A method for recovering lactic acid from marigold flower fermentation wastewater
A technology for fermenting waste water and marigold flowers, applied in chemical instruments and methods, separation/purification of carboxylic acid compounds, multi-stage water/sewage treatment, etc., can solve the problems of severe pollution of marigold flower fermentation waste water, and achieve broad prospects for industrialization , Environmental friendliness, and the effect of reducing emissions
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Embodiment 1
[0028] 4 tons of marigold flower fermentation waste water with 2.8% lactic acid content was pumped into 5m with a centrifugal pump 3 In the reaction kettle, slowly add 40 L of colloid solution prepared with 4 kg of polymer flocculant polyacrylamide 801 under stirring, and stir at 120 rpm for 1 hour.
[0029] After the flocculation treatment, the fermented wastewater enters the horizontal screw centrifugal settler with a separation factor of 6000 by gravity at a high level. After separating the clear and transparent liquid, 210kg of solid sediment is collected at the solid discharge port for the preparation of organic fertilizers.
[0030] Transport the clear and transparent material liquid to the decolorization kettle with a centrifugal pump, preheat to 50°C, add 40kg of activated carbon, stir for 1 hour for decolorization, then enter the plate and frame filter for pressure filtration, and the pressure is controlled at 4.5kgf / cm 2 , The filter cloth adopts 200 mesh specificati...
Embodiment 2
[0036] Pump 8 tons of marigold flower fermentation wastewater with 4.2% lactic acid into the 10m 3 In a reaction kettle, slowly add 100 L of colloid solution prepared with 10 kg of polymer flocculant polyacrylamide 801 under stirring, and stir at 120 rpm for 1 hour.
[0037]The fermented waste water after flocculation treatment passes through a horizontal screw centrifugal settler with a separation factor of 6000 to separate the clear and transparent feed liquid, and collect 430kg of solid sediment at the solid discharge port for the preparation of organic fertilizers.
[0038] Transport the clear and transparent material liquid to the decolorization kettle with a centrifugal pump, preheat it to 60°C, add 80kg of activated carbon, stir and decolorize for 1 hour, then enter the plate and frame filter for pressure filtration, and the pressure is controlled at 5kgf / cm 2 , The filter cloth adopts 200 mesh specifications, and the filtered transparent and colorless material liquid e...
Embodiment 3
[0044] 14 tons of marigold flower fermentation wastewater with a lactic acid content of 5.5% was pumped into the 15m 3 In the reaction kettle, slowly add 150 L of colloid solution prepared with 13 kg of polymer flocculant polyacrylamide 801 under stirring, and stir at 120 rpm for 1 hour.
[0045] The fermented waste water after flocculation treatment passes through a horizontal screw centrifugal settler with a separation factor of 6000 to separate the clear and transparent feed liquid, and collects 690kg of solid sediment at the solid discharge port for the preparation of organic fertilizers.
[0046] Transport the clear and transparent material liquid to the decolorization kettle with a centrifugal pump, preheat it to 50°C, add 120kg of activated carbon, stir and decolorize for 1 hour, then enter the plate and frame filter for pressure filtration, and the pressure is controlled at 4.5kgf / cm 2 , The filter cloth adopts 200 mesh specifications, and the filtered transparent and ...
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