Method of utilizing wastewater of marigold fermentation and dehydration to produce fertilizers

[0019] Example 1 Fertilizer utilization method of marigold fermentation and dehydration waste liquid of the present invention

[0020] The treatment method is introduced as an example of a batch of waste liquid with a lactic acid content of 3.28 g/L and a total amino acid content of 1.06 g/L in the waste liquid of marigold fermentation and dehydration.

[0021] (1) Measure 100ml, 200ml, 500ml, 800ml, 1000ml of marigold fermentation and dehydration waste liquid with a graduated cylinder into a beaker, neutralize with quicklime (CaO) solids to pH 7.0; repeat the neutralization three times, the average amount of quicklime The values ​​are as follows:

[0022] Table 1 Average dosage of CaO as neutralizer

[0023]

[0024] According to the above data, the volume of dehydrated marigold (ml) is taken as the abscissa, the average dosage of CaO (g) is taken as the ordinate, and the linear equation of the neutralization reaction is calculated as Y=5.4507 by drawing a trend line in Excel. g/L*X-0.0444, see figure 1 , The slope of the linear equation is the average constant δ of quicklime consumption is 5.4507, the intercept is the correction constant a is -0.0444, Y is the consumption of quicklime, the unit is gram, X is the volume of marigold fermentation and dehydration waste liquid, the unit is liter;

[0025] (2) Neutralize 10 cubic meters of marigold fermentation and dehydration waste liquid. According to the equation obtained in step (1), the amount of birth lime can be calculated as 54.5 kg. First add 49.5 kg of quicklime to the dehydration waste liquid, stir well and use a pH meter. Monitor the pH change; then slowly add the remaining 5kg of quicklime, and stir well during the process until the pH is 7.0, and then the neutralization solution of the marigold fermentation and dehydration waste liquid quicklime is obtained;

[0026] (3) After the marigold fermentation and dehydration waste liquid quicklime neutralization liquid obtained in step (2) is allowed to stand for 3 days, add manganese sulfate 1.8g/L, sodium molybdate 0.15g/L, sodium tetraborate 2.4g/L, Na 2 EDTA 3.7g/L, FeSO 4 2.8g/L, fully stirred evenly to obtain marigold fermentation and dehydration waste liquid fertilizer fertilizer nutrient solution, the pH is 6.5-7.5, and the water content is 97.0-99.0%;

[0027] (4) The nutrient solution obtained in step (3) is diluted with clean water at a ratio of 1:1 to 10, which can be used to fertilize crops such as corn and marigold.

[0028] Example 2 Application of Fermented Nutrient Solution of Marigold Fermented Dehydration Waste Liquid in Corn Pot Experiment

[0029] Use the test corn variety "Xingnong 998", take corn seeds of the same size and the same degree of plumpness, soak them in sterile water, stir with a glass rod, and soak for two hours to cause the red coat to wash out. Sow in the pots 3-4cm above the soil surface, 4 plants per pot. When the first true leaf grows, watering with clear water is used as the control group (CK), the marigold fermented squeezed dehydrated liquid (dehydrated liquid) is watered as the comparative group, and the marigold fermented dehydrated waste liquid fertilizer nutrient solution obtained in Example 1 The two-fold dilution watering was used as the experimental group, and different groups of corn seedlings were irrigated separately, 200ml per pot, 10 pots per group, watering once every 15 days, and 2 consecutive watering.

[0030] The effects of three groups of different treatment methods on corn plant height, stem thickness, root fresh weight, stem fresh weight, chlorophyll and other indicators were measured, and it was found that the marigold fermentation and dehydration waste liquid fertilizer fertilizer nutrient solution obtained by using the present invention was better than the control chlorophyll The content increased by 6.5%, the plant height increased by 14.9%, as shown in Table 2 and figure 2 Shown.

[0031] Table 2 Effects of different treatments on corn growth indexes

[0032]

[0033] Example 3 Application of marigold fermentation and dehydration waste liquid fertilizer nutrient solution in corn field experiment

[0034] The corn variety to be tested was "Xingnong 998". One month after sowing, a 5m×5m area was randomly selected for experiment in a 10-mu corn field with uniform growth and normal management. After the marigold fermentation and dehydration waste liquid fertilizer fertilizer nutrient solution obtained in Example 1 was diluted by 5 times, the experimental area was irrigated, and the remaining area was irrigated with clean water as the control group (CK). One month later, the effects of the two groups of different treatment methods on the plant height, stem thickness, chlorophyll and other indicators of corn were measured, and it was found that the nutrient solution of the Wanshou fermentation and dehydration waste liquid fertilizer obtained by the present invention increased by 15.12% compared with the control group. , Plant height increased by 7.84%, chlorophyll content increased by 10.45%, as shown in Table 3 and image 3 Shown.

[0035] Table 3 Effects of different treatments on corn growth indexes

[0036]