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

A bioremediation and slow-release carbon source technology, applied in chemical instruments and methods, biological water/sewage treatment, water/sludge/sewage treatment, etc. supply and replenishment, secondary pollution of water quality, etc., to ensure long-term stable operation, overcome the easy loss of carbon sources, and the effect of small water resistance coefficient

Active Publication Date: 2012-06-13
HOHAI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0029] The preparation process of slow-release carbon source materials for bioremediation of contaminated groundwater is:

[0030] Carbon-releasing raw materials (corn starch), nutritional raw materials (EDTA·2Na, KH 2 PO 4 , ZnSO 4 ·7H 2 O, CuSO 4 ·5H 2 O), plastic bonding raw materials (ordinary Portland cement, fly ash, attapulgite) and high-permeability raw materials (diatomite) and other materials are mixed evenly; other than high-permeability raw materials (diatomite) The raw material is crushed to 150 mesh, and the high permeability raw material (diatomaceous earth) is crushed to 75 mesh. First, mix various core materials in proportion, mix well, add water to the granulator and roll to a spherical shape until the core particle size is 0.5cm-0.6cm, and dry naturally for 2 days after the core material is made; then put it back into the granulator In the granulator, add the raw material of the shell material, add water to the granulator and granulate again, roll to a...

Embodiment 2

[0035] The preparation process of the slow-release carbon source material used for the bioremediation of polluted groundwater is: carbon-releasing raw material (wheat starch), nutrient raw material (KH 2 PO 4 , ZnSO 4 ·7H 2 O, CaCl 2 2H 2 O, FeSO 4 ·7H 2 O), plastic bonding raw materials (composite Portland cement, attapulgite, montmorillonite) and high permeability raw materials (diatomite, fly ash) and other materials are mixed evenly; other raw materials except high permeability raw materials Grinding to 200 mesh, high permeability raw materials to 100 mesh. First, mix the various core materials in proportion, mix well, add water to the granulator and roll to a spherical shape until the core particle size is 0.8cm-1.0cm, after the core material is made, dry it in an oven at 25°C for 5 hours; then Put it back into the granulator, add the shell material raw materials, add water to the granulator and granulate again, roll to a spherical shape, and the thickness of the s...

Embodiment 3

[0040] The preparation process of the slow-release carbon source material used for bioremediation of polluted groundwater is: carbon-releasing raw material (bagasse), nutrient raw material (KH 2 PO 4 , FeSO 4 ·7H 2 O, MnCl 2 4H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 O), plastic bonding raw materials (ordinary Portland cement, fly ash, kaolin) and high-permeability raw materials (50-125 mesh fine quartz sand) are mixed evenly; other raw materials except high-permeability raw materials are crushed to 200 mesh. First, mix various kernel raw materials in proportion, mix well, add water to the granulator and roll until the kernel particle size is 1.0cm-1.2cm, after the kernel material is made, dry it in an oven at 60°C for 3 hours; then Put it back into the granulator, add the shell material raw materials, add water to the granulator and granulate again, roll to a spherical shape, and the thickness of the shell is about 3-4mm; place the prepared slow-release carbon source material...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/00
Inventor 阮晓红朱晓明尹琳李明
Owner HOHAI UNIV
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