Immobilized granules for treating acidic mine wastewater, and preparation and application methods thereof

A technology of acid mine wastewater and particles, which is applied in chemical instruments and methods, mining wastewater treatment, adsorption water/sewage treatment, etc., and can solve problems such as small specific surface area and unsuitable treatment of shallow loose groundwater pollution.

Active Publication Date: 2017-06-20
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the small specific surface area of ​​zero-valent iron with conventional particle sizes, not only the removal effect is inhibited to a certain extent, but also larger zero-valent iron particles are not suitable for the pollution treatment of shallow loose groundwater.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] An immobilized granule for treating acidic mine wastewater, the immobilized granule includes components and their weight percentages: 20% sulfate-reducing bacteria sludge, 5% nano-iron composite particle material, 5% hydrotalcite / water Talc roasting product, 5% polyvinyl alcohol, 0.2% sodium alginate, 5% biomass material and 59.8% distilled water; wherein:

[0076] Described sulfate-reducing bacteria sludge MLVSS concentration is 10mg / L, and preparation process is as follows:

[0077] (1) Take municipal activated sludge, dilute it 10 times, take out 25mL and add it to 500mL improved Starkey medium, and cultivate it under constant temperature and anaerobic conditions at 35°C for 3 weeks to form sulfate-reducing bacteria as the dominant strain mixed sulfate-reducing bacteria sludge flora;

[0078] (2) Cultivate the mixed sulfate-reducing bacteria sludge flora for 2 weeks. When the bottle cap is opened, a strong smell of rotten eggs can be smelled. 2+ The solution can im...

Embodiment 2

[0106] An immobilized granule for treating acidic mine wastewater, the immobilized granule includes components and their weight percentages: 40% sulfate-reducing bacteria sludge, 10% nano-iron composite particle material, 15% hydrotalcite / water Talc roasted product, 9% polyvinyl alcohol, 1.5% sodium alginate, 20% biomass material and 4.5% distilled water; wherein:

[0107] Described sulfate-reducing bacteria sludge MLVSS concentration is 15mg / L, and preparation process is as follows:

[0108] (1) Take the landfill leachate sludge, dilute it 20 times, take out 25mL and add it to 500mL improved Starkey medium, and cultivate it under constant temperature and anaerobic conditions at 38°C for 2 weeks to form sulfate-reducing bacteria as the dominant bacteria mixed sulfate-reducing bacteria sludge flora;

[0109] (2) Cultivate the mixed sulfate-reducing bacteria sludge colony for 3 weeks. When the bottle cap is opened, a strong smell of rotten eggs can be smelled. 2+ The solution ...

Embodiment 3

[0137] An immobilized granule for treating acidic mine wastewater, the immobilized granule includes components and their weight percentages: 30% sulfate-reducing bacteria sludge, 5% nano-iron composite particle material, 15% hydrotalcite / water Talc roasted product, 9% polyvinyl alcohol, 0.5% sodium alginate, 5% biomass material and 35.5% distilled water; wherein:

[0138] Described sulfate-reducing bacteria sludge MLVSS concentration is 15mg / L, and preparation process is as follows:

[0139](1) Take landfill leachate sludge, dilute it 10 times, take out 25mL and add it to 500mL improved Starkey medium, and cultivate it under constant temperature and anaerobic conditions at 36°C for 2 weeks to form sulfate-reducing bacteria as dominant bacteria mixed sulfate-reducing bacteria sludge flora;

[0140] (2) Cultivate the mixed sulfate-reducing bacteria sludge flora for 2 weeks. When the bottle cap is opened, a strong smell of rotten eggs can be smelled. 2+ The solution can immedia...

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PUM

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Abstract

The invention relates to immobilized granules for treating acidic mine wastewater. The immobilized granules for treating acidic mine wastewater comprise the following components in percentage by weight: 20-40% of sulfate reducing bacteria sludge, 5-10% of nano iron composite granular material, 5-15% of hydrotalcite / hydrotalcite roasted product, 5-9% of polyvinyl alcohol, 0.2-1.5% of sodium alginate, 5-20% of biomass material and 4.5-59.8% of distilled water. The preparation method comprises the following steps: adding the polyvinyl alcohol and sodium alginate into the distilled water, and swelling and stirring to form a bubble-free gel; adding the nano iron composite granular material and hydrotalcite / hydrotalcite roasted product into the gel, and cooling by stirring to form a cooled gel; and adding the sulfate reducing bacteria sludge, dropwisely adding the saturated boric acid solution while stirring, and crosslinking to obtain the immobilized granules. The application method comprises the following steps: activating the immobilized granules, putting in a permeable reaction wall, and treating the acidic mine wastewater. On the premise of lowering the cost, the immobilized granules effectively remove heavy metals and anionic pollutants in the acidic mine wastewater, and have obviously higher treatment efficiency.

Description

[0001] Technical field: [0002] The invention belongs to the technical field of water pollution control engineering, and in particular relates to an immobilized particle for treating acid mine wastewater and a preparation and use method thereof. [0003] Background technique: [0004] Mineral reserves play an important role in economic construction and social development, and are the resource guarantee for the implementation of my country's sustainable development strategy. However, due to the long-term development of mineral resources, the hydrogeological environment and ecological system of the mining area have been greatly damaged, leading to severe water shortage in the mining area, aggravating the water supply shortage in water-scarce areas, and affecting local economic construction and residents' lives. Acidic mine wastewater has a low pH value, which often contains copper, zinc, nickel, lead, chromium, iron, mercury, manganese and other highly toxic heavy metal ions, an...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20C02F103/10
Inventor 狄军贞王明昕鲍娟郭旭颖李拓达杜志超赵微薛淋丹王婷婷
Owner LIAONING TECHNICAL UNIVERSITY
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