Reclaimed phosphorus commodity reserve from water resource recovery facilities—A strategic regional concept towards phosphorus recovery

Law, Kam P.; Pagilla, Krishna

doi:10.1016/j.resconrec.2019.104429

Cited by 32 publications

(15 citation statements)

References 34 publications

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“…The AF residues also contained a certain amount of valuable minerals such as vivianite Fe3(PO4)2 • 8H2O and struvite NH4MgPO4 • 6H2O. Vivianite and struvite precipitations are both regarded as highly efficient methods for the recovery of phosphorus originated from sludge (Law et al, 2019;Munir et al, 2017;Uysal et al, 2010;. Therefore, the AF residue has the potential to be utilized as an agricultural fertilizer, and further techniques should be developed in order to reclaim such minerals.…”

Section: Xrd Analysismentioning

confidence: 99%

Migration and transformation mechanism of phosphorus in waste activated sludge during anaerobic fermentation and hydrothermal conversion

Shi

Chen²,

Cao³

et al. 2021

Journal of Hazardous Materials

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This study investigated migration and transformation mechanism of P in waste activated sludge (WAS) during anaerobic fermentation (AF) process and the subsequent hydrothermal conversion (HTC) process. Control of pH during the AF processes was found to be significant, whereby the use of acidic (pH = 5.5) or alkaline conditions (pH = 9.5) facilitated the release of either apatite phosphorus (AP) or non-apatite inorganic phosphorus (NAIP) and organic phosphorus, respectively. At the same pH of 9.5, NaOH promoted the transfer of P into liquid phase, and P in the solid phase was mainly in the form of NAIP. In contrast, Ca(OH)2 enhanced the incorporation of P into the solid products, with the P mainly in the form of AP. The subsequent HTC process promoted the NAIP transferred to AP, and the bioavailability of P in the HTC solid products was decreased. The P K-edge X-ray absorption near edge structure analysis provided detailed information about the phosphates. It demonstrated that the conversion of Ca8H2PO4•6.5H2O to Ca5(PO4)3•OH was facilitated by HTC under the alkaline condition. This study sheds lights on transformation mechanism of P speciations during AF and HTC processes, which would provide fundamental information for effective utilization of P in bio-wastes.

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Section: Xrd Analysismentioning

confidence: 99%

Migration and transformation mechanism of phosphorus in waste activated sludge during anaerobic fermentation and hydrothermal conversion

Shi

Chen²,

Cao³

et al. 2021

Journal of Hazardous Materials

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“…Ca-P precipitation is a more effective method for removing P, as the chemicals used in Ca-P recovery are more accessible than those for struvite precipitation. Furthermore, Ca-P precipitation forms hydroxyapatite, which lends itself to a wider range of uses than struvite (Law & Pagilla, 2019). The implementation of any of these various management techniques is further complicated by the fact that utilizing phosphate rock and existing phosphate-based fertilizers has become increasingly cheaper relative to recovering P from WRRFs (Law & Pagilla, 2018).…”

Section: Resource Recoverymentioning

confidence: 99%

Pathways to Water Sector Decarbonization, Carbon Capture and Utilization

2022

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The water sector is in the middle of a paradigm shift from focusing on treatment and meeting discharge permit limits to integrated operation that also enables a circular water economy via water reuse, resource recovery, and system level planning and operation. While the sector has gone through different stages of such revolution, from improving energy efficiency to recovering renewable energy and resources, when it comes to the next step of achieving carbon neutrality or negative emission, it falls behind other infrastructure sectors such as energy and transportation. The water sector carries tremendous potential to decarbonize, from technological advancements, to operational optimization, to policy and behavioural changes. This book aims to fill an important gap for different stakeholders to gain knowledge and skills in this area and equip the water community to further decarbonize the industry and build a carbon-free society and economy. The book goes beyond technology overviews, rather it aims to provide a system level blueprint for decarbonization. It can be a reference book and textbook for graduate students, researchers, practitioners, consultants and policy makers, and it will provide practical guidance for stakeholders to analyse and implement decarbonization measures in their professions. ISBN: 9781789061789 (Paperback) ISBN: 9781789061796 (eBook) ISBN: 9781789061802 (ePUB)

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“…2 Unlike carbon and nitrogen, P does not exist in the gaseous form, and it cannot be manufactured artificially. 3 The main source of phosphorus is phosphate rock, a non-renewable resource, which is estimated to be exhausted in 50–100 years. 4,5 Furthermore, agro-industrial wastewater usually has the characteristics of high phosphate content.…”

Section: Introductionmentioning

confidence: 99%

Efficient capture of phosphate from wastewater by a recyclable ionic liquid functionalized polyacrylonitrile fiber: a typical “release and catch” mechanism

Zheng

et al. 2022

Environ. Sci.: Water Res. Technol.

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Reclaimed phosphorus commodity reserve from water resource recovery facilities—A strategic regional concept towards phosphorus recovery

Cited by 32 publications

References 34 publications

Migration and transformation mechanism of phosphorus in waste activated sludge during anaerobic fermentation and hydrothermal conversion

Migration and transformation mechanism of phosphorus in waste activated sludge during anaerobic fermentation and hydrothermal conversion

Pathways to Water Sector Decarbonization, Carbon Capture and Utilization

Efficient capture of phosphate from wastewater by a recyclable ionic liquid functionalized polyacrylonitrile fiber: a typical “release and catch” mechanism

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