Environment-friendly treatment method of folic acid wastewater
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A technology for environmental protection and waste water treatment, applied in the chemical industry, can solve the problems of difficult operation, complex process and high production cost, and achieve the effects of easy reaction, simple process, resource and cost saving.
Pending Publication Date: 2020-03-27
NANTONG CHANGHAI FOOD ADDITIVE
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However, the above methods are not only high in production cost, complicated in process, but also difficult in operation, and cannot fundamentally reduce the generation of waste water.
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Embodiment 1
[0027] Take 10L of acid-refined mother liquor, adjust the pH value to 3, and then add PAM flocculant with a concentration of 1 / 1000. After 6 hours, add 5 grams of ferrous sulfate to 1L of liquid, stir to dissolve, add 17 grams of 30% hydrogen peroxide dropwise, stir and react for 2 hours, add PAM flocculant, filter after static precipitation for 1 hour, send samples for testing, after treatment The acid refining mother liquor COD: 500mg / l, ammonia nitrogen: 20mg / l.
Embodiment 2
[0029] Take 10L acid refining mother liquor, adjust the pH value of the acid refining mother liquor to 4, add PAM flocculant with a concentration of 2 / 1000, the amount of PAM flocculant added is 2% of the mother liquor mass, filter after standing for 1 hour, add 1.5 kg of iron carbon, After fully aerating for 6 hours, add 5 grams of ferrous sulfate to 500ml, stir to dissolve, add 10 grams of 30% hydrogen peroxide dropwise, stir and react for 2 hours, adjust the pH value to 9, add PAM flocculant, settle for 1 hour and then filter , send samples for testing, acid refining mother liquor after treatment COD: 320mg / l, ammonia nitrogen: 18mg / l.
Embodiment 3
[0031] Take 10L acid refining mother liquor, adjust the pH value of the acid refining mother liquor to 3, add PAM flocculant with a concentration of 1 / 1000, the amount of PAM flocculant added is 4% of the mother liquor mass, filter after standing for 1 hour, add 1 kg of iron carbon, After fully aerating for 5 hours, add 5 grams of ferrous sulfate and 33 grams of 30% hydrogen peroxide to 1L of liquid and stir for 2 hours to adjust the pH value to 9. Add PAM flocculant, filter after static precipitation for 1 hour, and leave for 48 hours before sending Sample detection, acid refining mother liquor COD after treatment: 440mg / l, ammonia nitrogen: 23mg / l.
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Abstract
The invention belongs to the field of chemical engineering, and particularly relates to an environment-friendly treatment method of folic acid wastewater, wherein the method particularly comprises thefollowing steps: regulating the pH value of an acid refining mother solution, adding a certain amount of a flocculant, standing, filtering, adding iron carbon, and sufficiently aerating; adding an oxidizing agent, carrying out an oxidation reaction under stirring, adding the flocculant again, carrying out static precipitation for 1 hour, and then filtering. The environment-friendly treatment method of the folic acid wastewater provided by the invention is simple and convenient in process, easy to operate in reaction, capable of turning harm into good, capable of saving resources and cost, andgood in industrial prospect, has treated wastewater easily meeting the national emission standard, and is particularly suitable for meeting the requirement of large-scale production for environmentalprotection.
Description
technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to an environment-friendly treatment method for folic acid wastewater. Background technique [0002] Folic acid, a water-soluble vitamin of the B family, is found in spinach and has anti-anemia effects. It is distributed in natural fruits and vegetables and animal tissues and livers, and is used in feed, medicine, and food fields. Deficiency in the human body can lead to neural tube defects, megaloblastic anemia, cleft lip and palate and other diseases. [0003] Folic acid is also called pteroyl glutamic acid, and its parent compound is composed of pteridine, p-aminobenzoic acid and L-glutamic acid. Its structural formula is shown in formula (I): [0004] [0005] Folic acid, extracted from the liver was used as the original preparation method of folic acid. At present, chemical synthesis methods are mostly used, generally using N-p-aminobenzoyl glutamic acid, 2,4,...
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