Controlled-release carbon source material for repairing polluted underground water organisms and preparation method thereof

Abstract

The invention discloses a controlled-release carbon source material for repairing polluted underground water organisms and a preparation method thereof and belongs to the field of underground water repairing. The controlled-release carbon source material comprises a core and a shell wrapping the core, wherein the core comprises the following components in percentage by weight: 40 to 86 percent ofcarbon releasing raw material, 1 to 25 percent of nutritional raw material, 5 to 45 percent of plastic bonding raw material, 5 to 20 percent of high-permeability raw material and the balance of water; the shell comprises the following components in percentage by weight: 10 to 40 percent of carbon releasing raw material, 1 to 10 percent of nutritional raw material, 20 to 80 percent of plastic bonding raw material, 0 to 40 percent of high-permeability raw material and the balance of water; and the controlled-release carbon source material is prepared by a compound formula consisting of the carbon releasing raw materials, nutritional elements and multi-component inorganic combined raw materials. The controlled-release carbon source material meets a microbial nutrition demand and requirementsfor long-time stable material supply during underground water repairing, certain mechanism strength and uniform sphericity; furthermore, the defects of high carbon loss, uncontrollable releasing rateand the like in the conventional carbon source compensation method are overcome; and the continuity of the underground water organism repairing effect is realized.

Description

technical field [0001] The invention relates to the technical field of bioremediation of polluted groundwater, in particular to a slow-release carbon source material for bioremediation of polluted groundwater and a preparation method thereof. Background technique [0002] Affected by the continuous increase in the types and quantities of pollutants discharged from environmental water bodies, the degree and area of ​​inorganic pollution, organic pollution, and heavy metal pollution in groundwater are increasing year by year. At present, groundwater is one of the main sources of drinking water in some cities and towns at home and abroad, and drinking polluted groundwater will cause direct fatal harm or indirect harm to human body. [0003] At present, the commonly used groundwater remediation methods can be divided into biological remediation and physical and chemical treatment methods in terms of technical principles. Although physical and chemical remediation methods have h...

AI Technical Summary

Problems solved by technology

However, the carbon sources supplemented by conventional methods (such as ethanol, acetic acid, glucose, citric acid and its salts, succinic acid, fructose, etc.) are easily lost under the conditions of groundwater hydrodynamic field, and adding other carbon sources (such as bark, straw, etc.) , sawdust, etc.) and there are deficiencies such as secondary pollution of water quality, easy blockage, uncontrollable carbon source, etc.

These methods and carbon source dosing methods cannot sustainably and stably supply and supplement the carbon source and micronutrient elements required for microbial metabolism, which greatly affects the effect and sustainability of groundwater bioremediation

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