聚乙烯醇包埋厌氧活性污泥处理废水的最优化条件研究

研究以聚乙醇为主要包埋材料的混合载体法固定厌氧活性污泥处理有机废水的最优化条件。混合载体由聚乙烯醇（ＰＶＡ）、０．１５％海藻酸钠，２％Ｆｅ粉，０．３％ＣａＣＯ３，４％ＳｉＯ２粉末组成，结果表明，ＰＶＡ８％，初始污泥浓度１５％时最适宜，凝固凝饱和硼ＰＨ对包埋效果有影响，用Ｎａ２ＣＯ３调节硼酸ＰＨ至６．７可使包埋颗粒强度及产ＣＨ４活性提高，混合载体法有效地解决了固定化细胞技术应用于废水处理所面临的成球

Study on the Optimized Conditions for Entrapping Anaerobic Activated Sludge in PVA

The optimized conditions under which anaerobic activated sludge was immobilized with a mixed carrier process using polyvinyl alcohol (PVA ) as major entrapping material were studied. The mixed carrier consisted of PVA, 0. 15% sodium alginated,2 % Fe (iron powder), 0. 3 % CaCO_3,and 4 % silica gel. It was found that the optimum conditions were the concentration of 8% PVA and the initial concentration of 20% sludge. The pH value of boric acid solution had an effect on the immobilization and the use of sodium carbonate as pH adjusting agent allowed the boric acid in gel solution to have a pH of 6. 7 which increased the strength of immobile phase and its activity of producing methane. This mixed carrier process effectively solved the problems that the immobilized cell technology applied in wastewater treatment faced, such as difficulty in forming spherical particles,ease of the particles to be broken, loss of the activity in producing methane,and floatation of the particles upon preducing methane.