A simple method to release polyphosphate from activated sludge for phosphorus reuse and recycling

Biotechnology and Bioengineering
A KurodaH Ohtake

Abstract

In enhanced biological phosphorus removal processes, activated sludge microorganisms accumulate large quantities of polyphosphate (polyP). It was discovered that nearly all of the polyP could be released from activated sludge simply by heating it at 70 degrees C for about 1 h. The chain length of released polyP ranged from 100 to 200 phosphate (P(i)) residues. The addition of CaCl(2) precipitated approximately 75% of the total phosphorus without pH adjustment. The formed precipitate contained more P and less Ca than typical natural phosphorite deposits. Hence, in combination with enhanced biological phosphorus removal, the present method has potential for the development of a simple process for recovering phosphorus in a reusable form from wastewater.

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Citations

Jul 8, 2008·Applied Microbiology and Biotechnology·Takashi WatanabeHaruyuki Iefuji
Oct 20, 2005·Journal of Bioscience and Bioengineering·Noboru TakiguchiHisao Ohtake
Sep 2, 2005·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Ping Huang LiaoKwang Victor Lo
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Oct 20, 2005·Journal of Bioscience and Bioengineering·Tomohiro MorohoshiAkio Kuroda
Apr 10, 2010·Bioscience, Biotechnology, and Biochemistry·Hitoshi KashiharaHisao Ohtake
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Dec 4, 2015·Environmental Science & Technology·Rixiang Huang, Yuanzhi Tang
Jun 12, 2013·Bioresource Technology·Hai-Ling ZhangHan-Qing Yu
Aug 6, 2016·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Asha SrinivasanKwang V Lo
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Jul 2, 2020·ACS Central Science·Michael B Geeson, Christopher C Cummins
Feb 11, 2020·Analytical Chemistry·Jonas Johannes ChristLars M Blank

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