Method for preparing liquid calcium acetate fertilizer from egg shells

Abstract

The invention discloses a method for preparing a liquid calcium acetate fertilizer from egg shells. The method comprises the following steps of S1, first crushing the collected egg shells; S2, addingan industrial acetic acid which is 20% of the volume of a liquid storage tank to the liquid storage tank; S3, increasing the temperature of the liquid storage tank, and meanwhile performing stirring;S4, while stirring, pouring the crushed egg shells into the liquid storage tank until the egg shells are insoluble in acetic acid, then increasing the temperature again, and meanwhile continuously stirring; and S5, after the reaction is completed, sampling the completely reacted solution. According to the method for preparing the liquid calcium acetate fertilizer by use of the egg shells disclosedby the invention, the liquid calcium acetate is prepared by use of reaction of the egg shells and acetic acid to achieve the purpose of recycling the eggshells; the egg shells are prevented from polluting the environment; meanwhile because the alkalinity of calcium acetate is relatively low, the calcium acetate does not destroy the soil during fertilization, thereby guaranteeing the long-term useof the soil; and the absorption of crops on calcium ions is facilitated, thereby guaranteeing the normal growth of the crops.

Description

technical field [0001] The invention relates to the technical field of calcium acetate processing, in particular to a method for preparing liquid calcium acetate fertilizer from eggshells. Background technique [0002] my country is a big country in the production and consumption of poultry eggs, and the total output of poultry eggs reaches 24 million tons per year, accounting for 46% of the world's total output. my country's poultry egg consumption is dominated by fresh eggs, accounting for more than 90% of egg production. According to statistics, a medium-sized city discards 50-80 tons of egg shells every month, and the country discards about 400,000 tons of egg shells every year. A large number of discarded egg shells have brought serious environmental pollution. Egg shells account for 10% of the weight of the whole egg. -12%, composed of three parts: suprashell membrane, subshell membrane and shell. The upper shell membrane, also known as the colloidal film or the oute...

AI Technical Summary

Problems solved by technology

Applying lime to calcium-deficient soil can not only supplement the plants and soil with calcium, but also increase the pH value of the soil, thereby reducing or eliminating the harm to soil properties and plant physiology caused by a large amount of iron, aluminum, and manganese in acidic soil. When there is more calcium fertilizer, it will make the soil alkaline and reduce the normal growth of crops. Since calcium carbonate is insoluble in water, when the equivalent is small, it is not enough for crops to absorb calcium.