基于超声的联合污泥溶胞技术研究进展

Progress Research of Sludge Lysis Technology Based on Ultrasound

针对单独超声污泥溶胞技术能耗较大、溶胞时间较长等问题,许多学者对基于超声的联合污泥溶胞技术进行探索。对目前研究较多的臭氧、过氧化氢、碱和高铁酸盐等5种与超声联用的污泥溶胞技术的研究现状进行总结。对污泥溶胞的SCOD溶出率、作用机制、运行条件和成本进行对比和分析发现,超声-碱联合污泥溶胞体系中SCOD的溶出最多,但溶出液中有机物可生化性较差。所有超声与氧化剂联用的污泥溶胞技术均可改善污泥溶胞后上清液的可生化性,降低超声能量,缩短反应时间,但溶出SCOD总量有所下降。其中高铁酸盐与超声联用可以溶出较多的SCOD,是一种前景较好的污泥溶胞技术。建议对污泥溶胞系统进行全生命周期评价并对协同作用的机理做更深入的分析。

In view of the large energy consumption and long lysis time of the ultrasonic sludge lysis technology,many scholars have explored the combined sludge lysis technology based on ultrasound.This paper summarizes the sludge lysis technology that has been more studied in combination ultrasound with ozone,hydrogen peroxide,alkali,and lysozyme.The comparison and analysis of the SCOD dissolution rate,mechanism of action,operating conditions and cost of sludge lysis showed that the SCOD dissolution in the ultrasonic-alkali combined sludge lysis system was the most,but the organic matter in the dissolution liquid had poor biodegradability.All sludge lysis technologies combined with ultrasound and oxidants can improve the biodegradability of the supernatant after sludge lysis,reduce the ultrasound energy,and shorten the reaction time,but the total amount of dissolved SCOD is reduced.Among them,the combination of ferrate and ultrasound can dissolve more SCOD,which is a promising sludge lysis technology.It is recommended to evaluate the whole life cycle assessment of the sludge lysis system and do a more in-depth analysis of the mechanism of synergy.