Disintegration of municipal waste activated sludge by simultaneous combination of acid and ultrasonic pretreatment
Disintegration of municipal waste activated sludge by simultaneous combination of acid and ultrasonic pretreatment
复制标题
DOI：
10.1016/j.psep.2014.04.002
复制
发表时间：
2015-01-01
影响因子：
7.8
通讯作者：
Sahinkaya, Serkan
中科院分区：
文献类型：
--
作者：
Sahinkaya, Serkan
根据城市生活垃圾活性污泥的化学性质，研究了酸预处理和超声预处理对城市垃圾活性污泥的单独和联合作用。在酸-超声联合预处理法(超声波-酸预处理)中，降低pH值加速和增强了废弃生物污泥的崩解。因此，在较短的超声时间内，联合前处理可以获得相同的崩解效率(单独使用超声波处理)。超声波单独预处理的最佳工艺条件为：超声波功率密度为1.0W/m L，处理时间为10min；联合处理的最佳工艺条件为：超声波功率密度为1.0W/m L，处理时间为10min，初始污泥pH值为2.0。在此优化条件下，污泥崩解度分别为30%和40%左右。结果表明，组合预处理的最佳污泥浓度为总固体含量(TS)的1.0%。因此，超声-酸预处理已被确定为一种新的、有效的改善污泥崩解的组合污泥预处理方法。(C)2014年化学工程师学会。爱思唯尔出版，版权所有。
The individual and simultaneous effects of acid and ultrasonic pretreatment on the disintegration of municipal waste activated sludge (WAS) were investigated based on chemical properties of WAS. In the combination of acid and ultrasonic pretreatment methods (ultrasonic-acid pretreatment), lowering pH accelerated and enhanced the disintegration of waste biological sludge. Therefore, the same disintegration efficiency (obtained by ultrasonic pretreatment alone) was achieved by the combined pretreatment in shorter sonication times. Optimum pretreatment conditions were ultrasonic power density of 1.0 W/mL and pretreatment time of 10 min for ultrasonic pretreatment alone, and ultrasonic power density of 1.0 W/mL, pretreatment time of 10 min and initial sludge pH of 2.0 for the combined pretreatment. Sludge disintegration degrees were about 30% and 40% under these optimized conditions, respectively. Optimum sludge concentration was found to be 1.0% total solid (TS) content for the combined pretreatment. As a result, ultrasonic-acid pretreatment has been determined as a new and effective combined sludge pretreatment method to improve the sludge disintegration. (C) 2014 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.