Activated sludge organic fertilizer and preparation method thereof

Abstract

The invention relates to an activated sludge organic fertilizer. The activated sludge organic fertilizer utilizes activated sludge as a main raw material; a plurality of components like straw powder, waste domestic fungi and pyroligneous liquor are added; and the pyroligneous liquor is beneficial for improving vitality of roots of crops, promoting absorption of nutrients by plants, accelerating fermentation speed, reducing a production period and lowering production cost. Compared with traditional organic fertilizer, the activated sludge organic fertilizer provided by the invention has the advantages that compatibility is more reasonable; more complete nutrient elements are provided; harmful components like heavy metals in the activated sludge are removed; full play is given to nutrients like polysaccharides, proteins, trace elements and a plurality of mineral matters in the activated sludge; and through cooperation between the activated sludge and other components, the activated sludge organic fertilizer is capable of regulating nutrient equilibrium of plants and improving disease resistance of plants. The activated sludge organic fertilizer realizes recycling of residual activated sludge left after treatment of sewage, saves resources, is beneficial for environmental protection and enables agricultural production to be in virtuous circle and be sustainably developed.

Description

technical field [0001] The invention belongs to the technical field of organic fertilizers, and in particular relates to an activated sludge organic fertilizer and a preparation method thereof. Background technique [0002] In recent years, as more and more urban sewage treatment plants have been put into operation, especially some large and medium-sized sewage treatment plants have been put into operation, while the sewage treatment rate in my country has continued to increase, the sludge output has also increased rapidly. How to treat and dispose These sludges have always been a matter of concern from all sides. [0003] After the treatment capacity of activated sludge in sewage treatment plants decreases, the utilization value of excess activated sludge decreases. The treatment of excess activated sludge is also an important problem faced by sewage treatment plants. Excess sludge mainly contains microorganisms, which are adsorbed by microorganisms. Organic matter and micr...

AI Technical Summary

Problems solved by technology

However, studies have shown that the residual activated sludge after sewage treatment also contains harmful substances such as heavy metals. If it is used directly as a fertilizer, it will not only fail to meet the needs of plants for nutrients, and the fertilizer efficiency will be low. With the increase of application times, the heavy metals in the sludge will gradually accumulate on the surface of the soil, resulting in cumulative pollution to the soil.