate with ethanol and dry it in a vacuum at 10-12pa for 6-8h to obtain a bioflocculant solid; dissolve the bioflocculant in deionized water The water is configured i...
Example Embodiment
[0027] Example 2
[0028] The difference between this implementation and Example 1 is that EM, honey, and sterile water are mixed in a volume ratio of 5:5:90 and then sealed for fermentation for 3 days. The other steps and parameters are the same as those in Example 1. Compound flocculants are also available.
Example Embodiment
[0029] Example 3
[0030] (1) Preparation of biological flocculant solution: mix EM, honey, and sterile water at a volume ratio of 5:5:90, and ferment for 3 days at 25°C and a rotary shaker speed of 120r / min; use 5000r Centrifuge the fermentation broth for 20 minutes at a speed of 40℃~50℃, and then evaporate and concentrate the separated liquid to 1 / 4 of its original volume, then cool it to 4℃, add 2 times the volume of anhydrous cold ethanol at 4℃. Leave it for 24 hours, pour out the liquid, and retain the flocculation sedimentation substrate; then add an equal volume of ethanol with a mass concentration of 80% to the separated liquid part, let it stand for 24 hours, pour out the liquid part, retain the flocculation sediment, and repeat the procedure Step 2, collect the flocculated sediment; then dilute the sediment with ethanol, and dry it in vacuum at 10-12pa for 6-8h to obtain the bioflocculant solid; dissolve the bioflocculant in deionized water to configure bioflocculation ...
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