▎ 摘　　要

NOVELTY - Producing ecological environment-friendly nutrient soil involves pretreating acquired lake sludge to obtain pretreated sludge, adding a soil bulking agent to the pretreated sludge under stirring to carry out microwave decomposition on the obtained mixture, and then preparing sludge material with water content suitable for biological treatment through superimposed heat removal. The peanut shell powder and graphene oxide suspension are mixed and filtered to obtain peanut shell powder impregnated with graphene oxide suspension. The impregnated peanut shell powder is mixed with nano-silicon dioxide to obtain a mixture. The obtained mixture is mixed with water to obtain a mixture, which is carbonized to obtain a hydrated carbon. The obtained hydrated carbon is dried to prepare modified organism charcoal. USE - Method for producing ecological environment-friendly nutrient soil. ADVANTAGE - The method enables to produce ecological environment-friendly nutrient soil by lake sludge, which has high water removing efficiency, good water removing effect, and provides the necessary nutrient element for the growth of the plant without using chemical nitrogen fertilizer and chemical pesticide, and reduces the harm of the pathogenic bacteria, where the pest to the plant and is good for the normal growth and development of plant. DETAILED DESCRIPTION - Producing ecological environment-friendly nutrient soil involves pretreating acquired lake sludge to obtain pretreated sludge, adding a soil bulking agent to the pretreated sludge under stirring to carry out microwave decomposition on the obtained mixture, and then preparing sludge material with water content suitable for biological treatment through superimposed heat removal. The peanut shell powder and graphene oxide suspension are mixed and filtered to obtain peanut shell powder impregnated with graphene oxide suspension. The impregnated peanut shell powder is mixed with nano-silicon dioxide to obtain a mixture. The obtained mixture is mixed with water to obtain a mixture, which is carbonized to obtain a hydrated carbon. The obtained hydrated carbon is dried to prepare modified organism charcoal. An appropriate amount of fresh eggshells is cleaned, dried, and pulverized to obtain a mixture containing eggshell film and eggshell powder. The obtained powder mixture is soaked in sodium chloride solution for 1-2 hours, stirred for 15-25 minutes and the supernatant is removed, and then the solid insoluble in the solution is placed in a drying oven to be dried to obtain the crude eggshell powder with eggshell membrane. The refined eggshell powder can be obtained by sieving coarse eggshell powder with 120-180 mesh. The raw materials are mixed uniformly, sprayed water to obtain the mixed material A, fermented at room temperature for 3-4 months, and vacuum filtered to obtain mixed material B. The mixed material A and mixed material B are staggered and layered to form a fermentation pile, which is fermented for 10-20 days at 50-65degrees Celsius for 8-12 days. The treated lake sludge, soil, eggshell powder, modified biochar, animal manure, microbial inoculum, and soil conditioner are weighed in proportion. The treated lake silt, soil, eggshell powder, animal manure, and microbial inoculants are mixed with heap or trough fermentation. The fermented product is extruded and dehydrated by extrusion dehydration equipment to obtain fragmented nutrient soil and dehydrated water. The nutrient soil can be obtained by crushing and shaping the fragmented nutrient soil, and uniformly mixed with the modified biochar and soil conditioner.