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Predicting the potential of sludge dewatering liquors to recover nutrients as struvite biominerals

Environmental Science and Ecotechnology 2020年第3期3卷 50-59页

作者： Francisco Simoes Robert Colston Catarina Rosa-Fernandes Peter Vale Tom Stephenson Ana Soares Cranfield Water Science Institute Cranfield UniversityCranfieldMK430ALUK Technology and Development Severn Trent Water LtdAvon HouseSt.Martins RoadCoventryCV36PRUK

phosphorus and nutrient recovery from wastewater as mineral salts can support local replenishment of fertilisers and reduce mining,contributing to the circular *** and related streams are rich in nutrients,however;there is need to develop bio-based processes to recover *** study investigates the fractions of phosphorus(P)used by Brevibacterium antiquum to form struvite biominerals(bio-struvite)in wastewater sludge dewatering *** 72h of incubation,25.6 mg P/L were recovered as bio-struvite from 12.4 mg P/L organic plus condensed P and 13.2 mg P/L of *** potential of sludge dewatering liquors to recover nutrients as struvite was investigated by characterising ten types of sludge liquors(originating from primary,secondary sludge,feed to anaerobic digester and digestate,from 3 types of wastewater treatment plants)for their P fractions together with other parameters relevant for *** *** indicated that liquors obtained from primary sludge,feed to anaerobic digesters and digestate were the most suitable to produce biostruvite,as these were found to frequently have a high content of organic and condensed P,between to 276-732 mg P/***,from all the investigated sites,presented a higher potential for bio-struvite production than with conventional struvite *** study demonstrated that *** could convert organic and condensed P into bio-struvite,and this opens up a completely new way to recover forms of phosphorus that are not typically available for nutrient recovery in a single process.

关键词： Biomineralization Centrate Sidestream P-recovery acid-hydrolysable phosphorus

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