Struvite recovery from swine waste biogas digester effluent through a stainless steel device under constant pH conditions
OBJECTIVE: To investigate the struvite precipitation under constant and non-constant pH conditions and to test a stainless steel device under different operating regimes to maximize the recovery of struvite.
METHODS: The molar ratio of NH4+: Mg2+: PO4(3-) was adjusted to 1: 1.2: 1.2 and pH was elevated to 9.0. The absorbance measurement was used to trace the process of struvite crystallization. Wastewater and precipitate analysis was done by standard analytical methods.
RESULTS: The pH constant experiment reported a significantly higher struvite precipitation (24.6 +/- 0.86 g) than the non-constant pH experiment (19.8 +/- 1.86 g). The SAR ranged from 5.6 to 8.2 g m(-2) h(-1) to 3.6-4.8 g m(-2) h(-1) in pH constant and non-constant experiments, respectively. The highest struvite deposit on the device was found in regime 3 followed by in regimes 2 and 4. The highest PO4(3-) (97.2%) and NH4+ (71%) removal was reported in the R1 regime. None of the influent Cu2+ or Zn2+ was precipitated on the device.
CONCLUSION: A higher struvite yield is evident in pH constant experiments. Moreover, the stainless steel device facilitates the isolation of heavy metal free pure (around 96%) struvite from swine waste biogas digester effluent contaminated with cu2+ and Zn2+ and the highest yield is attainable with the device operating at 50 rpm with agitation by a magnetic stirrer.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2009 |
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| Erschienen: |
2009 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:22 |
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| Enthalten in: |
Biomedical and environmental sciences : BES - 22(2009), 3 vom: 01. Juni, Seite 201-9 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Perera, P W Anton [VerfasserIn] |
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| Links: |
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| Themen: |
12597-68-1 |
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| Anmerkungen: |
Date Completed 25.09.2009 Date Revised 08.06.2018 published: Print Citation Status MEDLINE |
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| doi: |
10.1016/S0895-3988(09)60046-5 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM191092622 |
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| 100 | 1 | |a Perera, P W Anton |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Struvite recovery from swine waste biogas digester effluent through a stainless steel device under constant pH conditions |
| 264 | 1 | |c 2009 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a ƒaComputermedien |b c |2 rdamedia | ||
| 338 | |a ƒa Online-Ressource |b cr |2 rdacarrier | ||
| 500 | |a Date Completed 25.09.2009 | ||
| 500 | |a Date Revised 08.06.2018 | ||
| 500 | |a published: Print | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a OBJECTIVE: To investigate the struvite precipitation under constant and non-constant pH conditions and to test a stainless steel device under different operating regimes to maximize the recovery of struvite | ||
| 520 | |a METHODS: The molar ratio of NH4+: Mg2+: PO4(3-) was adjusted to 1: 1.2: 1.2 and pH was elevated to 9.0. The absorbance measurement was used to trace the process of struvite crystallization. Wastewater and precipitate analysis was done by standard analytical methods | ||
| 520 | |a RESULTS: The pH constant experiment reported a significantly higher struvite precipitation (24.6 +/- 0.86 g) than the non-constant pH experiment (19.8 +/- 1.86 g). The SAR ranged from 5.6 to 8.2 g m(-2) h(-1) to 3.6-4.8 g m(-2) h(-1) in pH constant and non-constant experiments, respectively. The highest struvite deposit on the device was found in regime 3 followed by in regimes 2 and 4. The highest PO4(3-) (97.2%) and NH4+ (71%) removal was reported in the R1 regime. None of the influent Cu2+ or Zn2+ was precipitated on the device | ||
| 520 | |a CONCLUSION: A higher struvite yield is evident in pH constant experiments. Moreover, the stainless steel device facilitates the isolation of heavy metal free pure (around 96%) struvite from swine waste biogas digester effluent contaminated with cu2+ and Zn2+ and the highest yield is attainable with the device operating at 50 rpm with agitation by a magnetic stirrer | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 7 | |a Magnesium Compounds |2 NLM | |
| 650 | 7 | |a Manure |2 NLM | |
| 650 | 7 | |a Phosphates |2 NLM | |
| 650 | 7 | |a Stainless Steel |2 NLM | |
| 650 | 7 | |a 12597-68-1 |2 NLM | |
| 650 | 7 | |a Struvite |2 NLM | |
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| 700 | 1 | |a Wu, Wei-Xiang |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Ying-Xu |e verfasserin |4 aut | |
| 700 | 1 | |a Han, Zhi-Ying |e verfasserin |4 aut | |
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| 773 | 1 | 8 | |g volume:22 |g year:2009 |g number:3 |g day:01 |g month:06 |g pages:201-9 |
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