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Changes to Struvite Growth and Morphology as Impacted by Low Molecular Weight Organics
https://orcid.org/0000-0002-3777-8014
https://orcid.org/0000-0002-9187-5579
Dissolved organics in wastewater affect struvite (MgNH4PO4·6H2O) morphology and precipitation rates. The impact of the low molecular weight (LMW) organics benzoate (C6H5-COO–), benzylamine (C6H5-CH2-NH3 +), and toluene (C6H5-CH3 0) on struvite precipitation at constant pH and saturation was modeled in simulated wastewater (SWW). Compared to the struvite precipitation rate in LMW-free blank SWW (38.52 μmol min–1), lowest struvite precipitation rates were observed when the cationic benzylamine and nonionic toluene were present in SWW (7.19 and 16.23 μmol min–1, respectively) and the highest precipitation rate was observed in the presence of anionic benzoate (389.32 μmol min–1). Changes to struvite morphology with respect to mineral size and roundness were observed over time. Struvite collected at reaction times near maximum growth rates (60 min) was elongated with variable average sizes for benzoate, benzylamine, toluene, and blank SWW (49, 37, 32, and 14 μm, respectively). At a longer reaction time (120 min), struvite size became similar but benzoate SWW struvite was rounder than those of toluene and benzylamine SWW. Recovery of wastewater nutrients as struvite improves with better gravimetric separation for larger and rounder particles; therefore, results for benzoate treatment indicate that introducing dissolved anionic LMW organics could assist with struvite production processes.
Precipitation of struvite (MgNH4PO4·6H2O) accelerated when benzoate was present, demonstrating the effect of anionic dissolved organic on nutrient recovery from livestock wastewater.
Changes to Struvite Growth and Morphology as Impacted by Low Molecular Weight Organics
https://orcid.org/0000-0002-3777-8014
https://orcid.org/0000-0002-9187-5579
Dissolved organics in wastewater affect struvite (MgNH4PO4·6H2O) morphology and precipitation rates. The impact of the low molecular weight (LMW) organics benzoate (C6H5-COO–), benzylamine (C6H5-CH2-NH3 +), and toluene (C6H5-CH3 0) on struvite precipitation at constant pH and saturation was modeled in simulated wastewater (SWW). Compared to the struvite precipitation rate in LMW-free blank SWW (38.52 μmol min–1), lowest struvite precipitation rates were observed when the cationic benzylamine and nonionic toluene were present in SWW (7.19 and 16.23 μmol min–1, respectively) and the highest precipitation rate was observed in the presence of anionic benzoate (389.32 μmol min–1). Changes to struvite morphology with respect to mineral size and roundness were observed over time. Struvite collected at reaction times near maximum growth rates (60 min) was elongated with variable average sizes for benzoate, benzylamine, toluene, and blank SWW (49, 37, 32, and 14 μm, respectively). At a longer reaction time (120 min), struvite size became similar but benzoate SWW struvite was rounder than those of toluene and benzylamine SWW. Recovery of wastewater nutrients as struvite improves with better gravimetric separation for larger and rounder particles; therefore, results for benzoate treatment indicate that introducing dissolved anionic LMW organics could assist with struvite production processes.
Precipitation of struvite (MgNH4PO4·6H2O) accelerated when benzoate was present, demonstrating the effect of anionic dissolved organic on nutrient recovery from livestock wastewater.
Changes to Struvite Growth and Morphology as Impacted by Low Molecular Weight Organics
https://orcid.org/0000-0002-3777-8014
https://orcid.org/0000-0002-9187-5579
Dissolved organics in wastewater affect struvite (MgNH4PO4·6H2O) morphology and precipitation rates. The impact of the low molecular weight (LMW) organics benzoate (C6H5-COO–), benzylamine (C6H5-CH2-NH3 +), and toluene (C6H5-CH3 0) on struvite precipitation at constant pH and saturation was modeled in simulated wastewater (SWW). Compared to the struvite precipitation rate in LMW-free blank SWW (38.52 μmol min–1), lowest struvite precipitation rates were observed when the cationic benzylamine and nonionic toluene were present in SWW (7.19 and 16.23 μmol min–1, respectively) and the highest precipitation rate was observed in the presence of anionic benzoate (389.32 μmol min–1). Changes to struvite morphology with respect to mineral size and roundness were observed over time. Struvite collected at reaction times near maximum growth rates (60 min) was elongated with variable average sizes for benzoate, benzylamine, toluene, and blank SWW (49, 37, 32, and 14 μm, respectively). At a longer reaction time (120 min), struvite size became similar but benzoate SWW struvite was rounder than those of toluene and benzylamine SWW. Recovery of wastewater nutrients as struvite improves with better gravimetric separation for larger and rounder particles; therefore, results for benzoate treatment indicate that introducing dissolved anionic LMW organics could assist with struvite production processes.
Precipitation of struvite (MgNH4PO4·6H2O) accelerated when benzoate was present, demonstrating the effect of anionic dissolved organic on nutrient recovery from livestock wastewater.
Changes to Struvite Growth and Morphology as Impacted by Low Molecular Weight Organics
Rabinovich, Alon (author) / Rouff, Ashaki. A. (author)
ACS ES&T Water ; 3 ; 2277-2285
2023-08-11
Article (Journal)
Electronic Resource
English
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