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Method for simultaneously treating refuse leachate and acidy mine drainage

A technology for landfill leachate and acid mines, applied in chemical instruments and methods, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc. Treatment efficiency, the effect of improving the degradation rate

Inactive Publication Date: 2015-07-15
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, when using microbial methods to treat acid mine drainage, it is generally necessary to add additional carbon sources for microbial growth, which increases the cost of treatment to a certain extent.

Method used

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  • Method for simultaneously treating refuse leachate and acidy mine drainage
  • Method for simultaneously treating refuse leachate and acidy mine drainage
  • Method for simultaneously treating refuse leachate and acidy mine drainage

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Embodiment Construction

[0021] In order to make the technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the drawings and embodiments.

[0022] The main components of landfill leachate and acid mine drainage used in this embodiment are as follows: landfill leachate COD about 50000mg / L, NH 4 + -N 2000mg / L; in acidic mine drainage, sulfate radical 29975mg / L, pH 2.75, COD 429.6mg / L, total iron 133mg / L.

[0023] Such as figure 1 As shown, the present embodiment processes landfill leachate and acid mine drainage simultaneously as follows:

[0024] A. Calculate landfill leachate and acid mine drainage according to m(COD) / m(SO 4 2- ) are mixed in a ratio of about 3:1 to form a mixed solution; the pH of the mixed solution is adjusted with NaOH solution to obtain pH adjusted waste water of about 7.5;

[0025] B. Continuously inject the regulated wastewater into the anaerobic reactor from bottom to top, and control the hyd...

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Abstract

The invention discloses a method for simultaneously treating refuse leachate and acidy mine drainage. The method is characterized by comprising the following steps: firstly, mixing refuse leachate with acidy mine drainage in proportion to form adjusting wastewater containing high-concentration COD and sulfate, and then introducing adjusting wastewater into a biological treatment system including an anaerobic reactor, an anoxic reactor and an aerobic reactor for treatment; and more than 80% of sulfate and 80%-90% of COD in drained water of the anaerobic reactor are removed by virtue of lots of anaerobic microorganisms. The anaerobic reactor is communicated with the anoxic reactor and the aerobatic reactor, the anoxic reactor is communicated with the aerobic reactor, the aerobic reactor is utilized for carrying out aerobic nitration reaction by virtue of a reflux ratio regulation process, and effluent flows back to the anoxic reactor to cause denitrification reaction, so that the removal rate of total nitrogen reaches almost 100%. By implementing the method, organic matters, sulfate and heavy metal ions in refuse leachate and acidy mine drainage can be efficiently removed, the denitrification is achieved, and the waste is treated by virtue of waste, so that the cost is relatively low.

Description

technical field [0001] The invention relates to the technical field of refractory wastewater treatment, in particular to a method for simultaneously treating landfill leachate and acid mine drainage. Background technique [0002] Landfill leachate has a high content of organic matter and contains a large amount of refractory organic matter, such as hydrocarbons and their derivatives, esters, alcohols and phenols, amides and ketone aldehydes. The prominent features of landfill leachate are many kinds of organic pollutants with high concentration, poor biodegradability, high dissolved salt and high concentration of ammonia nitrogen. At present, the treatment of landfill leachate is divided into two types: on-site treatment and off-site treatment according to the treatment facilities. In short, on-site treatment refers to the solution of building a sewage treatment station in a landfill; off-site treatment is to combine landfill leachate and urban sewage into a sewage treatmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
Inventor 王进李玉龙岳正波罗筱枭徐诚陈天虎
Owner HEFEI UNIV OF TECH
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