Biological activated lignite synergistic sulfate reducing bacteria sludge immobilized particles as well as preparation method and application thereof

Abstract

The invention provides biological activated lignite synergistic sulfate reducing bacteria sludge immobilized particles and a preparation method and application thereof. The immobilized particles can be used for reducing, adsorbing and removing various metal cations and anions in acid mine wastewater, and the preparation method of the immobilized particles comprises the following steps: 1) polyvinyl alcohol and sodium alginate are added into water, and swelling, heating and stirring are conducted until bubble-free gel is formed; 2) lignite is added into the gel obtained in the step 1), and uniform stirring and cooling are conducted; 3) rhodopseudomonas sphaeroides liquid and sulfate reducing bacteria sludge are added into the gel mixture obtained in the step 2), the mixture is uniformly stirred, and particles are prepared from the uniformly stirred mixture; 4) the particles obtained in the step 3) are dropwise added into a CaCl2-containing saturated boric acid aqueous solution with the pH value of 5.0-7.0, and crosslinking is carried out under stirring; and then normal saline is used for washing, and moisture on the surface is adsorbed to obtain the biological activated lignite synergistic sulfate reducing bacteria sludge immobilized particles.

Description

Technical field [0001] The present invention belongs to the technical field of water pollution control engineering, and more particularly to a particulate material that can effectively treat a variety of severe heavy metal ions and difficult to remove the anion of the acid mine wastewater, and specifically, a biologically activated brown coal similar sulfate reduction bacteria. Mud solidified particles and preparation methods and applications thereof. Background technique [0002] The rapid development of industrial is inseparable from the demand for mine resources. However, in the process of exploitation, a sulfur mine, tailings library, etc., after years of weathering, shower, etc., have gradually formed acid mines that have more affected environmental impact. Wastewater. Acidine mine wastewater (AMD) has a low pH, containing Cu, Zn, Pb, Fe, Mn, CR isothermally high concentrations of heavy metal ions and high sulfate content. However, approximately 10% of the acid mine wastewat...

AI Technical Summary

Problems solved by technology

Under anaerobic conditions, acidic conditions in AMD can provide more electrons for the growth of sulfate-reducing bacteria (SRB), and SRB makes full use of these electrons to convert SO 4 2- Revert to S 2- , some of which generate CuS, ZnS, FeS, etc. to remove some heavy metals, but the condition of peracidity will affect the activity of SRB. In this process, SRB must rely on sufficient carbon sources to achieve the purpose of removing heavy metal ions

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