Dual function of Lemna minor and Azolla pinnata as phytoremediator for Palm Oil Mill Effluent and as feedstock

被引:64
作者
Abd Kadir, Azlin [1 ]
Abdullah, Siti Rozaimah Sheikh [1 ]
Othman, Babul Airianah [2 ]
Abu Hasan, Hassimi [1 ]
Othman, Ahmad Razi [1 ]
Imron, Muhammad Fauzul [3 ]
Ismail, Nur Izzati [1 ]
Kurniawan, Setyo Budi [1 ]
机构
[1] Univ Kebangsaan Malaysia, Fac Engn & Built Environm, Dept Chem & Proc Engn, Bangi 43600, Selangor, Malaysia
[2] Univ Kebangsaan Malaysia, Fac Sci & Technol, Sch Biosci & Biotechnol, Ukm Bangi 43600, Selangor, Malaysia
[3] Univ Airlangga, Fac Sci & Technol, Dept Biol, Study Program Environm Engn, Kampus C UNAIR,Jalan Mulyorejo, Surabaya 60115, Indonesia
关键词
Animal feedstock; Duckweed; Nutrient extraction; Nutrient removal; POME; Wastewater; WASTE-WATER; NUTRIENT REMOVAL; COD REMOVAL; GROWTH; POME; FEED; PERFORMANCE; DEFICIENCY; NITROGEN; BIOMASS;
D O I
10.1016/j.chemosphere.2020.127468
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, two native duckweeds (Lemna minor and Azolla pinnata) were cultivated in Palm Oil Mill Effluent (POME) to extract nutrients from the effluent. Five grams of A. pinnata and 2 g of L. minor were transferred to 2 L POME (Initial concentrations: 198 mg/L COD, 4.3 mg/L nitrates, pH 9.53, 4 mg/L phosphate, 2.98 mg/L ammonia) with four different dilutions (2.5%, 5%, 10%, 15%) under greenhouse conditions. Samples of POME were taken every two days up to 10 days. Growth parameter, phosphate, ammonia, nitrates, pH, and COD were monitored within 10 days to select the most suitable growth medium for both plants. Results showed that 2.5% POME dilution had positive effect on L. minor growth and A. pinnata (wet weight increased by 8.7 g and 9.8 g, respectively), with all plants able to survive until the final day of exposure. The highest removal of ammonia was accomplished in 5% POME dilution by A. pinnata (98%) and L. minor (95.5%). The maximum phosphate removal was obtained in 10% POME dilution with 93.3% removal by A. pinnata and 86.7% by L. minor. Significant COD removal in 15% POME was obtained by L. minor (78%) and A. pinnata (66%). Both plants responded positively to the phytoremediation process, especially for A. pinnata which showed significant decreases in all parameters. The nutrient extraction by both plants from POME showed a positive effect on growth parameter, which has further promising potential to be used as animal feedstock. (C) 2020 Elsevier Ltd. All rights reserved.
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页数:13
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