| Title |
Recovery of nitrogen as struvite from swine wastewater: Comparison study of batch and continuous fluidized-bed crystallization process |
| ID_Doc |
8821 |
| Authors |
Ha, TH; Mahasti, NNN; Ha, HQ; Liao, PL; Huang, YH; Lu, MC |
| Title |
Recovery of nitrogen as struvite from swine wastewater: Comparison study of batch and continuous fluidized-bed crystallization process |
| Year |
2024 |
| Published |
|
| DOI |
10.1016/j.seppur.2024.128045 |
| Abstract |
The recovery of valuable compounds from waste supports the idea of a circular economy. Two systems were introduced in this study to recover nitrogen as struvite from swine wastewater, including batch stirred and fluidized-bed homogeneous crystallization (FBHC) systems. MgCl2 and NaH2PO4 were applied as precipitants to form struvite. In the batch stirred system, the removal efficiency of NH4+, Mg2+, and PO43- reached the optimum condition of 92.1 %, 75.6 %, and 91.1 %, respectively, under the operating conditions of pH 9 and an Mg/P molar ratio of 1.2. In the same operating conditions, the Crystallization ratio (CR) and Total Removal (TR) of the FBHC system reached 83.2 % and 89.1 %; 86.7 % and 90.6 %; 71.2 % and 76.1 % for NH4+, Mg2+, and PO43-, respectively. The XRD and FT-IR analyses confirmed the high purity and quality of the struvite solid product. However, the water content of the FBHC product is much lower than that of the batch-stirred system (5.8 % and 95.3 %, respectively). The great potential of swine wastewater as a nitrogen source for fertilizer production is evidenced by the high purity struvite product (>85.0 %). |
| Author Keywords |
Chemical precipitation; Nitrogen recovery; Swine wastewater; Fluidized-bed reactor |
| Index Keywords |
Index Keywords |
| Document Type |
Other |
| Open Access |
Open Access |
| Source |
Science Citation Index Expanded (SCI-EXPANDED) |
| EID |
WOS:001247125200003 |
| WoS Category |
Engineering, Chemical |
| Research Area |
Engineering |
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