Thermal hydrolyzed food waste liquor as liquid organic fertilizer
Thermal hydrolysis (TH) is an efficient technology for food waste (FW) management. This study investigated the nutrients released from FW under various TH temperature (140, 160, 180, 200 and 220 °C) and evaluated the feasibility of the hydrolyzed liquor (HL) as liquid organic fertilizer. The phytoto...
| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/159708 |
| _version_ | 1826114425863536640 |
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| author | Gao, Shumei Lu, Dan Qian, Tingting Zhou, Yan |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Gao, Shumei Lu, Dan Qian, Tingting Zhou, Yan |
| author_sort | Gao, Shumei |
| collection | NTU |
| description | Thermal hydrolysis (TH) is an efficient technology for food waste (FW) management. This study investigated the nutrients released from FW under various TH temperature (140, 160, 180, 200 and 220 °C) and evaluated the feasibility of the hydrolyzed liquor (HL) as liquid organic fertilizer. The phytotoxicity and biotoxicity of HL was analyzed using wheat seed and Pseudomonas putida. Results revealed that TH could effectively solubilize FW and release nutrients (N, P and K) and organic substances. The highest content of total nitrogen (TN, 1685 mgN/L) and phosphorus (TP, 235 mgP/L) in the HL was obtained under 180 °C. The K+ was 278-293 mg/L regardless of treatment temperature. Secondary nutrients (Ca and Mg) and micro metals (Fe, Cu, Zn, Al, Co and Mn) were all detected at relatively high level, while heavy metals (As and Cd) were generally lower than 0.5 mg/L. Twenty types of free amino acid were identified and the maximum total concentration was 4965.13 mg/L. 2% HL displayed higher germination index (>80%) and enhanced root and shoot lengths. No biotoxicity was observed as confirmed by the bioassay. This study proposes a feasible method to solubilize food waste and produce liquid organic fertilizer. |
| first_indexed | 2024-10-01T03:39:17Z |
| format | Journal Article |
| id | ntu-10356/159708 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:39:17Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1597082022-06-29T06:12:41Z Thermal hydrolyzed food waste liquor as liquid organic fertilizer Gao, Shumei Lu, Dan Qian, Tingting Zhou, Yan School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Advanced Environmental Biotechnology Centre (AEBC) Engineering::Environmental engineering Food Waste Thermal Hydrolysis Thermal hydrolysis (TH) is an efficient technology for food waste (FW) management. This study investigated the nutrients released from FW under various TH temperature (140, 160, 180, 200 and 220 °C) and evaluated the feasibility of the hydrolyzed liquor (HL) as liquid organic fertilizer. The phytotoxicity and biotoxicity of HL was analyzed using wheat seed and Pseudomonas putida. Results revealed that TH could effectively solubilize FW and release nutrients (N, P and K) and organic substances. The highest content of total nitrogen (TN, 1685 mgN/L) and phosphorus (TP, 235 mgP/L) in the HL was obtained under 180 °C. The K+ was 278-293 mg/L regardless of treatment temperature. Secondary nutrients (Ca and Mg) and micro metals (Fe, Cu, Zn, Al, Co and Mn) were all detected at relatively high level, while heavy metals (As and Cd) were generally lower than 0.5 mg/L. Twenty types of free amino acid were identified and the maximum total concentration was 4965.13 mg/L. 2% HL displayed higher germination index (>80%) and enhanced root and shoot lengths. No biotoxicity was observed as confirmed by the bioassay. This study proposes a feasible method to solubilize food waste and produce liquid organic fertilizer. 2022-06-29T06:12:41Z 2022-06-29T06:12:41Z 2021 Journal Article Gao, S., Lu, D., Qian, T. & Zhou, Y. (2021). Thermal hydrolyzed food waste liquor as liquid organic fertilizer. Science of the Total Environment, 775, 145786-. https://dx.doi.org/10.1016/j.scitotenv.2021.145786 0048-9697 https://hdl.handle.net/10356/159708 10.1016/j.scitotenv.2021.145786 33621877 2-s2.0-85101141553 775 145786 en Science of the Total Environment © 2021 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Food Waste Thermal Hydrolysis Gao, Shumei Lu, Dan Qian, Tingting Zhou, Yan Thermal hydrolyzed food waste liquor as liquid organic fertilizer |
| title | Thermal hydrolyzed food waste liquor as liquid organic fertilizer |
| title_full | Thermal hydrolyzed food waste liquor as liquid organic fertilizer |
| title_fullStr | Thermal hydrolyzed food waste liquor as liquid organic fertilizer |
| title_full_unstemmed | Thermal hydrolyzed food waste liquor as liquid organic fertilizer |
| title_short | Thermal hydrolyzed food waste liquor as liquid organic fertilizer |
| title_sort | thermal hydrolyzed food waste liquor as liquid organic fertilizer |
| topic | Engineering::Environmental engineering Food Waste Thermal Hydrolysis |
| url | https://hdl.handle.net/10356/159708 |
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