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.

在这项研究中，在棕榈油磨坊污水（POME）中种植了两种原生浮萍（Lemna minor和Azolla pinnata），以从污水中提取营养。将5克A.羽叶和2g的L.次要转移至2升POME（初始浓度：198毫克/升COD，4.3毫克/升硝酸盐，pH值9.53，4毫克/升的磷酸盐，2.98毫克/升氨）在温室条件下使用四种不同的稀释度（2.5％，5％，10％，15％）。每两天至最多十天采集一次POME样品。在10天内对生长参数，磷酸盐，氨水，硝酸盐，pH和COD进行了监测，以为两种植物选择最合适的生长培养基。结果表明，2.5％，波姆光稀释对积极的影响属轻微增长，杉木（湿重分别增加了8.7 g和9.8 g），所有植物都能够存活到暴露的最后一天。最高去除氨气的方法是，用Pin。A. pinnata（98％）和L. minor（95.5％）稀释5％的POME 。在10％POME稀释93.3除去％得到最大除磷A.羽叶和86.7％由L.次要。小L.（78％）和A. pinnata（66％）获得了15％POME中的显着COD去除率。两种植物对植物修复过程都产生了积极的反应，特别是对pinaata显示所有参数均显着下降。两种植物从POME提取的养分均显示出对生长参数的积极影响，这具有进一步有望用作动物原料的潜力。