Crystallisation Process Enables Environmental Friendly Phosphate Removal at Low Costs

Giesen, Andreas

doi:10.1080/09593332008616873

Cited by 73 publications

(34 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Literatures published indicated that, although removal of ammonium as struvite is technically feasible, it is not economically viable because of the high cost of the magnesium and phosphate salts (Giesen 1999;He et al 2007). Therefore, in order to facilitate the application of struvite precipitation, its treatment cost is required to be lowered.…”

Section: Introductionmentioning

confidence: 99%

Removal of ammonium from rare-earth wastewater using natural brucite as a magnesium source of struvite precipitation

Huang

Xiao

Yang

et al. 2011

Water Science and Technology

View full text Add to dashboard Cite

This paper presents a study regarding ammonium removal from rare-earth wastewater by struvite precipitation with natural brucite mineral as a source of magnesium. Experimental results indicated that a pH ranging from 8.5 to 9.5 was the optimum for the removal of ammonium using the soluble form of brucite as a magnesium source. Additionally, when solid brucite was used as a magnesium source as well as an alkali reagent, the initial ammonium concentration of 4,535 mg/L decreased to 239-317 mg/L after an reaction time of 12 h in wastewater treated with the S/L (solid brucite/liquid wastewater) ratios ranging from 31.2 to 63.2 g/L. Furthermore, as some non-reacted brucite still remained in the precipitates obtained at the end of reaction, the precipitates were subjected to reuse. The reuse results demonstrated that the reuse of the precipitates obtained with 63.2 g/L was feasible, and almost half of the brucite dose could be saved.Key words 9 9 9 9 ammonium, brucite mineral, phosphorus, rare-earth, struvite precipitation

show abstract

Section: Introductionmentioning

confidence: 99%

Removal of ammonium from rare-earth wastewater using natural brucite as a magnesium source of struvite precipitation

Huang

Xiao

Yang

et al. 2011

Water Science and Technology

View full text Add to dashboard Cite

show abstract

“…Struvite is convenient in that it may be precipitated directly as fertilizer pebbles of 5 mm diameter (Giesen, 1999), or small angular crystals (Abma et al, 2009) which form sticky clumps upon drying (Author, personal experience). Heating of struvite above 50 °C will lead to a simultaneous loss of water and ammonia from the struvite crystal, and at 250 °C, only MgHPO 4 remains (Bhuiyan et al, 2008;Sarkar, 1991).…”

Section: Introductionmentioning

confidence: 99%

Safety and Effectiveness of Struvite from Black Water and Urine as a Phosphorus Fertilizer

Gell¹,

Ruijter²,

Kuntke³

et al. 2011

JAS

View full text Add to dashboard Cite

To ensure food supply, phosphorus must be recycled, for which an appealing method is using struvite fertilizer from human excreta. One struvite from black water and another from urine were assessed for safety under Dutch regulations, and for effectiveness as P fertilizer in a maize field experiment and a literature review. Both struvites contained 12% P, 12% Mg, 6% N, and 0.5-1.5% of several micronutrients. Struvites did not exceed Dutch regulations for heavy metals or pathogens, and based on literature, organic toxins should be far below regulatory limits. In this study and 18 others, struvite appears to have similar effectiveness to soluble fertilizer. Early in the season, 200 kg P 2 O 5 ha -1 of black water struvite and soluble phosphorus improved maize performance (P<0.05), however at harvest, differences in yield and biomass P content were not significant. Problems of Mg accumulation in soil can be avoided by liming and accurate fertilization. Overall, the studied struvites are safe and effective fertilizers.

show abstract

“…This produces calcium phosphate without organic matter or other impurities (van Dijk & Braakensiek, 1984;Eggers et al, 1991;Seckler et al, 1996a,b,c;Angel, 1999;Giesen, 1999) or struvite (magnesium ammonium phosphate) (Ueno & Fujii, 2001;Parsons et al, 2001;Britton et al, 2009). Calcium phosphate, which is equivalent to rock phosphate, can be processed industrially (Schipper et al, 2001).…”

Section: Phosphorus Recovery From Wastewatermentioning

confidence: 99%

Management of Phosphorus Resources – Historical Perspective, Principal Problems and Sustainable Solutions

Cohen¹,

Kirchmann²,

Enfält³

2011

Integrated Waste Management - Volume II

View full text Add to dashboard Cite

Crystallisation Process Enables Environmental Friendly Phosphate Removal at Low Costs

Cited by 73 publications

References 0 publications

Removal of ammonium from rare-earth wastewater using natural brucite as a magnesium source of struvite precipitation

Removal of ammonium from rare-earth wastewater using natural brucite as a magnesium source of struvite precipitation

Safety and Effectiveness of Struvite from Black Water and Urine as a Phosphorus Fertilizer

Management of Phosphorus Resources – Historical Perspective, Principal Problems and Sustainable Solutions

Contact Info

Product

Resources

About