Process for treating and recycling mine acid heavy metal wastewater

A mine acid wastewater and wastewater treatment technology, applied in the removal of nickel ions and fluoride ions, mine acid heavy metal wastewater treatment and reuse process, copper, and iron in wastewater fields, can solve production and life losses, and threaten the safety and ecology of the surrounding environment system, low pH, etc.

Inactive Publication Date: 2014-05-07
HANGZHOU SHUANGBO ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of mine wastewater contains high concentration of heavy metal ions and low pH value. Direct discharge without treatment will se

Method used

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  • Process for treating and recycling mine acid heavy metal wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A mining enterprise discharges 80t / d of acidic heavy metal wastewater, and the specific water quality indicators are as follows:

[0023] Unit: mg / L

[0024] water quality index

[0025] The waste water is treated by adopting the process of the present invention, specifically, the waste water is introduced into an integrated reaction precipitation system, and after the process of dosing, stirring, reaction, flocculation and precipitation is completed, the supernatant is treated through an activated carbon filter tank. After being monitored by a third-party professional organization, the water quality after treatment is shown in the table below:

[0026]Unit: mg / L

[0027] water quality index

[0028] The water quality meets the requirements of "Urban Sewage Recycling Industrial Water Quality" (GB / T19923-2005), and can be reused as cleaning water.

Embodiment 2

[0030] A mining enterprise discharges 50t / d of acidic heavy metal wastewater, and the specific water quality indicators are as follows:

[0031] Unit: mg / L

[0032] water quality index

[0033] Using the process of the present invention, waste water is introduced into an integrated reaction and precipitation system, and after the processes of dosing, stirring, reaction, flocculation and precipitation are completed, the supernatant is treated by an activated carbon filter tank. Monitored by the local environmental protection bureau, the water quality indicators at the outlet of the activated carbon filter tank are shown in the table below.

[0034] Unit: mg / L

[0035] water quality index

[0036] The water quality meets the requirements of "Urban Sewage Recycling Industrial Water Quality" (GB / T19923-2005), and can be reused as cleaning water in the production process of ...

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Abstract

The invention discloses a process for treating and recycling mine acid heavy metal wastewater. The process comprises the steps of collecting the mine acid heavy metal wastewater and then introducing the mine acid heavy metal wastewater into an integrated reactive precipitation system, and completing the processes of feeding chemicals, stirring, reacting, flocculating and precipitating; treating a supernatant in a reaction tank with activated carbon and then recycling as cleaning water; and concentrating sludge slurry at the lower part of the reaction tank and then forming the concentrated sludge into mud cakes for outward transportation and treatment. The mine acid heavy metal wastewater can be recycled after being treated through the process, and as a result, discharge of pollution is reduced, and the usage amount of water resources is also reduced.

Description

technical field [0001] The invention relates to a process for treating and reusing acidic heavy metal wastewater in mines, in particular to a method for removing iron, copper, nickel ions and fluorine ions in wastewater, and belongs to the fields of sewage treatment and reclaimed water reuse. Background technique [0002] With the rapid development of social economy, the human demand for mineral resources is increasing day by day, and the discharge of industrial wastewater generated during the mining and processing of mineral resources is also increasing. According to statistics, the discharge of various types of mine wastewater in my country accounts for about 10% of the total discharge of industrial wastewater in the country. Mine wastewater has become one of the industrial pollution that needs to be solved urgently in our country. [0003] The most harmful mine wastewater is mine acid wastewater (AMD), which is mainly formed by the oxidation of air, precipitation and bact...

Claims

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Application Information

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IPC IPC(8): C02F9/04
Inventor 赵伟荣冯文杰
Owner HANGZHOU SHUANGBO ENVIRONMENTAL PROTECTION TECH
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