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The development and utilization of mine water is an effective way to ease the water shortage in mine water stress. Less emissions and organic pollutants of the mine water is relatively stable, relatively easy to handle, making the mine water resources development and utilization feasibility, mine water resources development and utilization of mine water has necessity. Mine water resource utilization, especially in the severe water shortage in northern Shaanxi mine will have a good social, environmental and economic benefits. Papers in order to account for about 60% of the northern part of the focus in China coal mine inflow of mine water containing suspended solids as the research object, the main treatment process coagulation laboratory tests. Screened representative flocculant polyaluminum chloride (PAC), polymeric ferric sulfate (PFS), PAC iron (PAFC), polypropylene amide (PAM), chitosan (CTS), in these agents carried out a series of coagulation beaker experiment to determine the best flocculant PAFC, the best dosage of 15 mg / L, the most suitable pH 7-9 range, the pharmaceutical the mine water turbidity can The removal rate of 90% or more, and the COD removal of 60% or more. Organic natural polymer flocculant chitosan has the advantages of natural, non-toxic, safe for drinking water treatment has its unique advantages. Chitosan for mine water treatment Preliminary obtained optimal dosage of 1.5mg / L, turbidity removal efficiency of 46.5%, chemical oxygen demand (COD) removal rate was 66.7%. The optimal dosage, pH about 5 better flocculation, turbidity and chemical oxygen demand (COD) removal rate could reach 67.2% and 64.8%, respectively. Complex inorganic polymer flocculant PAFC and organic polymer flocculant PAM, CTS test, through two L 9 (3 4 ) orthogonal design of experiments to determine the most suitable compound and pH. Seen through the intuitive analysis, the PAFC PAM complex experiments factors affect the turbidity of the primary and secondary relationship as follows: PAFC dosage amount, pH value, PAM dosage. The optimum coagulation reaction conditions: the PAM dosage is 0.2 mg / L, PAFC dosage to 15mg / L, the water's pH 9. CTS and the PAFC complex with experiment the influencing factors of the primary and secondary relationship as follows: PAFC dosage, CTS dosage, pH value. The optimum coagulation reaction conditions: CTS dosing 1.5mg / L PAFC dosage of 15mg / L, the pH value of the water is 9. Finally, based on the analysis of coagulation mechanism chosen flocculant coagulation principle of give some explanation.
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