Recovery of phosphorus as struvite from sewage sludge ash
Phosphorus (P) is an element vital for all living organisms, yet the world's reserves of phosphate rock are becoming depleted. This study investigated an effective P recovery method from sludge ash via struvite precipitation. Results showed that more than 95% of the total P content was extracte...
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| Published in | Journal of environmental sciences (China) Vol. 24; no. 8; pp. 1533 - 1538 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Netherlands
Elsevier B.V
01.08.2012
State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-0742 1878-7320 |
| DOI | 10.1016/S1001-0742(11)60969-8 |
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| Abstract | Phosphorus (P) is an element vital for all living organisms, yet the world's reserves of phosphate rock are becoming depleted. This study investigated an effective P recovery method from sludge ash via struvite precipitation. Results showed that more than 95% of the total P content was extracted from sludge ash by applying 0.5 mol/L HCl at a liquid/solid ratio of 50 mL/g. Although heavy metal leaching also occurred during P extraction, cation exchange resin efficiently removed the heavy metals from the P-rich solution. Orthogonal tests showed that the optimal parameters for P precipitation as struvite would be a Mg:N:P molar ratio of 1.6:1.6:1 at pH 10.0. X-ray diffraction analysis validated the formation of struvite. Further investigations revealed that the harvested precipitate had a high struvite content (97%), high P bioavailability (94%), and low heavy metal content, which could be considered a high quality fertilizer. |
|---|---|
| AbstractList | Phosphorus （P） is an element vital for all living organisms, yet the world＇s reserves of phosphate rock are becoming depleted. This study investigated an effective P recovery method from sludge ash via struvite precipitation. Results showed that more than 95% of the total P content was extracted from sludge ash by applying 0.5 mol/L HC1 at a liquid/solid ratio of 50 mL/g. Although heavy metal leaching also occurred during P extraction, cation exchange resin efticiently removed the heavy metals from the P-rich solution. Orthogonal tests showed that the optimal parameters for P precipitation as struvite would be a Mg：N：P molar ratio of 1.6：1.6：1 at pH 10.0. X-ray diffraction analysis validated the formation of struvite. Further investigations revealed that the harvested precipitate had a high struvite content （97%）, high P bioavailability （94%）, and low heavy metal content, which could be considered a high quality fertilizer. Phosphorus (P) is an element vital for all living organisms, yet the world's reserves of phosphate rock are becoming depleted. This study investigated an effective P recovery method from sludge ash via struvite precipitation. Results showed that more than 95% of the total P content was extracted from sludge ash by applying 0.5 mol/L HCl at a liquid/solid ratio of 50 mL/g. Although heavy metal leaching also occurred during P extraction, cation exchange resin efficiently removed the heavy metals from the P-rich solution. Orthogonal tests showed that the optimal parameters for P precipitation as struvite would be a Mg: N: P molar ratio of 1.6: 1.6: 1 at pH 10.0. X-ray diffraction analysis validated the formation of struvite. Further investigations revealed that the harvested precipitate had a high struvite content (97%), high P bioavailability (94%), and low heavy metal content, which could be considered a high quality fertilizer. Phosphorus (P) is an element vital for all living organisms, yet the world's reserves of phosphate rock are becoming depleted. This study investigated an effective P recovery method from sludge ash via struvite precipitation. Results showed that more than 95% of the total P content was extracted from sludge ash by applying 0.5 mol/L HCl at a liquid/solid ratio of 50 mL/g. Although heavy metal leaching also occurred during P extraction, cation exchange resin efficiently removed the heavy metals from the P-rich solution. Orthogonal tests showed that the optimal parameters for P precipitation as struvite would be a Mg:N:P molar ratio of 1.6:1.6:1 at pH 10.0. X-ray diffraction analysis validated the formation of struvite. Further investigations revealed that the harvested precipitate had a high struvite content (97%), high P bioavailability (94%), and low heavy metal content, which could be considered a high quality fertilizer.Phosphorus (P) is an element vital for all living organisms, yet the world's reserves of phosphate rock are becoming depleted. This study investigated an effective P recovery method from sludge ash via struvite precipitation. Results showed that more than 95% of