I. Introduction. With the continuous development of the coal mining industry, the discharge of coal mine wastewater is also increasing, which has a serious impact on the environment. Therefore, how to effectively treat coal mine wastewater has become an urgent problem to be solved. This paper will conduct an in-depth analysis of coal mine wastewater treatment technology, in order to provide a useful reference for relevant enterprises and researchers.
Second, the main characteristics and characteristics of coal mine wastewater.
Coal mine wastewater is mainly used in the process of coal mining, mineral processing, transportation and other wastewater. These wastewater contain a large amount of suspended solids, heavy metal ions, acidic substances and other harmful substances, which cause great harm to the environment and human health. Therefore, how to effectively treat this wastewater has become an urgent problem to be solved.
3. Introduction to coal mine wastewater treatment technology.
At present, the treatment technology for coal mine wastewater mainly includes the following types:
1.Natural purification.
Natural purification is a method of purifying and treating wastewater using microorganisms and plants in nature. This method mainly removes harmful substances such as suspended solids and heavy metal ions in wastewater through precipitation, filtration, oxidation and other methods, so that the wastewater can meet the discharge standard. The advantages of the natural purification method are low cost and simple operation, but the treatment effect is unstable and it takes a long time to meet the emission standard.
2.Chemical precipitation.
Chemical precipitation is a method of converting heavy metal ions in wastewater into insoluble precipitate by adding chemical agents to wastewater, and then removing precipitate by precipitation, filtration and other methods. The advantages of this method are that the treatment effect is good and the operation is simple, but it requires the addition of chemicals, and the treatment cost is high.
3.Activated carbon adsorption method.
Activated carbon adsorption method is a method that uses the adsorption properties of activated carbon to adsorb and treat harmful substances in wastewater. This method mainly adsorbs organic matter, heavy metal ions and other harmful substances in wastewater through activated carbon, so that the wastewater can be purified. The advantages of activated carbon adsorption method are good treatment effect and simple operation, but the adsorption capacity of activated carbon is limited, and the activated carbon needs to be replaced regularly.
4.Biological treatment.
Biological treatment is a method that uses the metabolism of microorganisms to purify and treat wastewater. This method mainly removes harmful substances such as organic matter and heavy metal ions in wastewater through the adsorption and degradation of microorganisms, so that the wastewater can be purified. The advantages of biological treatment are that the treatment effect is good and the operation is simple, but it requires the selection of appropriate microbial species and treatment conditions.
Fourth, the application and development prospect of coal mine wastewater treatment technology.
At present, coal mine wastewater treatment technology has been widely used and developed at home and abroad. In China, many coal enterprises have begun to use various wastewater treatment technologies to treat coal mine wastewater, and have achieved certain results. However, there are still some problems in practical application, such as unstable processing effect and high processing cost. Therefore, in the future, it is necessary to further research and develop more efficient and low-cost coal mine wastewater treatment technology and process to provide strong support for the sustainable development of coal enterprises.
V. Conclusions. The treatment of coal mine wastewater is an important part of the sustainable development of coal enterprises. In this paper, the common coal mine wastewater treatment technology is introduced and analyzed, and its application and development prospects are discussed. In the future, it is necessary to further strengthen the research and development of more efficient and low-cost coal mine wastewater treatment technologies and processes to provide strong support for the sustainable development of coal enterprises.