Zero-discharge treatment technology for coal mine water
June.03,2025
Conventional treatment technology is mainly used to remove fine suspended solids (SS) particles and colloidal pollutants in mine water. The treatment process can meet the requirements of simple reuse. At the same time, it is also a pretreatment technology for deep treatment and zero-discharge treatment of mine water. It is currently the most widely used process technology for coal mining enterprises to treat mine water. Coagulants and coagulants need to be added during the treatment process. The most commonly used coagulants and coagulants are polyaluminium chloride (PAC) and polyacrylic amide (PAM).
Compared with conventional treatment technology, high-density sedimentation technology (heavy medium rapid sedimentation) adds high-density media (generally micro sand is more common) to the water in addition to adding PAC and PAM. SS in water aggregates with high-density media as the “core” to form larger flocs, which have larger density and volume than flocs in conventional treatment technologies. Therefore, the sedimentation rate of the flocs also becomes faster accordingly. The volume of the sedimentation tank can be reduced to 20% to 25% of conventional treatment, and the land occupation is greatly reduced, which is particularly suitable for downhole treatment.
