聚乙烯醇包埋厌氧活性污泥处理废水的最优化条件研究  

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

作　　者：闵航[1] 郑耀通[1] 钱泽澍 陈美慈[1] 

机构地区：[1]浙江农业大学环保系

出　　处：《环境科学》1994年第5期10-14,共5页Environmental Science

基　　金：八五攻关课题

摘　　要：研究以聚乙烯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。凝固液饱和硼酸的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难、易破碎，活性丧失大及因产气而发胀上浮等问题。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.

关 键 词：聚乙烯醇 厌氧活性污泥 废水处理 最佳化 

分 类 号：X703[环境科学与工程—环境工程]