caa a22 4500 46317139X CHVBK 20180406164814.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10163-007-0173-1 doi (NATIONALLICENCE)springer-10.1007/s10163-007-0173-1 Recovery of coagulant from water supply plant sludge and its effect on clarification [Elektronische Daten] [Seiichi Ishikawa, Naoko Ueda, Yuji Okumura, Yoshikazu Iida, Kenzo Baba] Spent coagulant in water supply plant sludge was extracted with H2SO4 and the efficiency of the reused coagulant was studied. The optimum pH values for coagulant extraction and clarification with the reused coagulant were 3.0-4.0 and about 6, respectively. In treating raw influent obtained from a sewage treatment plant and wastewater from a coastal landfill site, the removal of chemical oxygen demand (COD), total nitrogen, and total phosphorous with the recovered coagulant was higher than that with commercial aluminum sulfate or polyaluminum chloride. In addition, the sludge settling properties, the extra sludge mass formation, the supernatant quality, and the cost of reagents were also studied. The coagulant recovered from water supply plant sludge by H2SO4 extraction could be successfully reused for the clarification of domestic and food industry wastewaters. Springer-Verlag Tokyo, 2007 Water supply plant sludge nationallicence Recovery and reuse of coagulant nationallicence Clarification nationallicence COD nationallicence Nutrients nationallicence Ishikawa Seiichi Graduate School of Environmental Engineering, University of Kitakyushu, 1-2-1 Shin-ike, Tobata-ku, 804-0082, Kitakyushu, Japan aut Ueda Naoko Graduate School of Environmental Engineering, University of Kitakyushu, 1-2-1 Shin-ike, Tobata-ku, 804-0082, Kitakyushu, Japan aut Okumura Yuji Kitakyushu City Institute of Environmental Sciences, Kitakyushu, Japan aut Iida Yoshikazu Kitakyushu City Institute of Environmental Sciences, Kitakyushu, Japan aut Baba Kenzo Waterworks Bureau, Kitakyushu City, Kitakyushu, Japan aut Journal of Material Cycles and Waste Management Springer-Verlag 9/2(2007-09-01), 167-172 1438-4957 9:2<167 2007 9 10163 https://doi.org/10.1007/s10163-007-0173-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10163-007-0173-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ishikawa Seiichi Graduate School of Environmental Engineering, University of Kitakyushu, 1-2-1 Shin-ike, Tobata-ku, 804-0082, Kitakyushu, Japan aut NATIONALLICENCE 700 1- Ueda Naoko Graduate School of Environmental Engineering, University of Kitakyushu, 1-2-1 Shin-ike, Tobata-ku, 804-0082, Kitakyushu, Japan aut NATIONALLICENCE 700 1- Okumura Yuji Kitakyushu City Institute of Environmental Sciences, Kitakyushu, Japan aut NATIONALLICENCE 700 1- Iida Yoshikazu Kitakyushu City Institute of Environmental Sciences, Kitakyushu, Japan aut NATIONALLICENCE 700 1- Baba Kenzo Waterworks Bureau, Kitakyushu City, Kitakyushu, Japan aut NATIONALLICENCE 773 0- Journal of Material Cycles and Waste Management Springer-Verlag 9/2(2007-09-01), 167-172 1438-4957 9:2<167 2007 9 10163 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer