Trzcinski Antoine Prandota, Tian Xinbo, Wang Chong, Lin Li Leonard, Ng Wun Jern
a Advanced Environmental Biotechnology Centre (AEBC), Nanyang Environment and Water Research Institute (NEWRI) , Nanyang Technological University , Singapore.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2015;50(2):213-23. doi: 10.1080/10934529.2014.975561.
This article focuses on the combination of ultrasonic and thermal treatment of sewage sludge (SS). The combination involved ultrasonicating a fraction of the sludge and thermal treatment at various temperatures and this resulted in solubilization of proteins and carbohydrates, and so contributing to increased COD solubilization. During the treatment, SCOD, soluble proteins and carbohydrates increased from 760 mg L(-1) to 10,200 mg L(-1), 110 mg L(-1) to 2,900 mg L(-1) and 60 mg L(-1) to 630 mg L(-1), respectively. It was found ultrasonication of only a fraction of the sludge (>20%) followed by thermal treatment led to significant improvement compared to thermal and ULS treatments applied on their own. At 65°C, the kinetic of solubilization was improved and the hyper-thermophilic treatment time could be reduced to a few hours when ultrasonication was used first. A linear correlation (R(2) = 95%) was found between the SCOD obtained after ultrasonication pre-treatment and anaerobic biodegradability. The combined treatment resulted in 20% increase in biogas production during the anaerobic digestion of the pre-treated sludge.
本文聚焦于污水污泥（SS）的超声与热处理联合处理。该联合处理包括对部分污泥进行超声处理以及在不同温度下进行热处理，这导致蛋白质和碳水化合物溶解，从而使化学需氧量（COD）的溶解量增加。在处理过程中，溶解性化学需氧量（SCOD）、可溶性蛋白质和碳水化合物分别从760毫克/升增至10200毫克/升、从110毫克/升增至2900毫克/升、从60毫克/升增至630毫克/升。研究发现，仅对部分污泥（>20%）进行超声处理后再进行热处理，与单独进行热处理和超声处理相比，有显著改善。在65°C时，若先使用超声处理，溶解动力学得到改善，超嗜热菌处理时间可缩短至数小时。超声预处理后获得的SCOD与厌氧生物降解性之间存在线性相关性（R² = 95%）。联合处理使预处理污泥厌氧消化过程中的沼气产量增加了20%。
