Enhanced struvite (MgNH4PO4·6H2O) granulation and separation from synthetic wastewater using fluidized-bed crystallization (FBC) technology

Ha, Thi-Hanh; Mahasti, Nicolaus N.N.; Lin, Chun-Ping; Lu, Ming‐Chun; Huang, Yao-Hui

doi:10.1016/j.jwpe.2023.103855

Cited by 15 publications

(3 citation statements)

References 48 publications

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“…Additionally, the XRD profile displayed characteristic peaks indicative of crystalline structure in the precipitate Fig 7 (c). These peaks matched the standard powder diffraction card peak for MAP, as reported by (Ha et al 2023).…”

Section: Nh4-n and Po4-p Removal By Struvite Precipitationsupporting

confidence: 83%

Methane Production and Nutrient Recovery after Applying MW Technology in Sewage Sludge Pretreatment

ALHRAISHAWI,

Aslan,

Ozturk

2023

Preprint

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This study investigates the effect of microwave (MW) treatment on the disintegration of municipal activated sludge. Sludge samples underwent heating at a targeted temperature of 90°C for 35 minutes, with a 5-minute retention time. Soluble chemical oxygen demand (sCOD), sugars, proteins, nitrogen (N), and phosphorus (P) exhibited notable increases compared to untreated samples. Results indicate a substantial (42-45%) rise in methane production during the anaerobic digestion process of the disintegrated sludge compared to the untreated counterpart Methane production was estimated using a transference model, which showed the best fit compared to other models. Further experimentation involved testing digested sludge with excess soluble ammonium for the recovery of struvite at a 1.50/1/1 (Mg/N/P) ratio. The findings reveal that up to 90.09% and 90.43% of orthophosphate and ammonium, respectively, can be efficiently removed from the solution. Despite the increased methane output, the energy recovered was insufficient to offset the electrical energy used by the MW. Notably, the sludge filter resistance performance deteriorated significantly, increasing from 1.64×1014 m/kg for the control sludge to 3.76×1014 m/kg for the treated sludge.

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Section: Nh4-n and Po4-p Removal By Struvite Precipitationsupporting

confidence: 83%

Methane Production and Nutrient Recovery after Applying MW Technology in Sewage Sludge Pretreatment

ALHRAISHAWI,

Aslan,

Ozturk

2023

Preprint

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“…Three possible stages for granulation mechanisms occurring in FBHC reactor have been suggested in Fig. 1a [12,13], including: (a) The first stage is homogeneous nucleation, occurring in the lower part, initiated by the mixing of concentrated reactants at the inlet. This leads to reduced supersaturation and encourages crystal aggregation.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, calcite is a common mineral in geological and archaeological contexts. The granule of calcite is the main component of limestone, chalk, marble, travertine, and is often a major component of wind-borne sediment (loess) and cemented sediments [13]. Calcium carbonate also has many applications, such as fillers for plastics, papers, and rubbers [14].…”

Section: Introductionmentioning

confidence: 99%

Application of fluidized-bed homogeneous crystallization technology to carbon sequestration and recovery from flue gas

Huang,

Vilando,

et al. 2024

Sustain Environ Res

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The Earth’s energy balance produced by human activity is the main factor in the complex relationship between greenhouse gases and global warming. The Taiwan Environmental Protection Agency reports that carbon dioxide makes up more than 95% of Taiwan’s most recent greenhouse gas emissions. This study used fluidized-bed homogeneous crystallization (FBHC) technology to recover carbonate in a simulated CO2-enriched flue gas. It was specifically designed to determine how carbonate removal and crystallization efficiency were affected by carbonate surface loading, the influence of the source of calcium ions, and interfering substances. Results revealed that the best surface loading at 55 kg m− 2 h− 1 achieved 93% removal and 84% crystallization efficiency. At 50 mg L− 1 of sulfate ions, the presence of more interfering compounds tends to reduce carbonate removal to 97% and 91% crystallization. Regarding X-ray diffraction data, the recovered carbonate crystals resembled calcium carbonate crystals. It has been demonstrated that carbonate can be recovered using FBHC technology as a method of CO2 capture and storage.

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Performance evaluation of a microbial fuel cell for resource recovery as struvite and bioelectricity generation from slaughterhouse wastewater

Chandrasekharan,

Sathiasivan,

Ramaswamy

2024

J of Chemical Tech & Biotech

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BackgroundMicrobial fuel cell, a potential cost‐effective technology for the energy neutral treatment of wastewater. However, the successful implementation of this technology in resource recovery is still limited. In this study, a microbial electrochemical cell was designed and operated for 30 days. The critical factors assessed for removal and recovery of N and P as struvite from wastewater.ResultsThe optimization studies on critical factors like the chemical oxygen demand of wastewater (500–2000 mg/L) and cathode aeration rate (45–135 mL/min) were conducted using the pure culture of Escherichia coli. The system yielded an average power densityof 465 mW/m2, average current density of 915 mA/m2 and P recovery at an extent of 40% as struvite. Additionally the maximum reduction in the COD of 90% with an average coulombic efficiency of about 82% was obtained at a short interval of 30 days. The solubility studies of the recovered struvite for 12 h. at different pH from 4.5 to 9 showed maximum solubility of 80% at 4.5 and minimum of 3.5% at 9.ConclusionThis study moves one step closer to applying MFC technology for N and P‐rich wastewater treatment with concurrent struvite precipitation and electricity production. In this way, Sustainable Development Goals 2, 6, and 7 can be achieved through resource recovery, clean water, and bioenergy.This article is protected by copyright. All rights reserved.

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Enhanced struvite (MgNH4PO4·6H2O) granulation and separation from synthetic wastewater using fluidized-bed crystallization (FBC) technology

Cited by 15 publications

References 48 publications

Methane Production and Nutrient Recovery after Applying MW Technology in Sewage Sludge Pretreatment

Methane Production and Nutrient Recovery after Applying MW Technology in Sewage Sludge Pretreatment

Application of fluidized-bed homogeneous crystallization technology to carbon sequestration and recovery from flue gas

Performance evaluation of a microbial fuel cell for resource recovery as struvite and bioelectricity generation from slaughterhouse wastewater

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