Preparation method of compound microelement nutrient capable of enhancing activity of activated sludge
A technology of compounding trace elements and activated sludge, applied in the field of water treatment, can solve the problems of limited microbial activity, poor removal of organic pollutants, nitrogen and phosphorus removal, etc.
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Embodiment example 1
[0016] Powder 500kg of animal keratin and 500kg of soybean meal, sieve to remove particulate impurities to obtain about 900kg of powder, dissolve with 600kg of water according to the solid-to-liquid mass ratio of 1.5, and stir in the reactor at high speed for 2 hours at a stirring rate of 500rpm to fully disperse and emulsify Finally, add it into 1200kg of hydrochloric acid with a concentration of 31.5%, and keep stirring at a stirring intensity of 300rpm. Under normal atmospheric pressure, the mixed solution is heated to 110° C. and kept at constant boiling for 8 hours for hydrolysis to obtain a hydrolyzed solution. When the hydrolyzed solution was cooled to 55°C, potassium hydroxide was added to neutralize it to a pH value of 5.0, and the neutralized mixed solution was filtered to remove precipitated impurities to obtain an amino acid stock solution. The amino acid stock solution is heated and concentrated under reduced pressure, and part of the salt is analyzed, and the conc...
Embodiment example 2
[0021] Stir and dissolve 500kg of commercially available amino acid powder (the main component is branched-chain amino acid) and add a well-proportioned trace element salt in an amount of 500kg, and chelate at 80°C for 6 hours to prepare a compound trace element nutrient solution. The amino acid chelated trace element liquid is evaporated and concentrated to prepare the amino acid chelated compound trace element nutrient emulsion. The mass concentration of Zn, Cu, Ni, B, Co, Mn, Mo and Se in the complex trace element nutritional emulsion accounted for 3.75%.
[0022] A sewage treatment plant is used to treat wastewater from acrylonitrile production workshops. The incoming water is relatively simple and lacks trace elements. Sprinkle the prepared powder directly to the water inlet of the biochemical reactor, and the dosage is 1 / 1000 of the amount of activated sludge in the reactor. There is about 10t of activated sludge in the activated sludge biochemical reactor. The dosage i...
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