Characterization of induced struvite formation from source-separated urine using seawater and brine as magnesium sources
Struvite (MgNH4PO4·6H2O) precipitation is widely used for nutrient recovery from source-separated urine in view of limited natural resources. Spontaneous struvite formation depletes the magnesium in hydrolyzed urine so that additional magnesium source is required to produce induced struvite for P-re...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2016
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/80271 http://hdl.handle.net/10220/40467 |
| _version_ | 1826121335759175680 |
|---|---|
| author | Liu, Bianxia Giannis, Apostolos Zhang, Jiefeng Chang, Victor Wei-Chung Wang, Jing Yuan |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Liu, Bianxia Giannis, Apostolos Zhang, Jiefeng Chang, Victor Wei-Chung Wang, Jing Yuan |
| author_sort | Liu, Bianxia |
| collection | NTU |
| description | Struvite (MgNH4PO4·6H2O) precipitation is widely used for nutrient recovery from source-separated urine in view of limited natural resources. Spontaneous struvite formation depletes the magnesium in hydrolyzed urine so that additional magnesium source is required to produce induced struvite for P-recovery. The present study investigated the morphology and purity of induced struvite crystals obtained from hydrolyzed urine by using seawater and desalination brine as low cost magnesium sources. The results demonstrated that both seawater and brine were effective magnesium sources to recover phosphorus from hydrolyzed urine. Crystals obtained from synthetic and real urine were revealed that the morphology was feather and coffin shape, respectively. Structural characterization of the precipitates confirmed that crystallized struvite was the main product. However, co-precipitates magnesium calcite and calcite were observed when seawater was added into synthetic and real urine, respectively. It was found that the presence of calcium in the magnesium sources could compromise struvite purity. Higher struvite purity could be obtained with higher Mg/Ca ratio in the magnesium source. Comparative analysis indicated that seawater and brine had similar effect on the crystallized struvite purity. |
| first_indexed | 2024-10-01T05:30:41Z |
| format | Journal Article |
| id | ntu-10356/80271 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:30:41Z |
| publishDate | 2016 |
| record_format | dspace |
| spelling | ntu-10356/802712020-03-07T11:43:46Z Characterization of induced struvite formation from source-separated urine using seawater and brine as magnesium sources Liu, Bianxia Giannis, Apostolos Zhang, Jiefeng Chang, Victor Wei-Chung Wang, Jing Yuan School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Urine Struvite Phosphorus recovery Seawater Brine Equilibrium model Struvite (MgNH4PO4·6H2O) precipitation is widely used for nutrient recovery from source-separated urine in view of limited natural resources. Spontaneous struvite formation depletes the magnesium in hydrolyzed urine so that additional magnesium source is required to produce induced struvite for P-recovery. The present study investigated the morphology and purity of induced struvite crystals obtained from hydrolyzed urine by using seawater and desalination brine as low cost magnesium sources. The results demonstrated that both seawater and brine were effective magnesium sources to recover phosphorus from hydrolyzed urine. Crystals obtained from synthetic and real urine were revealed that the morphology was feather and coffin shape, respectively. Structural characterization of the precipitates confirmed that crystallized struvite was the main product. However, co-precipitates magnesium calcite and calcite were observed when seawater was added into synthetic and real urine, respectively. It was found that the presence of calcium in the magnesium sources could compromise struvite purity. Higher struvite purity could be obtained with higher Mg/Ca ratio in the magnesium source. Comparative analysis indicated that seawater and brine had similar effect on the crystallized struvite purity. 2016-04-28T07:42:46Z 2019-12-06T13:46:14Z 2016-04-28T07:42:46Z 2019-12-06T13:46:14Z 2013 2013 Journal Article Liu, B., Giannis, A., Zhang, J., Chang, V. W. -C., & Wang, J. Y. (2013). Characterization of induced struvite formation from source-separated urine using seawater and brine as magnesium sources. Chemosphere, 93(11), 2738-2747. 0045-6535 https://hdl.handle.net/10356/80271 http://hdl.handle.net/10220/40467 10.1016/j.chemosphere.2013.09.025 173880 en Chemosphere © 2013 Elsevier Ltd. |
| spellingShingle | Urine Struvite Phosphorus recovery Seawater Brine Equilibrium model Liu, Bianxia Giannis, Apostolos Zhang, Jiefeng Chang, Victor Wei-Chung Wang, Jing Yuan Characterization of induced struvite formation from source-separated urine using seawater and brine as magnesium sources |
| title | Characterization of induced struvite formation from source-separated urine using seawater and brine as magnesium sources |
| title_full | Characterization of induced struvite formation from source-separated urine using seawater and brine as magnesium sources |
| title_fullStr | Characterization of induced struvite formation from source-separated urine using seawater and brine as magnesium sources |
| title_full_unstemmed | Characterization of induced struvite formation from source-separated urine using seawater and brine as magnesium sources |
| title_short | Characterization of induced struvite formation from source-separated urine using seawater and brine as magnesium sources |
| title_sort | characterization of induced struvite formation from source separated urine using seawater and brine as magnesium sources |
| topic | Urine Struvite Phosphorus recovery Seawater Brine Equilibrium model |
| url | https://hdl.handle.net/10356/80271 http://hdl.handle.net/10220/40467 |
| work_keys_str_mv | AT liubianxia characterizationofinducedstruviteformationfromsourceseparatedurineusingseawaterandbrineasmagnesiumsources AT giannisapostolos characterizationofinducedstruviteformationfromsourceseparatedurineusingseawaterandbrineasmagnesiumsources AT zhangjiefeng characterizationofinducedstruviteformationfromsourceseparatedurineusingseawaterandbrineasmagnesiumsources AT changvictorweichung characterizationofinducedstruviteformationfromsourceseparatedurineusingseawaterandbrineasmagnesiumsources AT wangjingyuan characterizationofinducedstruviteformationfromsourceseparatedurineusingseawaterandbrineasmagnesiumsources |