Reducing Ammonia and Phosphorus Recycle Loads by Struvite Harvesting

Baur, Rob; Prasad, Ram; Britton, Ahren

doi:10.2175/193864708788809671

Cited by 7 publications

(6 citation statements)

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“…On the other side, phosphorus can be precipitated/crystallized as hydroxyl apatite via changing the pH conditions and chemical dosing in wastewater (Baur et al, 2008). However, this phenomenon could lead to clogging of the pipes if not properly controlled and can lead to economic loss.…”

Section: Biotechnological Approachesmentioning

confidence: 99%

Advanced Separation Processes for Recovery of Critical Raw Materials From Renewable and Waste Resources

Rameshkumar

Pednekar

Chandra

et al. 2020

Encyclopedia of Renewable and Sustainable Materials

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In the present world, raw materials are in greater demand but are becoming ever scarcer. To imply the sign of criticality, knowing that there is a high risk of supply shortage and economic impact, the European Commission formally adopted a list of specific raw materials designated as 'critical raw materials' (CRMs) as represented in Fig. 1. Regulatory policies are being implemented to bring down the extraction/mining trend for ultimately extending the lifetime of CRMs. On the other hand, advanced recycling systems are being practiced to promote and establish a core circular economy context by recycling, recovering, and separating CRMs. These recycling approaches are mostly aimed at the recovery of various metals such as palladium, gallium, germanium, copper, which are critical raw materials for the technology sector. There are also a specific group of CRMs including Phosphorus (P), natural phosphate rock and Magnesium (Mg) representing major primary, and secondary resources for industrial applications of high economic value (Loganathan et al., 2017; Yan et al., 2018). Crucially only P and Mg are deemed suitable candidate CRM's for recovery from waste streams through effective separation and recycling strategies. Further, its supply-demand status and substitutability risks have driven the requisites for resource supplementing technology through effective recovery and recycling strategies.

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Section: Biotechnological Approachesmentioning

confidence: 99%

Advanced Separation Processes for Recovery of Critical Raw Materials From Renewable and Waste Resources

Rameshkumar

Pednekar

Chandra

et al. 2020

Encyclopedia of Renewable and Sustainable Materials

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show abstract

“…This compares favorably to the performance documented in other studies (Doyle andParsons, 2002, Prasad, 2007). Other studies (Baur et al, 2008) indicate that even higher removals can be achieved, but for this study we held the model to predict the approximate 80-percent removal (by controlling the magnesium input).…”

Section: Figurementioning

confidence: 99%

“…As part of the evaluation process a number of treatment alternatives are considered to meet these future limitations. The use of intentional struvite precipitation to assist in the removal of total phosphorus has proved to be beneficial in meeting treatment goals (Baur et al, 2008, Prasad et al, 2007. It is warranted to compare the incorporation of intentional struvite precipitation with other treatment technologies to quantify the associated impacts at the treatment facility.…”

Section: Introductionmentioning

confidence: 99%

Incorporation of an Intentional Struvite Precipitation Model into a Whole-plant Process Simulator

Leaf¹,

Johnson²

2009

proc water environ fed

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An intentional struvite precipitation model is incorporated into a whole-plant process simulator allowing for the quantification of impacts to the overall mass balance and associated phosphorus recovery from a wastewater treatment system. The intentional struvite precipitation model predicts the overall struvite quantities generated (as magnesium ammonium phosphate, MgNH 4 PO 4 (H 2 O) 6 ) and the associated reduction of phosphorus and ammonia across the reactor. The results are incorporated into the overall wastewater treatment facility (WWTF) mass balance, quantifying the impact intentional struvite precipitation has on the nutrient removal performance of the facility. The use of this model in a whole-plant process simulator allows the direct comparison to other nutrient removal alternatives, providing a basis for the selection of the appropriate treatment process configuration.

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“…The struvite recovery centrate treatment process (Baur et al, 2008) is a controlled struvite crystallization process marketed by Ostara Nutrient Removal Technologies, Inc. (Ostara). It adds magnesium to the phosphorus and ammonia rich centrate to create fertilizer-size struvite pellets in an upflow fluidized bed reactor.…”

Section: Struvite Recovery Processmentioning

confidence: 99%

“…It adds magnesium to the phosphorus and ammonia rich centrate to create fertilizer-size struvite pellets in an upflow fluidized bed reactor. The Ostara process has been demonstrated at pilot scale to be capable of recovering an average of 95% of phosphate and 19% of ammonia from a centrate stream (Baur et al, 2008). The generated struvite product has a high demand in the marketplace due to its slow-release of nutrients.…”

Section: Struvite Recovery Processmentioning

confidence: 99%

EBPR with Struvite Recovery to Reduce Chemical Consumption and Increase Nutrient Removal Reliability

Kabouris¹,

Engelmann²,

Dulaney³

et al. 2009

proc water environ fed

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Two alternatives were investigated for reducing chemical addition at a water reclamation facility with regional anaerobic digestion recycle streams: 1. the MLE process with alum addition for P removal and denitrifying filters for N removal (MLE alternative), and 2. the 5-stage Bardenpho alternative process for enhanced biological phosphorus removal, activated sludge biological denitrification using methanol addition and the Ostara struvite-recovery recycles treatment process. The 5-stage Bardenpho alternative resulted in annual cost operational savings of $640,000-$800,000 compared to MLE alternative, a 13-to 18-year payback period, reduced chemical and electrical energy consumption, and increased net digester methane gas production. Process performance would significantly increase: the 14 percent reduction in future average MLSS concentration would reduce the secondary clarifiers load and increase process stability; the effluent total phosphorus concentration and the nitrate load of the denitrifying filters would be approximately halved, leading to enhanced nutrient removal treatment and reliability.

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Reducing Ammonia and Phosphorus Recycle Loads by Struvite Harvesting

Cited by 7 publications

References 0 publications

Advanced Separation Processes for Recovery of Critical Raw Materials From Renewable and Waste Resources

Advanced Separation Processes for Recovery of Critical Raw Materials From Renewable and Waste Resources

Incorporation of an Intentional Struvite Precipitation Model into a Whole-plant Process Simulator

EBPR with Struvite Recovery to Reduce Chemical Consumption and Increase Nutrient Removal Reliability

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