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標題:Combined effect of reversible flocculation and ultrahigh pressure in high-level deliquoring attained by expression of activated sludge
學年103
學期1
出版(發表)日期2014/09/01
作品名稱Combined effect of reversible flocculation and ultrahigh pressure in high-level deliquoring attained by expression of activated sludge
作品名稱(其他語言)
著者E. Iritani; N. Katagiri; T. Washizu; K.J. Hwang=黃國楨; T.W. Cheng
單位化學工程與材料工程學系暨研究所
出版者Society of Chemical Engineering of Japan
著錄名稱、卷期、頁數Kagaku Kogaku Ronbunshu 40(5), pp.396-403
摘要High-level deliquoring of excess municipal activated sludge was accomplished by use of an inorganic flocculant, polyaluminum chloride (PACl), and an organic polymer flocculant, Kurifix. The deliquoring process consisted of filtration of flocculated sludge followed by ultrahigh-pressure expression combined with water permeation through the filter cake, resulting in the re-distribution of flocs in the filter cake. Whereas the use of Kurifix increased the filtration rate significantly more than PACl, it decreased the expression rate, particularly at low expression pressure. As the expression pressure increased, the cake moisture content decreased more remarkably in the case of PACl compared with Kurifix. Of particular interest is that an ultrahigh pressure of 50 MPa decreased the cake moisture content to 23.7 wt% at the end of expression. The kinetics of ultrahigh-pressure expression such as the variations with time of the average consolidation ratio and average cake moisture content was well elucidated by considering a Terzaghi type of primary consolidation followed by a mainly two-stage creep phenomenon. Consequently, the creep effect was marked in the case of Kurifix, particularly at low expression pressure. Moreover, the modified consolidation coefficient increased with the expression pressure and remained constant above a critical expression pressure, which depended on the flocculant: ca. 5 MPa for PACl and ca. 10 MPa for Kurifix.
關鍵字Ultrahigh-Pressure Expression;Reversible Flocculation;Deliquoring;Activated Sludge;Cake Moisture Content
語言英文
ISSN1349-9203
期刊性質國外
收錄於SCI;EI;
產學合作
通訊作者E. Iritani
審稿制度
國別日本
公開徵稿
出版型式,電子版,紙本
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