Significances of deflocculated sludge flocs as well as extracellular polymeric substances in influencing the compression dewatering of chemically acidified sludge

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• 作者：Yi Lu^a ; Guanyu Zheng^a ; ^b ; ^{gyzheng@njau.edu.cn} ; Wenzhu Wu^c ; Chunhong Cui^a ; Lixiang Zhou^a ; ^b
• 关键词：Municipal sewage sludge ; Acidification ; Sludge dewatering ; Deflocculated sludge flocs ; Extracellular polymeric substances
• 刊名：Separation and Purification Technology
• 出版年：2017
• 出版时间：4 April 2017
• 年：2017
• 卷：176
• 期：Complete
• 页码：243-251
• 全文大小：806 K
• 卷排序：176

文摘

Chemical acidification of sludge reduced the moisture content in dewatered sludge by 13.5%. Chemical acidification of sludge reduced the average removal rate of moisture of sludge by 44.1%. Increases of outer layer EPS and deflocculated flocs led to low dewatering rate of acidified sludge. Only 5 mg/g dry solid (DS) of PAA improved the dewatering rate of acidified sludge through re-flocculating its flocs. Chemical acidification and conditioning can enhance the compression dewatering of sludge.