the total P content was extracted from sludge ash by applying 0.5 mol/L HCl at a liquid/solid ratio of 50 mL/g. Although heavy metal leaching also occurred during P extraction, cation exchange resin efficiently removed the heavy metals from the P-rich solution. Orthogonal tests showed that the optimal parameters for P precipitation as struvite would be a Mg:N:P molar ratio of 1.6:1.6:1 at pH 10.0. X-ray diffraction analysis validated the formation of struvite. Further investigations revealed that the harvested precipitate had a high struvite content (97%), high P bioavailability (94%), and low heavy metal content, which could be considered a high quality fertilizer. X703; Phosphorus(P)is an element vital for all living organisms,yet the world's reserves of phosphate rock are becoming depleted.This study investigated an effective P recovery method from sludge ash via struvite precipitation.Results showed that more than 95％ of the total P content was extracted from sludge ash by applying 0.5 mol/L HCl at a liquid/solid ratio of 50 mL/g.Although heavy metal leaching also occurred during P extraction,cation exchange resin efficiently removed the heavy metals from the P-rich solution.Orthogonal tests showed that the optimal parameters for P precipitation as struvite would be a Mg∶N∶P molar ratio of 1.6∶1.6∶1 at pH 10.0.X-ray diffraction analysis validated the formation of struvite.Further investigations revealed that the harvested precipitate had a high struvite content(97％),high P bioavailability(94％),and low heavy metal content,which could be considered a high quality fertilizer. |
| Author | Wang, Guanzhao Xu, Huacheng Gu, Weimei Shao, Liming He, Pinjing |
| AuthorAffiliation | State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China |
| AuthorAffiliation_xml | – name: State Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China |
| Author_xml | – sequence: 1 givenname: Huacheng surname: Xu fullname: Xu, Huacheng – sequence: 2 givenname: Pinjing surname: He fullname: He, Pinjing email: solidwaste@tongji.edu.cn – sequence: 3 givenname: Weimei surname: Gu fullname: Gu, Weimei – sequence: 4 givenname: Guanzhao surname: Wang fullname: Wang, Guanzhao – sequence: 5 givenname: Liming surname: Shao fullname: Shao, Liming |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/23513698$$D View this record in MEDLINE/PubMed |
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| Notes | Phosphorus （P） is an element vital for all living organisms, yet the world＇s reserves of phosphate rock are becoming depleted. This study investigated an effective P recovery method from sludge ash via struvite precipitation. Results showed that more than 95% of the total P content was extracted from sludge ash by applying 0.5 mol/L HC1 at a liquid/solid ratio of 50 mL/g. Although heavy metal leaching also occurred during P extraction, cation exchange resin efticiently removed the heavy metals from the P-rich solution. Orthogonal tests showed that the optimal parameters for P precipitation as struvite would be a Mg：N：P molar ratio of 1.6：1.6：1 at pH 10.0. X-ray diffraction analysis validated the formation of struvite. Further investigations revealed that the harvested precipitate had a high struvite content （97%）, high P bioavailability （94%）, and low heavy metal content, which could be considered a high quality fertilizer. phosphorus recovery; heavy metal; sewage sludge ash; struvite; X-ray diffraction 11-2629/X http://dx.doi.org/10.1016/S1001-0742(11)60969-8 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
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| Snippet | Phosphorus （P） is an element vital for all living organisms, yet the world＇s reserves of phosphate rock are becoming depleted. This study investigated an... Phosphorus (P) is an element vital for all living organisms, yet the world's reserves of phosphate rock are becoming depleted. This study investigated an... X703; Phosphorus(P)is an element vital for all living organisms,yet the world's reserves of phosphate rock are becoming depleted.This study investigated an... |
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| SubjectTerms | Ashes bioavailability cation exchange Chemical Precipitation fertilizers heavy metal Heavy metals hydrochloric acid Incineration leaching magnesium ammonium phosphate Magnesium Compounds - isolation & purification Phosphates - isolation & purification Phosphorus Phosphorus - chemistry Phosphorus - isolation & purification phosphorus recovery Precipitation Recovery Reserves Rock rock phosphate Sewage - chemistry sewage sludge ash Sludge sludge ash Struvite X-ray diffraction X-射线衍射分析 污水 污泥灰 磷回收 磷矿石 重金属含量 阳离子交换树脂 鸟粪石 |
| Title | Recovery of phosphorus as struvite from sewage sludge ash |
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