A Comprehensive Review of Phosphorus Removal Technologies and Processes

Ramasahayam, Sunil Kumar; Guzman, Loren; Gunawan, Gunawan; Viswanathan, Tito

doi:10.1080/10601325.2014.906271

Cited by 92 publications

(52 citation statements)

References 94 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Floodwater pH was greater than pore water pH for most DAFs in all soils (Fig. 3b), thus favoring precipitation of P with Ca and/or Mg (Ramasahayam et al, 2014; Song et al, 2002). …”

Section: Resultsmentioning

confidence: 99%

Gypsum Amendment Reduces Redox‐Induced Phosphorous Release from Freshly Manured, Flooded Soils to Floodwater

et al. 2019

View full text Add to dashboard Cite

The effectiveness of gypsum in reducing runoff P losses from soils and the mechanisms responsible are well documented; however, gypsum amendment effects in reducing redox‐induced P losses from flooded soils are less researched and documented. We examined the effect of gypsum amendment on P release from freshly manured soils to pore water and floodwater with continuous flooding for 56 d in the laboratory. Three soils (Pembina, Denham, and Dencross series) collected from Manitoba, Canada, were preincubated with liquid swine manure. Each preincubated manured soil was packed into vessels with or without recycled wallboard gypsum in triplicates and flooded for 56 d, during which pore water and floodwater were sampled weekly and analyzed for pH and dissolved reactive P (DRP), Ca, Mg, Fe, and Mn concentrations. Change in soil redox potential (Eh) with flooding was also monitored. Wallboard gypsum amendment significantly decreased the pore water and surface floodwater DRP concentrations in all three soils for most days after flooding (DAF). The Dencross soil, which had Olsen P about fivefold greater than the other soils, showed the greatest magnitude decrease in DRP concentration with gypsum amendment, by 1.27 mg L−1 on 49 DAF and 0.99 mg L−1 on 21 DAF for pore water and floodwater, respectively. Gypsum amendment (i) delayed the Eh reduction with flooding beyond +200 mV, (ii) decreased pore water pH, and (iii) increased concentrations of Ca, Mg, and Mn in pore water favoring precipitation of P, all of which may have directly or indirectly reduced the P release from flooded soils to overlying floodwater. Core Ideas Floodwater P concentration increased with flooding time in all soils and treatments. Redox‐induced P release was less from gypsum‐amended than unamended soils. Gypsum amendment reduced both pore water and floodwater P concentrations. Adding gypsum reduced floodwater P concentration to a maximum of 57%. The effectiveness of gypsum in reducing P release from flooded soils is soil dependent.

show abstract

“…Floodwater pH was greater than pore water pH for most DAFs in all soils (Fig. 3b), thus favoring precipitation of P with Ca and/or Mg (Ramasahayam et al, 2014; Song et al, 2002). …”

Section: Resultsmentioning

confidence: 99%

Gypsum Amendment Reduces Redox‐Induced Phosphorous Release from Freshly Manured, Flooded Soils to Floodwater

et al. 2019

View full text Add to dashboard Cite

show abstract

“…These differences might have been caused by differences of biological uptake, adsorption, etc. [30,31,32] but more studies are needed.…”

Section: Resultsmentioning

confidence: 99%

Modifications of Concentrations of Plant Macronutrient Ions in Digestate from Anaerobic Digestion during Nitrification Processes

Takemura¹,

Endo²,

Shibuya³

et al. 2016

JRST

View full text Add to dashboard Cite

ABSTRACT:The goal of this study was to establish a system for converting digestate from anaerobic digestion processes into liquid fertilizer for soilless culture. Modifications of concentrations of plant macronutrient ions during nitrification processes were investigated with digestate from a simulated municipal organic waste. Concentrations of phosphate and calcium ions in the nitrified digestate increased; the rates of increase were 15.3 mg L -1 d -1 and 17.6 mg L -1 d -1 , respectively. Moreover, concentrations of macronutrient ions, except for magnesium, in the nitrified digestate were similar to those in a standard nutrient solution that is commonly applied to soilless culture.

show abstract

“…Currently, phosphorus removal technologies mainly include chemical, biological and bio-chemical methods [11][12][13]. Among them, chemical technology is widely used to achieve low residual phosphorus concentrations so as to meet the discharge standard.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus removal using ferric–calcium complex as precipitant: Parameters optimization and phosphorus-recycling potential

Qiu

Zheng

et al. 2015

Chemical Engineering Journal

View full text Add to dashboard Cite

A Comprehensive Review of Phosphorus Removal Technologies and Processes

Cited by 92 publications

References 94 publications

Gypsum Amendment Reduces Redox‐Induced Phosphorous Release from Freshly Manured, Flooded Soils to Floodwater

Gypsum Amendment Reduces Redox‐Induced Phosphorous Release from Freshly Manured, Flooded Soils to Floodwater

Modifications of Concentrations of Plant Macronutrient Ions in Digestate from Anaerobic Digestion during Nitrification Processes

Phosphorus removal using ferric–calcium complex as precipitant: Parameters optimization and phosphorus-recycling potential

Contact Info

Product

Resources

About