超声破解剩余污泥的研究及剩余污泥破解三阶段论
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摘要
考察超声频率20kHz,超声功率320W,超声脉冲比3:1的超声破解剩余污泥50min的过程,检测污泥破解前后溶解性化学需氧量、核酸、蛋白质、肽聚糖和粒径等指标,观测其透射电镜图,得出超声1-7min主要破解污泥絮体结构,7min后主要破解污泥中微生物细胞;15-20min时能量利用率较大,40min后能耗使用效率不高。提出且明确剩余污泥破解分为"絮体破解→细胞壁破解→促细胞质流出"三个阶段,第一阶段为污泥絮体破解成微絮体和细菌个体;第二阶段为微絮体破解成基本粒子,微絮体中细菌个体的细胞壁被破解;第三阶段为破损的细胞壁被粉碎,胞内细胞质流出、破解物被分散。
引文
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[18]顾夏生,胡洪营,文湘华等.水处理生物学[M].北京:中国建筑工业出版社,2006:2-3.