Heavy metal stabilizer for bottom mud in aquaculture pond, and manufacturing method and application thereof

Abstract

The invention relates to a heavy metal stabilizer for bottom mud in an aquaculture pond, and a manufacturing method and an application thereof. The heavy metal stabilizer comprises a microbial carrierand a composite microbial agent loaded on the microbial carrier, wherein the microbial carrier is a mixture of Mailuoning herb residue biomass carbon powder, tea residue powder, alternanthera philoxeroides powder and a binder; and a composite active bacterial liquid is obtained through the following steps: mixing a bottom mud sample and deionized water so as to obtain a supernatant diluent, carrying out culturing so as to obtain a seed solution of bacillus and yeast, adding an EM active bacterial liquid, and carrying out culturing under the condition of aerobic fermentation. The preparation method comprises the following preparation process: (1) allowing Mailuoning herb residues to be converted into biomass carbon at a high temperature, and mixing the biomass carbon with raw materials soas to obtain the microbial carrier; and (2) loading the composite microbial agent onto the microbial carrier. According to the invention, the bottom mud fermented by stacking with the heavy metal stabilizer can be used as a base fertilizer and applied to soil, so the fertility of the soil is improved; the effectiveness of heavy metals in the soil is reduced; the usage amount of an inorganic fertilizer is decreased; and the yield and quality of crops are improved.

Description

technical field [0001] The invention relates to the field of agriculture, in particular to a production method and application of a heavy metal stabilizer for bottom sludge in aquaculture ponds. Background technique [0002] The bottom mud of aquaculture ponds is rich in organic matter, N, P, K and other nutrient elements. It is a high-quality organic fertilizer. It can not only improve soil fertility, but also increase crop yield. However, due to natural or man-made factors such as atmospheric subsidence, surface runoff, unreasonable application of fishing medicine and bait, a large amount of toxic heavy metals enter the aquaculture water environment, and are finally enriched in the sediment through adsorption, precipitation, etc. The heavy metal contents of Pb, Cu, Zn and Cr in the soil were significantly higher than the local soil background value and the content of Cd was seriously exceeded (≥0.5mg / kg). Therefore, if the heavy metals in the sediment are not repaired in ...

AI Technical Summary

Problems solved by technology

Microbial activity is the key factor affecting the stabilization of heavy metals in sediment by microbial inoculation method. At present, most inoculation agents are directly put into the sediment, which may easily cause microbial inactivation or loss. Therefore, the development of new microbial carriers to ensure microbial activity is a main technology of this patent breakthrough

The inventor's previous studies have shown that biomass charcoal has a porous structure and a high specific surface area, and the surface contains various functional groups such as hydroxyl, carbonyl, and carboxyl. It is an excellent microbial immobilization carrier and heavy metal adsorbent, but it is affected by different raw materials and preparation processes. , the physical and chemical properties of the prepared carriers are quite different, and the adsorption and fixation effects on heavy metals are also different.

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