某煤矿废水处理的试验研究

Experimental Study on Treatment of Wastewater From a Coal Mine

论述了煤在我国能源供应方面的主力军地位,以山西朔州怀仁矿区废水作为研究对象,采用自行设计的混凝工艺,研究了工艺处理过程中SS的去除效果以及混凝过程中需投加的最佳用量,结果表明:相比进水,SS浓度在调节池变化,经混凝池后SS浓度增大较多,SS的去除主要是在沉淀池和过滤池中,这两个反应池内SS的去除率分别为55.36%和96.47%;当添加PAC或者PAF为混凝剂时,煤矿废水总硬度和SO_4^(2-)的去除率随投加的Ca(OH)_2浓度的增加而增大,当Ca(OH)_2浓度为1g·L^(-1)时为最佳投药量;随PAC和PAF浓度的增加,废水中总硬度和SO_4^(2-)的去除率逐渐增大,当PAC和PAF投加量均为35 mg·L^(-1)时为最佳投药量。

The main position of coal in China’s energy supply was discussed.Taking the wastewater from Huairen Mine in Zhangzhou,Shanxi as the research object,the self-designed coagulation process was used to study the removal effect of SS during the process and the best dosage for coagulation.The results showed that,compared with the influent water,the SS concentration changed in the adjustment tank,and the SS concentration increased more after the coagulation tank.The removal of SS was mainly realized in the sedimentation tank and the filtration tank.The removal rates of SS in the two reaction tanks were 55.36%and 96.47%,respectively.When PAC or PAF was added as coagulants,the total hardness of coal mine wastewater and the removal rate of SO42-were related to the concentration of added Ca(OH)2.The optimum dosage of Ca(OH)2 was 1 g·L-1;the total hardness and SO42-removal rate of wastewater gradually increased with the increase of PAC and PAF concentration.The optimal dosages of PAC and PAF all were 35 mg·L-1.