Development of a process for the recovery of phosphorus resource from digested sludge by crystallization technology

Kazuaki Shimamura, Hideyuki Ishikawa, Asei Mizuoka, Izumi Hirasawa

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    Removal and recovery of phosphorus from sewage in form of MAP (magnesium ammonium phosphate) have attracted attention from the viewpoint of eutrophication prevention and phosphorus resource recovery as well as scaling prevention inside digestion tanks. In this work, phosphorus recovery demonstration tests were conducted in a 50 m3/d facility having a complete mixing type reactor and a liquid cyclone. Digested sludge, having 690 mg/L T-P and 268 mg/L PO4-P, was used as test material. The T-P and PO4-P of treated sludge were 464 mg/L and 20 mg/L achieving a T-P recovery efficiency of 33% and a PO4-P crystallization ratio of 93%. The reacted phosphorus did not become fine crystals and the recovered MAP particles were found to be valuable as a fertilizer. A case study in applying this phosphorus recovery process for treatment of sludge from an anaerobic-aerobic process of a 21,000m3/d sewage system, showed that 30% of phosphorus concentration can be reduced in the final effluent, recovering 315kg/d as MAP.

    Original languageEnglish
    Pages (from-to)451-456
    Number of pages6
    JournalWater Science and Technology
    Volume57
    Issue number3
    DOIs
    Publication statusPublished - 2008

    Fingerprint

    Phosphorus
    crystallization
    Crystallization
    phosphorus
    Recovery
    resource
    Magnesium
    magnesium
    Phosphates
    ammonium
    phosphate
    Sewage
    sewage
    sludge
    Eutrophication
    Fertilizers
    cyclone
    digested sludge
    eutrophication
    digestion

    Keywords

    • Crystallization
    • Digested sludge
    • Liquid cyclone
    • MAP
    • Phosphorus recovery

    ASJC Scopus subject areas

    • Water Science and Technology

    Cite this

    Development of a process for the recovery of phosphorus resource from digested sludge by crystallization technology. / Shimamura, Kazuaki; Ishikawa, Hideyuki; Mizuoka, Asei; Hirasawa, Izumi.

    In: Water Science and Technology, Vol. 57, No. 3, 2008, p. 451-456.

    Research output: Contribution to journalArticle

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