Effects of thermal treatments on five different waste activated sludge samples solubilisation, physical properties and anaerobic digestion
Effects of thermal treatments on five different waste activated sludge samples solubilisation, physical properties and anaerobic digestion
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DOI：
10.1016/j.cej.2007.07.099
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发表时间：
2008-06-01
影响因子：
15.1
通讯作者：
Carrere, Helene
中科院分区：
文献类型：
--
作者：
Bougrier, Claire;Delgenes, Jean Philippe;Carrere, Helene
为了解决剩余污泥的管理问题，污泥热预处理厌氧消化技术受到了广泛关注。如果大多数工厂都同意最佳处理温度（160-180摄氏度），则热预处理在沼气生产方面的结果非常分散。为了分析污泥样品的影响，对五种不同的废弃活性污泥样品进行了热预处理。对于低于200摄氏度的温度，COD溶解被发现与处理温度线性增加，所有不同的污泥样品表现在相同的方式。对于低于150 ° C的温度，碳水化合物溶解比蛋白质溶解更重要。对预处理后污泥的表观粘度、沉降性和脱水性（CST）进行了分析，指出了150 ℃的阈值温度。高达190摄氏度的热处理允许在污泥的分批厌氧消化过程中增加沼气产量。沼气体积增强与污泥COD溶解和未经处理的污泥的初始生物降解性：较低的初始生物降解性，较高的是热处理的影响。(C)2007 Elsevier B. V.保留所有权利。
In order to face excess waste activated sludge management problems, sludge anaerobic digestion with thermal pre-treatment is of great interest. If most of works agree on the optimal treatment temperature (160-180 degrees C), results of thermal pre-treatments in terms of biogas production are very dispersed. With the aim of analysing the impact of sludge samples, thermal pre-treatments were carried on five different waste activated sludge samples. For temperatures lower than 200 degrees C, COD solubilisation was found to increase linearly with treatment temperature and all the different sludge samples behaved in the same way. For temperatures lower than 150 degrees C, carbohydrates solubilisation was more important than proteins solubilisation. Analyses of sludge apparent viscosity, settleabilty and dewaterability (CST) of pre-treated sludge pointed out a threshold temperature of 150 degrees C. Thermal treatments up to 190 degrees C allowed the biogas production to increase during batch anaerobic digestion of sludge. Biogas volume enhancement was linked to sludge COD solubilisation and to untreated sludge initial biodegradability: the lower the initial biodegradability, the higher is the impact of thermal treatment. (C) 2007 Elsevier B.V. All rights reserved.