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Struvite Recovery from Digested Sewage Sludge

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Phosphorus Recovery and Recycling

Abstract

Struvite recovery is an ideal way to simultaneously recover phosphate (Pi) and ammonia from digested sludge. A full-scale plant to recover struvite directly from digested sludge was implemented at Higashinada Wastewater Treatment Plant (WWTP) having the sewage treatment capacity of 241,500 m3/day in Kobe City. The struvite recovery plant has a capacity of treating digested sludge of 239 m3/day, which is equivalent to a quarter of digested sludge generated at the WWTP. On average, it can recover approximately 40 and 90% of total P and soluble Pi, respectively, from digested sludge. The struvite recovery could reduce the volume of dewatered sludge by 3.3% on average and prevent struvite-scaling problems in the sludge treatment process. Recovered struvite has been registered as a chemical fertilizer and distributed to the Kobe area through fertilizer companies.

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References

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Author information

Authors and Affiliations

  1. Engineering and Development Division, Swing Corporation, Tokyo, Japan

    Daisuke Koga

Authors
  1. Daisuke Koga
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Correspondence to Daisuke Koga .

Editor information

Editors and Affiliations

  1. Phosphorus Atlas Research Institute, Waseda University, Shinjuku-ku, Tokyo, Japan

    Hisao Ohtake

  2. Phosphorus Atlas Research Institute, Waseda University, Shinjuku-ku, Tokyo, Japan

    Satoshi Tsuneda

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Koga, D. (2019). Struvite Recovery from Digested Sewage Sludge. In: Ohtake, H., Tsuneda, S. (eds) Phosphorus Recovery and Recycling . Springer, Singapore. https://doi.org/10.1007/978-981-10-8031-9_17

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