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） 活性汚泥の圧搾による高度脱水における可逆凝集と超高圧の複合効果
著者 入谷英司; 片桐誠之; 鷲津拓也; 黄國楨; 鄭東文
單位
出版者
著錄名稱、卷期、頁數 Kagaku Kogaku Ronbunshu 40(5), p.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 en
ISSN 1349-9203
期刊性質 國外
收錄於 SCI EI
產學合作
通訊作者 入谷英司
審稿制度 是
國別 JPN
公開徵稿
出版型式 ,電子版
相關連結

機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/107916 )