caa a22 4500 463171187 CHVBK 20180406164813.0 cr unu---uuuuu 170326e20070301xx s 000 0 eng 10.1007/s10163-006-0169-2 doi (NATIONALLICENCE)springer-10.1007/s10163-006-0169-2 Resource recovery treatment of waste sludge using a solubilizing reagent [Elektronische Daten] [Toshiyuki Nomura, Shunsuke Araki, Takanori Nagao, Yasuhiro Konishi] The dewatering of waste sludge continues to be a major problem in wastewater treatment. In this study, the solubilization treatment of waste sludge and extracellular polymeric substances using a solubilizing reagent was examined experimentally. For this purpose, a compression test of thickened waste sludge obtained after solubilization treatment was carried out. The total solid content of the dewatered cake was over 30% when using hydrochloric acid or acetic acid as the solubilizing reagent; however, it was about 20% when using sodium hydroxide. The thickened waste sludge was effectively solubilized when the concentration of acetic acid in the sludge, assuming that it was diluted by free water and not bound water in the sludge, was greater than 0.3 kmol/m3. A flocculated sedimentation test using the supernatant water after solubilization treatment was also carried out, revealing that it functions in a similar manner to commercial flocculant in aggregating solid particles under gravity. This result indicates that the supernatant water can act as a bioflocculant. Methane fermentation of the supernatant water was subsequently carried out. The findings showed that by using acetic acid as a solubilizing reagent, solubilized organic substances in the supernatant water could be recovered as a bioenergy resource. Springer-Verlag Tokyo, 2007 Waste sludge nationallicence Solubilization nationallicence Total solid nationallicence Bioflocculant nationallicence Bioenergy nationallicence Nomura Toshiyuki Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, 599-8531, Osaka, Japan aut Araki Shunsuke Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, 599-8531, Osaka, Japan aut Nagao Takanori Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, 599-8531, Osaka, Japan aut Konishi Yasuhiro Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, 599-8531, Osaka, Japan aut Journal of Material Cycles and Waste Management Springer-Verlag 9/1(2007-03-01), 34-39 1438-4957 9:1<34 2007 9 10163 https://doi.org/10.1007/s10163-006-0169-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10163-006-0169-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nomura Toshiyuki Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, 599-8531, Osaka, Japan aut NATIONALLICENCE 700 1- Araki Shunsuke Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, 599-8531, Osaka, Japan aut NATIONALLICENCE 700 1- Nagao Takanori Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, 599-8531, Osaka, Japan aut NATIONALLICENCE 700 1- Konishi Yasuhiro Department of Chemical Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, 599-8531, Osaka, Japan aut NATIONALLICENCE 773 0- Journal of Material Cycles and Waste Management Springer-Verlag 9/1(2007-03-01), 34-39 1438-4957 9:1<34 2007 9 10163 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer