pH dependent phosphorus release from waste activated sludge: contributions of phosphorus speciation

Xu, Yunfeng; Hu, Hui; Liu, Jianyong; Luo, Jing; Qian, Guangren; Wang, Aijie

doi:10.1016/j.cej.2015.01.037

Cited by 185 publications

(56 citation statements)

References 38 publications

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“…The degree of this mechanism may be influenced by the surface composition and properties of the media as well as properties of coagulant intermediate products as they reach the filter bed. The latter will be affected by dosing point, mixing and chemical property of the wastewater such as alkalinity and pH value [30]. As noted above in relation to aluminium these findings require further confirmation before they can be accepted as more general phenomena.…”

Section: Resultsmentioning

confidence: 84%

Determination of the forms and stability of phosphorus in wastewater effluent from a variety of treatment processes

Comber

Gardner

Darmovzalova

et al. 2015

Journal of Environmental Chemical Engineering

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A B S T R A C TEutrophication of surface waters is a major issue across the planet, with diffuse (agricultural) and point sources (wastewater treatment works, WwTW) being the main inputs. In the UK WwTW effluent discharges are currently permitted for discharge based on total phosphorus concentration, whereas environmental quality standards (EQS) are set as soluble reactive phosphorus (SRP), which better reflects the bioavailable fraction of phosphorus present in water. This study reports for the first time, concentrations and relative proportions of SRP in effluent from a number of different WwTW employing aluminium and iron dosing for phosphorus removal. In the case of aluminium treatment, SRP constituted only 10 AE 4% of the 0.75 mg P/l total phosphorus in the effluent. Where iron was dosed SRP comprised 66% AE 20% of the total phosphorus present where a single dose was applied, which dropped to 26 AE 17% after a second dose and additional tertiary sand filtration. Phosphorus was determined using two established analytical methods after acid digestion, filtration to 0.45 mm (on site and after return to the laboratory and refrigeration for up to 9 days) and settlement. Phosphorus speciation was shown to be stable within all effluents for up to 6 days storage at a temperature of <5 C without the need to filter on site and this was recommended for future effluent monitoring programmes and compliance assessment. Furthermore, because iron and aluminium dosing significantly reduce the SRP proportion in effluents, future monitoring programmes and policy decisions regarding meeting the phosphorus EQS derived as SRP should take this into account.

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Section: Resultsmentioning

confidence: 84%

Determination of the forms and stability of phosphorus in wastewater effluent from a variety of treatment processes

Comber

Gardner

Darmovzalova

et al. 2015

Journal of Environmental Chemical Engineering

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“…(2016) [1][2][3][4][5][6][7] www.deswater.com doi: 10.1080/19443994.2016.1189697 advance treatment to meet the stringent discharge criteria of 0.2 mg/L phosphate as phosphorus [3].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

“…The nutrients recovered from the anaerobically digested effluent of swine wastewater can be a potential source of fertilizer, partially offsetting the wastewater treatment costs. Particularly, the depletion of phosphorus resources has been a major concern and a topic of discussion worldwide [6], although it is estimated that 7,000 million ton of phosphate rock exists. Crystallization processes, such as struvite and hydroxyapatite, are preferred to achieve these objectives [3,5].…”

Section: Desalination and Water Treatmentmentioning

confidence: 99%

Use of concentrate water from seawater desalination plant as magnesium sources for struvite formation by using anaerobically digested effluent of swine wastewater

Kim

Min

et al. 2016

Desalination and Water Treatment

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Young Park (2016): Use of concentrate water from seawater desalination plant as magnesium sources for struvite formation by using anaerobically digested effluent of swine wastewater, Desalination and Water Treatment, A B S T R A C TAlthough struvite crystallization has been proven an effective process to recover nutrients from wastewater, this method has not been used widely because of the cost of the raw chemicals, such as magnesium chloride, required as supplements. In this study, in view of the high cost of supplementing magnesium, reject water from a seawater reverse osmosis process was investigated as a potential source of magnesium. The magnesium was used in the nutrient recovery process, by which struvite crystallization was performed from the anaerobically digested effluent of swine wastewater. The results of all the experiments were positive, indicating that struvite formation was successfully performed from the effluent, using the concentrate water as a magnesium source. Removal efficiencies of up to 94.5% for phosphate and 12.7% for ammonium were achieved under normal operating conditions. Seed materials were successfully used as nucleation sites to enhance the purity of the struvite and the crystal size. The removal efficiencies of phosphate and ammonia could be improved up to 97 and 84%, respectively, by adding phosphate and seed materials.

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“…The key factors are temperature [5] [6] [7] pH [8] [9], dissolved oxygen [10], redox conditions (Eh) [11] [12], microbes [13] [14], SPM size distribution [15] [16] and SPM texture [17], the organic matter content of the sediment and salinity [18].…”

Section: Introductionmentioning

confidence: 99%

Do Water Matrix and Particulate Buffering Capacity Affect the Rate and Extent of P Release?

Zhao¹,

Xu²,

Li³

et al. 2018

JWARP

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The aim of this study was to investigate the release of inorganic and organic phosphorus species from particles in rivers and estuaries during resuspension events such as storm, wind and tidal induced turbulence. To achieve this aim, laboratory beaker experiments were designed with autoanalyzer 3 (AA3). The study first investigates phosphorus equilibration in ultra-pure water (UHP) water, biotic river water and abiotic river water under short term and long term conditions. Then, three typical organic and inorganic phosphorus compounds were selected (orthophosphate, phytic acid (PTA) and β-D-glucose-6-phosphate monosodium salt (G-6-P)) to simulate the effect of addition input to river and estuaries in the time period of 150 h. The results show that in a turbulent river, dissolved inorganic phosphorus (DIP) and dissolved organic phosphorus (DOP) will reach equilibrium between the particulate matter and the water column within 24 h. Additional input of DIP or DOP to the river, has different effects to the river nutrients balance. The buffering capacity of the suspended particulate matter (SPM) plays an important role and behavior difference to the inorganic and various organic phosphorus compounds.

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pH dependent phosphorus release from waste activated sludge: contributions of phosphorus speciation

Cited by 185 publications

References 38 publications

Determination of the forms and stability of phosphorus in wastewater effluent from a variety of treatment processes

Determination of the forms and stability of phosphorus in wastewater effluent from a variety of treatment processes

Use of concentrate water from seawater desalination plant as magnesium sources for struvite formation by using anaerobically digested effluent of swine wastewater

Do Water Matrix and Particulate Buffering Capacity Affect the Rate and Extent of P Release?

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