Process for Activating Lignite Humic Acid with Biological Enzyme

Abstract

The invention belongs to the technical field of bioenzyme application, and particularly relates to a novel technique for activating lignite humic acid by using a bioenzyme. The technique comprises the following steps: adding lignite into a buffer solution; adding a composite microbe solution and a composite enzyme preparation to obtain a mixed solution; heating the mixed solution, and stirring; adding an ion exchanger, regulating the pH value, heating and carrying out ion exchange; and carrying out centrifugal separation. By using the composite microbes to decompose and activate the humic acid, the temperature, pH value and time are respectively lower than those of the traditional chemical extraction technique, and the yellowish-brown humic acid yield is 35% or above and is much higher than that of the acid-alkali activation process under the same production cost. The technique provided by the invention has obvious cost advantage, and can obviously enhance the economic benefit of the production enterprise.

Description

technical field [0001] The invention belongs to the technical field of biological enzyme applications, and in particular relates to a process for activating lignite humic acid by using biological enzymes. Background technique [0002] Humic acid is an amorphous polymer compound formed by the remains of animals and plants through a series of chemical processes caused by the decomposition and transformation of microorganisms and the geological changes of the earth for hundreds of millions of years. It is widely distributed in soil, weathered coal, lignite, in carbonaceous rocks. Humic acid is mainly composed of several elements such as carbon, hydrogen, oxygen, nitrogen, and sulfur, and contains various functional groups such as hydroxyl, carboxyl, quinone, carbonyl, and methoxy groups. It is weakly acidic, cation-exchangeable, and chelating It is a good soil conditioner, which can promote the absorption of fertilizer nutrients and improve fertilizer efficiency when applied t...

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Problems solved by technology

Commonly used methods include caustic alkali dry / wet production process, ammonia water / ammonium bicarbonate activation process, strong acid oxidation hydrolysis process, sulfuric acid acetone extraction process, etc., but the above methods all have problems such as huge energy consumption, serious pollution, and low extraction rate ( The amount of alkali used in the traditional causticization method reaches 15%-40%; the temperature is 90-120°C, and the extraction time is 8-10 hours; the calculation amount of the strong acid oxidation method reaches 15%-40%; the temperature is 85-95°C, and the extraction time is 4- 8 hours), making it difficult to promote its production in industrialization due to factors such as environmental protection and cost