Preparation method for immobilization particle used for reducing activated sludge
A technology of activated sludge and granules, applied in biochemical equipment and methods, microorganism-based methods, fixed on or in inorganic carriers, etc. High price and other problems, to achieve the effect of increasing the concentration of sludge degrading bacteria, easy solid-liquid separation, and improving mechanical strength
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[0021] The preparation method of the immobilized particles of reduced activated sludge of the present invention comprises the following steps:
[0022] 1) placing the screened sludge-degrading bacterial strains, including Bacillus subtilis, Bacillus cereus, Bacillus megaterium, Bacillus licheniformis, and Bacillus pumilus, in a squeeze bed for culture to make a fermentation broth;
[0023] The fermentation broth corresponding to each of the above strains is mixed according to the following weight ratio: Bacillus subtilis: Bacillus cereus: Bacillus megaterium: Bacillus licheniformis: Bacillus pumilus is 4-6: 4-6: 6-9: 5- 7:4;
[0024] 2) Spray-dry the above-mentioned mixed bacteria solution to make bacteria powder. The spray-drying process conditions are controlled as follows: the inlet temperature of the dryer is 175°C-190°C, the outlet temperature is 80-90°C, the atomizer speed is 200-220rpm, and the feed Speed control is 30-50ml / min;
[0025] 3) Use the PVA-saturated bor...
Embodiment 1
[0033] 1) The fermentation broth corresponding to each bacterial strain is mixed according to the following weight ratio: Bacillus subtilis: Bacillus cereus: Bacillus megaterium: Bacillus licheniformis: Bacillus pumilus is 4: 4: 6: 5: 4;
[0034] 2) Spray-dry the above-mentioned mixed bacteria solution to make bacteria powder. The spray-drying process conditions are controlled as follows: the inlet temperature of the dryer is 175°C-190°C, the outlet temperature is 80-90°C, the atomizer speed is 200-220rpm, and the feed Speed control is 30-50ml / min;
[0035] 3) Prepare the immobilized granules by using the PVA-saturated boric acid method to prepare the above-mentioned bacterial powder. The preparation method is: weigh 80g of polyvinyl alcohol and dissolve it in 1000ml of water. Add the above-mentioned bacteria powder at the concentration of / L, add 0.02% sodium alginate and 4% silicon dioxide at the same time, stir and mix well;
[0036] Prepare a saturated boric acid soluti...
Embodiment 2
[0038] 1) The fermentation broth corresponding to each bacterial strain is mixed according to the following weight ratio: Bacillus subtilis: Bacillus cereus: Bacillus megaterium: Bacillus licheniformis: Bacillus pumilus is 6: 6: 9: 7: 4;
[0039] 2) Spray-dry the above-mentioned mixed bacteria solution to make bacteria powder. The spray-drying process conditions are controlled as follows: the inlet temperature of the dryer is 175°C-190°C, the outlet temperature is 80-90°C, the atomizer speed is 200-220rpm, and the feed Speed control is 30-50ml / min;
[0040] 3) Use the PVA-saturated boric acid method to prepare the immobilized granules from the bacteria powder prepared above. The preparation method is: weigh 80g of polyvinyl alcohol and dissolve it in 1000ml of water. Add the above-mentioned bacteria powder at the concentration of / L, add 0.02% sodium alginate and 4% silicon dioxide at the same time, stir and mix well;
[0041] Configure a saturated boric acid solution, adju...
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