Comprehensive Evaluation of a Sewage Treatment Plant as a Base for Recirculation of Materials and Energy in the Region

  • T. Fukushima
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 4)


Based on the concept that a sewage treatment plant should serve as a base for the circulation of materials and energy in a region, a combined electric power generation system using both digestion gas and sludge incineration for power generation was studied in the use of organics in influent. To function as a base for the circulation of materials, the plant was assumed to employ phosphorus recovery, which was estimated individually for an ash alkali process and a MAP process. Using a model treatment plant with a capacity of 48,000 m3/day, it was found that introducing high-efficiency solid-liquid separation to recover solid organics proved effective in increasing the electric-power self-supply ratio attained in normal power generation. With digestion gas this ratio was raised from 6.2% to 13.0%, and with combined power generation, the ratio was raised three times higher to 18.6%. Phosphorus recovery was increased by 10% to 30% over the conventional process in an ash alkali process by introducing an AO process using the transfer of phosphorus to sludge as part of the wastewater treatment process. When various measures are evaluated in terms of water eco-efficiency from a viewpoint of environmental performance in the sewage treatment plants, power generation using sludge incineration was 1.96 kg/kWh, compared to the benchmark, which was 1.62 kg/kWh of power generation with digestion gas, and phosphorus recovery was 2.08 kg/kWh. The target for water eco-efficiency may be set to 3 kg/kW/h when various measures are combined.


Power self-supply ratio Phosphorus recovery Water eco-efficiency 


  1. Chen J (2014) Improving China’s wastewater treatment with new concept, Water21, 53–54, AugustGoogle Scholar
  2. Cornel P, Choo KH, Lazarova V (2012) Water-energy interactions in water reuse. IWA Publishing, LondonGoogle Scholar
  3. Fukushima T (2015) The basic study on the energy potential flow analysis of a sewage treatment plant. Mod Environ Sci Eng 1(2):72–78CrossRefGoogle Scholar
  4. Ishida S, Hanaki K, Aramaki T (2005) Introduction of tradable permit system among sewage treatment plants in tokyo bay watershed and its effect. J Jan Soc Civ Eng 804(VII-37):804_73–804_81 (in Japanese)Google Scholar
  5. Japan Ministry of Land, Infrastructure, Transport and Tourism (2010) Guide of the phosphorus exploitation of resources in the sewerage (in Japanese)Google Scholar
  6. Miyata A, Matsui Y, Yamashita H, Shimada M (2015) Energy management system utilizing intensive solid liquid separation, Water and Energy 2015Google Scholar
  7. Moriya Y, Yanase T, Yoshimura H, Tajima A (2015) Saving and generation in an innovative sewage sludge incineration system, Water and Energy 2015Google Scholar
  8. Olsson G (2012) Water and energy threats and opportunities. IWA Publishing, LondonGoogle Scholar
  9. Veratrate W, Caveye PV, Diamantis V (2009) Maximum use of resources present in domestic “used water”. Bioresour Technol 100:5537–5545CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG 2017

Authors and Affiliations

  • T. Fukushima
    • 1
  1. 1.METAWATER Co., Ltd.Chiyoda-kuJapan

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