Using mass struvite precipitation to remove recalcitrant nutrients and micropollutants from anaerobic digestion dewatering centrate

Abel-Denee, M.; Abbott, Timothy; Eskicioğlu, Çiğdem

doi:10.1016/j.watres.2018.01.004

Cited by 55 publications

(15 citation statements)

References 42 publications

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“…At treatment facilities where sludge is digested anaerobically, a number of methods for removing or recovering nitrogen and phosphorus from the sidestream are currently available. For instance, nitrogen and phosphorus can be recovered through engineered precipitation of struvite (Abel-Denee, Abbott, & Eskicioglu, 2018;Battistoni, Pavan, Prisciandaro, & Cecchi, 2000;Latimer, Rohrbacher, Nguyen, Khunjar, & Jeynayagam, 2015;LeCorre, Valsami-Jones, Hobbs, & Parsons, 2009;Shu, Schneider, Jegatheesan, & Johnson, 2006). Alternatively, nitrogen can be removed through advanced biological processes such as "shortcut" nitrogen removal (Abeling & Seyfried, 1992;Ciudad et al, 2005;Mosquera-Corral, González, Campos, & Méndez, 2005;Peng & Zhu, 2006;Turk & Mavinic, 1986;van Kempen, Mulder, Uijterlinde, & Loosdrecht, 2001;Yoo et al, 1999) or partial nitritation with anaerobic ammonium oxidation (anammox) (van Dongen, Jetten, & van Loosdrecht, 2001;Fux, Boehler, Huber, Brunner, & Siegrist, 2002;Joss et al, 2009;Lackner et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Mass fluxes of nitrogen and phosphorus through water reclamation facilities: Case study of biological nutrient removal, aerobic sludge digestion, and sidestream recycle

Kassouf

Parra

Mulford

et al. 2019

Water Environment Research

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At water reclamation facilities, recycling of nutrients (nitrogen and phosphorus) from solids‐handling processes to the mainstream treatment process can have detrimental effects on biological nutrient removal systems. In this study, mass fluxes of nitrogen and phosphorus were quantified through the treatment trains at the Northwest Regional Water Reclamation Facility (NWRWRF) and the adjoining Biosolids Management Facility (BMF), which receives sludge from several water reclamation facilities in Hillsborough County, Florida. The driving objectives were to determine (a) whether the return stream from BMF to NWRWRF (i.e., the “sidestream”) represents a significant source of nitrogen and phosphorus to NWRWRF, and (b) whether the sidestream return from BMF is interfering with biological nutrient removal processes at NWRWRF. We determined that nearly half of the overall phosphorus flux into NWRWRF is recycled from the BMF sidestream. This leads to an increased cost of treatment, for example, for alum used in phosphorus removal at NWRWRF. In contrast to phosphorus, the flux of nitrogen from BMF to NWRWRF is small (~3%) compared with the flux of nitrogen entering NWRWRF in raw wastewater. However, nitrogen in the sidestream is mostly in the form of nitrate, which prevents anaerobic conditions from developing in the fermentation basin at NWRWRF, and thereby interferes with the enhanced biological phosphorus removal (EBPR) process. Some measurements suggest that fermentation and release of phosphorus may occur in the return activated sludge line (despite the relatively short residence time in that line), which supports EBPR and may partially compensate for anoxic (denitrifying) conditions in the fermentation basin. Therefore, overall, NWRWRF is able to meet its permit limits for phosphorus through a combination of EBPR and alum addition. Although the fluxes measured here are particular to the treatment systems under consideration, the general trends observed are likely to apply to many similar facilities that employ biological nutrient removal, aerobic digestion, and sidestream recycle, particularly those with regional biosolids management facilities. We recommend that such facilities consider (a) removal or recovery of phosphorus from their sidestreams and (b) returning sidestreams downstream of fermentation basins to avoid inhibition of EBPR processes. Practitioner points Sidestreams from aerobic digestion can represent significant sources of phosphorus to mainstream wastewater treatment. Recycle of nitrate in aerobic digestion sidestreams can interfere with enhanced biological phosphorus removal (EBPR) during mainstream treatment. Fermentation of return activated sludge (RAS) can support EBPR, even under short average hydraulic residence times (minutes).

