Method for treating acidic mine wastewater by micro-electrolysis enhanced sulfate reducing bacteria and micro-electrolysis bioreactor

A technology of acid mine wastewater and bioreactor, which is applied in the direction of electrochemical biocombination treatment, chemical instruments and methods, special compound water treatment, etc. It can solve the problems of poor tolerance of heavy metals, insufficient electron donors, low sulfate reduction rate, etc. problems, achieve low cost, improve electronic utilization, reduce cost input and energy consumption
CN111362425AActive Publication Date: 2020-07-03LIAONING TECHNICAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
LIAONING TECHNICAL UNIVERSITY
Publication Date
2020-07-03

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Abstract

The invention discloses a method for treating acidic mine wastewater by micro-electrolysis enhanced sulfate reducing bacteria and a micro-electrolysis bioreactor. By filling a reactor with an iron-carbon micro-electrolysis filler and inoculating sulfate reducing bacteria, part of metal ions in the acidic mine wastewater is rapidly reduced through a micro-electrolysis reaction between iron and carbon, the pH of wastewater is increased, and the problem that sulfate reducing bacteria are inhibited and harmed by low pH and heavy metals is solved; the sulfur reduction rate of sulfate reducing bacteria is increased through electrical stimulation generated by micro-electrolysis, and part of metals is removed in a sulfide precipitation form; Fe<3+> and alkalinity are generated, part of metals is removed in a Fe(OH)3 coagulation and hydroxide precipitate mode. Compared with other bioreactors, the micro-electrolysis bioreactor has the advantages of high sulfate and heavy metal removal efficiencyand high system stability.
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Description

technical field

[0001] The invention relates to the field of waste water treatment, in particular to a method for micro-electrolysis strengthening sulfate-reducing bacteria to treat acid mine wastewater and a micro-electrolysis bioreactor. Background technique

[0002] At present, in the process of coal production in my country, the annual discharge of acid mine drainage (AMD) reaches 3.6 billion tons, accounting for nearly one tenth of the total discharge of industrial wastewater in the country. If it is not handled properly, it will cause environmental pollution. The damage is serious and often irreversible. The main methods to deal with it are neutralization method, wetland method and biological method. Among them, the neutralization method is likely to generate a large amount of solid waste that is difficult to handle and cause secondary pollution. The wetland method has high treatment efficiency, but it occupies a large area and is complex in management and maintenance,...

Claims

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