聚硅酸铝铁絮凝剂的制备及处理工业废水的实验研究

Experimental Study on Preparation of the Polysilicate Aluminium Ferric Flocculant and Treatment of Wastewater by Industry

采用粉煤灰、工业废硫酸和硫铁矿渣为原料,通过自制的聚铁和聚铝,制备了不同Si/(Al+Fe)摩尔比的聚硅酸铝铁(PSAF)絮凝剂。实验结果表明:与传统无机盐絮凝剂相比,PSAF的絮凝效果较好,COD及色度去除率能达到78.62%和83.56%以上。实验得到PSAF最佳制备条件:Si/(Fe+Al)=1/20,Fe/Al=1。废水处理最佳条件:pH=7,加药量为0.08 mL/200 mL废水。

In the thesis,different Si/（Al＋Fe） molar ratio of polysilicate aluminium ferric（PSAF） flocculant were produced by fly ash,industrial waste sulfuric acid and pyrite slag.The experimental results showed that： compared with the traditional method,polysilicate aluminium ferric flocculant＇s flocculation effect was better.COD and color removal rate can reach more than 78.62% and 83.56%.The best prepared condition of PSAF was determined that Si/（Fe＋Al）=1∶20,Fe/Al=1.The optimal conditions of wastewater treatment： pH=7 and dose=0.08 mL/200 mL wastewater.