Biological solidification and stabilization method of bottom mud in riverways and lakes

Abstract

The invention relates to improvement of a biological solidification and stabilization method of dredge bottom mud. The biological solidification and stabilization method is characterized by comprising the following steps: primarily dehydrating clay particles which have less possibility of being dehydrated, and mixing and stirring the dehydrated clay particles with dry soil to form mixed soil; and spraying a compound biological enzyme liquid at least consisting of reductase, amylase, cellulase, esterase, lipase, ligninase, prolease, urease, xylanase and a detergent surface active agent to be mixed with the mixed soil, then compacting and solidifying. The biological solidification and stabilization method has the advantages of short process flow and simplicity; by utilizing the method, the volume of the bottom mud to be solidified and stabilized is greatly reduced, the volume of the bottom mud to be solidified after classification and dehydration is 10%-15% of that of the bottom mud to be conventionally solidified, the processing flow is reduced compared with the existing biological enzyme solidification, the solidification cost is reduced, the solidification strength is high, the solidification filling shear strength can reach the Mpa grade, thus the method can be used for road construction, parking lots, slope solidification, reservoir surface solidification, refuse landfill bottom solidification and seepage prevention and public road building. By using the method, the outlet problem of the dredge bottom mud is effectively solved, and a novel decrement and solidification process for the bottom mud in the lakes is created.

Description

technical field [0001] The invention is an improvement on biological solidification and stabilization of bottom mud of river courses and lakes, and in particular relates to a biological solidification and stabilization method with low solidification cost, high solidification strength and no secondary pollution. Background technique [0002] River dredging has become a very important topic in water conservancy work. In river dredging projects, the dredged sediment is in the form of muddy water, with a general moisture content of 75%-90%. With the development of modern industry and life, the content of organic matter and heavy metals in sediments tends to increase. Due to the large amount of organic pollutants and heavy metals, the outlet and resource utilization of dredging sediments have become bottlenecks, especially the low-cost solidification and utilization of sediments and harmful organic pollutants. The solidification of pollutants and heavy metals has become the most...

AI Technical Summary

Problems solved by technology

Although this method proposes to use reduction treatment, the method is complicated and long, resulting in high treatment costs; secondly, the specific biological curing agent is not disclosed, so the actual curing effect (such as curing strength) is difficult to predict, especially for harmful organic matter and heavy metals Furthermore, the actual hydrocyclone cannot dehydrate the 0.025-0.075mm powder, so its water content is high, and the biosolid agent cannot effectively cure it