Ultrasound coupled with Fenton oxidation pre-treatment of sludge to release organic carbon, nitrogen and phosphorus.
Ultrasound coupled with Fenton oxidation pre-treatment of sludge to release organic carbon, nitrogen and phosphorus.
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DOI：
10.1016/j.scitotenv.2015.05.131
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发表时间：
2015-11
期刊：
影响因子：
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通讯作者：
Changxiu Gong;Jianguo Jiang;De’an Li
中科院分区：
文献类型：
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作者：
Changxiu Gong;Jianguo Jiang;De’an Li
我们重点研究了超声耦合芬顿氧化（U+F）预处理过程中超声波和芬顿试剂对污水处理厂污泥解体的影响。结果表明，U+F处理可以显着提高污泥上清液中可溶性COD、TOC、总氮、蛋白质、总磷和PO43的浓度。该方法比单独使用超声波（U）或芬顿氧化（F）处理更有效。与单独使用 U 和 F 相比，U + F 处理使可溶性 COD 分别增加 2.1 倍和 1.4 倍。与单独使用 F 相比，U + F 处理使总 N 和 P 分别增加了 1.7 倍和 2.2 倍。根据扫描电子显微镜观察，经 U + F 处理后，污泥显示出明显更细的粒径和更疏松的微观结构，并且最高 OH 自由基点信号强度从 F 处理的 568.7 增加到电子自旋共振的 1106.3。这表明U+F处理能更好地诱导污泥分解和有机碳、氮和磷的释放。
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 PO43 −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 OHradical dot 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.