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Section: Introductionmentioning

confidence: 99%

Mass fluxes of nitrogen and phosphorus through water reclamation facilities: Case study of biological nutrient removal, aerobic sludge digestion, and sidestream recycle

Kassouf

Parra

Mulford

et al. 2019

Water Environment Research

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“…In wastewater side-streams such as dewatering filtrate and centrate, ammonium and phosphorus are typically found in excess compared with magnesium, often by orders of magnitude (Abel-Denee et al, 2018;Doyle and Parsons, 2002;Fattah et al, 2008;Jaffer et al, 2002). Ammonium specifically is often in excess compared with both phosphorus and magnesium (Doyle and Parsons, 2002).…”

Section: Struvite Characterization Formation and Recoverymentioning

confidence: 99%

“…In wastewaters, magnesium is generally the limiting component for struvite formation (Abel-Denee et al, 2018;Doyle and Parsons, 2002;Fattah et al, 2008;Jaffer et al, 2002).…”

Section: Chapter 1 -Introductionmentioning

confidence: 99%

“…This is desirable as phosphorus demand is expected to outstrip supply by the year 2035 (Cordell et al, 2009). Furthermore, removal of nutrients is often required by discharge regulations in order to minimize the potential for eutrophication of receiving water bodies (Abel-Denee et al, 2018;Doyle and Parsons, 2002;Korchef et al, 2011). Performing nutrient recovery in side-stream processes aids this in reducing the nutrient loading to the wastewater treatment facility.…”

Section: Introductionmentioning

confidence: 99%

“…Struvite contains both nitrogen in the form of ammonium and phosphorus in the form of phosphate, and therefore its recovery removes both of these nutrients from the side-stream. In wastewaters, magnesium is generally the limiting component for struvite formation (Abel-Denee et al, 2018;Doyle and Parsons, 2002;Fattah et al, 2008;Jaffer et al, 2002). Accordingly, it is generally added to wastewater side-stream processes for struvite formation and precipitation (Doyle et al, 2000;Fattah et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Towards Real-time sludge dewatering process optimization using ultraviolet-visible spectrophotometry and torque rheology

Gerber¹

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The treatment of biosolids is becoming a larger focus of wastewater treatment facilities due to the growing associated costs and optimization potentials. Presently, most operations are controlled manually, which often results in sub-optimal process performance. The goals of this research were to develop systems to optimize sludge treatment processes. The first study in this thesis analyzed and improved the sensitivity of UV-Vis spectrophotometry for the detection of polymer in dewatered sludge supernatant. The second study developed a two-stage in-line and real-time optimum polymer dose monitoring system. This system employed torque rheology as the upstream monitor and UV-Vis spectrophotometry as the downstream monitor relative to the dewatering process. Laboratory scale experiments found the system to be generally reliable and accurate. The third study developed a method for nutrient recovery optimization in sludge supernatant after dewatering. This method employed UV-Vis spectrophotometry as a monitor for struvite formation through magnesium addition.ii

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The electrochemistry of ammonium dihydrogen phosphate, disodium phosphate, ammonium chloride on Mg‐based and polycrystalline Pt electrodes

Kékedy‐Nagy

Abolhassani

Greenlee

et al. 2021

Electrochemical Science Adv

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In this study, the electrochemical mechanisms of struvite formation were investigated by studying the behavior of Mg-based and (poly)crystalline-Pt electrodes in the presence of ammonium dihydrogen phosphate, disodium phosphate, and ammonium chloride solutions. It was found that a precipitate was formed on the Mg-based electrodes, while the poly-Pt electrode showed typical voltammetric features in aqueous electrolytes. The structure, morphology, and composition of the electrochemically obtained precipitates collected from the surface of the Mg-based electrodes were analyzed by scanning electron microscopy (SEM), Xray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results showed that the precipitate morphology was impacted by the composition of the electrolytes and the purity of the magnesium. Moreover, the Tafel kinetics and corrosion rates (v corr ) directly correlated with the electrolyte and the electrode material compositions, whereby both showed a general increase when the Mgbased electrodes were employed in the presence of chloride anions. The Tafel slopes (β) obtained for the oxygen reduction reaction (ORR) with the poly-Pt electrode showed a significant difference between the forward and reverse potential scans in the various electrolytes used, a finding which was mainly attributed to the adsorption of hydroxide species, alkali cations, and phosphate anions to the surface whereby these species blocked the ORR active sites.

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Using mass struvite precipitation to remove recalcitrant nutrients and micropollutants from anaerobic digestion dewatering centrate

Cited by 55 publications

References 42 publications

Mass fluxes of nitrogen and phosphorus through water reclamation facilities: Case study of biological nutrient removal, aerobic sludge digestion, and sidestream recycle

Mass fluxes of nitrogen and phosphorus through water reclamation facilities: Case study of biological nutrient removal, aerobic sludge digestion, and sidestream recycle

Towards Real-time sludge dewatering process optimization using ultraviolet-visible spectrophotometry and torque rheology

The electrochemistry of ammonium dihydrogen phosphate, disodium phosphate, ammonium chloride on Mg‐based and polycrystalline Pt electrodes

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