School of Environment, Tsinghua University, Beijing 100084, China.
School of Environment, Tsinghua University, Beijing 100084, China; Key Laboratory for Solid Waste Management and Environment Safety, Ministry of Education of China, China; Collaborative Innovation Center for Regional Environmental Quality, Tsinghua University, Beijing, China.
Sci Total Environ. 2015 Nov 1;532:495-500. doi: 10.1016/j.scitotenv.2015.05.131. Epub 2015 Jun 19.
We focused on the effects of ultrasound and Fenton reagent in ultrasonic coupling Fenton oxidation (U + F) pre-treatment processes on the disintegration of wastewater treatment plant sludge. The results demonstrated that U + F treatment could significantly increase soluble COD, TOC, total N, proteins, total P and PO4(3-) concentrations in sludge supernatant. This method was more effective than ultrasonic (U) or Fenton oxidation (F) treatment alone. U + F treatment increased the soluble COD by 2.1- and 1.4-fold compared with U and F alone, respectively. U + F treatment increased the total N and P by 1.7- and 2.2-fold, respectively, compared with F alone. After U + F treatment, sludge showed a considerably finer particle size and looser microstructure based on scanning electron microscopy, and the highest OH signal intensity increased from 568.7 by F treatment to 1106.3 using electron spin resonance. This demonstrated that U+F treatment induces disintegration of sludge and release of organic carbon, nitrogen and phosphorus better.
我们关注了超声和芬顿试剂在超声耦合芬顿氧化（U+F）预处理过程中对污水处理厂污泥解体的影响。结果表明，U+F 处理可显著增加污泥上清液中溶解性 COD、TOC、总氮、蛋白质、总磷和 PO4(3-)的浓度。这种方法比单独的超声（U）或芬顿氧化（F）处理更有效。与单独的 U 或 F 相比，U+F 处理分别将溶解性 COD 提高了 2.1 倍和 1.4 倍。与单独的 F 相比，U+F 处理分别将总氮和磷提高了 1.7 倍和 2.2 倍。扫描电子显微镜显示，经过 U+F 处理后，污泥的粒径明显变小，微观结构变松，用电子顺磁共振检测到的 OH 信号强度最高从 F 处理的 568.7 增加到 1106.3。这表明 U+F 处理能更好地诱导污泥解体和释放有机碳、氮和磷。
